Mercurial > repos > shellac > guppy_basecaller
diff env/lib/python3.7/site-packages/cwltool/jshint/jshint.js @ 5:9b1c78e6ba9c draft default tip
"planemo upload commit 6c0a8142489327ece472c84e558c47da711a9142"
author | shellac |
---|---|
date | Mon, 01 Jun 2020 08:59:25 -0400 |
parents | 79f47841a781 |
children |
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--- a/env/lib/python3.7/site-packages/cwltool/jshint/jshint.js Thu May 14 16:47:39 2020 -0400 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,24568 +0,0 @@ -/* -Copyright 2012 Anton Kovalyov (http://jshint.com) - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be -included in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, -EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND -NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE -LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. -*/ -/*! 2.9.5 */ -var JSHINT; -if (typeof window === 'undefined') window = {}; -(function () { -var require; -require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){ -var identifierStartTable = []; - -for (var i = 0; i < 128; i++) { - identifierStartTable[i] = - i === 36 || // $ - i >= 65 && i <= 90 || // A-Z - i === 95 || // _ - i >= 97 && i <= 122; // a-z -} - -var identifierPartTable = []; - -for (var i = 0; i < 128; i++) { - identifierPartTable[i] = - identifierStartTable[i] || // $, _, A-Z, a-z - i >= 48 && i <= 57; // 0-9 -} - -module.exports = { - asciiIdentifierStartTable: identifierStartTable, - asciiIdentifierPartTable: identifierPartTable -}; - -},{}],2:[function(require,module,exports){ -var str = 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-var arr = str.split(',').map(function(code) { - return parseInt(code, 10); -}); -module.exports = arr; -},{}],4:[function(require,module,exports){ -// http://wiki.commonjs.org/wiki/Unit_Testing/1.0 -// -// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8! -// -// Originally from narwhal.js (http://narwhaljs.org) -// Copyright (c) 2009 Thomas Robinson <280north.com> -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the 'Software'), to -// deal in the Software without restriction, including without limitation the -// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or -// sell copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - -// when used in node, this will actually load the util module we depend on -// versus loading the builtin util module as happens otherwise -// this is a bug in node module loading as far as I am concerned -var util = require('util/'); - -var pSlice = Array.prototype.slice; -var hasOwn = Object.prototype.hasOwnProperty; - -// 1. The assert module provides functions that throw -// AssertionError's when particular conditions are not met. The -// assert module must conform to the following interface. - -var assert = module.exports = ok; - -// 2. The AssertionError is defined in assert. -// new assert.AssertionError({ message: message, -// actual: actual, -// expected: expected }) - -assert.AssertionError = function AssertionError(options) { - this.name = 'AssertionError'; - this.actual = options.actual; - this.expected = options.expected; - this.operator = options.operator; - if (options.message) { - this.message = options.message; - this.generatedMessage = false; - } else { - this.message = getMessage(this); - this.generatedMessage = true; - } - var stackStartFunction = options.stackStartFunction || fail; - - if (Error.captureStackTrace) { - Error.captureStackTrace(this, stackStartFunction); - } - else { - // non v8 browsers so we can have a stacktrace - var err = new Error(); - if (err.stack) { - var out = err.stack; - - // try to strip useless frames - var fn_name = stackStartFunction.name; - var idx = out.indexOf('\n' + fn_name); - if (idx >= 0) { - // once we have located the function frame - // we need to strip out everything before it (and its line) - var next_line = out.indexOf('\n', idx + 1); - out = out.substring(next_line + 1); - } - - this.stack = out; - } - } -}; - -// assert.AssertionError instanceof Error -util.inherits(assert.AssertionError, Error); - -function replacer(key, value) { - if (util.isUndefined(value)) { - return '' + value; - } - if (util.isNumber(value) && !isFinite(value)) { - return value.toString(); - } - if (util.isFunction(value) || util.isRegExp(value)) { - return value.toString(); - } - return value; -} - -function truncate(s, n) { - if (util.isString(s)) { - return s.length < n ? s : s.slice(0, n); - } else { - return s; - } -} - -function getMessage(self) { - return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' + - self.operator + ' ' + - truncate(JSON.stringify(self.expected, replacer), 128); -} - -// At present only the three keys mentioned above are used and -// understood by the spec. Implementations or sub modules can pass -// other keys to the AssertionError's constructor - they will be -// ignored. - -// 3. All of the following functions must throw an AssertionError -// when a corresponding condition is not met, with a message that -// may be undefined if not provided. All assertion methods provide -// both the actual and expected values to the assertion error for -// display purposes. - -function fail(actual, expected, message, operator, stackStartFunction) { - throw new assert.AssertionError({ - message: message, - actual: actual, - expected: expected, - operator: operator, - stackStartFunction: stackStartFunction - }); -} - -// EXTENSION! allows for well behaved errors defined elsewhere. -assert.fail = fail; - -// 4. Pure assertion tests whether a value is truthy, as determined -// by !!guard. -// assert.ok(guard, message_opt); -// This statement is equivalent to assert.equal(true, !!guard, -// message_opt);. To test strictly for the value true, use -// assert.strictEqual(true, guard, message_opt);. - -function ok(value, message) { - if (!value) fail(value, true, message, '==', assert.ok); -} -assert.ok = ok; - -// 5. The equality assertion tests shallow, coercive equality with -// ==. -// assert.equal(actual, expected, message_opt); - -assert.equal = function equal(actual, expected, message) { - if (actual != expected) fail(actual, expected, message, '==', assert.equal); -}; - -// 6. The non-equality assertion tests for whether two objects are not equal -// with != assert.notEqual(actual, expected, message_opt); - -assert.notEqual = function notEqual(actual, expected, message) { - if (actual == expected) { - fail(actual, expected, message, '!=', assert.notEqual); - } -}; - -// 7. The equivalence assertion tests a deep equality relation. -// assert.deepEqual(actual, expected, message_opt); - -assert.deepEqual = function deepEqual(actual, expected, message) { - if (!_deepEqual(actual, expected)) { - fail(actual, expected, message, 'deepEqual', assert.deepEqual); - } -}; - -function _deepEqual(actual, expected) { - // 7.1. All identical values are equivalent, as determined by ===. - if (actual === expected) { - return true; - - } else if (util.isBuffer(actual) && util.isBuffer(expected)) { - if (actual.length != expected.length) return false; - - for (var i = 0; i < actual.length; i++) { - if (actual[i] !== expected[i]) return false; - } - - return true; - - // 7.2. If the expected value is a Date object, the actual value is - // equivalent if it is also a Date object that refers to the same time. - } else if (util.isDate(actual) && util.isDate(expected)) { - return actual.getTime() === expected.getTime(); - - // 7.3 If the expected value is a RegExp object, the actual value is - // equivalent if it is also a RegExp object with the same source and - // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`). - } else if (util.isRegExp(actual) && util.isRegExp(expected)) { - return actual.source === expected.source && - actual.global === expected.global && - actual.multiline === expected.multiline && - actual.lastIndex === expected.lastIndex && - actual.ignoreCase === expected.ignoreCase; - - // 7.4. Other pairs that do not both pass typeof value == 'object', - // equivalence is determined by ==. - } else if (!util.isObject(actual) && !util.isObject(expected)) { - return actual == expected; - - // 7.5 For all other Object pairs, including Array objects, equivalence is - // determined by having the same number of owned properties (as verified - // with Object.prototype.hasOwnProperty.call), the same set of keys - // (although not necessarily the same order), equivalent values for every - // corresponding key, and an identical 'prototype' property. Note: this - // accounts for both named and indexed properties on Arrays. - } else { - return objEquiv(actual, expected); - } -} - -function isArguments(object) { - return Object.prototype.toString.call(object) == '[object Arguments]'; -} - -function objEquiv(a, b) { - if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b)) - return false; - // an identical 'prototype' property. - if (a.prototype !== b.prototype) return false; - // if one is a primitive, the other must be same - if (util.isPrimitive(a) || util.isPrimitive(b)) { - return a === b; - } - var aIsArgs = isArguments(a), - bIsArgs = isArguments(b); - if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs)) - return false; - if (aIsArgs) { - a = pSlice.call(a); - b = pSlice.call(b); - return _deepEqual(a, b); - } - var ka = objectKeys(a), - kb = objectKeys(b), - key, i; - // having the same number of owned properties (keys incorporates - // hasOwnProperty) - if (ka.length != kb.length) - return false; - //the same set of keys (although not necessarily the same order), - ka.sort(); - kb.sort(); - //~~~cheap key test - for (i = ka.length - 1; i >= 0; i--) { - if (ka[i] != kb[i]) - return false; - } - //equivalent values for every corresponding key, and - //~~~possibly expensive deep test - for (i = ka.length - 1; i >= 0; i--) { - key = ka[i]; - if (!_deepEqual(a[key], b[key])) return false; - } - return true; -} - -// 8. The non-equivalence assertion tests for any deep inequality. -// assert.notDeepEqual(actual, expected, message_opt); - -assert.notDeepEqual = function notDeepEqual(actual, expected, message) { - if (_deepEqual(actual, expected)) { - fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual); - } -}; - -// 9. The strict equality assertion tests strict equality, as determined by ===. -// assert.strictEqual(actual, expected, message_opt); - -assert.strictEqual = function strictEqual(actual, expected, message) { - if (actual !== expected) { - fail(actual, expected, message, '===', assert.strictEqual); - } -}; - -// 10. The strict non-equality assertion tests for strict inequality, as -// determined by !==. assert.notStrictEqual(actual, expected, message_opt); - -assert.notStrictEqual = function notStrictEqual(actual, expected, message) { - if (actual === expected) { - fail(actual, expected, message, '!==', assert.notStrictEqual); - } -}; - -function expectedException(actual, expected) { - if (!actual || !expected) { - return false; - } - - if (Object.prototype.toString.call(expected) == '[object RegExp]') { - return expected.test(actual); - } else if (actual instanceof expected) { - return true; - } else if (expected.call({}, actual) === true) { - return true; - } - - return false; -} - -function _throws(shouldThrow, block, expected, message) { - var actual; - - if (util.isString(expected)) { - message = expected; - expected = null; - } - - try { - block(); - } catch (e) { - actual = e; - } - - message = (expected && expected.name ? ' (' + expected.name + ').' : '.') + - (message ? ' ' + message : '.'); - - if (shouldThrow && !actual) { - fail(actual, expected, 'Missing expected exception' + message); - } - - if (!shouldThrow && expectedException(actual, expected)) { - fail(actual, expected, 'Got unwanted exception' + message); - } - - if ((shouldThrow && actual && expected && - !expectedException(actual, expected)) || (!shouldThrow && actual)) { - throw actual; - } -} - -// 11. Expected to throw an error: -// assert.throws(block, Error_opt, message_opt); - -assert.throws = function(block, /*optional*/error, /*optional*/message) { - _throws.apply(this, [true].concat(pSlice.call(arguments))); -}; - -// EXTENSION! This is annoying to write outside this module. -assert.doesNotThrow = function(block, /*optional*/message) { - _throws.apply(this, [false].concat(pSlice.call(arguments))); -}; - -assert.ifError = function(err) { if (err) {throw err;}}; - -var objectKeys = Object.keys || function (obj) { - var keys = []; - for (var key in obj) { - if (hasOwn.call(obj, key)) keys.push(key); - } - return keys; -}; - -},{"util/":9}],5:[function(require,module,exports){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -function EventEmitter() { - this._events = this._events || {}; - this._maxListeners = this._maxListeners || undefined; -} -module.exports = EventEmitter; - -// Backwards-compat with node 0.10.x -EventEmitter.EventEmitter = EventEmitter; - -EventEmitter.prototype._events = undefined; -EventEmitter.prototype._maxListeners = undefined; - -// By default EventEmitters will print a warning if more than 10 listeners are -// added to it. This is a useful default which helps finding memory leaks. -EventEmitter.defaultMaxListeners = 10; - -// Obviously not all Emitters should be limited to 10. This function allows -// that to be increased. Set to zero for unlimited. -EventEmitter.prototype.setMaxListeners = function(n) { - if (!isNumber(n) || n < 0 || isNaN(n)) - throw TypeError('n must be a positive number'); - this._maxListeners = n; - return this; -}; - -EventEmitter.prototype.emit = function(type) { - var er, handler, len, args, i, listeners; - - if (!this._events) - this._events = {}; - - // If there is no 'error' event listener then throw. - if (type === 'error') { - if (!this._events.error || - (isObject(this._events.error) && !this._events.error.length)) { - er = arguments[1]; - if (er instanceof Error) { - throw er; // Unhandled 'error' event - } - throw TypeError('Uncaught, unspecified "error" event.'); - } - } - - handler = this._events[type]; - - if (isUndefined(handler)) - return false; - - if (isFunction(handler)) { - switch (arguments.length) { - // fast cases - case 1: - handler.call(this); - break; - case 2: - handler.call(this, arguments[1]); - break; - case 3: - handler.call(this, arguments[1], arguments[2]); - break; - // slower - default: - len = arguments.length; - args = new Array(len - 1); - for (i = 1; i < len; i++) - args[i - 1] = arguments[i]; - handler.apply(this, args); - } - } else if (isObject(handler)) { - len = arguments.length; - args = new Array(len - 1); - for (i = 1; i < len; i++) - args[i - 1] = arguments[i]; - - listeners = handler.slice(); - len = listeners.length; - for (i = 0; i < len; i++) - listeners[i].apply(this, args); - } - - return true; -}; - -EventEmitter.prototype.addListener = function(type, listener) { - var m; - - if (!isFunction(listener)) - throw TypeError('listener must be a function'); - - if (!this._events) - this._events = {}; - - // To avoid recursion in the case that type === "newListener"! Before - // adding it to the listeners, first emit "newListener". - if (this._events.newListener) - this.emit('newListener', type, - isFunction(listener.listener) ? - listener.listener : listener); - - if (!this._events[type]) - // Optimize the case of one listener. Don't need the extra array object. - this._events[type] = listener; - else if (isObject(this._events[type])) - // If we've already got an array, just append. - this._events[type].push(listener); - else - // Adding the second element, need to change to array. - this._events[type] = [this._events[type], listener]; - - // Check for listener leak - if (isObject(this._events[type]) && !this._events[type].warned) { - var m; - if (!isUndefined(this._maxListeners)) { - m = this._maxListeners; - } else { - m = EventEmitter.defaultMaxListeners; - } - - if (m && m > 0 && this._events[type].length > m) { - this._events[type].warned = true; - console.error('(node) warning: possible EventEmitter memory ' + - 'leak detected. %d listeners added. ' + - 'Use emitter.setMaxListeners() to increase limit.', - this._events[type].length); - if (typeof console.trace === 'function') { - // not supported in IE 10 - console.trace(); - } - } - } - - return this; -}; - -EventEmitter.prototype.on = EventEmitter.prototype.addListener; - -EventEmitter.prototype.once = function(type, listener) { - if (!isFunction(listener)) - throw TypeError('listener must be a function'); - - var fired = false; - - function g() { - this.removeListener(type, g); - - if (!fired) { - fired = true; - listener.apply(this, arguments); - } - } - - g.listener = listener; - this.on(type, g); - - return this; -}; - -// emits a 'removeListener' event iff the listener was removed -EventEmitter.prototype.removeListener = function(type, listener) { - var list, position, length, i; - - if (!isFunction(listener)) - throw TypeError('listener must be a function'); - - if (!this._events || !this._events[type]) - return this; - - list = this._events[type]; - length = list.length; - position = -1; - - if (list === listener || - (isFunction(list.listener) && list.listener === listener)) { - delete this._events[type]; - if (this._events.removeListener) - this.emit('removeListener', type, listener); - - } else if (isObject(list)) { - for (i = length; i-- > 0;) { - if (list[i] === listener || - (list[i].listener && list[i].listener === listener)) { - position = i; - break; - } - } - - if (position < 0) - return this; - - if (list.length === 1) { - list.length = 0; - delete this._events[type]; - } else { - list.splice(position, 1); - } - - if (this._events.removeListener) - this.emit('removeListener', type, listener); - } - - return this; -}; - -EventEmitter.prototype.removeAllListeners = function(type) { - var key, listeners; - - if (!this._events) - return this; - - // not listening for removeListener, no need to emit - if (!this._events.removeListener) { - if (arguments.length === 0) - this._events = {}; - else if (this._events[type]) - delete this._events[type]; - return this; - } - - // emit removeListener for all listeners on all events - if (arguments.length === 0) { - for (key in this._events) { - if (key === 'removeListener') continue; - this.removeAllListeners(key); - } - this.removeAllListeners('removeListener'); - this._events = {}; - return this; - } - - listeners = this._events[type]; - - if (isFunction(listeners)) { - this.removeListener(type, listeners); - } else { - // LIFO order - while (listeners.length) - this.removeListener(type, listeners[listeners.length - 1]); - } - delete this._events[type]; - - return this; -}; - -EventEmitter.prototype.listeners = function(type) { - var ret; - if (!this._events || !this._events[type]) - ret = []; - else if (isFunction(this._events[type])) - ret = [this._events[type]]; - else - ret = this._events[type].slice(); - return ret; -}; - -EventEmitter.listenerCount = function(emitter, type) { - var ret; - if (!emitter._events || !emitter._events[type]) - ret = 0; - else if (isFunction(emitter._events[type])) - ret = 1; - else - ret = emitter._events[type].length; - return ret; -}; - -function isFunction(arg) { - return typeof arg === 'function'; -} - -function isNumber(arg) { - return typeof arg === 'number'; -} - -function isObject(arg) { - return typeof arg === 'object' && arg !== null; -} - -function isUndefined(arg) { - return arg === void 0; -} - -},{}],6:[function(require,module,exports){ -// shim for using process in browser - -var process = module.exports = {}; -var queue = []; -var draining = false; - -function drainQueue() { - if (draining) { - return; - } - draining = true; - var currentQueue; - var len = queue.length; - while(len) { - currentQueue = queue; - queue = []; - var i = -1; - while (++i < len) { - currentQueue[i](); - } - len = queue.length; - } - draining = false; -} -process.nextTick = function (fun) { - queue.push(fun); - if (!draining) { - setTimeout(drainQueue, 0); - } -}; - -process.title = 'browser'; -process.browser = true; -process.env = {}; -process.argv = []; -process.version = ''; // empty string to avoid regexp issues -process.versions = {}; - -function noop() {} - -process.on = noop; -process.addListener = noop; -process.once = noop; -process.off = noop; -process.removeListener = noop; -process.removeAllListeners = noop; -process.emit = noop; - -process.binding = function (name) { - throw new Error('process.binding is not supported'); -}; - -// TODO(shtylman) -process.cwd = function () { return '/' }; -process.chdir = function (dir) { - throw new Error('process.chdir is not supported'); -}; -process.umask = function() { return 0; }; - -},{}],7:[function(require,module,exports){ -if (typeof Object.create === 'function') { - // implementation from standard node.js 'util' module - module.exports = function inherits(ctor, superCtor) { - ctor.super_ = superCtor - ctor.prototype = Object.create(superCtor.prototype, { - constructor: { - value: ctor, - enumerable: false, - writable: true, - configurable: true - } - }); - }; -} else { - // old school shim for old browsers - module.exports = function inherits(ctor, superCtor) { - ctor.super_ = superCtor - var TempCtor = function () {} - TempCtor.prototype = superCtor.prototype - ctor.prototype = new TempCtor() - ctor.prototype.constructor = ctor - } -} - -},{}],8:[function(require,module,exports){ -module.exports = function isBuffer(arg) { - return arg && typeof arg === 'object' - && typeof arg.copy === 'function' - && typeof arg.fill === 'function' - && typeof arg.readUInt8 === 'function'; -} -},{}],9:[function(require,module,exports){ -(function (process,global){ -// Copyright Joyent, Inc. and other Node contributors. -// -// Permission is hereby granted, free of charge, to any person obtaining a -// copy of this software and associated documentation files (the -// "Software"), to deal in the Software without restriction, including -// without limitation the rights to use, copy, modify, merge, publish, -// distribute, sublicense, and/or sell copies of the Software, and to permit -// persons to whom the Software is furnished to do so, subject to the -// following conditions: -// -// The above copyright notice and this permission notice shall be included -// in all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN -// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, -// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR -// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE -// USE OR OTHER DEALINGS IN THE SOFTWARE. - -var formatRegExp = /%[sdj%]/g; -exports.format = function(f) { - if (!isString(f)) { - var objects = []; - for (var i = 0; i < arguments.length; i++) { - objects.push(inspect(arguments[i])); - } - return objects.join(' '); - } - - var i = 1; - var args = arguments; - var len = args.length; - var str = String(f).replace(formatRegExp, function(x) { - if (x === '%%') return '%'; - if (i >= len) return x; - switch (x) { - case '%s': return String(args[i++]); - case '%d': return Number(args[i++]); - case '%j': - try { - return JSON.stringify(args[i++]); - } catch (_) { - return '[Circular]'; - } - default: - return x; - } - }); - for (var x = args[i]; i < len; x = args[++i]) { - if (isNull(x) || !isObject(x)) { - str += ' ' + x; - } else { - str += ' ' + inspect(x); - } - } - return str; -}; - - -// Mark that a method should not be used. -// Returns a modified function which warns once by default. -// If --no-deprecation is set, then it is a no-op. -exports.deprecate = function(fn, msg) { - // Allow for deprecating things in the process of starting up. - if (isUndefined(global.process)) { - return function() { - return exports.deprecate(fn, msg).apply(this, arguments); - }; - } - - if (process.noDeprecation === true) { - return fn; - } - - var warned = false; - function deprecated() { - if (!warned) { - if (process.throwDeprecation) { - throw new Error(msg); - } else if (process.traceDeprecation) { - console.trace(msg); - } else { - console.error(msg); - } - warned = true; - } - return fn.apply(this, arguments); - } - - return deprecated; -}; - - -var debugs = {}; -var debugEnviron; -exports.debuglog = function(set) { - if (isUndefined(debugEnviron)) - debugEnviron = process.env.NODE_DEBUG || ''; - set = set.toUpperCase(); - if (!debugs[set]) { - if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) { - var pid = process.pid; - debugs[set] = function() { - var msg = exports.format.apply(exports, arguments); - console.error('%s %d: %s', set, pid, msg); - }; - } else { - debugs[set] = function() {}; - } - } - return debugs[set]; -}; - - -/** - * Echos the value of a value. Trys to print the value out - * in the best way possible given the different types. - * - * @param {Object} obj The object to print out. - * @param {Object} opts Optional options object that alters the output. - */ -/* legacy: obj, showHidden, depth, colors*/ -function inspect(obj, opts) { - // default options - var ctx = { - seen: [], - stylize: stylizeNoColor - }; - // legacy... - if (arguments.length >= 3) ctx.depth = arguments[2]; - if (arguments.length >= 4) ctx.colors = arguments[3]; - if (isBoolean(opts)) { - // legacy... - ctx.showHidden = opts; - } else if (opts) { - // got an "options" object - exports._extend(ctx, opts); - } - // set default options - if (isUndefined(ctx.showHidden)) ctx.showHidden = false; - if (isUndefined(ctx.depth)) ctx.depth = 2; - if (isUndefined(ctx.colors)) ctx.colors = false; - if (isUndefined(ctx.customInspect)) ctx.customInspect = true; - if (ctx.colors) ctx.stylize = stylizeWithColor; - return formatValue(ctx, obj, ctx.depth); -} -exports.inspect = inspect; - - -// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics -inspect.colors = { - 'bold' : [1, 22], - 'italic' : [3, 23], - 'underline' : [4, 24], - 'inverse' : [7, 27], - 'white' : [37, 39], - 'grey' : [90, 39], - 'black' : [30, 39], - 'blue' : [34, 39], - 'cyan' : [36, 39], - 'green' : [32, 39], - 'magenta' : [35, 39], - 'red' : [31, 39], - 'yellow' : [33, 39] -}; - -// Don't use 'blue' not visible on cmd.exe -inspect.styles = { - 'special': 'cyan', - 'number': 'yellow', - 'boolean': 'yellow', - 'undefined': 'grey', - 'null': 'bold', - 'string': 'green', - 'date': 'magenta', - // "name": intentionally not styling - 'regexp': 'red' -}; - - -function stylizeWithColor(str, styleType) { - var style = inspect.styles[styleType]; - - if (style) { - return '\u001b[' + inspect.colors[style][0] + 'm' + str + - '\u001b[' + inspect.colors[style][1] + 'm'; - } else { - return str; - } -} - - -function stylizeNoColor(str, styleType) { - return str; -} - - -function arrayToHash(array) { - var hash = {}; - - array.forEach(function(val, idx) { - hash[val] = true; - }); - - return hash; -} - - -function formatValue(ctx, value, recurseTimes) { - // Provide a hook for user-specified inspect functions. - // Check that value is an object with an inspect function on it - if (ctx.customInspect && - value && - isFunction(value.inspect) && - // Filter out the util module, it's inspect function is special - value.inspect !== exports.inspect && - // Also filter out any prototype objects using the circular check. - !(value.constructor && value.constructor.prototype === value)) { - var ret = value.inspect(recurseTimes, ctx); - if (!isString(ret)) { - ret = formatValue(ctx, ret, recurseTimes); - } - return ret; - } - - // Primitive types cannot have properties - var primitive = formatPrimitive(ctx, value); - if (primitive) { - return primitive; - } - - // Look up the keys of the object. - var keys = Object.keys(value); - var visibleKeys = arrayToHash(keys); - - if (ctx.showHidden) { - keys = Object.getOwnPropertyNames(value); - } - - // IE doesn't make error fields non-enumerable - // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx - if (isError(value) - && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) { - return formatError(value); - } - - // Some type of object without properties can be shortcutted. - if (keys.length === 0) { - if (isFunction(value)) { - var name = value.name ? ': ' + value.name : ''; - return ctx.stylize('[Function' + name + ']', 'special'); - } - if (isRegExp(value)) { - return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp'); - } - if (isDate(value)) { - return ctx.stylize(Date.prototype.toString.call(value), 'date'); - } - if (isError(value)) { - return formatError(value); - } - } - - var base = '', array = false, braces = ['{', '}']; - - // Make Array say that they are Array - if (isArray(value)) { - array = true; - braces = ['[', ']']; - } - - // Make functions say that they are functions - if (isFunction(value)) { - var n = value.name ? ': ' + value.name : ''; - base = ' [Function' + n + ']'; - } - - // Make RegExps say that they are RegExps - if (isRegExp(value)) { - base = ' ' + RegExp.prototype.toString.call(value); - } - - // Make dates with properties first say the date - if (isDate(value)) { - base = ' ' + Date.prototype.toUTCString.call(value); - } - - // Make error with message first say the error - if (isError(value)) { - base = ' ' + formatError(value); - } - - if (keys.length === 0 && (!array || value.length == 0)) { - return braces[0] + base + braces[1]; - } - - if (recurseTimes < 0) { - if (isRegExp(value)) { - return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp'); - } else { - return ctx.stylize('[Object]', 'special'); - } - } - - ctx.seen.push(value); - - var output; - if (array) { - output = formatArray(ctx, value, recurseTimes, visibleKeys, keys); - } else { - output = keys.map(function(key) { - return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array); - }); - } - - ctx.seen.pop(); - - return reduceToSingleString(output, base, braces); -} - - -function formatPrimitive(ctx, value) { - if (isUndefined(value)) - return ctx.stylize('undefined', 'undefined'); - if (isString(value)) { - var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '') - .replace(/'/g, "\\'") - .replace(/\\"/g, '"') + '\''; - return ctx.stylize(simple, 'string'); - } - if (isNumber(value)) - return ctx.stylize('' + value, 'number'); - if (isBoolean(value)) - return ctx.stylize('' + value, 'boolean'); - // For some reason typeof null is "object", so special case here. - if (isNull(value)) - return ctx.stylize('null', 'null'); -} - - -function formatError(value) { - return '[' + Error.prototype.toString.call(value) + ']'; -} - - -function formatArray(ctx, value, recurseTimes, visibleKeys, keys) { - var output = []; - for (var i = 0, l = value.length; i < l; ++i) { - if (hasOwnProperty(value, String(i))) { - output.push(formatProperty(ctx, value, recurseTimes, visibleKeys, - String(i), true)); - } else { - output.push(''); - } - } - keys.forEach(function(key) { - if (!key.match(/^\d+$/)) { - output.push(formatProperty(ctx, value, recurseTimes, visibleKeys, - key, true)); - } - }); - return output; -} - - -function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) { - var name, str, desc; - desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] }; - if (desc.get) { - if (desc.set) { - str = ctx.stylize('[Getter/Setter]', 'special'); - } else { - str = ctx.stylize('[Getter]', 'special'); - } - } else { - if (desc.set) { - str = ctx.stylize('[Setter]', 'special'); - } - } - if (!hasOwnProperty(visibleKeys, key)) { - name = '[' + key + ']'; - } - if (!str) { - if (ctx.seen.indexOf(desc.value) < 0) { - if (isNull(recurseTimes)) { - str = formatValue(ctx, desc.value, null); - } else { - str = formatValue(ctx, desc.value, recurseTimes - 1); - } - if (str.indexOf('\n') > -1) { - if (array) { - str = str.split('\n').map(function(line) { - return ' ' + line; - }).join('\n').substr(2); - } else { - str = '\n' + str.split('\n').map(function(line) { - return ' ' + line; - }).join('\n'); - } - } - } else { - str = ctx.stylize('[Circular]', 'special'); - } - } - if (isUndefined(name)) { - if (array && key.match(/^\d+$/)) { - return str; - } - name = JSON.stringify('' + key); - if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) { - name = name.substr(1, name.length - 2); - name = ctx.stylize(name, 'name'); - } else { - name = name.replace(/'/g, "\\'") - .replace(/\\"/g, '"') - .replace(/(^"|"$)/g, "'"); - name = ctx.stylize(name, 'string'); - } - } - - return name + ': ' + str; -} - - -function reduceToSingleString(output, base, braces) { - var numLinesEst = 0; - var length = output.reduce(function(prev, cur) { - numLinesEst++; - if (cur.indexOf('\n') >= 0) numLinesEst++; - return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1; - }, 0); - - if (length > 60) { - return braces[0] + - (base === '' ? '' : base + '\n ') + - ' ' + - output.join(',\n ') + - ' ' + - braces[1]; - } - - return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1]; -} - - -// NOTE: These type checking functions intentionally don't use `instanceof` -// because it is fragile and can be easily faked with `Object.create()`. -function isArray(ar) { - return Array.isArray(ar); -} -exports.isArray = isArray; - -function isBoolean(arg) { - return typeof arg === 'boolean'; -} -exports.isBoolean = isBoolean; - -function isNull(arg) { - return arg === null; -} -exports.isNull = isNull; - -function isNullOrUndefined(arg) { - return arg == null; -} -exports.isNullOrUndefined = isNullOrUndefined; - -function isNumber(arg) { - return typeof arg === 'number'; -} -exports.isNumber = isNumber; - -function isString(arg) { - return typeof arg === 'string'; -} -exports.isString = isString; - -function isSymbol(arg) { - return typeof arg === 'symbol'; -} -exports.isSymbol = isSymbol; - -function isUndefined(arg) { - return arg === void 0; -} -exports.isUndefined = isUndefined; - -function isRegExp(re) { - return isObject(re) && objectToString(re) === '[object RegExp]'; -} -exports.isRegExp = isRegExp; - -function isObject(arg) { - return typeof arg === 'object' && arg !== null; -} -exports.isObject = isObject; - -function isDate(d) { - return isObject(d) && objectToString(d) === '[object Date]'; -} -exports.isDate = isDate; - -function isError(e) { - return isObject(e) && - (objectToString(e) === '[object Error]' || e instanceof Error); -} -exports.isError = isError; - -function isFunction(arg) { - return typeof arg === 'function'; -} -exports.isFunction = isFunction; - -function isPrimitive(arg) { - return arg === null || - typeof arg === 'boolean' || - typeof arg === 'number' || - typeof arg === 'string' || - typeof arg === 'symbol' || // ES6 symbol - typeof arg === 'undefined'; -} -exports.isPrimitive = isPrimitive; - -exports.isBuffer = require('./support/isBuffer'); - -function objectToString(o) { - return Object.prototype.toString.call(o); -} - - -function pad(n) { - return n < 10 ? '0' + n.toString(10) : n.toString(10); -} - - -var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', - 'Oct', 'Nov', 'Dec']; - -// 26 Feb 16:19:34 -function timestamp() { - var d = new Date(); - var time = [pad(d.getHours()), - pad(d.getMinutes()), - pad(d.getSeconds())].join(':'); - return [d.getDate(), months[d.getMonth()], time].join(' '); -} - - -// log is just a thin wrapper to console.log that prepends a timestamp -exports.log = function() { - console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments)); -}; - - -/** - * Inherit the prototype methods from one constructor into another. - * - * The Function.prototype.inherits from lang.js rewritten as a standalone - * function (not on Function.prototype). NOTE: If this file is to be loaded - * during bootstrapping this function needs to be rewritten using some native - * functions as prototype setup using normal JavaScript does not work as - * expected during bootstrapping (see mirror.js in r114903). - * - * @param {function} ctor Constructor function which needs to inherit the - * prototype. - * @param {function} superCtor Constructor function to inherit prototype from. - */ -exports.inherits = require('inherits'); - -exports._extend = function(origin, add) { - // Don't do anything if add isn't an object - if (!add || !isObject(add)) return origin; - - var keys = Object.keys(add); - var i = keys.length; - while (i--) { - origin[keys[i]] = add[keys[i]]; - } - return origin; -}; - -function hasOwnProperty(obj, prop) { - return Object.prototype.hasOwnProperty.call(obj, prop); -} - -}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"./support/isBuffer":8,"_process":6,"inherits":7}],10:[function(require,module,exports){ -(function (global){ -/*global window, global*/ -var util = require("util") -var assert = require("assert") -var now = require("date-now") - -var slice = Array.prototype.slice -var console -var times = {} - -if (typeof global !== "undefined" && global.console) { - console = global.console -} else if (typeof window !== "undefined" && window.console) { - console = window.console -} else { - console = {} -} - -var functions = [ - [log, "log"], - [info, "info"], - [warn, "warn"], - [error, "error"], - [time, "time"], - [timeEnd, "timeEnd"], - [trace, "trace"], - [dir, "dir"], - [consoleAssert, "assert"] -] - -for (var i = 0; i < functions.length; i++) { - var tuple = functions[i] - var f = tuple[0] - var name = tuple[1] - - if (!console[name]) { - console[name] = f - } -} - -module.exports = console - -function log() {} - -function info() { - console.log.apply(console, arguments) -} - -function warn() { - console.log.apply(console, arguments) -} - -function error() { - console.warn.apply(console, arguments) -} - -function time(label) { - times[label] = now() -} - -function timeEnd(label) { - var time = times[label] - if (!time) { - throw new Error("No such label: " + label) - } - - var duration = now() - time - console.log(label + ": " + duration + "ms") -} - -function trace() { - var err = new Error() - err.name = "Trace" - err.message = util.format.apply(null, arguments) - console.error(err.stack) -} - -function dir(object) { - console.log(util.inspect(object) + "\n") -} - -function consoleAssert(expression) { - if (!expression) { - var arr = slice.call(arguments, 1) - assert.ok(false, util.format.apply(null, arr)) - } -} - -}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{"assert":4,"date-now":11,"util":9}],11:[function(require,module,exports){ -module.exports = now - -function now() { - return new Date().getTime() -} - -},{}],12:[function(require,module,exports){ -(function (global){ -/** - * @license - * lodash 3.7.0 (Custom Build) <https://lodash.com/> - * Build: `lodash modern -d -o ./index.js` - * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/> - * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE> - * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors - * Available under MIT license <https://lodash.com/license> - */ -;(function() { - - /** Used as a safe reference for `undefined` in pre-ES5 environments. */ - var undefined; - - /** Used as the semantic version number. */ - var VERSION = '3.7.0'; - - /** Used to compose bitmasks for wrapper metadata. */ - var BIND_FLAG = 1, - BIND_KEY_FLAG = 2, - CURRY_BOUND_FLAG = 4, - CURRY_FLAG = 8, - CURRY_RIGHT_FLAG = 16, - PARTIAL_FLAG = 32, - PARTIAL_RIGHT_FLAG = 64, - ARY_FLAG = 128, - REARG_FLAG = 256; - - /** Used as default options for `_.trunc`. */ - var DEFAULT_TRUNC_LENGTH = 30, - DEFAULT_TRUNC_OMISSION = '...'; - - /** Used to detect when a function becomes hot. */ - var HOT_COUNT = 150, - HOT_SPAN = 16; - - /** Used to indicate the type of lazy iteratees. */ - var LAZY_DROP_WHILE_FLAG = 0, - LAZY_FILTER_FLAG = 1, - LAZY_MAP_FLAG = 2; - - /** Used as the `TypeError` message for "Functions" methods. */ - var FUNC_ERROR_TEXT = 'Expected a function'; - - /** Used as the internal argument placeholder. */ - var PLACEHOLDER = '__lodash_placeholder__'; - - /** `Object#toString` result references. */ - var argsTag = '[object Arguments]', - arrayTag = '[object Array]', - boolTag = '[object Boolean]', - dateTag = '[object Date]', - errorTag = '[object Error]', - funcTag = '[object Function]', - mapTag = '[object Map]', - numberTag = '[object Number]', - objectTag = '[object Object]', - regexpTag = '[object RegExp]', - setTag = '[object Set]', - stringTag = '[object String]', - weakMapTag = '[object WeakMap]'; - - var arrayBufferTag = '[object ArrayBuffer]', - float32Tag = '[object Float32Array]', - float64Tag = '[object Float64Array]', - int8Tag = '[object Int8Array]', - int16Tag = '[object Int16Array]', - int32Tag = '[object Int32Array]', - uint8Tag = '[object Uint8Array]', - uint8ClampedTag = '[object Uint8ClampedArray]', - uint16Tag = '[object Uint16Array]', - uint32Tag = '[object Uint32Array]'; - - /** Used to match empty string literals in compiled template source. */ - var reEmptyStringLeading = /\b__p \+= '';/g, - reEmptyStringMiddle = /\b(__p \+=) '' \+/g, - reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g; - - /** Used to match HTML entities and HTML characters. */ - var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g, - reUnescapedHtml = /[&<>"'`]/g, - reHasEscapedHtml = RegExp(reEscapedHtml.source), - reHasUnescapedHtml = RegExp(reUnescapedHtml.source); - - /** Used to match template delimiters. */ - var reEscape = /<%-([\s\S]+?)%>/g, - reEvaluate = /<%([\s\S]+?)%>/g, - reInterpolate = /<%=([\s\S]+?)%>/g; - - /** Used to match property names within property paths. */ - var reIsDeepProp = /\.|\[(?:[^[\]]+|(["'])(?:(?!\1)[^\n\\]|\\.)*?)\1\]/, - reIsPlainProp = /^\w*$/, - rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\n\\]|\\.)*?)\2)\]/g; - - /** - * Used to match `RegExp` [special characters](http://www.regular-expressions.info/characters.html#special). - * In addition to special characters the forward slash is escaped to allow for - * easier `eval` use and `Function` compilation. - */ - var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g, - reHasRegExpChars = RegExp(reRegExpChars.source); - - /** Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). */ - var reComboMark = /[\u0300-\u036f\ufe20-\ufe23]/g; - - /** Used to match backslashes in property paths. */ - var reEscapeChar = /\\(\\)?/g; - - /** Used to match [ES template delimiters](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-template-literal-lexical-components). */ - var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g; - - /** Used to match `RegExp` flags from their coerced string values. */ - var reFlags = /\w*$/; - - /** Used to detect hexadecimal string values. */ - var reHasHexPrefix = /^0[xX]/; - - /** Used to detect host constructors (Safari > 5). */ - var reIsHostCtor = /^\[object .+?Constructor\]$/; - - /** Used to match latin-1 supplementary letters (excluding mathematical operators). */ - var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g; - - /** Used to ensure capturing order of template delimiters. */ - var reNoMatch = /($^)/; - - /** Used to match unescaped characters in compiled string literals. */ - var reUnescapedString = /['\n\r\u2028\u2029\\]/g; - - /** Used to match words to create compound words. */ - var reWords = (function() { - var upper = '[A-Z\\xc0-\\xd6\\xd8-\\xde]', - lower = '[a-z\\xdf-\\xf6\\xf8-\\xff]+'; - - return RegExp(upper + '+(?=' + upper + lower + ')|' + upper + '?' + lower + '|' + upper + '+|[0-9]+', 'g'); - }()); - - /** Used to detect and test for whitespace. */ - var whitespace = ( - // Basic whitespace characters. - ' \t\x0b\f\xa0\ufeff' + - - // Line terminators. - '\n\r\u2028\u2029' + - - // Unicode category "Zs" space separators. - '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000' - ); - - /** Used to assign default `context` object properties. */ - var contextProps = [ - 'Array', 'ArrayBuffer', 'Date', 'Error', 'Float32Array', 'Float64Array', - 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Math', 'Number', - 'Object', 'RegExp', 'Set', 'String', '_', 'clearTimeout', 'document', - 'isFinite', 'parseInt', 'setTimeout', 'TypeError', 'Uint8Array', - 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', - 'window' - ]; - - /** Used to make template sourceURLs easier to identify. */ - var templateCounter = -1; - - /** Used to identify `toStringTag` values of typed arrays. */ - var typedArrayTags = {}; - typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = - typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = - typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = - typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = - typedArrayTags[uint32Tag] = true; - typedArrayTags[argsTag] = typedArrayTags[arrayTag] = - typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = - typedArrayTags[dateTag] = typedArrayTags[errorTag] = - typedArrayTags[funcTag] = typedArrayTags[mapTag] = - typedArrayTags[numberTag] = typedArrayTags[objectTag] = - typedArrayTags[regexpTag] = typedArrayTags[setTag] = - typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false; - - /** Used to identify `toStringTag` values supported by `_.clone`. */ - var cloneableTags = {}; - cloneableTags[argsTag] = cloneableTags[arrayTag] = - cloneableTags[arrayBufferTag] = cloneableTags[boolTag] = - cloneableTags[dateTag] = cloneableTags[float32Tag] = - cloneableTags[float64Tag] = cloneableTags[int8Tag] = - cloneableTags[int16Tag] = cloneableTags[int32Tag] = - cloneableTags[numberTag] = cloneableTags[objectTag] = - cloneableTags[regexpTag] = cloneableTags[stringTag] = - cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = - cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true; - cloneableTags[errorTag] = cloneableTags[funcTag] = - cloneableTags[mapTag] = cloneableTags[setTag] = - cloneableTags[weakMapTag] = false; - - /** Used as an internal `_.debounce` options object by `_.throttle`. */ - var debounceOptions = { - 'leading': false, - 'maxWait': 0, - 'trailing': false - }; - - /** Used to map latin-1 supplementary letters to basic latin letters. */ - var deburredLetters = { - '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A', - '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a', - '\xc7': 'C', '\xe7': 'c', - '\xd0': 'D', '\xf0': 'd', - '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E', - '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e', - '\xcC': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I', - '\xeC': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i', - '\xd1': 'N', '\xf1': 'n', - '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O', - '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o', - '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U', - '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u', - '\xdd': 'Y', '\xfd': 'y', '\xff': 'y', - '\xc6': 'Ae', '\xe6': 'ae', - '\xde': 'Th', '\xfe': 'th', - '\xdf': 'ss' - }; - - /** Used to map characters to HTML entities. */ - var htmlEscapes = { - '&': '&', - '<': '<', - '>': '>', - '"': '"', - "'": ''', - '`': '`' - }; - - /** Used to map HTML entities to characters. */ - var htmlUnescapes = { - '&': '&', - '<': '<', - '>': '>', - '"': '"', - ''': "'", - '`': '`' - }; - - /** Used to determine if values are of the language type `Object`. */ - var objectTypes = { - 'function': true, - 'object': true - }; - - /** Used to escape characters for inclusion in compiled string literals. */ - var stringEscapes = { - '\\': '\\', - "'": "'", - '\n': 'n', - '\r': 'r', - '\u2028': 'u2028', - '\u2029': 'u2029' - }; - - /** Detect free variable `exports`. */ - var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports; - - /** Detect free variable `module`. */ - var freeModule = objectTypes[typeof module] && module && !module.nodeType && module; - - /** Detect free variable `global` from Node.js. */ - var freeGlobal = freeExports && freeModule && typeof global == 'object' && global && global.Object && global; - - /** Detect free variable `self`. */ - var freeSelf = objectTypes[typeof self] && self && self.Object && self; - - /** Detect free variable `window`. */ - var freeWindow = objectTypes[typeof window] && window && window.Object && window; - - /** Detect the popular CommonJS extension `module.exports`. */ - var moduleExports = freeModule && freeModule.exports === freeExports && freeExports; - - /** - * Used as a reference to the global object. - * - * The `this` value is used if it is the global object to avoid Greasemonkey's - * restricted `window` object, otherwise the `window` object is used. - */ - var root = freeGlobal || ((freeWindow !== (this && this.window)) && freeWindow) || freeSelf || this; - - /*--------------------------------------------------------------------------*/ - - /** - * The base implementation of `compareAscending` which compares values and - * sorts them in ascending order without guaranteeing a stable sort. - * - * @private - * @param {*} value The value to compare to `other`. - * @param {*} other The value to compare to `value`. - * @returns {number} Returns the sort order indicator for `value`. - */ - function baseCompareAscending(value, other) { - if (value !== other) { - var valIsReflexive = value === value, - othIsReflexive = other === other; - - if (value > other || !valIsReflexive || (value === undefined && othIsReflexive)) { - return 1; - } - if (value < other || !othIsReflexive || (other === undefined && valIsReflexive)) { - return -1; - } - } - return 0; - } - - /** - * The base implementation of `_.findIndex` and `_.findLastIndex` without - * support for callback shorthands and `this` binding. - * - * @private - * @param {Array} array The array to search. - * @param {Function} predicate The function invoked per iteration. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {number} Returns the index of the matched value, else `-1`. - */ - function baseFindIndex(array, predicate, fromRight) { - var length = array.length, - index = fromRight ? length : -1; - - while ((fromRight ? index-- : ++index < length)) { - if (predicate(array[index], index, array)) { - return index; - } - } - return -1; - } - - /** - * The base implementation of `_.indexOf` without support for binary searches. - * - * @private - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {number} fromIndex The index to search from. - * @returns {number} Returns the index of the matched value, else `-1`. - */ - function baseIndexOf(array, value, fromIndex) { - if (value !== value) { - return indexOfNaN(array, fromIndex); - } - var index = fromIndex - 1, - length = array.length; - - while (++index < length) { - if (array[index] === value) { - return index; - } - } - return -1; - } - - /** - * The base implementation of `_.isFunction` without support for environments - * with incorrect `typeof` results. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - */ - function baseIsFunction(value) { - // Avoid a Chakra JIT bug in compatibility modes of IE 11. - // See https://github.com/jashkenas/underscore/issues/1621 for more details. - return typeof value == 'function' || false; - } - - /** - * Converts `value` to a string if it is not one. An empty string is returned - * for `null` or `undefined` values. - * - * @private - * @param {*} value The value to process. - * @returns {string} Returns the string. - */ - function baseToString(value) { - if (typeof value == 'string') { - return value; - } - return value == null ? '' : (value + ''); - } - - /** - * Used by `_.max` and `_.min` as the default callback for string values. - * - * @private - * @param {string} string The string to inspect. - * @returns {number} Returns the code unit of the first character of the string. - */ - function charAtCallback(string) { - return string.charCodeAt(0); - } - - /** - * Used by `_.trim` and `_.trimLeft` to get the index of the first character - * of `string` that is not found in `chars`. - * - * @private - * @param {string} string The string to inspect. - * @param {string} chars The characters to find. - * @returns {number} Returns the index of the first character not found in `chars`. - */ - function charsLeftIndex(string, chars) { - var index = -1, - length = string.length; - - while (++index < length && chars.indexOf(string.charAt(index)) > -1) {} - return index; - } - - /** - * Used by `_.trim` and `_.trimRight` to get the index of the last character - * of `string` that is not found in `chars`. - * - * @private - * @param {string} string The string to inspect. - * @param {string} chars The characters to find. - * @returns {number} Returns the index of the last character not found in `chars`. - */ - function charsRightIndex(string, chars) { - var index = string.length; - - while (index-- && chars.indexOf(string.charAt(index)) > -1) {} - return index; - } - - /** - * Used by `_.sortBy` to compare transformed elements of a collection and stable - * sort them in ascending order. - * - * @private - * @param {Object} object The object to compare to `other`. - * @param {Object} other The object to compare to `object`. - * @returns {number} Returns the sort order indicator for `object`. - */ - function compareAscending(object, other) { - return baseCompareAscending(object.criteria, other.criteria) || (object.index - other.index); - } - - /** - * Used by `_.sortByOrder` to compare multiple properties of each element - * in a collection and stable sort them in the following order: - * - * If `orders` is unspecified, sort in ascending order for all properties. - * Otherwise, for each property, sort in ascending order if its corresponding value in - * orders is true, and descending order if false. - * - * @private - * @param {Object} object The object to compare to `other`. - * @param {Object} other The object to compare to `object`. - * @param {boolean[]} orders The order to sort by for each property. - * @returns {number} Returns the sort order indicator for `object`. - */ - function compareMultiple(object, other, orders) { - var index = -1, - objCriteria = object.criteria, - othCriteria = other.criteria, - length = objCriteria.length, - ordersLength = orders.length; - - while (++index < length) { - var result = baseCompareAscending(objCriteria[index], othCriteria[index]); - if (result) { - if (index >= ordersLength) { - return result; - } - return result * (orders[index] ? 1 : -1); - } - } - // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications - // that causes it, under certain circumstances, to provide the same value for - // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247 - // for more details. - // - // This also ensures a stable sort in V8 and other engines. - // See https://code.google.com/p/v8/issues/detail?id=90 for more details. - return object.index - other.index; - } - - /** - * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters. - * - * @private - * @param {string} letter The matched letter to deburr. - * @returns {string} Returns the deburred letter. - */ - function deburrLetter(letter) { - return deburredLetters[letter]; - } - - /** - * Used by `_.escape` to convert characters to HTML entities. - * - * @private - * @param {string} chr The matched character to escape. - * @returns {string} Returns the escaped character. - */ - function escapeHtmlChar(chr) { - return htmlEscapes[chr]; - } - - /** - * Used by `_.template` to escape characters for inclusion in compiled - * string literals. - * - * @private - * @param {string} chr The matched character to escape. - * @returns {string} Returns the escaped character. - */ - function escapeStringChar(chr) { - return '\\' + stringEscapes[chr]; - } - - /** - * Gets the index at which the first occurrence of `NaN` is found in `array`. - * - * @private - * @param {Array} array The array to search. - * @param {number} fromIndex The index to search from. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {number} Returns the index of the matched `NaN`, else `-1`. - */ - function indexOfNaN(array, fromIndex, fromRight) { - var length = array.length, - index = fromIndex + (fromRight ? 0 : -1); - - while ((fromRight ? index-- : ++index < length)) { - var other = array[index]; - if (other !== other) { - return index; - } - } - return -1; - } - - /** - * Checks if `value` is object-like. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is object-like, else `false`. - */ - function isObjectLike(value) { - return !!value && typeof value == 'object'; - } - - /** - * Used by `trimmedLeftIndex` and `trimmedRightIndex` to determine if a - * character code is whitespace. - * - * @private - * @param {number} charCode The character code to inspect. - * @returns {boolean} Returns `true` if `charCode` is whitespace, else `false`. - */ - function isSpace(charCode) { - return ((charCode <= 160 && (charCode >= 9 && charCode <= 13) || charCode == 32 || charCode == 160) || charCode == 5760 || charCode == 6158 || - (charCode >= 8192 && (charCode <= 8202 || charCode == 8232 || charCode == 8233 || charCode == 8239 || charCode == 8287 || charCode == 12288 || charCode == 65279))); - } - - /** - * Replaces all `placeholder` elements in `array` with an internal placeholder - * and returns an array of their indexes. - * - * @private - * @param {Array} array The array to modify. - * @param {*} placeholder The placeholder to replace. - * @returns {Array} Returns the new array of placeholder indexes. - */ - function replaceHolders(array, placeholder) { - var index = -1, - length = array.length, - resIndex = -1, - result = []; - - while (++index < length) { - if (array[index] === placeholder) { - array[index] = PLACEHOLDER; - result[++resIndex] = index; - } - } - return result; - } - - /** - * An implementation of `_.uniq` optimized for sorted arrays without support - * for callback shorthands and `this` binding. - * - * @private - * @param {Array} array The array to inspect. - * @param {Function} [iteratee] The function invoked per iteration. - * @returns {Array} Returns the new duplicate-value-free array. - */ - function sortedUniq(array, iteratee) { - var seen, - index = -1, - length = array.length, - resIndex = -1, - result = []; - - while (++index < length) { - var value = array[index], - computed = iteratee ? iteratee(value, index, array) : value; - - if (!index || seen !== computed) { - seen = computed; - result[++resIndex] = value; - } - } - return result; - } - - /** - * Used by `_.trim` and `_.trimLeft` to get the index of the first non-whitespace - * character of `string`. - * - * @private - * @param {string} string The string to inspect. - * @returns {number} Returns the index of the first non-whitespace character. - */ - function trimmedLeftIndex(string) { - var index = -1, - length = string.length; - - while (++index < length && isSpace(string.charCodeAt(index))) {} - return index; - } - - /** - * Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace - * character of `string`. - * - * @private - * @param {string} string The string to inspect. - * @returns {number} Returns the index of the last non-whitespace character. - */ - function trimmedRightIndex(string) { - var index = string.length; - - while (index-- && isSpace(string.charCodeAt(index))) {} - return index; - } - - /** - * Used by `_.unescape` to convert HTML entities to characters. - * - * @private - * @param {string} chr The matched character to unescape. - * @returns {string} Returns the unescaped character. - */ - function unescapeHtmlChar(chr) { - return htmlUnescapes[chr]; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Create a new pristine `lodash` function using the given `context` object. - * - * @static - * @memberOf _ - * @category Utility - * @param {Object} [context=root] The context object. - * @returns {Function} Returns a new `lodash` function. - * @example - * - * _.mixin({ 'foo': _.constant('foo') }); - * - * var lodash = _.runInContext(); - * lodash.mixin({ 'bar': lodash.constant('bar') }); - * - * _.isFunction(_.foo); - * // => true - * _.isFunction(_.bar); - * // => false - * - * lodash.isFunction(lodash.foo); - * // => false - * lodash.isFunction(lodash.bar); - * // => true - * - * // using `context` to mock `Date#getTime` use in `_.now` - * var mock = _.runInContext({ - * 'Date': function() { - * return { 'getTime': getTimeMock }; - * } - * }); - * - * // or creating a suped-up `defer` in Node.js - * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer; - */ - function runInContext(context) { - // Avoid issues with some ES3 environments that attempt to use values, named - // after built-in constructors like `Object`, for the creation of literals. - // ES5 clears this up by stating that literals must use built-in constructors. - // See https://es5.github.io/#x11.1.5 for more details. - context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root; - - /** Native constructor references. */ - var Array = context.Array, - Date = context.Date, - Error = context.Error, - Function = context.Function, - Math = context.Math, - Number = context.Number, - Object = context.Object, - RegExp = context.RegExp, - String = context.String, - TypeError = context.TypeError; - - /** Used for native method references. */ - var arrayProto = Array.prototype, - objectProto = Object.prototype, - stringProto = String.prototype; - - /** Used to detect DOM support. */ - var document = (document = context.window) && document.document; - - /** Used to resolve the decompiled source of functions. */ - var fnToString = Function.prototype.toString; - - /** Used to check objects for own properties. */ - var hasOwnProperty = objectProto.hasOwnProperty; - - /** Used to generate unique IDs. */ - var idCounter = 0; - - /** - * Used to resolve the [`toStringTag`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring) - * of values. - */ - var objToString = objectProto.toString; - - /** Used to restore the original `_` reference in `_.noConflict`. */ - var oldDash = context._; - - /** Used to detect if a method is native. */ - var reIsNative = RegExp('^' + - escapeRegExp(objToString) - .replace(/toString|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' - ); - - /** Native method references. */ - var ArrayBuffer = isNative(ArrayBuffer = context.ArrayBuffer) && ArrayBuffer, - bufferSlice = isNative(bufferSlice = ArrayBuffer && new ArrayBuffer(0).slice) && bufferSlice, - ceil = Math.ceil, - clearTimeout = context.clearTimeout, - floor = Math.floor, - getOwnPropertySymbols = isNative(getOwnPropertySymbols = Object.getOwnPropertySymbols) && getOwnPropertySymbols, - getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf, - push = arrayProto.push, - preventExtensions = isNative(Object.preventExtensions = Object.preventExtensions) && preventExtensions, - propertyIsEnumerable = objectProto.propertyIsEnumerable, - Set = isNative(Set = context.Set) && Set, - setTimeout = context.setTimeout, - splice = arrayProto.splice, - Uint8Array = isNative(Uint8Array = context.Uint8Array) && Uint8Array, - WeakMap = isNative(WeakMap = context.WeakMap) && WeakMap; - - /** Used to clone array buffers. */ - var Float64Array = (function() { - // Safari 5 errors when using an array buffer to initialize a typed array - // where the array buffer's `byteLength` is not a multiple of the typed - // array's `BYTES_PER_ELEMENT`. - try { - var func = isNative(func = context.Float64Array) && func, - result = new func(new ArrayBuffer(10), 0, 1) && func; - } catch(e) {} - return result; - }()); - - /** Used as `baseAssign`. */ - var nativeAssign = (function() { - // Avoid `Object.assign` in Firefox 34-37 which have an early implementation - // with a now defunct try/catch behavior. See https://bugzilla.mozilla.org/show_bug.cgi?id=1103344 - // for more details. - // - // Use `Object.preventExtensions` on a plain object instead of simply using - // `Object('x')` because Chrome and IE fail to throw an error when attempting - // to assign values to readonly indexes of strings in strict mode. - var object = { '1': 0 }, - func = preventExtensions && isNative(func = Object.assign) && func; - - try { func(preventExtensions(object), 'xo'); } catch(e) {} - return !object[1] && func; - }()); - - /* Native method references for those with the same name as other `lodash` methods. */ - var nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray, - nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate, - nativeIsFinite = context.isFinite, - nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys, - nativeMax = Math.max, - nativeMin = Math.min, - nativeNow = isNative(nativeNow = Date.now) && nativeNow, - nativeNumIsFinite = isNative(nativeNumIsFinite = Number.isFinite) && nativeNumIsFinite, - nativeParseInt = context.parseInt, - nativeRandom = Math.random; - - /** Used as references for `-Infinity` and `Infinity`. */ - var NEGATIVE_INFINITY = Number.NEGATIVE_INFINITY, - POSITIVE_INFINITY = Number.POSITIVE_INFINITY; - - /** Used as references for the maximum length and index of an array. */ - var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1, - MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1, - HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1; - - /** Used as the size, in bytes, of each `Float64Array` element. */ - var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0; - - /** - * Used as the [maximum length](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer) - * of an array-like value. - */ - var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1; - - /** Used to store function metadata. */ - var metaMap = WeakMap && new WeakMap; - - /** Used to lookup unminified function names. */ - var realNames = {}; - - /*------------------------------------------------------------------------*/ - - /** - * Creates a `lodash` object which wraps `value` to enable implicit chaining. - * Methods that operate on and return arrays, collections, and functions can - * be chained together. Methods that return a boolean or single value will - * automatically end the chain returning the unwrapped value. Explicit chaining - * may be enabled using `_.chain`. The execution of chained methods is lazy, - * that is, execution is deferred until `_#value` is implicitly or explicitly - * called. - * - * Lazy evaluation allows several methods to support shortcut fusion. Shortcut - * fusion is an optimization that merges iteratees to avoid creating intermediate - * arrays and reduce the number of iteratee executions. - * - * Chaining is supported in custom builds as long as the `_#value` method is - * directly or indirectly included in the build. - * - * In addition to lodash methods, wrappers have `Array` and `String` methods. - * - * The wrapper `Array` methods are: - * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, - * `splice`, and `unshift` - * - * The wrapper `String` methods are: - * `replace` and `split` - * - * The wrapper methods that support shortcut fusion are: - * `compact`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`, - * `first`, `initial`, `last`, `map`, `pluck`, `reject`, `rest`, `reverse`, - * `slice`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `toArray`, - * and `where` - * - * The chainable wrapper methods are: - * `after`, `ary`, `assign`, `at`, `before`, `bind`, `bindAll`, `bindKey`, - * `callback`, `chain`, `chunk`, `commit`, `compact`, `concat`, `constant`, - * `countBy`, `create`, `curry`, `debounce`, `defaults`, `defer`, `delay`, - * `difference`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `fill`, - * `filter`, `flatten`, `flattenDeep`, `flow`, `flowRight`, `forEach`, - * `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `functions`, - * `groupBy`, `indexBy`, `initial`, `intersection`, `invert`, `invoke`, `keys`, - * `keysIn`, `map`, `mapValues`, `matches`, `matchesProperty`, `memoize`, - * `merge`, `mixin`, `negate`, `omit`, `once`, `pairs`, `partial`, `partialRight`, - * `partition`, `pick`, `plant`, `pluck`, `property`, `propertyOf`, `pull`, - * `pullAt`, `push`, `range`, `rearg`, `reject`, `remove`, `rest`, `reverse`, - * `shuffle`, `slice`, `sort`, `sortBy`, `sortByAll`, `sortByOrder`, `splice`, - * `spread`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, - * `throttle`, `thru`, `times`, `toArray`, `toPlainObject`, `transform`, - * `union`, `uniq`, `unshift`, `unzip`, `values`, `valuesIn`, `where`, - * `without`, `wrap`, `xor`, `zip`, and `zipObject` - * - * The wrapper methods that are **not** chainable by default are: - * `add`, `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `deburr`, - * `endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, - * `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `has`, - * `identity`, `includes`, `indexOf`, `inRange`, `isArguments`, `isArray`, - * `isBoolean`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isError`, `isFinite` - * `isFunction`, `isMatch`, `isNative`, `isNaN`, `isNull`, `isNumber`, `isObject`, - * `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `isTypedArray`, - * `join`, `kebabCase`, `last`, `lastIndexOf`, `max`, `min`, `noConflict`, - * `noop`, `now`, `pad`, `padLeft`, `padRight`, `parseInt`, `pop`, `random`, - * `reduce`, `reduceRight`, `repeat`, `result`, `runInContext`, `shift`, `size`, - * `snakeCase`, `some`, `sortedIndex`, `sortedLastIndex`, `startCase`, `startsWith`, - * `sum`, `template`, `trim`, `trimLeft`, `trimRight`, `trunc`, `unescape`, - * `uniqueId`, `value`, and `words` - * - * The wrapper method `sample` will return a wrapped value when `n` is provided, - * otherwise an unwrapped value is returned. - * - * @name _ - * @constructor - * @category Chain - * @param {*} value The value to wrap in a `lodash` instance. - * @returns {Object} Returns the new `lodash` wrapper instance. - * @example - * - * var wrapped = _([1, 2, 3]); - * - * // returns an unwrapped value - * wrapped.reduce(function(total, n) { - * return total + n; - * }); - * // => 6 - * - * // returns a wrapped value - * var squares = wrapped.map(function(n) { - * return n * n; - * }); - * - * _.isArray(squares); - * // => false - * - * _.isArray(squares.value()); - * // => true - */ - function lodash(value) { - if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) { - if (value instanceof LodashWrapper) { - return value; - } - if (hasOwnProperty.call(value, '__chain__') && hasOwnProperty.call(value, '__wrapped__')) { - return wrapperClone(value); - } - } - return new LodashWrapper(value); - } - - /** - * The function whose prototype all chaining wrappers inherit from. - * - * @private - */ - function baseLodash() { - // No operation performed. - } - - /** - * The base constructor for creating `lodash` wrapper objects. - * - * @private - * @param {*} value The value to wrap. - * @param {boolean} [chainAll] Enable chaining for all wrapper methods. - * @param {Array} [actions=[]] Actions to peform to resolve the unwrapped value. - */ - function LodashWrapper(value, chainAll, actions) { - this.__wrapped__ = value; - this.__actions__ = actions || []; - this.__chain__ = !!chainAll; - } - - /** - * An object environment feature flags. - * - * @static - * @memberOf _ - * @type Object - */ - var support = lodash.support = {}; - - (function(x) { - var Ctor = function() { this.x = x; }, - object = { '0': x, 'length': x }, - props = []; - - Ctor.prototype = { 'valueOf': x, 'y': x }; - for (var key in new Ctor) { props.push(key); } - - /** - * Detect if functions can be decompiled by `Function#toString` - * (all but Firefox OS certified apps, older Opera mobile browsers, and - * the PlayStation 3; forced `false` for Windows 8 apps). - * - * @memberOf _.support - * @type boolean - */ - support.funcDecomp = /\bthis\b/.test(function() { return this; }); - - /** - * Detect if `Function#name` is supported (all but IE). - * - * @memberOf _.support - * @type boolean - */ - support.funcNames = typeof Function.name == 'string'; - - /** - * Detect if the DOM is supported. - * - * @memberOf _.support - * @type boolean - */ - try { - support.dom = document.createDocumentFragment().nodeType === 11; - } catch(e) { - support.dom = false; - } - - /** - * Detect if `arguments` object indexes are non-enumerable. - * - * In Firefox < 4, IE < 9, PhantomJS, and Safari < 5.1 `arguments` object - * indexes are non-enumerable. Chrome < 25 and Node.js < 0.11.0 treat - * `arguments` object indexes as non-enumerable and fail `hasOwnProperty` - * checks for indexes that exceed the number of function parameters and - * whose associated argument values are `0`. - * - * @memberOf _.support - * @type boolean - */ - try { - support.nonEnumArgs = !propertyIsEnumerable.call(arguments, 1); - } catch(e) { - support.nonEnumArgs = true; - } - }(1, 0)); - - /** - * By default, the template delimiters used by lodash are like those in - * embedded Ruby (ERB). Change the following template settings to use - * alternative delimiters. - * - * @static - * @memberOf _ - * @type Object - */ - lodash.templateSettings = { - - /** - * Used to detect `data` property values to be HTML-escaped. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'escape': reEscape, - - /** - * Used to detect code to be evaluated. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'evaluate': reEvaluate, - - /** - * Used to detect `data` property values to inject. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'interpolate': reInterpolate, - - /** - * Used to reference the data object in the template text. - * - * @memberOf _.templateSettings - * @type string - */ - 'variable': '', - - /** - * Used to import variables into the compiled template. - * - * @memberOf _.templateSettings - * @type Object - */ - 'imports': { - - /** - * A reference to the `lodash` function. - * - * @memberOf _.templateSettings.imports - * @type Function - */ - '_': lodash - } - }; - - /*------------------------------------------------------------------------*/ - - /** - * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation. - * - * @private - * @param {*} value The value to wrap. - */ - function LazyWrapper(value) { - this.__wrapped__ = value; - this.__actions__ = null; - this.__dir__ = 1; - this.__dropCount__ = 0; - this.__filtered__ = false; - this.__iteratees__ = null; - this.__takeCount__ = POSITIVE_INFINITY; - this.__views__ = null; - } - - /** - * Creates a clone of the lazy wrapper object. - * - * @private - * @name clone - * @memberOf LazyWrapper - * @returns {Object} Returns the cloned `LazyWrapper` object. - */ - function lazyClone() { - var actions = this.__actions__, - iteratees = this.__iteratees__, - views = this.__views__, - result = new LazyWrapper(this.__wrapped__); - - result.__actions__ = actions ? arrayCopy(actions) : null; - result.__dir__ = this.__dir__; - result.__filtered__ = this.__filtered__; - result.__iteratees__ = iteratees ? arrayCopy(iteratees) : null; - result.__takeCount__ = this.__takeCount__; - result.__views__ = views ? arrayCopy(views) : null; - return result; - } - - /** - * Reverses the direction of lazy iteration. - * - * @private - * @name reverse - * @memberOf LazyWrapper - * @returns {Object} Returns the new reversed `LazyWrapper` object. - */ - function lazyReverse() { - if (this.__filtered__) { - var result = new LazyWrapper(this); - result.__dir__ = -1; - result.__filtered__ = true; - } else { - result = this.clone(); - result.__dir__ *= -1; - } - return result; - } - - /** - * Extracts the unwrapped value from its lazy wrapper. - * - * @private - * @name value - * @memberOf LazyWrapper - * @returns {*} Returns the unwrapped value. - */ - function lazyValue() { - var array = this.__wrapped__.value(); - if (!isArray(array)) { - return baseWrapperValue(array, this.__actions__); - } - var dir = this.__dir__, - isRight = dir < 0, - view = getView(0, array.length, this.__views__), - start = view.start, - end = view.end, - length = end - start, - index = isRight ? end : (start - 1), - takeCount = nativeMin(length, this.__takeCount__), - iteratees = this.__iteratees__, - iterLength = iteratees ? iteratees.length : 0, - resIndex = 0, - result = []; - - outer: - while (length-- && resIndex < takeCount) { - index += dir; - - var iterIndex = -1, - value = array[index]; - - while (++iterIndex < iterLength) { - var data = iteratees[iterIndex], - iteratee = data.iteratee, - type = data.type; - - if (type == LAZY_DROP_WHILE_FLAG) { - if (data.done && (isRight ? (index > data.index) : (index < data.index))) { - data.count = 0; - data.done = false; - } - data.index = index; - if (!data.done) { - var limit = data.limit; - if (!(data.done = limit > -1 ? (data.count++ >= limit) : !iteratee(value))) { - continue outer; - } - } - } else { - var computed = iteratee(value); - if (type == LAZY_MAP_FLAG) { - value = computed; - } else if (!computed) { - if (type == LAZY_FILTER_FLAG) { - continue outer; - } else { - break outer; - } - } - } - } - result[resIndex++] = value; - } - return result; - } - - /*------------------------------------------------------------------------*/ - - /** - * Creates a cache object to store key/value pairs. - * - * @private - * @static - * @name Cache - * @memberOf _.memoize - */ - function MapCache() { - this.__data__ = {}; - } - - /** - * Removes `key` and its value from the cache. - * - * @private - * @name delete - * @memberOf _.memoize.Cache - * @param {string} key The key of the value to remove. - * @returns {boolean} Returns `true` if the entry was removed successfully, else `false`. - */ - function mapDelete(key) { - return this.has(key) && delete this.__data__[key]; - } - - /** - * Gets the cached value for `key`. - * - * @private - * @name get - * @memberOf _.memoize.Cache - * @param {string} key The key of the value to get. - * @returns {*} Returns the cached value. - */ - function mapGet(key) { - return key == '__proto__' ? undefined : this.__data__[key]; - } - - /** - * Checks if a cached value for `key` exists. - * - * @private - * @name has - * @memberOf _.memoize.Cache - * @param {string} key The key of the entry to check. - * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`. - */ - function mapHas(key) { - return key != '__proto__' && hasOwnProperty.call(this.__data__, key); - } - - /** - * Sets `value` to `key` of the cache. - * - * @private - * @name set - * @memberOf _.memoize.Cache - * @param {string} key The key of the value to cache. - * @param {*} value The value to cache. - * @returns {Object} Returns the cache object. - */ - function mapSet(key, value) { - if (key != '__proto__') { - this.__data__[key] = value; - } - return this; - } - - /*------------------------------------------------------------------------*/ - - /** - * - * Creates a cache object to store unique values. - * - * @private - * @param {Array} [values] The values to cache. - */ - function SetCache(values) { - var length = values ? values.length : 0; - - this.data = { 'hash': nativeCreate(null), 'set': new Set }; - while (length--) { - this.push(values[length]); - } - } - - /** - * Checks if `value` is in `cache` mimicking the return signature of - * `_.indexOf` by returning `0` if the value is found, else `-1`. - * - * @private - * @param {Object} cache The cache to search. - * @param {*} value The value to search for. - * @returns {number} Returns `0` if `value` is found, else `-1`. - */ - function cacheIndexOf(cache, value) { - var data = cache.data, - result = (typeof value == 'string' || isObject(value)) ? data.set.has(value) : data.hash[value]; - - return result ? 0 : -1; - } - - /** - * Adds `value` to the cache. - * - * @private - * @name push - * @memberOf SetCache - * @param {*} value The value to cache. - */ - function cachePush(value) { - var data = this.data; - if (typeof value == 'string' || isObject(value)) { - data.set.add(value); - } else { - data.hash[value] = true; - } - } - - /*------------------------------------------------------------------------*/ - - /** - * Copies the values of `source` to `array`. - * - * @private - * @param {Array} source The array to copy values from. - * @param {Array} [array=[]] The array to copy values to. - * @returns {Array} Returns `array`. - */ - function arrayCopy(source, array) { - var index = -1, - length = source.length; - - array || (array = Array(length)); - while (++index < length) { - array[index] = source[index]; - } - return array; - } - - /** - * A specialized version of `_.forEach` for arrays without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns `array`. - */ - function arrayEach(array, iteratee) { - var index = -1, - length = array.length; - - while (++index < length) { - if (iteratee(array[index], index, array) === false) { - break; - } - } - return array; - } - - /** - * A specialized version of `_.forEachRight` for arrays without support for - * callback shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns `array`. - */ - function arrayEachRight(array, iteratee) { - var length = array.length; - - while (length--) { - if (iteratee(array[length], length, array) === false) { - break; - } - } - return array; - } - - /** - * A specialized version of `_.every` for arrays without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} predicate The function invoked per iteration. - * @returns {boolean} Returns `true` if all elements pass the predicate check, - * else `false`. - */ - function arrayEvery(array, predicate) { - var index = -1, - length = array.length; - - while (++index < length) { - if (!predicate(array[index], index, array)) { - return false; - } - } - return true; - } - - /** - * A specialized version of `_.filter` for arrays without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} predicate The function invoked per iteration. - * @returns {Array} Returns the new filtered array. - */ - function arrayFilter(array, predicate) { - var index = -1, - length = array.length, - resIndex = -1, - result = []; - - while (++index < length) { - var value = array[index]; - if (predicate(value, index, array)) { - result[++resIndex] = value; - } - } - return result; - } - - /** - * A specialized version of `_.map` for arrays without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns the new mapped array. - */ - function arrayMap(array, iteratee) { - var index = -1, - length = array.length, - result = Array(length); - - while (++index < length) { - result[index] = iteratee(array[index], index, array); - } - return result; - } - - /** - * A specialized version of `_.max` for arrays without support for iteratees. - * - * @private - * @param {Array} array The array to iterate over. - * @returns {*} Returns the maximum value. - */ - function arrayMax(array) { - var index = -1, - length = array.length, - result = NEGATIVE_INFINITY; - - while (++index < length) { - var value = array[index]; - if (value > result) { - result = value; - } - } - return result; - } - - /** - * A specialized version of `_.min` for arrays without support for iteratees. - * - * @private - * @param {Array} array The array to iterate over. - * @returns {*} Returns the minimum value. - */ - function arrayMin(array) { - var index = -1, - length = array.length, - result = POSITIVE_INFINITY; - - while (++index < length) { - var value = array[index]; - if (value < result) { - result = value; - } - } - return result; - } - - /** - * A specialized version of `_.reduce` for arrays without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {*} [accumulator] The initial value. - * @param {boolean} [initFromArray] Specify using the first element of `array` - * as the initial value. - * @returns {*} Returns the accumulated value. - */ - function arrayReduce(array, iteratee, accumulator, initFromArray) { - var index = -1, - length = array.length; - - if (initFromArray && length) { - accumulator = array[++index]; - } - while (++index < length) { - accumulator = iteratee(accumulator, array[index], index, array); - } - return accumulator; - } - - /** - * A specialized version of `_.reduceRight` for arrays without support for - * callback shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {*} [accumulator] The initial value. - * @param {boolean} [initFromArray] Specify using the last element of `array` - * as the initial value. - * @returns {*} Returns the accumulated value. - */ - function arrayReduceRight(array, iteratee, accumulator, initFromArray) { - var length = array.length; - if (initFromArray && length) { - accumulator = array[--length]; - } - while (length--) { - accumulator = iteratee(accumulator, array[length], length, array); - } - return accumulator; - } - - /** - * A specialized version of `_.some` for arrays without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array} array The array to iterate over. - * @param {Function} predicate The function invoked per iteration. - * @returns {boolean} Returns `true` if any element passes the predicate check, - * else `false`. - */ - function arraySome(array, predicate) { - var index = -1, - length = array.length; - - while (++index < length) { - if (predicate(array[index], index, array)) { - return true; - } - } - return false; - } - - /** - * A specialized version of `_.sum` for arrays without support for iteratees. - * - * @private - * @param {Array} array The array to iterate over. - * @returns {number} Returns the sum. - */ - function arraySum(array) { - var length = array.length, - result = 0; - - while (length--) { - result += +array[length] || 0; - } - return result; - } - - /** - * Used by `_.defaults` to customize its `_.assign` use. - * - * @private - * @param {*} objectValue The destination object property value. - * @param {*} sourceValue The source object property value. - * @returns {*} Returns the value to assign to the destination object. - */ - function assignDefaults(objectValue, sourceValue) { - return objectValue === undefined ? sourceValue : objectValue; - } - - /** - * Used by `_.template` to customize its `_.assign` use. - * - * **Note:** This function is like `assignDefaults` except that it ignores - * inherited property values when checking if a property is `undefined`. - * - * @private - * @param {*} objectValue The destination object property value. - * @param {*} sourceValue The source object property value. - * @param {string} key The key associated with the object and source values. - * @param {Object} object The destination object. - * @returns {*} Returns the value to assign to the destination object. - */ - function assignOwnDefaults(objectValue, sourceValue, key, object) { - return (objectValue === undefined || !hasOwnProperty.call(object, key)) - ? sourceValue - : objectValue; - } - - /** - * A specialized version of `_.assign` for customizing assigned values without - * support for argument juggling, multiple sources, and `this` binding `customizer` - * functions. - * - * @private - * @param {Object} object The destination object. - * @param {Object} source The source object. - * @param {Function} customizer The function to customize assigned values. - * @returns {Object} Returns `object`. - */ - function assignWith(object, source, customizer) { - var props = keys(source); - push.apply(props, getSymbols(source)); - - var index = -1, - length = props.length; - - while (++index < length) { - var key = props[index], - value = object[key], - result = customizer(value, source[key], key, object, source); - - if ((result === result ? (result !== value) : (value === value)) || - (value === undefined && !(key in object))) { - object[key] = result; - } - } - return object; - } - - /** - * The base implementation of `_.assign` without support for argument juggling, - * multiple sources, and `customizer` functions. - * - * @private - * @param {Object} object The destination object. - * @param {Object} source The source object. - * @returns {Object} Returns `object`. - */ - var baseAssign = nativeAssign || function(object, source) { - return source == null - ? object - : baseCopy(source, getSymbols(source), baseCopy(source, keys(source), object)); - }; - - /** - * The base implementation of `_.at` without support for string collections - * and individual key arguments. - * - * @private - * @param {Array|Object} collection The collection to iterate over. - * @param {number[]|string[]} props The property names or indexes of elements to pick. - * @returns {Array} Returns the new array of picked elements. - */ - function baseAt(collection, props) { - var index = -1, - length = collection.length, - isArr = isLength(length), - propsLength = props.length, - result = Array(propsLength); - - while(++index < propsLength) { - var key = props[index]; - if (isArr) { - result[index] = isIndex(key, length) ? collection[key] : undefined; - } else { - result[index] = collection[key]; - } - } - return result; - } - - /** - * Copies properties of `source` to `object`. - * - * @private - * @param {Object} source The object to copy properties from. - * @param {Array} props The property names to copy. - * @param {Object} [object={}] The object to copy properties to. - * @returns {Object} Returns `object`. - */ - function baseCopy(source, props, object) { - object || (object = {}); - - var index = -1, - length = props.length; - - while (++index < length) { - var key = props[index]; - object[key] = source[key]; - } - return object; - } - - /** - * The base implementation of `_.callback` which supports specifying the - * number of arguments to provide to `func`. - * - * @private - * @param {*} [func=_.identity] The value to convert to a callback. - * @param {*} [thisArg] The `this` binding of `func`. - * @param {number} [argCount] The number of arguments to provide to `func`. - * @returns {Function} Returns the callback. - */ - function baseCallback(func, thisArg, argCount) { - var type = typeof func; - if (type == 'function') { - return thisArg === undefined - ? func - : bindCallback(func, thisArg, argCount); - } - if (func == null) { - return identity; - } - if (type == 'object') { - return baseMatches(func); - } - return thisArg === undefined - ? property(func) - : baseMatchesProperty(func, thisArg); - } - - /** - * The base implementation of `_.clone` without support for argument juggling - * and `this` binding `customizer` functions. - * - * @private - * @param {*} value The value to clone. - * @param {boolean} [isDeep] Specify a deep clone. - * @param {Function} [customizer] The function to customize cloning values. - * @param {string} [key] The key of `value`. - * @param {Object} [object] The object `value` belongs to. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates clones with source counterparts. - * @returns {*} Returns the cloned value. - */ - function baseClone(value, isDeep, customizer, key, object, stackA, stackB) { - var result; - if (customizer) { - result = object ? customizer(value, key, object) : customizer(value); - } - if (result !== undefined) { - return result; - } - if (!isObject(value)) { - return value; - } - var isArr = isArray(value); - if (isArr) { - result = initCloneArray(value); - if (!isDeep) { - return arrayCopy(value, result); - } - } else { - var tag = objToString.call(value), - isFunc = tag == funcTag; - - if (tag == objectTag || tag == argsTag || (isFunc && !object)) { - result = initCloneObject(isFunc ? {} : value); - if (!isDeep) { - return baseAssign(result, value); - } - } else { - return cloneableTags[tag] - ? initCloneByTag(value, tag, isDeep) - : (object ? value : {}); - } - } - // Check for circular references and return corresponding clone. - stackA || (stackA = []); - stackB || (stackB = []); - - var length = stackA.length; - while (length--) { - if (stackA[length] == value) { - return stackB[length]; - } - } - // Add the source value to the stack of traversed objects and associate it with its clone. - stackA.push(value); - stackB.push(result); - - // Recursively populate clone (susceptible to call stack limits). - (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) { - result[key] = baseClone(subValue, isDeep, customizer, key, value, stackA, stackB); - }); - return result; - } - - /** - * The base implementation of `_.create` without support for assigning - * properties to the created object. - * - * @private - * @param {Object} prototype The object to inherit from. - * @returns {Object} Returns the new object. - */ - var baseCreate = (function() { - function Object() {} - return function(prototype) { - if (isObject(prototype)) { - Object.prototype = prototype; - var result = new Object; - Object.prototype = null; - } - return result || context.Object(); - }; - }()); - - /** - * The base implementation of `_.delay` and `_.defer` which accepts an index - * of where to slice the arguments to provide to `func`. - * - * @private - * @param {Function} func The function to delay. - * @param {number} wait The number of milliseconds to delay invocation. - * @param {Object} args The arguments provide to `func`. - * @returns {number} Returns the timer id. - */ - function baseDelay(func, wait, args) { - if (typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - return setTimeout(function() { func.apply(undefined, args); }, wait); - } - - /** - * The base implementation of `_.difference` which accepts a single array - * of values to exclude. - * - * @private - * @param {Array} array The array to inspect. - * @param {Array} values The values to exclude. - * @returns {Array} Returns the new array of filtered values. - */ - function baseDifference(array, values) { - var length = array ? array.length : 0, - result = []; - - if (!length) { - return result; - } - var index = -1, - indexOf = getIndexOf(), - isCommon = indexOf == baseIndexOf, - cache = (isCommon && values.length >= 200) ? createCache(values) : null, - valuesLength = values.length; - - if (cache) { - indexOf = cacheIndexOf; - isCommon = false; - values = cache; - } - outer: - while (++index < length) { - var value = array[index]; - - if (isCommon && value === value) { - var valuesIndex = valuesLength; - while (valuesIndex--) { - if (values[valuesIndex] === value) { - continue outer; - } - } - result.push(value); - } - else if (indexOf(values, value, 0) < 0) { - result.push(value); - } - } - return result; - } - - /** - * The base implementation of `_.forEach` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array|Object|string} Returns `collection`. - */ - var baseEach = createBaseEach(baseForOwn); - - /** - * The base implementation of `_.forEachRight` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array|Object|string} Returns `collection`. - */ - var baseEachRight = createBaseEach(baseForOwnRight, true); - - /** - * The base implementation of `_.every` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} predicate The function invoked per iteration. - * @returns {boolean} Returns `true` if all elements pass the predicate check, - * else `false` - */ - function baseEvery(collection, predicate) { - var result = true; - baseEach(collection, function(value, index, collection) { - result = !!predicate(value, index, collection); - return result; - }); - return result; - } - - /** - * The base implementation of `_.fill` without an iteratee call guard. - * - * @private - * @param {Array} array The array to fill. - * @param {*} value The value to fill `array` with. - * @param {number} [start=0] The start position. - * @param {number} [end=array.length] The end position. - * @returns {Array} Returns `array`. - */ - function baseFill(array, value, start, end) { - var length = array.length; - - start = start == null ? 0 : (+start || 0); - if (start < 0) { - start = -start > length ? 0 : (length + start); - } - end = (end === undefined || end > length) ? length : (+end || 0); - if (end < 0) { - end += length; - } - length = start > end ? 0 : (end >>> 0); - start >>>= 0; - - while (start < length) { - array[start++] = value; - } - return array; - } - - /** - * The base implementation of `_.filter` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} predicate The function invoked per iteration. - * @returns {Array} Returns the new filtered array. - */ - function baseFilter(collection, predicate) { - var result = []; - baseEach(collection, function(value, index, collection) { - if (predicate(value, index, collection)) { - result.push(value); - } - }); - return result; - } - - /** - * The base implementation of `_.find`, `_.findLast`, `_.findKey`, and `_.findLastKey`, - * without support for callback shorthands and `this` binding, which iterates - * over `collection` using the provided `eachFunc`. - * - * @private - * @param {Array|Object|string} collection The collection to search. - * @param {Function} predicate The function invoked per iteration. - * @param {Function} eachFunc The function to iterate over `collection`. - * @param {boolean} [retKey] Specify returning the key of the found element - * instead of the element itself. - * @returns {*} Returns the found element or its key, else `undefined`. - */ - function baseFind(collection, predicate, eachFunc, retKey) { - var result; - eachFunc(collection, function(value, key, collection) { - if (predicate(value, key, collection)) { - result = retKey ? key : value; - return false; - } - }); - return result; - } - - /** - * The base implementation of `_.flatten` with added support for restricting - * flattening and specifying the start index. - * - * @private - * @param {Array} array The array to flatten. - * @param {boolean} isDeep Specify a deep flatten. - * @param {boolean} isStrict Restrict flattening to arrays and `arguments` objects. - * @returns {Array} Returns the new flattened array. - */ - function baseFlatten(array, isDeep, isStrict) { - var index = -1, - length = array.length, - resIndex = -1, - result = []; - - while (++index < length) { - var value = array[index]; - - if (isObjectLike(value) && isLength(value.length) && (isArray(value) || isArguments(value))) { - if (isDeep) { - // Recursively flatten arrays (susceptible to call stack limits). - value = baseFlatten(value, isDeep, isStrict); - } - var valIndex = -1, - valLength = value.length; - - result.length += valLength; - while (++valIndex < valLength) { - result[++resIndex] = value[valIndex]; - } - } else if (!isStrict) { - result[++resIndex] = value; - } - } - return result; - } - - /** - * The base implementation of `baseForIn` and `baseForOwn` which iterates - * over `object` properties returned by `keysFunc` invoking `iteratee` for - * each property. Iteratee functions may exit iteration early by explicitly - * returning `false`. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {Function} keysFunc The function to get the keys of `object`. - * @returns {Object} Returns `object`. - */ - var baseFor = createBaseFor(); - - /** - * This function is like `baseFor` except that it iterates over properties - * in the opposite order. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {Function} keysFunc The function to get the keys of `object`. - * @returns {Object} Returns `object`. - */ - var baseForRight = createBaseFor(true); - - /** - * The base implementation of `_.forIn` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Object} Returns `object`. - */ - function baseForIn(object, iteratee) { - return baseFor(object, iteratee, keysIn); - } - - /** - * The base implementation of `_.forOwn` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Object} Returns `object`. - */ - function baseForOwn(object, iteratee) { - return baseFor(object, iteratee, keys); - } - - /** - * The base implementation of `_.forOwnRight` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Object} object The object to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Object} Returns `object`. - */ - function baseForOwnRight(object, iteratee) { - return baseForRight(object, iteratee, keys); - } - - /** - * The base implementation of `_.functions` which creates an array of - * `object` function property names filtered from those provided. - * - * @private - * @param {Object} object The object to inspect. - * @param {Array} props The property names to filter. - * @returns {Array} Returns the new array of filtered property names. - */ - function baseFunctions(object, props) { - var index = -1, - length = props.length, - resIndex = -1, - result = []; - - while (++index < length) { - var key = props[index]; - if (isFunction(object[key])) { - result[++resIndex] = key; - } - } - return result; - } - - /** - * The base implementation of `get` without support for string paths - * and default values. - * - * @private - * @param {Object} object The object to query. - * @param {Array} path The path of the property to get. - * @param {string} [pathKey] The key representation of path. - * @returns {*} Returns the resolved value. - */ - function baseGet(object, path, pathKey) { - if (object == null) { - return; - } - if (pathKey !== undefined && pathKey in toObject(object)) { - path = [pathKey]; - } - var index = -1, - length = path.length; - - while (object != null && ++index < length) { - var result = object = object[path[index]]; - } - return result; - } - - /** - * The base implementation of `_.isEqual` without support for `this` binding - * `customizer` functions. - * - * @private - * @param {*} value The value to compare. - * @param {*} other The other value to compare. - * @param {Function} [customizer] The function to customize comparing values. - * @param {boolean} [isLoose] Specify performing partial comparisons. - * @param {Array} [stackA] Tracks traversed `value` objects. - * @param {Array} [stackB] Tracks traversed `other` objects. - * @returns {boolean} Returns `true` if the values are equivalent, else `false`. - */ - function baseIsEqual(value, other, customizer, isLoose, stackA, stackB) { - // Exit early for identical values. - if (value === other) { - // Treat `+0` vs. `-0` as not equal. - return value !== 0 || (1 / value == 1 / other); - } - var valType = typeof value, - othType = typeof other; - - // Exit early for unlike primitive values. - if ((valType != 'function' && valType != 'object' && othType != 'function' && othType != 'object') || - value == null || other == null) { - // Return `false` unless both values are `NaN`. - return value !== value && other !== other; - } - return baseIsEqualDeep(value, other, baseIsEqual, customizer, isLoose, stackA, stackB); - } - - /** - * A specialized version of `baseIsEqual` for arrays and objects which performs - * deep comparisons and tracks traversed objects enabling objects with circular - * references to be compared. - * - * @private - * @param {Object} object The object to compare. - * @param {Object} other The other object to compare. - * @param {Function} equalFunc The function to determine equivalents of values. - * @param {Function} [customizer] The function to customize comparing objects. - * @param {boolean} [isLoose] Specify performing partial comparisons. - * @param {Array} [stackA=[]] Tracks traversed `value` objects. - * @param {Array} [stackB=[]] Tracks traversed `other` objects. - * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. - */ - function baseIsEqualDeep(object, other, equalFunc, customizer, isLoose, stackA, stackB) { - var objIsArr = isArray(object), - othIsArr = isArray(other), - objTag = arrayTag, - othTag = arrayTag; - - if (!objIsArr) { - objTag = objToString.call(object); - if (objTag == argsTag) { - objTag = objectTag; - } else if (objTag != objectTag) { - objIsArr = isTypedArray(object); - } - } - if (!othIsArr) { - othTag = objToString.call(other); - if (othTag == argsTag) { - othTag = objectTag; - } else if (othTag != objectTag) { - othIsArr = isTypedArray(other); - } - } - var objIsObj = objTag == objectTag, - othIsObj = othTag == objectTag, - isSameTag = objTag == othTag; - - if (isSameTag && !(objIsArr || objIsObj)) { - return equalByTag(object, other, objTag); - } - if (!isLoose) { - var valWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), - othWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); - - if (valWrapped || othWrapped) { - return equalFunc(valWrapped ? object.value() : object, othWrapped ? other.value() : other, customizer, isLoose, stackA, stackB); - } - } - if (!isSameTag) { - return false; - } - // Assume cyclic values are equal. - // For more information on detecting circular references see https://es5.github.io/#JO. - stackA || (stackA = []); - stackB || (stackB = []); - - var length = stackA.length; - while (length--) { - if (stackA[length] == object) { - return stackB[length] == other; - } - } - // Add `object` and `other` to the stack of traversed objects. - stackA.push(object); - stackB.push(other); - - var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, isLoose, stackA, stackB); - - stackA.pop(); - stackB.pop(); - - return result; - } - - /** - * The base implementation of `_.isMatch` without support for callback - * shorthands and `this` binding. - * - * @private - * @param {Object} object The object to inspect. - * @param {Array} props The source property names to match. - * @param {Array} values The source values to match. - * @param {Array} strictCompareFlags Strict comparison flags for source values. - * @param {Function} [customizer] The function to customize comparing objects. - * @returns {boolean} Returns `true` if `object` is a match, else `false`. - */ - function baseIsMatch(object, props, values, strictCompareFlags, customizer) { - var index = -1, - length = props.length, - noCustomizer = !customizer; - - while (++index < length) { - if ((noCustomizer && strictCompareFlags[index]) - ? values[index] !== object[props[index]] - : !(props[index] in object) - ) { - return false; - } - } - index = -1; - while (++index < length) { - var key = props[index], - objValue = object[key], - srcValue = values[index]; - - if (noCustomizer && strictCompareFlags[index]) { - var result = objValue !== undefined || (key in object); - } else { - result = customizer ? customizer(objValue, srcValue, key) : undefined; - if (result === undefined) { - result = baseIsEqual(srcValue, objValue, customizer, true); - } - } - if (!result) { - return false; - } - } - return true; - } - - /** - * The base implementation of `_.map` without support for callback shorthands - * and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {Array} Returns the new mapped array. - */ - function baseMap(collection, iteratee) { - var index = -1, - length = getLength(collection), - result = isLength(length) ? Array(length) : []; - - baseEach(collection, function(value, key, collection) { - result[++index] = iteratee(value, key, collection); - }); - return result; - } - - /** - * The base implementation of `_.matches` which does not clone `source`. - * - * @private - * @param {Object} source The object of property values to match. - * @returns {Function} Returns the new function. - */ - function baseMatches(source) { - var props = keys(source), - length = props.length; - - if (!length) { - return constant(true); - } - if (length == 1) { - var key = props[0], - value = source[key]; - - if (isStrictComparable(value)) { - return function(object) { - if (object == null) { - return false; - } - return object[key] === value && (value !== undefined || (key in toObject(object))); - }; - } - } - var values = Array(length), - strictCompareFlags = Array(length); - - while (length--) { - value = source[props[length]]; - values[length] = value; - strictCompareFlags[length] = isStrictComparable(value); - } - return function(object) { - return object != null && baseIsMatch(toObject(object), props, values, strictCompareFlags); - }; - } - - /** - * The base implementation of `_.matchesProperty` which does not which does - * not clone `value`. - * - * @private - * @param {string} path The path of the property to get. - * @param {*} value The value to compare. - * @returns {Function} Returns the new function. - */ - function baseMatchesProperty(path, value) { - var isArr = isArray(path), - isCommon = isKey(path) && isStrictComparable(value), - pathKey = (path + ''); - - path = toPath(path); - return function(object) { - if (object == null) { - return false; - } - var key = pathKey; - object = toObject(object); - if ((isArr || !isCommon) && !(key in object)) { - object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1)); - if (object == null) { - return false; - } - key = last(path); - object = toObject(object); - } - return object[key] === value - ? (value !== undefined || (key in object)) - : baseIsEqual(value, object[key], null, true); - }; - } - - /** - * The base implementation of `_.merge` without support for argument juggling, - * multiple sources, and `this` binding `customizer` functions. - * - * @private - * @param {Object} object The destination object. - * @param {Object} source The source object. - * @param {Function} [customizer] The function to customize merging properties. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates values with source counterparts. - * @returns {Object} Returns `object`. - */ - function baseMerge(object, source, customizer, stackA, stackB) { - if (!isObject(object)) { - return object; - } - var isSrcArr = isLength(source.length) && (isArray(source) || isTypedArray(source)); - if (!isSrcArr) { - var props = keys(source); - push.apply(props, getSymbols(source)); - } - arrayEach(props || source, function(srcValue, key) { - if (props) { - key = srcValue; - srcValue = source[key]; - } - if (isObjectLike(srcValue)) { - stackA || (stackA = []); - stackB || (stackB = []); - baseMergeDeep(object, source, key, baseMerge, customizer, stackA, stackB); - } - else { - var value = object[key], - result = customizer ? customizer(value, srcValue, key, object, source) : undefined, - isCommon = result === undefined; - - if (isCommon) { - result = srcValue; - } - if ((isSrcArr || result !== undefined) && - (isCommon || (result === result ? (result !== value) : (value === value)))) { - object[key] = result; - } - } - }); - return object; - } - - /** - * A specialized version of `baseMerge` for arrays and objects which performs - * deep merges and tracks traversed objects enabling objects with circular - * references to be merged. - * - * @private - * @param {Object} object The destination object. - * @param {Object} source The source object. - * @param {string} key The key of the value to merge. - * @param {Function} mergeFunc The function to merge values. - * @param {Function} [customizer] The function to customize merging properties. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates values with source counterparts. - * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. - */ - function baseMergeDeep(object, source, key, mergeFunc, customizer, stackA, stackB) { - var length = stackA.length, - srcValue = source[key]; - - while (length--) { - if (stackA[length] == srcValue) { - object[key] = stackB[length]; - return; - } - } - var value = object[key], - result = customizer ? customizer(value, srcValue, key, object, source) : undefined, - isCommon = result === undefined; - - if (isCommon) { - result = srcValue; - if (isLength(srcValue.length) && (isArray(srcValue) || isTypedArray(srcValue))) { - result = isArray(value) - ? value - : (getLength(value) ? arrayCopy(value) : []); - } - else if (isPlainObject(srcValue) || isArguments(srcValue)) { - result = isArguments(value) - ? toPlainObject(value) - : (isPlainObject(value) ? value : {}); - } - else { - isCommon = false; - } - } - // Add the source value to the stack of traversed objects and associate - // it with its merged value. - stackA.push(srcValue); - stackB.push(result); - - if (isCommon) { - // Recursively merge objects and arrays (susceptible to call stack limits). - object[key] = mergeFunc(result, srcValue, customizer, stackA, stackB); - } else if (result === result ? (result !== value) : (value === value)) { - object[key] = result; - } - } - - /** - * The base implementation of `_.property` without support for deep paths. - * - * @private - * @param {string} key The key of the property to get. - * @returns {Function} Returns the new function. - */ - function baseProperty(key) { - return function(object) { - return object == null ? undefined : object[key]; - }; - } - - /** - * A specialized version of `baseProperty` which supports deep paths. - * - * @private - * @param {Array|string} path The path of the property to get. - * @returns {Function} Returns the new function. - */ - function basePropertyDeep(path) { - var pathKey = (path + ''); - path = toPath(path); - return function(object) { - return baseGet(object, path, pathKey); - }; - } - - /** - * The base implementation of `_.pullAt` without support for individual - * index arguments and capturing the removed elements. - * - * @private - * @param {Array} array The array to modify. - * @param {number[]} indexes The indexes of elements to remove. - * @returns {Array} Returns `array`. - */ - function basePullAt(array, indexes) { - var length = indexes.length; - while (length--) { - var index = parseFloat(indexes[length]); - if (index != previous && isIndex(index)) { - var previous = index; - splice.call(array, index, 1); - } - } - return array; - } - - /** - * The base implementation of `_.random` without support for argument juggling - * and returning floating-point numbers. - * - * @private - * @param {number} min The minimum possible value. - * @param {number} max The maximum possible value. - * @returns {number} Returns the random number. - */ - function baseRandom(min, max) { - return min + floor(nativeRandom() * (max - min + 1)); - } - - /** - * The base implementation of `_.reduce` and `_.reduceRight` without support - * for callback shorthands and `this` binding, which iterates over `collection` - * using the provided `eachFunc`. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {*} accumulator The initial value. - * @param {boolean} initFromCollection Specify using the first or last element - * of `collection` as the initial value. - * @param {Function} eachFunc The function to iterate over `collection`. - * @returns {*} Returns the accumulated value. - */ - function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) { - eachFunc(collection, function(value, index, collection) { - accumulator = initFromCollection - ? (initFromCollection = false, value) - : iteratee(accumulator, value, index, collection); - }); - return accumulator; - } - - /** - * The base implementation of `setData` without support for hot loop detection. - * - * @private - * @param {Function} func The function to associate metadata with. - * @param {*} data The metadata. - * @returns {Function} Returns `func`. - */ - var baseSetData = !metaMap ? identity : function(func, data) { - metaMap.set(func, data); - return func; - }; - - /** - * The base implementation of `_.slice` without an iteratee call guard. - * - * @private - * @param {Array} array The array to slice. - * @param {number} [start=0] The start position. - * @param {number} [end=array.length] The end position. - * @returns {Array} Returns the slice of `array`. - */ - function baseSlice(array, start, end) { - var index = -1, - length = array.length; - - start = start == null ? 0 : (+start || 0); - if (start < 0) { - start = -start > length ? 0 : (length + start); - } - end = (end === undefined || end > length) ? length : (+end || 0); - if (end < 0) { - end += length; - } - length = start > end ? 0 : ((end - start) >>> 0); - start >>>= 0; - - var result = Array(length); - while (++index < length) { - result[index] = array[index + start]; - } - return result; - } - - /** - * The base implementation of `_.some` without support for callback shorthands - * and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} predicate The function invoked per iteration. - * @returns {boolean} Returns `true` if any element passes the predicate check, - * else `false`. - */ - function baseSome(collection, predicate) { - var result; - - baseEach(collection, function(value, index, collection) { - result = predicate(value, index, collection); - return !result; - }); - return !!result; - } - - /** - * The base implementation of `_.sortBy` which uses `comparer` to define - * the sort order of `array` and replaces criteria objects with their - * corresponding values. - * - * @private - * @param {Array} array The array to sort. - * @param {Function} comparer The function to define sort order. - * @returns {Array} Returns `array`. - */ - function baseSortBy(array, comparer) { - var length = array.length; - - array.sort(comparer); - while (length--) { - array[length] = array[length].value; - } - return array; - } - - /** - * The base implementation of `_.sortByOrder` without param guards. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by. - * @param {boolean[]} orders The sort orders of `iteratees`. - * @returns {Array} Returns the new sorted array. - */ - function baseSortByOrder(collection, iteratees, orders) { - var callback = getCallback(), - index = -1; - - iteratees = arrayMap(iteratees, function(iteratee) { return callback(iteratee); }); - - var result = baseMap(collection, function(value) { - var criteria = arrayMap(iteratees, function(iteratee) { return iteratee(value); }); - return { 'criteria': criteria, 'index': ++index, 'value': value }; - }); - - return baseSortBy(result, function(object, other) { - return compareMultiple(object, other, orders); - }); - } - - /** - * The base implementation of `_.sum` without support for callback shorthands - * and `this` binding. - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @returns {number} Returns the sum. - */ - function baseSum(collection, iteratee) { - var result = 0; - baseEach(collection, function(value, index, collection) { - result += +iteratee(value, index, collection) || 0; - }); - return result; - } - - /** - * The base implementation of `_.uniq` without support for callback shorthands - * and `this` binding. - * - * @private - * @param {Array} array The array to inspect. - * @param {Function} [iteratee] The function invoked per iteration. - * @returns {Array} Returns the new duplicate-value-free array. - */ - function baseUniq(array, iteratee) { - var index = -1, - indexOf = getIndexOf(), - length = array.length, - isCommon = indexOf == baseIndexOf, - isLarge = isCommon && length >= 200, - seen = isLarge ? createCache() : null, - result = []; - - if (seen) { - indexOf = cacheIndexOf; - isCommon = false; - } else { - isLarge = false; - seen = iteratee ? [] : result; - } - outer: - while (++index < length) { - var value = array[index], - computed = iteratee ? iteratee(value, index, array) : value; - - if (isCommon && value === value) { - var seenIndex = seen.length; - while (seenIndex--) { - if (seen[seenIndex] === computed) { - continue outer; - } - } - if (iteratee) { - seen.push(computed); - } - result.push(value); - } - else if (indexOf(seen, computed, 0) < 0) { - if (iteratee || isLarge) { - seen.push(computed); - } - result.push(value); - } - } - return result; - } - - /** - * The base implementation of `_.values` and `_.valuesIn` which creates an - * array of `object` property values corresponding to the property names - * of `props`. - * - * @private - * @param {Object} object The object to query. - * @param {Array} props The property names to get values for. - * @returns {Object} Returns the array of property values. - */ - function baseValues(object, props) { - var index = -1, - length = props.length, - result = Array(length); - - while (++index < length) { - result[index] = object[props[index]]; - } - return result; - } - - /** - * The base implementation of `_.dropRightWhile`, `_.dropWhile`, `_.takeRightWhile`, - * and `_.takeWhile` without support for callback shorthands and `this` binding. - * - * @private - * @param {Array} array The array to query. - * @param {Function} predicate The function invoked per iteration. - * @param {boolean} [isDrop] Specify dropping elements instead of taking them. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Array} Returns the slice of `array`. - */ - function baseWhile(array, predicate, isDrop, fromRight) { - var length = array.length, - index = fromRight ? length : -1; - - while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {} - return isDrop - ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length)) - : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index)); - } - - /** - * The base implementation of `wrapperValue` which returns the result of - * performing a sequence of actions on the unwrapped `value`, where each - * successive action is supplied the return value of the previous. - * - * @private - * @param {*} value The unwrapped value. - * @param {Array} actions Actions to peform to resolve the unwrapped value. - * @returns {*} Returns the resolved value. - */ - function baseWrapperValue(value, actions) { - var result = value; - if (result instanceof LazyWrapper) { - result = result.value(); - } - var index = -1, - length = actions.length; - - while (++index < length) { - var args = [result], - action = actions[index]; - - push.apply(args, action.args); - result = action.func.apply(action.thisArg, args); - } - return result; - } - - /** - * Performs a binary search of `array` to determine the index at which `value` - * should be inserted into `array` in order to maintain its sort order. - * - * @private - * @param {Array} array The sorted array to inspect. - * @param {*} value The value to evaluate. - * @param {boolean} [retHighest] Specify returning the highest qualified index. - * @returns {number} Returns the index at which `value` should be inserted - * into `array`. - */ - function binaryIndex(array, value, retHighest) { - var low = 0, - high = array ? array.length : low; - - if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) { - while (low < high) { - var mid = (low + high) >>> 1, - computed = array[mid]; - - if (retHighest ? (computed <= value) : (computed < value)) { - low = mid + 1; - } else { - high = mid; - } - } - return high; - } - return binaryIndexBy(array, value, identity, retHighest); - } - - /** - * This function is like `binaryIndex` except that it invokes `iteratee` for - * `value` and each element of `array` to compute their sort ranking. The - * iteratee is invoked with one argument; (value). - * - * @private - * @param {Array} array The sorted array to inspect. - * @param {*} value The value to evaluate. - * @param {Function} iteratee The function invoked per iteration. - * @param {boolean} [retHighest] Specify returning the highest qualified index. - * @returns {number} Returns the index at which `value` should be inserted - * into `array`. - */ - function binaryIndexBy(array, value, iteratee, retHighest) { - value = iteratee(value); - - var low = 0, - high = array ? array.length : 0, - valIsNaN = value !== value, - valIsUndef = value === undefined; - - while (low < high) { - var mid = floor((low + high) / 2), - computed = iteratee(array[mid]), - isReflexive = computed === computed; - - if (valIsNaN) { - var setLow = isReflexive || retHighest; - } else if (valIsUndef) { - setLow = isReflexive && (retHighest || computed !== undefined); - } else { - setLow = retHighest ? (computed <= value) : (computed < value); - } - if (setLow) { - low = mid + 1; - } else { - high = mid; - } - } - return nativeMin(high, MAX_ARRAY_INDEX); - } - - /** - * A specialized version of `baseCallback` which only supports `this` binding - * and specifying the number of arguments to provide to `func`. - * - * @private - * @param {Function} func The function to bind. - * @param {*} thisArg The `this` binding of `func`. - * @param {number} [argCount] The number of arguments to provide to `func`. - * @returns {Function} Returns the callback. - */ - function bindCallback(func, thisArg, argCount) { - if (typeof func != 'function') { - return identity; - } - if (thisArg === undefined) { - return func; - } - switch (argCount) { - case 1: return function(value) { - return func.call(thisArg, value); - }; - case 3: return function(value, index, collection) { - return func.call(thisArg, value, index, collection); - }; - case 4: return function(accumulator, value, index, collection) { - return func.call(thisArg, accumulator, value, index, collection); - }; - case 5: return function(value, other, key, object, source) { - return func.call(thisArg, value, other, key, object, source); - }; - } - return function() { - return func.apply(thisArg, arguments); - }; - } - - /** - * Creates a clone of the given array buffer. - * - * @private - * @param {ArrayBuffer} buffer The array buffer to clone. - * @returns {ArrayBuffer} Returns the cloned array buffer. - */ - function bufferClone(buffer) { - return bufferSlice.call(buffer, 0); - } - if (!bufferSlice) { - // PhantomJS has `ArrayBuffer` and `Uint8Array` but not `Float64Array`. - bufferClone = !(ArrayBuffer && Uint8Array) ? constant(null) : function(buffer) { - var byteLength = buffer.byteLength, - floatLength = Float64Array ? floor(byteLength / FLOAT64_BYTES_PER_ELEMENT) : 0, - offset = floatLength * FLOAT64_BYTES_PER_ELEMENT, - result = new ArrayBuffer(byteLength); - - if (floatLength) { - var view = new Float64Array(result, 0, floatLength); - view.set(new Float64Array(buffer, 0, floatLength)); - } - if (byteLength != offset) { - view = new Uint8Array(result, offset); - view.set(new Uint8Array(buffer, offset)); - } - return result; - }; - } - - /** - * Creates an array that is the composition of partially applied arguments, - * placeholders, and provided arguments into a single array of arguments. - * - * @private - * @param {Array|Object} args The provided arguments. - * @param {Array} partials The arguments to prepend to those provided. - * @param {Array} holders The `partials` placeholder indexes. - * @returns {Array} Returns the new array of composed arguments. - */ - function composeArgs(args, partials, holders) { - var holdersLength = holders.length, - argsIndex = -1, - argsLength = nativeMax(args.length - holdersLength, 0), - leftIndex = -1, - leftLength = partials.length, - result = Array(argsLength + leftLength); - - while (++leftIndex < leftLength) { - result[leftIndex] = partials[leftIndex]; - } - while (++argsIndex < holdersLength) { - result[holders[argsIndex]] = args[argsIndex]; - } - while (argsLength--) { - result[leftIndex++] = args[argsIndex++]; - } - return result; - } - - /** - * This function is like `composeArgs` except that the arguments composition - * is tailored for `_.partialRight`. - * - * @private - * @param {Array|Object} args The provided arguments. - * @param {Array} partials The arguments to append to those provided. - * @param {Array} holders The `partials` placeholder indexes. - * @returns {Array} Returns the new array of composed arguments. - */ - function composeArgsRight(args, partials, holders) { - var holdersIndex = -1, - holdersLength = holders.length, - argsIndex = -1, - argsLength = nativeMax(args.length - holdersLength, 0), - rightIndex = -1, - rightLength = partials.length, - result = Array(argsLength + rightLength); - - while (++argsIndex < argsLength) { - result[argsIndex] = args[argsIndex]; - } - var pad = argsIndex; - while (++rightIndex < rightLength) { - result[pad + rightIndex] = partials[rightIndex]; - } - while (++holdersIndex < holdersLength) { - result[pad + holders[holdersIndex]] = args[argsIndex++]; - } - return result; - } - - /** - * Creates a function that aggregates a collection, creating an accumulator - * object composed from the results of running each element in the collection - * through an iteratee. - * - * **Note:** This function is used to create `_.countBy`, `_.groupBy`, `_.indexBy`, - * and `_.partition`. - * - * @private - * @param {Function} setter The function to set keys and values of the accumulator object. - * @param {Function} [initializer] The function to initialize the accumulator object. - * @returns {Function} Returns the new aggregator function. - */ - function createAggregator(setter, initializer) { - return function(collection, iteratee, thisArg) { - var result = initializer ? initializer() : {}; - iteratee = getCallback(iteratee, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - setter(result, value, iteratee(value, index, collection), collection); - } - } else { - baseEach(collection, function(value, key, collection) { - setter(result, value, iteratee(value, key, collection), collection); - }); - } - return result; - }; - } - - /** - * Creates a function that assigns properties of source object(s) to a given - * destination object. - * - * **Note:** This function is used to create `_.assign`, `_.defaults`, and `_.merge`. - * - * @private - * @param {Function} assigner The function to assign values. - * @returns {Function} Returns the new assigner function. - */ - function createAssigner(assigner) { - return restParam(function(object, sources) { - var index = -1, - length = object == null ? 0 : sources.length, - customizer = length > 2 && sources[length - 2], - guard = length > 2 && sources[2], - thisArg = length > 1 && sources[length - 1]; - - if (typeof customizer == 'function') { - customizer = bindCallback(customizer, thisArg, 5); - length -= 2; - } else { - customizer = typeof thisArg == 'function' ? thisArg : null; - length -= (customizer ? 1 : 0); - } - if (guard && isIterateeCall(sources[0], sources[1], guard)) { - customizer = length < 3 ? null : customizer; - length = 1; - } - while (++index < length) { - var source = sources[index]; - if (source) { - assigner(object, source, customizer); - } - } - return object; - }); - } - - /** - * Creates a `baseEach` or `baseEachRight` function. - * - * @private - * @param {Function} eachFunc The function to iterate over a collection. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Function} Returns the new base function. - */ - function createBaseEach(eachFunc, fromRight) { - return function(collection, iteratee) { - var length = collection ? getLength(collection) : 0; - if (!isLength(length)) { - return eachFunc(collection, iteratee); - } - var index = fromRight ? length : -1, - iterable = toObject(collection); - - while ((fromRight ? index-- : ++index < length)) { - if (iteratee(iterable[index], index, iterable) === false) { - break; - } - } - return collection; - }; - } - - /** - * Creates a base function for `_.forIn` or `_.forInRight`. - * - * @private - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Function} Returns the new base function. - */ - function createBaseFor(fromRight) { - return function(object, iteratee, keysFunc) { - var iterable = toObject(object), - props = keysFunc(object), - length = props.length, - index = fromRight ? length : -1; - - while ((fromRight ? index-- : ++index < length)) { - var key = props[index]; - if (iteratee(iterable[key], key, iterable) === false) { - break; - } - } - return object; - }; - } - - /** - * Creates a function that wraps `func` and invokes it with the `this` - * binding of `thisArg`. - * - * @private - * @param {Function} func The function to bind. - * @param {*} [thisArg] The `this` binding of `func`. - * @returns {Function} Returns the new bound function. - */ - function createBindWrapper(func, thisArg) { - var Ctor = createCtorWrapper(func); - - function wrapper() { - var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; - return fn.apply(thisArg, arguments); - } - return wrapper; - } - - /** - * Creates a `Set` cache object to optimize linear searches of large arrays. - * - * @private - * @param {Array} [values] The values to cache. - * @returns {null|Object} Returns the new cache object if `Set` is supported, else `null`. - */ - var createCache = !(nativeCreate && Set) ? constant(null) : function(values) { - return new SetCache(values); - }; - - /** - * Creates a function that produces compound words out of the words in a - * given string. - * - * @private - * @param {Function} callback The function to combine each word. - * @returns {Function} Returns the new compounder function. - */ - function createCompounder(callback) { - return function(string) { - var index = -1, - array = words(deburr(string)), - length = array.length, - result = ''; - - while (++index < length) { - result = callback(result, array[index], index); - } - return result; - }; - } - - /** - * Creates a function that produces an instance of `Ctor` regardless of - * whether it was invoked as part of a `new` expression or by `call` or `apply`. - * - * @private - * @param {Function} Ctor The constructor to wrap. - * @returns {Function} Returns the new wrapped function. - */ - function createCtorWrapper(Ctor) { - return function() { - var thisBinding = baseCreate(Ctor.prototype), - result = Ctor.apply(thisBinding, arguments); - - // Mimic the constructor's `return` behavior. - // See https://es5.github.io/#x13.2.2 for more details. - return isObject(result) ? result : thisBinding; - }; - } - - /** - * Creates a `_.curry` or `_.curryRight` function. - * - * @private - * @param {boolean} flag The curry bit flag. - * @returns {Function} Returns the new curry function. - */ - function createCurry(flag) { - function curryFunc(func, arity, guard) { - if (guard && isIterateeCall(func, arity, guard)) { - arity = null; - } - var result = createWrapper(func, flag, null, null, null, null, null, arity); - result.placeholder = curryFunc.placeholder; - return result; - } - return curryFunc; - } - - /** - * Creates a `_.max` or `_.min` function. - * - * @private - * @param {Function} arrayFunc The function to get the extremum value from an array. - * @param {boolean} [isMin] Specify returning the minimum, instead of the maximum, - * extremum value. - * @returns {Function} Returns the new extremum function. - */ - function createExtremum(arrayFunc, isMin) { - return function(collection, iteratee, thisArg) { - if (thisArg && isIterateeCall(collection, iteratee, thisArg)) { - iteratee = null; - } - var func = getCallback(), - noIteratee = iteratee == null; - - if (!(func === baseCallback && noIteratee)) { - noIteratee = false; - iteratee = func(iteratee, thisArg, 3); - } - if (noIteratee) { - var isArr = isArray(collection); - if (!isArr && isString(collection)) { - iteratee = charAtCallback; - } else { - return arrayFunc(isArr ? collection : toIterable(collection)); - } - } - return extremumBy(collection, iteratee, isMin); - }; - } - - /** - * Creates a `_.find` or `_.findLast` function. - * - * @private - * @param {Function} eachFunc The function to iterate over a collection. - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Function} Returns the new find function. - */ - function createFind(eachFunc, fromRight) { - return function(collection, predicate, thisArg) { - predicate = getCallback(predicate, thisArg, 3); - if (isArray(collection)) { - var index = baseFindIndex(collection, predicate, fromRight); - return index > -1 ? collection[index] : undefined; - } - return baseFind(collection, predicate, eachFunc); - } - } - - /** - * Creates a `_.findIndex` or `_.findLastIndex` function. - * - * @private - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Function} Returns the new find function. - */ - function createFindIndex(fromRight) { - return function(array, predicate, thisArg) { - if (!(array && array.length)) { - return -1; - } - predicate = getCallback(predicate, thisArg, 3); - return baseFindIndex(array, predicate, fromRight); - }; - } - - /** - * Creates a `_.findKey` or `_.findLastKey` function. - * - * @private - * @param {Function} objectFunc The function to iterate over an object. - * @returns {Function} Returns the new find function. - */ - function createFindKey(objectFunc) { - return function(object, predicate, thisArg) { - predicate = getCallback(predicate, thisArg, 3); - return baseFind(object, predicate, objectFunc, true); - }; - } - - /** - * Creates a `_.flow` or `_.flowRight` function. - * - * @private - * @param {boolean} [fromRight] Specify iterating from right to left. - * @returns {Function} Returns the new flow function. - */ - function createFlow(fromRight) { - return function() { - var length = arguments.length; - if (!length) { - return function() { return arguments[0]; }; - } - var wrapper, - index = fromRight ? length : -1, - leftIndex = 0, - funcs = Array(length); - - while ((fromRight ? index-- : ++index < length)) { - var func = funcs[leftIndex++] = arguments[index]; - if (typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - var funcName = wrapper ? '' : getFuncName(func); - wrapper = funcName == 'wrapper' ? new LodashWrapper([]) : wrapper; - } - index = wrapper ? -1 : length; - while (++index < length) { - func = funcs[index]; - funcName = getFuncName(func); - - var data = funcName == 'wrapper' ? getData(func) : null; - if (data && isLaziable(data[0])) { - wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]); - } else { - wrapper = (func.length == 1 && isLaziable(func)) ? wrapper[funcName]() : wrapper.thru(func); - } - } - return function() { - var args = arguments; - if (wrapper && args.length == 1 && isArray(args[0])) { - return wrapper.plant(args[0]).value(); - } - var index = 0, - result = funcs[index].apply(this, args); - - while (++index < length) { - result = funcs[index].call(this, result); - } - return result; - }; - }; - } - - /** - * Creates a function for `_.forEach` or `_.forEachRight`. - * - * @private - * @param {Function} arrayFunc The function to iterate over an array. - * @param {Function} eachFunc The function to iterate over a collection. - * @returns {Function} Returns the new each function. - */ - function createForEach(arrayFunc, eachFunc) { - return function(collection, iteratee, thisArg) { - return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection)) - ? arrayFunc(collection, iteratee) - : eachFunc(collection, bindCallback(iteratee, thisArg, 3)); - }; - } - - /** - * Creates a function for `_.forIn` or `_.forInRight`. - * - * @private - * @param {Function} objectFunc The function to iterate over an object. - * @returns {Function} Returns the new each function. - */ - function createForIn(objectFunc) { - return function(object, iteratee, thisArg) { - if (typeof iteratee != 'function' || thisArg !== undefined) { - iteratee = bindCallback(iteratee, thisArg, 3); - } - return objectFunc(object, iteratee, keysIn); - }; - } - - /** - * Creates a function for `_.forOwn` or `_.forOwnRight`. - * - * @private - * @param {Function} objectFunc The function to iterate over an object. - * @returns {Function} Returns the new each function. - */ - function createForOwn(objectFunc) { - return function(object, iteratee, thisArg) { - if (typeof iteratee != 'function' || thisArg !== undefined) { - iteratee = bindCallback(iteratee, thisArg, 3); - } - return objectFunc(object, iteratee); - }; - } - - /** - * Creates a function for `_.padLeft` or `_.padRight`. - * - * @private - * @param {boolean} [fromRight] Specify padding from the right. - * @returns {Function} Returns the new pad function. - */ - function createPadDir(fromRight) { - return function(string, length, chars) { - string = baseToString(string); - return string && ((fromRight ? string : '') + createPadding(string, length, chars) + (fromRight ? '' : string)); - }; - } - - /** - * Creates a `_.partial` or `_.partialRight` function. - * - * @private - * @param {boolean} flag The partial bit flag. - * @returns {Function} Returns the new partial function. - */ - function createPartial(flag) { - var partialFunc = restParam(function(func, partials) { - var holders = replaceHolders(partials, partialFunc.placeholder); - return createWrapper(func, flag, null, partials, holders); - }); - return partialFunc; - } - - /** - * Creates a function for `_.reduce` or `_.reduceRight`. - * - * @private - * @param {Function} arrayFunc The function to iterate over an array. - * @param {Function} eachFunc The function to iterate over a collection. - * @returns {Function} Returns the new each function. - */ - function createReduce(arrayFunc, eachFunc) { - return function(collection, iteratee, accumulator, thisArg) { - var initFromArray = arguments.length < 3; - return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection)) - ? arrayFunc(collection, iteratee, accumulator, initFromArray) - : baseReduce(collection, getCallback(iteratee, thisArg, 4), accumulator, initFromArray, eachFunc); - }; - } - - /** - * Creates a function that wraps `func` and invokes it with optional `this` - * binding of, partial application, and currying. - * - * @private - * @param {Function|string} func The function or method name to reference. - * @param {number} bitmask The bitmask of flags. See `createWrapper` for more details. - * @param {*} [thisArg] The `this` binding of `func`. - * @param {Array} [partials] The arguments to prepend to those provided to the new function. - * @param {Array} [holders] The `partials` placeholder indexes. - * @param {Array} [partialsRight] The arguments to append to those provided to the new function. - * @param {Array} [holdersRight] The `partialsRight` placeholder indexes. - * @param {Array} [argPos] The argument positions of the new function. - * @param {number} [ary] The arity cap of `func`. - * @param {number} [arity] The arity of `func`. - * @returns {Function} Returns the new wrapped function. - */ - function createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) { - var isAry = bitmask & ARY_FLAG, - isBind = bitmask & BIND_FLAG, - isBindKey = bitmask & BIND_KEY_FLAG, - isCurry = bitmask & CURRY_FLAG, - isCurryBound = bitmask & CURRY_BOUND_FLAG, - isCurryRight = bitmask & CURRY_RIGHT_FLAG; - - var Ctor = !isBindKey && createCtorWrapper(func), - key = func; - - function wrapper() { - // Avoid `arguments` object use disqualifying optimizations by - // converting it to an array before providing it to other functions. - var length = arguments.length, - index = length, - args = Array(length); - - while (index--) { - args[index] = arguments[index]; - } - if (partials) { - args = composeArgs(args, partials, holders); - } - if (partialsRight) { - args = composeArgsRight(args, partialsRight, holdersRight); - } - if (isCurry || isCurryRight) { - var placeholder = wrapper.placeholder, - argsHolders = replaceHolders(args, placeholder); - - length -= argsHolders.length; - if (length < arity) { - var newArgPos = argPos ? arrayCopy(argPos) : null, - newArity = nativeMax(arity - length, 0), - newsHolders = isCurry ? argsHolders : null, - newHoldersRight = isCurry ? null : argsHolders, - newPartials = isCurry ? args : null, - newPartialsRight = isCurry ? null : args; - - bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG); - bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG); - - if (!isCurryBound) { - bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG); - } - var newData = [func, bitmask, thisArg, newPartials, newsHolders, newPartialsRight, newHoldersRight, newArgPos, ary, newArity], - result = createHybridWrapper.apply(undefined, newData); - - if (isLaziable(func)) { - setData(result, newData); - } - result.placeholder = placeholder; - return result; - } - } - var thisBinding = isBind ? thisArg : this; - if (isBindKey) { - func = thisBinding[key]; - } - if (argPos) { - args = reorder(args, argPos); - } - if (isAry && ary < args.length) { - args.length = ary; - } - var fn = (this && this !== root && this instanceof wrapper) ? (Ctor || createCtorWrapper(func)) : func; - return fn.apply(thisBinding, args); - } - return wrapper; - } - - /** - * Creates the padding required for `string` based on the given `length`. - * The `chars` string is truncated if the number of characters exceeds `length`. - * - * @private - * @param {string} string The string to create padding for. - * @param {number} [length=0] The padding length. - * @param {string} [chars=' '] The string used as padding. - * @returns {string} Returns the pad for `string`. - */ - function createPadding(string, length, chars) { - var strLength = string.length; - length = +length; - - if (strLength >= length || !nativeIsFinite(length)) { - return ''; - } - var padLength = length - strLength; - chars = chars == null ? ' ' : (chars + ''); - return repeat(chars, ceil(padLength / chars.length)).slice(0, padLength); - } - - /** - * Creates a function that wraps `func` and invokes it with the optional `this` - * binding of `thisArg` and the `partials` prepended to those provided to - * the wrapper. - * - * @private - * @param {Function} func The function to partially apply arguments to. - * @param {number} bitmask The bitmask of flags. See `createWrapper` for more details. - * @param {*} thisArg The `this` binding of `func`. - * @param {Array} partials The arguments to prepend to those provided to the new function. - * @returns {Function} Returns the new bound function. - */ - function createPartialWrapper(func, bitmask, thisArg, partials) { - var isBind = bitmask & BIND_FLAG, - Ctor = createCtorWrapper(func); - - function wrapper() { - // Avoid `arguments` object use disqualifying optimizations by - // converting it to an array before providing it `func`. - var argsIndex = -1, - argsLength = arguments.length, - leftIndex = -1, - leftLength = partials.length, - args = Array(argsLength + leftLength); - - while (++leftIndex < leftLength) { - args[leftIndex] = partials[leftIndex]; - } - while (argsLength--) { - args[leftIndex++] = arguments[++argsIndex]; - } - var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; - return fn.apply(isBind ? thisArg : this, args); - } - return wrapper; - } - - /** - * Creates a `_.sortedIndex` or `_.sortedLastIndex` function. - * - * @private - * @param {boolean} [retHighest] Specify returning the highest qualified index. - * @returns {Function} Returns the new index function. - */ - function createSortedIndex(retHighest) { - return function(array, value, iteratee, thisArg) { - var func = getCallback(iteratee); - return (func === baseCallback && iteratee == null) - ? binaryIndex(array, value, retHighest) - : binaryIndexBy(array, value, func(iteratee, thisArg, 1), retHighest); - }; - } - - /** - * Creates a function that either curries or invokes `func` with optional - * `this` binding and partially applied arguments. - * - * @private - * @param {Function|string} func The function or method name to reference. - * @param {number} bitmask The bitmask of flags. - * The bitmask may be composed of the following flags: - * 1 - `_.bind` - * 2 - `_.bindKey` - * 4 - `_.curry` or `_.curryRight` of a bound function - * 8 - `_.curry` - * 16 - `_.curryRight` - * 32 - `_.partial` - * 64 - `_.partialRight` - * 128 - `_.rearg` - * 256 - `_.ary` - * @param {*} [thisArg] The `this` binding of `func`. - * @param {Array} [partials] The arguments to be partially applied. - * @param {Array} [holders] The `partials` placeholder indexes. - * @param {Array} [argPos] The argument positions of the new function. - * @param {number} [ary] The arity cap of `func`. - * @param {number} [arity] The arity of `func`. - * @returns {Function} Returns the new wrapped function. - */ - function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) { - var isBindKey = bitmask & BIND_KEY_FLAG; - if (!isBindKey && typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - var length = partials ? partials.length : 0; - if (!length) { - bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG); - partials = holders = null; - } - length -= (holders ? holders.length : 0); - if (bitmask & PARTIAL_RIGHT_FLAG) { - var partialsRight = partials, - holdersRight = holders; - - partials = holders = null; - } - var data = isBindKey ? null : getData(func), - newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity]; - - if (data) { - mergeData(newData, data); - bitmask = newData[1]; - arity = newData[9]; - } - newData[9] = arity == null - ? (isBindKey ? 0 : func.length) - : (nativeMax(arity - length, 0) || 0); - - if (bitmask == BIND_FLAG) { - var result = createBindWrapper(newData[0], newData[2]); - } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !newData[4].length) { - result = createPartialWrapper.apply(undefined, newData); - } else { - result = createHybridWrapper.apply(undefined, newData); - } - var setter = data ? baseSetData : setData; - return setter(result, newData); - } - - /** - * A specialized version of `baseIsEqualDeep` for arrays with support for - * partial deep comparisons. - * - * @private - * @param {Array} array The array to compare. - * @param {Array} other The other array to compare. - * @param {Function} equalFunc The function to determine equivalents of values. - * @param {Function} [customizer] The function to customize comparing arrays. - * @param {boolean} [isLoose] Specify performing partial comparisons. - * @param {Array} [stackA] Tracks traversed `value` objects. - * @param {Array} [stackB] Tracks traversed `other` objects. - * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`. - */ - function equalArrays(array, other, equalFunc, customizer, isLoose, stackA, stackB) { - var index = -1, - arrLength = array.length, - othLength = other.length, - result = true; - - if (arrLength != othLength && !(isLoose && othLength > arrLength)) { - return false; - } - // Deep compare the contents, ignoring non-numeric properties. - while (result && ++index < arrLength) { - var arrValue = array[index], - othValue = other[index]; - - result = undefined; - if (customizer) { - result = isLoose - ? customizer(othValue, arrValue, index) - : customizer(arrValue, othValue, index); - } - if (result === undefined) { - // Recursively compare arrays (susceptible to call stack limits). - if (isLoose) { - var othIndex = othLength; - while (othIndex--) { - othValue = other[othIndex]; - result = (arrValue && arrValue === othValue) || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB); - if (result) { - break; - } - } - } else { - result = (arrValue && arrValue === othValue) || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB); - } - } - } - return !!result; - } - - /** - * A specialized version of `baseIsEqualDeep` for comparing objects of - * the same `toStringTag`. - * - * **Note:** This function only supports comparing values with tags of - * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. - * - * @private - * @param {Object} value The object to compare. - * @param {Object} other The other object to compare. - * @param {string} tag The `toStringTag` of the objects to compare. - * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. - */ - function equalByTag(object, other, tag) { - switch (tag) { - case boolTag: - case dateTag: - // Coerce dates and booleans to numbers, dates to milliseconds and booleans - // to `1` or `0` treating invalid dates coerced to `NaN` as not equal. - return +object == +other; - - case errorTag: - return object.name == other.name && object.message == other.message; - - case numberTag: - // Treat `NaN` vs. `NaN` as equal. - return (object != +object) - ? other != +other - // But, treat `-0` vs. `+0` as not equal. - : (object == 0 ? ((1 / object) == (1 / other)) : object == +other); - - case regexpTag: - case stringTag: - // Coerce regexes to strings and treat strings primitives and string - // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details. - return object == (other + ''); - } - return false; - } - - /** - * A specialized version of `baseIsEqualDeep` for objects with support for - * partial deep comparisons. - * - * @private - * @param {Object} object The object to compare. - * @param {Object} other The other object to compare. - * @param {Function} equalFunc The function to determine equivalents of values. - * @param {Function} [customizer] The function to customize comparing values. - * @param {boolean} [isLoose] Specify performing partial comparisons. - * @param {Array} [stackA] Tracks traversed `value` objects. - * @param {Array} [stackB] Tracks traversed `other` objects. - * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. - */ - function equalObjects(object, other, equalFunc, customizer, isLoose, stackA, stackB) { - var objProps = keys(object), - objLength = objProps.length, - othProps = keys(other), - othLength = othProps.length; - - if (objLength != othLength && !isLoose) { - return false; - } - var skipCtor = isLoose, - index = -1; - - while (++index < objLength) { - var key = objProps[index], - result = isLoose ? key in other : hasOwnProperty.call(other, key); - - if (result) { - var objValue = object[key], - othValue = other[key]; - - result = undefined; - if (customizer) { - result = isLoose - ? customizer(othValue, objValue, key) - : customizer(objValue, othValue, key); - } - if (result === undefined) { - // Recursively compare objects (susceptible to call stack limits). - result = (objValue && objValue === othValue) || equalFunc(objValue, othValue, customizer, isLoose, stackA, stackB); - } - } - if (!result) { - return false; - } - skipCtor || (skipCtor = key == 'constructor'); - } - if (!skipCtor) { - var objCtor = object.constructor, - othCtor = other.constructor; - - // Non `Object` object instances with different constructors are not equal. - if (objCtor != othCtor && - ('constructor' in object && 'constructor' in other) && - !(typeof objCtor == 'function' && objCtor instanceof objCtor && - typeof othCtor == 'function' && othCtor instanceof othCtor)) { - return false; - } - } - return true; - } - - /** - * Gets the extremum value of `collection` invoking `iteratee` for each value - * in `collection` to generate the criterion by which the value is ranked. - * The `iteratee` is invoked with three arguments: (value, index, collection). - * - * @private - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} iteratee The function invoked per iteration. - * @param {boolean} [isMin] Specify returning the minimum, instead of the - * maximum, extremum value. - * @returns {*} Returns the extremum value. - */ - function extremumBy(collection, iteratee, isMin) { - var exValue = isMin ? POSITIVE_INFINITY : NEGATIVE_INFINITY, - computed = exValue, - result = computed; - - baseEach(collection, function(value, index, collection) { - var current = iteratee(value, index, collection); - if ((isMin ? (current < computed) : (current > computed)) || - (current === exValue && current === result)) { - computed = current; - result = value; - } - }); - return result; - } - - /** - * Gets the appropriate "callback" function. If the `_.callback` method is - * customized this function returns the custom method, otherwise it returns - * the `baseCallback` function. If arguments are provided the chosen function - * is invoked with them and its result is returned. - * - * @private - * @returns {Function} Returns the chosen function or its result. - */ - function getCallback(func, thisArg, argCount) { - var result = lodash.callback || callback; - result = result === callback ? baseCallback : result; - return argCount ? result(func, thisArg, argCount) : result; - } - - /** - * Gets metadata for `func`. - * - * @private - * @param {Function} func The function to query. - * @returns {*} Returns the metadata for `func`. - */ - var getData = !metaMap ? noop : function(func) { - return metaMap.get(func); - }; - - /** - * Gets the name of `func`. - * - * @private - * @param {Function} func The function to query. - * @returns {string} Returns the function name. - */ - var getFuncName = (function() { - if (!support.funcNames) { - return constant(''); - } - if (constant.name == 'constant') { - return baseProperty('name'); - } - return function(func) { - var result = func.name, - array = realNames[result], - length = array ? array.length : 0; - - while (length--) { - var data = array[length], - otherFunc = data.func; - - if (otherFunc == null || otherFunc == func) { - return data.name; - } - } - return result; - }; - }()); - - /** - * Gets the appropriate "indexOf" function. If the `_.indexOf` method is - * customized this function returns the custom method, otherwise it returns - * the `baseIndexOf` function. If arguments are provided the chosen function - * is invoked with them and its result is returned. - * - * @private - * @returns {Function|number} Returns the chosen function or its result. - */ - function getIndexOf(collection, target, fromIndex) { - var result = lodash.indexOf || indexOf; - result = result === indexOf ? baseIndexOf : result; - return collection ? result(collection, target, fromIndex) : result; - } - - /** - * Gets the "length" property value of `object`. - * - * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) - * in Safari on iOS 8.1 ARM64. - * - * @private - * @param {Object} object The object to query. - * @returns {*} Returns the "length" value. - */ - var getLength = baseProperty('length'); - - /** - * Creates an array of the own symbols of `object`. - * - * @private - * @param {Object} object The object to query. - * @returns {Array} Returns the array of symbols. - */ - var getSymbols = !getOwnPropertySymbols ? constant([]) : function(object) { - return getOwnPropertySymbols(toObject(object)); - }; - - /** - * Gets the view, applying any `transforms` to the `start` and `end` positions. - * - * @private - * @param {number} start The start of the view. - * @param {number} end The end of the view. - * @param {Array} [transforms] The transformations to apply to the view. - * @returns {Object} Returns an object containing the `start` and `end` - * positions of the view. - */ - function getView(start, end, transforms) { - var index = -1, - length = transforms ? transforms.length : 0; - - while (++index < length) { - var data = transforms[index], - size = data.size; - - switch (data.type) { - case 'drop': start += size; break; - case 'dropRight': end -= size; break; - case 'take': end = nativeMin(end, start + size); break; - case 'takeRight': start = nativeMax(start, end - size); break; - } - } - return { 'start': start, 'end': end }; - } - - /** - * Initializes an array clone. - * - * @private - * @param {Array} array The array to clone. - * @returns {Array} Returns the initialized clone. - */ - function initCloneArray(array) { - var length = array.length, - result = new array.constructor(length); - - // Add array properties assigned by `RegExp#exec`. - if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) { - result.index = array.index; - result.input = array.input; - } - return result; - } - - /** - * Initializes an object clone. - * - * @private - * @param {Object} object The object to clone. - * @returns {Object} Returns the initialized clone. - */ - function initCloneObject(object) { - var Ctor = object.constructor; - if (!(typeof Ctor == 'function' && Ctor instanceof Ctor)) { - Ctor = Object; - } - return new Ctor; - } - - /** - * Initializes an object clone based on its `toStringTag`. - * - * **Note:** This function only supports cloning values with tags of - * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. - * - * @private - * @param {Object} object The object to clone. - * @param {string} tag The `toStringTag` of the object to clone. - * @param {boolean} [isDeep] Specify a deep clone. - * @returns {Object} Returns the initialized clone. - */ - function initCloneByTag(object, tag, isDeep) { - var Ctor = object.constructor; - switch (tag) { - case arrayBufferTag: - return bufferClone(object); - - case boolTag: - case dateTag: - return new Ctor(+object); - - case float32Tag: case float64Tag: - case int8Tag: case int16Tag: case int32Tag: - case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag: - var buffer = object.buffer; - return new Ctor(isDeep ? bufferClone(buffer) : buffer, object.byteOffset, object.length); - - case numberTag: - case stringTag: - return new Ctor(object); - - case regexpTag: - var result = new Ctor(object.source, reFlags.exec(object)); - result.lastIndex = object.lastIndex; - } - return result; - } - - /** - * Invokes the method at `path` on `object`. - * - * @private - * @param {Object} object The object to query. - * @param {Array|string} path The path of the method to invoke. - * @param {Array} args The arguments to invoke the method with. - * @returns {*} Returns the result of the invoked method. - */ - function invokePath(object, path, args) { - if (object != null && !isKey(path, object)) { - path = toPath(path); - object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1)); - path = last(path); - } - var func = object == null ? object : object[path]; - return func == null ? undefined : func.apply(object, args); - } - - /** - * Checks if `value` is a valid array-like index. - * - * @private - * @param {*} value The value to check. - * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index. - * @returns {boolean} Returns `true` if `value` is a valid index, else `false`. - */ - function isIndex(value, length) { - value = +value; - length = length == null ? MAX_SAFE_INTEGER : length; - return value > -1 && value % 1 == 0 && value < length; - } - - /** - * Checks if the provided arguments are from an iteratee call. - * - * @private - * @param {*} value The potential iteratee value argument. - * @param {*} index The potential iteratee index or key argument. - * @param {*} object The potential iteratee object argument. - * @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`. - */ - function isIterateeCall(value, index, object) { - if (!isObject(object)) { - return false; - } - var type = typeof index; - if (type == 'number') { - var length = getLength(object), - prereq = isLength(length) && isIndex(index, length); - } else { - prereq = type == 'string' && index in object; - } - if (prereq) { - var other = object[index]; - return value === value ? (value === other) : (other !== other); - } - return false; - } - - /** - * Checks if `value` is a property name and not a property path. - * - * @private - * @param {*} value The value to check. - * @param {Object} [object] The object to query keys on. - * @returns {boolean} Returns `true` if `value` is a property name, else `false`. - */ - function isKey(value, object) { - var type = typeof value; - if ((type == 'string' && reIsPlainProp.test(value)) || type == 'number') { - return true; - } - if (isArray(value)) { - return false; - } - var result = !reIsDeepProp.test(value); - return result || (object != null && value in toObject(object)); - } - - /** - * Checks if `func` has a lazy counterpart. - * - * @private - * @param {Function} func The function to check. - * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`. - */ - function isLaziable(func) { - var funcName = getFuncName(func); - return !!funcName && func === lodash[funcName] && funcName in LazyWrapper.prototype; - } - - /** - * Checks if `value` is a valid array-like length. - * - * **Note:** This function is based on [`ToLength`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength). - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a valid length, else `false`. - */ - function isLength(value) { - return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; - } - - /** - * Checks if `value` is suitable for strict equality comparisons, i.e. `===`. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` if suitable for strict - * equality comparisons, else `false`. - */ - function isStrictComparable(value) { - return value === value && (value === 0 ? ((1 / value) > 0) : !isObject(value)); - } - - /** - * Merges the function metadata of `source` into `data`. - * - * Merging metadata reduces the number of wrappers required to invoke a function. - * This is possible because methods like `_.bind`, `_.curry`, and `_.partial` - * may be applied regardless of execution order. Methods like `_.ary` and `_.rearg` - * augment function arguments, making the order in which they are executed important, - * preventing the merging of metadata. However, we make an exception for a safe - * common case where curried functions have `_.ary` and or `_.rearg` applied. - * - * @private - * @param {Array} data The destination metadata. - * @param {Array} source The source metadata. - * @returns {Array} Returns `data`. - */ - function mergeData(data, source) { - var bitmask = data[1], - srcBitmask = source[1], - newBitmask = bitmask | srcBitmask, - isCommon = newBitmask < ARY_FLAG; - - var isCombo = - (srcBitmask == ARY_FLAG && bitmask == CURRY_FLAG) || - (srcBitmask == ARY_FLAG && bitmask == REARG_FLAG && data[7].length <= source[8]) || - (srcBitmask == (ARY_FLAG | REARG_FLAG) && bitmask == CURRY_FLAG); - - // Exit early if metadata can't be merged. - if (!(isCommon || isCombo)) { - return data; - } - // Use source `thisArg` if available. - if (srcBitmask & BIND_FLAG) { - data[2] = source[2]; - // Set when currying a bound function. - newBitmask |= (bitmask & BIND_FLAG) ? 0 : CURRY_BOUND_FLAG; - } - // Compose partial arguments. - var value = source[3]; - if (value) { - var partials = data[3]; - data[3] = partials ? composeArgs(partials, value, source[4]) : arrayCopy(value); - data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : arrayCopy(source[4]); - } - // Compose partial right arguments. - value = source[5]; - if (value) { - partials = data[5]; - data[5] = partials ? composeArgsRight(partials, value, source[6]) : arrayCopy(value); - data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : arrayCopy(source[6]); - } - // Use source `argPos` if available. - value = source[7]; - if (value) { - data[7] = arrayCopy(value); - } - // Use source `ary` if it's smaller. - if (srcBitmask & ARY_FLAG) { - data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]); - } - // Use source `arity` if one is not provided. - if (data[9] == null) { - data[9] = source[9]; - } - // Use source `func` and merge bitmasks. - data[0] = source[0]; - data[1] = newBitmask; - - return data; - } - - /** - * A specialized version of `_.pick` that picks `object` properties specified - * by `props`. - * - * @private - * @param {Object} object The source object. - * @param {string[]} props The property names to pick. - * @returns {Object} Returns the new object. - */ - function pickByArray(object, props) { - object = toObject(object); - - var index = -1, - length = props.length, - result = {}; - - while (++index < length) { - var key = props[index]; - if (key in object) { - result[key] = object[key]; - } - } - return result; - } - - /** - * A specialized version of `_.pick` that picks `object` properties `predicate` - * returns truthy for. - * - * @private - * @param {Object} object The source object. - * @param {Function} predicate The function invoked per iteration. - * @returns {Object} Returns the new object. - */ - function pickByCallback(object, predicate) { - var result = {}; - baseForIn(object, function(value, key, object) { - if (predicate(value, key, object)) { - result[key] = value; - } - }); - return result; - } - - /** - * Reorder `array` according to the specified indexes where the element at - * the first index is assigned as the first element, the element at - * the second index is assigned as the second element, and so on. - * - * @private - * @param {Array} array The array to reorder. - * @param {Array} indexes The arranged array indexes. - * @returns {Array} Returns `array`. - */ - function reorder(array, indexes) { - var arrLength = array.length, - length = nativeMin(indexes.length, arrLength), - oldArray = arrayCopy(array); - - while (length--) { - var index = indexes[length]; - array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined; - } - return array; - } - - /** - * Sets metadata for `func`. - * - * **Note:** If this function becomes hot, i.e. is invoked a lot in a short - * period of time, it will trip its breaker and transition to an identity function - * to avoid garbage collection pauses in V8. See [V8 issue 2070](https://code.google.com/p/v8/issues/detail?id=2070) - * for more details. - * - * @private - * @param {Function} func The function to associate metadata with. - * @param {*} data The metadata. - * @returns {Function} Returns `func`. - */ - var setData = (function() { - var count = 0, - lastCalled = 0; - - return function(key, value) { - var stamp = now(), - remaining = HOT_SPAN - (stamp - lastCalled); - - lastCalled = stamp; - if (remaining > 0) { - if (++count >= HOT_COUNT) { - return key; - } - } else { - count = 0; - } - return baseSetData(key, value); - }; - }()); - - /** - * A fallback implementation of `_.isPlainObject` which checks if `value` - * is an object created by the `Object` constructor or has a `[[Prototype]]` - * of `null`. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. - */ - function shimIsPlainObject(value) { - var Ctor, - support = lodash.support; - - // Exit early for non `Object` objects. - if (!(isObjectLike(value) && objToString.call(value) == objectTag) || - (!hasOwnProperty.call(value, 'constructor') && - (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) { - return false; - } - // IE < 9 iterates inherited properties before own properties. If the first - // iterated property is an object's own property then there are no inherited - // enumerable properties. - var result; - // In most environments an object's own properties are iterated before - // its inherited properties. If the last iterated property is an object's - // own property then there are no inherited enumerable properties. - baseForIn(value, function(subValue, key) { - result = key; - }); - return result === undefined || hasOwnProperty.call(value, result); - } - - /** - * A fallback implementation of `Object.keys` which creates an array of the - * own enumerable property names of `object`. - * - * @private - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property names. - */ - function shimKeys(object) { - var props = keysIn(object), - propsLength = props.length, - length = propsLength && object.length, - support = lodash.support; - - var allowIndexes = length && isLength(length) && - (isArray(object) || (support.nonEnumArgs && isArguments(object))); - - var index = -1, - result = []; - - while (++index < propsLength) { - var key = props[index]; - if ((allowIndexes && isIndex(key, length)) || hasOwnProperty.call(object, key)) { - result.push(key); - } - } - return result; - } - - /** - * Converts `value` to an array-like object if it is not one. - * - * @private - * @param {*} value The value to process. - * @returns {Array|Object} Returns the array-like object. - */ - function toIterable(value) { - if (value == null) { - return []; - } - if (!isLength(getLength(value))) { - return values(value); - } - return isObject(value) ? value : Object(value); - } - - /** - * Converts `value` to an object if it is not one. - * - * @private - * @param {*} value The value to process. - * @returns {Object} Returns the object. - */ - function toObject(value) { - return isObject(value) ? value : Object(value); - } - - /** - * Converts `value` to property path array if it is not one. - * - * @private - * @param {*} value The value to process. - * @returns {Array} Returns the property path array. - */ - function toPath(value) { - if (isArray(value)) { - return value; - } - var result = []; - baseToString(value).replace(rePropName, function(match, number, quote, string) { - result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match)); - }); - return result; - } - - /** - * Creates a clone of `wrapper`. - * - * @private - * @param {Object} wrapper The wrapper to clone. - * @returns {Object} Returns the cloned wrapper. - */ - function wrapperClone(wrapper) { - return wrapper instanceof LazyWrapper - ? wrapper.clone() - : new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__, arrayCopy(wrapper.__actions__)); - } - - /*------------------------------------------------------------------------*/ - - /** - * Creates an array of elements split into groups the length of `size`. - * If `collection` can't be split evenly, the final chunk will be the remaining - * elements. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to process. - * @param {number} [size=1] The length of each chunk. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the new array containing chunks. - * @example - * - * _.chunk(['a', 'b', 'c', 'd'], 2); - * // => [['a', 'b'], ['c', 'd']] - * - * _.chunk(['a', 'b', 'c', 'd'], 3); - * // => [['a', 'b', 'c'], ['d']] - */ - function chunk(array, size, guard) { - if (guard ? isIterateeCall(array, size, guard) : size == null) { - size = 1; - } else { - size = nativeMax(+size || 1, 1); - } - var index = 0, - length = array ? array.length : 0, - resIndex = -1, - result = Array(ceil(length / size)); - - while (index < length) { - result[++resIndex] = baseSlice(array, index, (index += size)); - } - return result; - } - - /** - * Creates an array with all falsey values removed. The values `false`, `null`, - * `0`, `""`, `undefined`, and `NaN` are falsey. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to compact. - * @returns {Array} Returns the new array of filtered values. - * @example - * - * _.compact([0, 1, false, 2, '', 3]); - * // => [1, 2, 3] - */ - function compact(array) { - var index = -1, - length = array ? array.length : 0, - resIndex = -1, - result = []; - - while (++index < length) { - var value = array[index]; - if (value) { - result[++resIndex] = value; - } - } - return result; - } - - /** - * Creates an array excluding all values of the provided arrays using - * `SameValueZero` for equality comparisons. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to inspect. - * @param {...Array} [values] The arrays of values to exclude. - * @returns {Array} Returns the new array of filtered values. - * @example - * - * _.difference([1, 2, 3], [4, 2]); - * // => [1, 3] - */ - var difference = restParam(function(array, values) { - return (isArray(array) || isArguments(array)) - ? baseDifference(array, baseFlatten(values, false, true)) - : []; - }); - - /** - * Creates a slice of `array` with `n` elements dropped from the beginning. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {number} [n=1] The number of elements to drop. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.drop([1, 2, 3]); - * // => [2, 3] - * - * _.drop([1, 2, 3], 2); - * // => [3] - * - * _.drop([1, 2, 3], 5); - * // => [] - * - * _.drop([1, 2, 3], 0); - * // => [1, 2, 3] - */ - function drop(array, n, guard) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (guard ? isIterateeCall(array, n, guard) : n == null) { - n = 1; - } - return baseSlice(array, n < 0 ? 0 : n); - } - - /** - * Creates a slice of `array` with `n` elements dropped from the end. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {number} [n=1] The number of elements to drop. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.dropRight([1, 2, 3]); - * // => [1, 2] - * - * _.dropRight([1, 2, 3], 2); - * // => [1] - * - * _.dropRight([1, 2, 3], 5); - * // => [] - * - * _.dropRight([1, 2, 3], 0); - * // => [1, 2, 3] - */ - function dropRight(array, n, guard) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (guard ? isIterateeCall(array, n, guard) : n == null) { - n = 1; - } - n = length - (+n || 0); - return baseSlice(array, 0, n < 0 ? 0 : n); - } - - /** - * Creates a slice of `array` excluding elements dropped from the end. - * Elements are dropped until `predicate` returns falsey. The predicate is - * bound to `thisArg` and invoked with three arguments: (value, index, array). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that match the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.dropRightWhile([1, 2, 3], function(n) { - * return n > 1; - * }); - * // => [1] - * - * var users = [ - * { 'user': 'barney', 'active': true }, - * { 'user': 'fred', 'active': false }, - * { 'user': 'pebbles', 'active': false } - * ]; - * - * // using the `_.matches` callback shorthand - * _.pluck(_.dropRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user'); - * // => ['barney', 'fred'] - * - * // using the `_.matchesProperty` callback shorthand - * _.pluck(_.dropRightWhile(users, 'active', false), 'user'); - * // => ['barney'] - * - * // using the `_.property` callback shorthand - * _.pluck(_.dropRightWhile(users, 'active'), 'user'); - * // => ['barney', 'fred', 'pebbles'] - */ - function dropRightWhile(array, predicate, thisArg) { - return (array && array.length) - ? baseWhile(array, getCallback(predicate, thisArg, 3), true, true) - : []; - } - - /** - * Creates a slice of `array` excluding elements dropped from the beginning. - * Elements are dropped until `predicate` returns falsey. The predicate is - * bound to `thisArg` and invoked with three arguments: (value, index, array). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.dropWhile([1, 2, 3], function(n) { - * return n < 3; - * }); - * // => [3] - * - * var users = [ - * { 'user': 'barney', 'active': false }, - * { 'user': 'fred', 'active': false }, - * { 'user': 'pebbles', 'active': true } - * ]; - * - * // using the `_.matches` callback shorthand - * _.pluck(_.dropWhile(users, { 'user': 'barney', 'active': false }), 'user'); - * // => ['fred', 'pebbles'] - * - * // using the `_.matchesProperty` callback shorthand - * _.pluck(_.dropWhile(users, 'active', false), 'user'); - * // => ['pebbles'] - * - * // using the `_.property` callback shorthand - * _.pluck(_.dropWhile(users, 'active'), 'user'); - * // => ['barney', 'fred', 'pebbles'] - */ - function dropWhile(array, predicate, thisArg) { - return (array && array.length) - ? baseWhile(array, getCallback(predicate, thisArg, 3), true) - : []; - } - - /** - * Fills elements of `array` with `value` from `start` up to, but not - * including, `end`. - * - * **Note:** This method mutates `array`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to fill. - * @param {*} value The value to fill `array` with. - * @param {number} [start=0] The start position. - * @param {number} [end=array.length] The end position. - * @returns {Array} Returns `array`. - * @example - * - * var array = [1, 2, 3]; - * - * _.fill(array, 'a'); - * console.log(array); - * // => ['a', 'a', 'a'] - * - * _.fill(Array(3), 2); - * // => [2, 2, 2] - * - * _.fill([4, 6, 8], '*', 1, 2); - * // => [4, '*', 8] - */ - function fill(array, value, start, end) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (start && typeof start != 'number' && isIterateeCall(array, value, start)) { - start = 0; - end = length; - } - return baseFill(array, value, start, end); - } - - /** - * This method is like `_.find` except that it returns the index of the first - * element `predicate` returns truthy for instead of the element itself. - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to search. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {number} Returns the index of the found element, else `-1`. - * @example - * - * var users = [ - * { 'user': 'barney', 'active': false }, - * { 'user': 'fred', 'active': false }, - * { 'user': 'pebbles', 'active': true } - * ]; - * - * _.findIndex(users, function(chr) { - * return chr.user == 'barney'; - * }); - * // => 0 - * - * // using the `_.matches` callback shorthand - * _.findIndex(users, { 'user': 'fred', 'active': false }); - * // => 1 - * - * // using the `_.matchesProperty` callback shorthand - * _.findIndex(users, 'active', false); - * // => 0 - * - * // using the `_.property` callback shorthand - * _.findIndex(users, 'active'); - * // => 2 - */ - var findIndex = createFindIndex(); - - /** - * This method is like `_.findIndex` except that it iterates over elements - * of `collection` from right to left. - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to search. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {number} Returns the index of the found element, else `-1`. - * @example - * - * var users = [ - * { 'user': 'barney', 'active': true }, - * { 'user': 'fred', 'active': false }, - * { 'user': 'pebbles', 'active': false } - * ]; - * - * _.findLastIndex(users, function(chr) { - * return chr.user == 'pebbles'; - * }); - * // => 2 - * - * // using the `_.matches` callback shorthand - * _.findLastIndex(users, { 'user': 'barney', 'active': true }); - * // => 0 - * - * // using the `_.matchesProperty` callback shorthand - * _.findLastIndex(users, 'active', false); - * // => 2 - * - * // using the `_.property` callback shorthand - * _.findLastIndex(users, 'active'); - * // => 0 - */ - var findLastIndex = createFindIndex(true); - - /** - * Gets the first element of `array`. - * - * @static - * @memberOf _ - * @alias head - * @category Array - * @param {Array} array The array to query. - * @returns {*} Returns the first element of `array`. - * @example - * - * _.first([1, 2, 3]); - * // => 1 - * - * _.first([]); - * // => undefined - */ - function first(array) { - return array ? array[0] : undefined; - } - - /** - * Flattens a nested array. If `isDeep` is `true` the array is recursively - * flattened, otherwise it is only flattened a single level. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to flatten. - * @param {boolean} [isDeep] Specify a deep flatten. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the new flattened array. - * @example - * - * _.flatten([1, [2, 3, [4]]]); - * // => [1, 2, 3, [4]] - * - * // using `isDeep` - * _.flatten([1, [2, 3, [4]]], true); - * // => [1, 2, 3, 4] - */ - function flatten(array, isDeep, guard) { - var length = array ? array.length : 0; - if (guard && isIterateeCall(array, isDeep, guard)) { - isDeep = false; - } - return length ? baseFlatten(array, isDeep) : []; - } - - /** - * Recursively flattens a nested array. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to recursively flatten. - * @returns {Array} Returns the new flattened array. - * @example - * - * _.flattenDeep([1, [2, 3, [4]]]); - * // => [1, 2, 3, 4] - */ - function flattenDeep(array) { - var length = array ? array.length : 0; - return length ? baseFlatten(array, true) : []; - } - - /** - * Gets the index at which the first occurrence of `value` is found in `array` - * using `SameValueZero` for equality comparisons. If `fromIndex` is negative, - * it is used as the offset from the end of `array`. If `array` is sorted - * providing `true` for `fromIndex` performs a faster binary search. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {boolean|number} [fromIndex=0] The index to search from or `true` - * to perform a binary search on a sorted array. - * @returns {number} Returns the index of the matched value, else `-1`. - * @example - * - * _.indexOf([1, 2, 1, 2], 2); - * // => 1 - * - * // using `fromIndex` - * _.indexOf([1, 2, 1, 2], 2, 2); - * // => 3 - * - * // performing a binary search - * _.indexOf([1, 1, 2, 2], 2, true); - * // => 2 - */ - function indexOf(array, value, fromIndex) { - var length = array ? array.length : 0; - if (!length) { - return -1; - } - if (typeof fromIndex == 'number') { - fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex; - } else if (fromIndex) { - var index = binaryIndex(array, value), - other = array[index]; - - if (value === value ? (value === other) : (other !== other)) { - return index; - } - return -1; - } - return baseIndexOf(array, value, fromIndex || 0); - } - - /** - * Gets all but the last element of `array`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.initial([1, 2, 3]); - * // => [1, 2] - */ - function initial(array) { - return dropRight(array, 1); - } - - /** - * Creates an array of unique values in all provided arrays using `SameValueZero` - * for equality comparisons. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @category Array - * @param {...Array} [arrays] The arrays to inspect. - * @returns {Array} Returns the new array of shared values. - * @example - * _.intersection([1, 2], [4, 2], [2, 1]); - * // => [2] - */ - function intersection() { - var args = [], - argsIndex = -1, - argsLength = arguments.length, - caches = [], - indexOf = getIndexOf(), - isCommon = indexOf == baseIndexOf, - result = []; - - while (++argsIndex < argsLength) { - var value = arguments[argsIndex]; - if (isArray(value) || isArguments(value)) { - args.push(value); - caches.push((isCommon && value.length >= 120) ? createCache(argsIndex && value) : null); - } - } - argsLength = args.length; - if (argsLength < 2) { - return result; - } - var array = args[0], - index = -1, - length = array ? array.length : 0, - seen = caches[0]; - - outer: - while (++index < length) { - value = array[index]; - if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value, 0)) < 0) { - argsIndex = argsLength; - while (--argsIndex) { - var cache = caches[argsIndex]; - if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value, 0)) < 0) { - continue outer; - } - } - if (seen) { - seen.push(value); - } - result.push(value); - } - } - return result; - } - - /** - * Gets the last element of `array`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @returns {*} Returns the last element of `array`. - * @example - * - * _.last([1, 2, 3]); - * // => 3 - */ - function last(array) { - var length = array ? array.length : 0; - return length ? array[length - 1] : undefined; - } - - /** - * This method is like `_.indexOf` except that it iterates over elements of - * `array` from right to left. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {boolean|number} [fromIndex=array.length-1] The index to search from - * or `true` to perform a binary search on a sorted array. - * @returns {number} Returns the index of the matched value, else `-1`. - * @example - * - * _.lastIndexOf([1, 2, 1, 2], 2); - * // => 3 - * - * // using `fromIndex` - * _.lastIndexOf([1, 2, 1, 2], 2, 2); - * // => 1 - * - * // performing a binary search - * _.lastIndexOf([1, 1, 2, 2], 2, true); - * // => 3 - */ - function lastIndexOf(array, value, fromIndex) { - var length = array ? array.length : 0; - if (!length) { - return -1; - } - var index = length; - if (typeof fromIndex == 'number') { - index = (fromIndex < 0 ? nativeMax(length + fromIndex, 0) : nativeMin(fromIndex || 0, length - 1)) + 1; - } else if (fromIndex) { - index = binaryIndex(array, value, true) - 1; - var other = array[index]; - if (value === value ? (value === other) : (other !== other)) { - return index; - } - return -1; - } - if (value !== value) { - return indexOfNaN(array, index, true); - } - while (index--) { - if (array[index] === value) { - return index; - } - } - return -1; - } - - /** - * Removes all provided values from `array` using `SameValueZero` for equality - * comparisons. - * - * **Notes:** - * - Unlike `_.without`, this method mutates `array` - * - [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except - * that `NaN` matches `NaN` - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to modify. - * @param {...*} [values] The values to remove. - * @returns {Array} Returns `array`. - * @example - * - * var array = [1, 2, 3, 1, 2, 3]; - * - * _.pull(array, 2, 3); - * console.log(array); - * // => [1, 1] - */ - function pull() { - var args = arguments, - array = args[0]; - - if (!(array && array.length)) { - return array; - } - var index = 0, - indexOf = getIndexOf(), - length = args.length; - - while (++index < length) { - var fromIndex = 0, - value = args[index]; - - while ((fromIndex = indexOf(array, value, fromIndex)) > -1) { - splice.call(array, fromIndex, 1); - } - } - return array; - } - - /** - * Removes elements from `array` corresponding to the given indexes and returns - * an array of the removed elements. Indexes may be specified as an array of - * indexes or as individual arguments. - * - * **Note:** Unlike `_.at`, this method mutates `array`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to modify. - * @param {...(number|number[])} [indexes] The indexes of elements to remove, - * specified as individual indexes or arrays of indexes. - * @returns {Array} Returns the new array of removed elements. - * @example - * - * var array = [5, 10, 15, 20]; - * var evens = _.pullAt(array, 1, 3); - * - * console.log(array); - * // => [5, 15] - * - * console.log(evens); - * // => [10, 20] - */ - var pullAt = restParam(function(array, indexes) { - array || (array = []); - indexes = baseFlatten(indexes); - - var result = baseAt(array, indexes); - basePullAt(array, indexes.sort(baseCompareAscending)); - return result; - }); - - /** - * Removes all elements from `array` that `predicate` returns truthy for - * and returns an array of the removed elements. The predicate is bound to - * `thisArg` and invoked with three arguments: (value, index, array). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * **Note:** Unlike `_.filter`, this method mutates `array`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to modify. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the new array of removed elements. - * @example - * - * var array = [1, 2, 3, 4]; - * var evens = _.remove(array, function(n) { - * return n % 2 == 0; - * }); - * - * console.log(array); - * // => [1, 3] - * - * console.log(evens); - * // => [2, 4] - */ - function remove(array, predicate, thisArg) { - var result = []; - if (!(array && array.length)) { - return result; - } - var index = -1, - indexes = [], - length = array.length; - - predicate = getCallback(predicate, thisArg, 3); - while (++index < length) { - var value = array[index]; - if (predicate(value, index, array)) { - result.push(value); - indexes.push(index); - } - } - basePullAt(array, indexes); - return result; - } - - /** - * Gets all but the first element of `array`. - * - * @static - * @memberOf _ - * @alias tail - * @category Array - * @param {Array} array The array to query. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.rest([1, 2, 3]); - * // => [2, 3] - */ - function rest(array) { - return drop(array, 1); - } - - /** - * Creates a slice of `array` from `start` up to, but not including, `end`. - * - * **Note:** This method is used instead of `Array#slice` to support node - * lists in IE < 9 and to ensure dense arrays are returned. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to slice. - * @param {number} [start=0] The start position. - * @param {number} [end=array.length] The end position. - * @returns {Array} Returns the slice of `array`. - */ - function slice(array, start, end) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (end && typeof end != 'number' && isIterateeCall(array, start, end)) { - start = 0; - end = length; - } - return baseSlice(array, start, end); - } - - /** - * Uses a binary search to determine the lowest index at which `value` should - * be inserted into `array` in order to maintain its sort order. If an iteratee - * function is provided it is invoked for `value` and each element of `array` - * to compute their sort ranking. The iteratee is bound to `thisArg` and - * invoked with one argument; (value). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The sorted array to inspect. - * @param {*} value The value to evaluate. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {number} Returns the index at which `value` should be inserted - * into `array`. - * @example - * - * _.sortedIndex([30, 50], 40); - * // => 1 - * - * _.sortedIndex([4, 4, 5, 5], 5); - * // => 2 - * - * var dict = { 'data': { 'thirty': 30, 'forty': 40, 'fifty': 50 } }; - * - * // using an iteratee function - * _.sortedIndex(['thirty', 'fifty'], 'forty', function(word) { - * return this.data[word]; - * }, dict); - * // => 1 - * - * // using the `_.property` callback shorthand - * _.sortedIndex([{ 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x'); - * // => 1 - */ - var sortedIndex = createSortedIndex(); - - /** - * This method is like `_.sortedIndex` except that it returns the highest - * index at which `value` should be inserted into `array` in order to - * maintain its sort order. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The sorted array to inspect. - * @param {*} value The value to evaluate. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {number} Returns the index at which `value` should be inserted - * into `array`. - * @example - * - * _.sortedLastIndex([4, 4, 5, 5], 5); - * // => 4 - */ - var sortedLastIndex = createSortedIndex(true); - - /** - * Creates a slice of `array` with `n` elements taken from the beginning. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {number} [n=1] The number of elements to take. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.take([1, 2, 3]); - * // => [1] - * - * _.take([1, 2, 3], 2); - * // => [1, 2] - * - * _.take([1, 2, 3], 5); - * // => [1, 2, 3] - * - * _.take([1, 2, 3], 0); - * // => [] - */ - function take(array, n, guard) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (guard ? isIterateeCall(array, n, guard) : n == null) { - n = 1; - } - return baseSlice(array, 0, n < 0 ? 0 : n); - } - - /** - * Creates a slice of `array` with `n` elements taken from the end. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {number} [n=1] The number of elements to take. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.takeRight([1, 2, 3]); - * // => [3] - * - * _.takeRight([1, 2, 3], 2); - * // => [2, 3] - * - * _.takeRight([1, 2, 3], 5); - * // => [1, 2, 3] - * - * _.takeRight([1, 2, 3], 0); - * // => [] - */ - function takeRight(array, n, guard) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (guard ? isIterateeCall(array, n, guard) : n == null) { - n = 1; - } - n = length - (+n || 0); - return baseSlice(array, n < 0 ? 0 : n); - } - - /** - * Creates a slice of `array` with elements taken from the end. Elements are - * taken until `predicate` returns falsey. The predicate is bound to `thisArg` - * and invoked with three arguments: (value, index, array). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.takeRightWhile([1, 2, 3], function(n) { - * return n > 1; - * }); - * // => [2, 3] - * - * var users = [ - * { 'user': 'barney', 'active': true }, - * { 'user': 'fred', 'active': false }, - * { 'user': 'pebbles', 'active': false } - * ]; - * - * // using the `_.matches` callback shorthand - * _.pluck(_.takeRightWhile(users, { 'user': 'pebbles', 'active': false }), 'user'); - * // => ['pebbles'] - * - * // using the `_.matchesProperty` callback shorthand - * _.pluck(_.takeRightWhile(users, 'active', false), 'user'); - * // => ['fred', 'pebbles'] - * - * // using the `_.property` callback shorthand - * _.pluck(_.takeRightWhile(users, 'active'), 'user'); - * // => [] - */ - function takeRightWhile(array, predicate, thisArg) { - return (array && array.length) - ? baseWhile(array, getCallback(predicate, thisArg, 3), false, true) - : []; - } - - /** - * Creates a slice of `array` with elements taken from the beginning. Elements - * are taken until `predicate` returns falsey. The predicate is bound to - * `thisArg` and invoked with three arguments: (value, index, array). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to query. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the slice of `array`. - * @example - * - * _.takeWhile([1, 2, 3], function(n) { - * return n < 3; - * }); - * // => [1, 2] - * - * var users = [ - * { 'user': 'barney', 'active': false }, - * { 'user': 'fred', 'active': false}, - * { 'user': 'pebbles', 'active': true } - * ]; - * - * // using the `_.matches` callback shorthand - * _.pluck(_.takeWhile(users, { 'user': 'barney', 'active': false }), 'user'); - * // => ['barney'] - * - * // using the `_.matchesProperty` callback shorthand - * _.pluck(_.takeWhile(users, 'active', false), 'user'); - * // => ['barney', 'fred'] - * - * // using the `_.property` callback shorthand - * _.pluck(_.takeWhile(users, 'active'), 'user'); - * // => [] - */ - function takeWhile(array, predicate, thisArg) { - return (array && array.length) - ? baseWhile(array, getCallback(predicate, thisArg, 3)) - : []; - } - - /** - * Creates an array of unique values, in order, of the provided arrays using - * `SameValueZero` for equality comparisons. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @category Array - * @param {...Array} [arrays] The arrays to inspect. - * @returns {Array} Returns the new array of combined values. - * @example - * - * _.union([1, 2], [4, 2], [2, 1]); - * // => [1, 2, 4] - */ - var union = restParam(function(arrays) { - return baseUniq(baseFlatten(arrays, false, true)); - }); - - /** - * Creates a duplicate-free version of an array, using `SameValueZero` for - * equality comparisons, in which only the first occurence of each element - * is kept. Providing `true` for `isSorted` performs a faster search algorithm - * for sorted arrays. If an iteratee function is provided it is invoked for - * each element in the array to generate the criterion by which uniqueness - * is computed. The `iteratee` is bound to `thisArg` and invoked with three - * arguments: (value, index, array). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @alias unique - * @category Array - * @param {Array} array The array to inspect. - * @param {boolean} [isSorted] Specify the array is sorted. - * @param {Function|Object|string} [iteratee] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Array} Returns the new duplicate-value-free array. - * @example - * - * _.uniq([2, 1, 2]); - * // => [2, 1] - * - * // using `isSorted` - * _.uniq([1, 1, 2], true); - * // => [1, 2] - * - * // using an iteratee function - * _.uniq([1, 2.5, 1.5, 2], function(n) { - * return this.floor(n); - * }, Math); - * // => [1, 2.5] - * - * // using the `_.property` callback shorthand - * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); - * // => [{ 'x': 1 }, { 'x': 2 }] - */ - function uniq(array, isSorted, iteratee, thisArg) { - var length = array ? array.length : 0; - if (!length) { - return []; - } - if (isSorted != null && typeof isSorted != 'boolean') { - thisArg = iteratee; - iteratee = isIterateeCall(array, isSorted, thisArg) ? null : isSorted; - isSorted = false; - } - var func = getCallback(); - if (!(func === baseCallback && iteratee == null)) { - iteratee = func(iteratee, thisArg, 3); - } - return (isSorted && getIndexOf() == baseIndexOf) - ? sortedUniq(array, iteratee) - : baseUniq(array, iteratee); - } - - /** - * This method is like `_.zip` except that it accepts an array of grouped - * elements and creates an array regrouping the elements to their pre-`_.zip` - * configuration. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array of grouped elements to process. - * @returns {Array} Returns the new array of regrouped elements. - * @example - * - * var zipped = _.zip(['fred', 'barney'], [30, 40], [true, false]); - * // => [['fred', 30, true], ['barney', 40, false]] - * - * _.unzip(zipped); - * // => [['fred', 'barney'], [30, 40], [true, false]] - */ - function unzip(array) { - var index = -1, - length = (array && array.length && arrayMax(arrayMap(array, getLength))) >>> 0, - result = Array(length); - - while (++index < length) { - result[index] = arrayMap(array, baseProperty(index)); - } - return result; - } - - /** - * Creates an array excluding all provided values using `SameValueZero` for - * equality comparisons. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @category Array - * @param {Array} array The array to filter. - * @param {...*} [values] The values to exclude. - * @returns {Array} Returns the new array of filtered values. - * @example - * - * _.without([1, 2, 1, 3], 1, 2); - * // => [3] - */ - var without = restParam(function(array, values) { - return (isArray(array) || isArguments(array)) - ? baseDifference(array, values) - : []; - }); - - /** - * Creates an array that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference) - * of the provided arrays. - * - * @static - * @memberOf _ - * @category Array - * @param {...Array} [arrays] The arrays to inspect. - * @returns {Array} Returns the new array of values. - * @example - * - * _.xor([1, 2], [4, 2]); - * // => [1, 4] - */ - function xor() { - var index = -1, - length = arguments.length; - - while (++index < length) { - var array = arguments[index]; - if (isArray(array) || isArguments(array)) { - var result = result - ? baseDifference(result, array).concat(baseDifference(array, result)) - : array; - } - } - return result ? baseUniq(result) : []; - } - - /** - * Creates an array of grouped elements, the first of which contains the first - * elements of the given arrays, the second of which contains the second elements - * of the given arrays, and so on. - * - * @static - * @memberOf _ - * @category Array - * @param {...Array} [arrays] The arrays to process. - * @returns {Array} Returns the new array of grouped elements. - * @example - * - * _.zip(['fred', 'barney'], [30, 40], [true, false]); - * // => [['fred', 30, true], ['barney', 40, false]] - */ - var zip = restParam(unzip); - - /** - * The inverse of `_.pairs`; this method returns an object composed from arrays - * of property names and values. Provide either a single two dimensional array, - * e.g. `[[key1, value1], [key2, value2]]` or two arrays, one of property names - * and one of corresponding values. - * - * @static - * @memberOf _ - * @alias object - * @category Array - * @param {Array} props The property names. - * @param {Array} [values=[]] The property values. - * @returns {Object} Returns the new object. - * @example - * - * _.zipObject([['fred', 30], ['barney', 40]]); - * // => { 'fred': 30, 'barney': 40 } - * - * _.zipObject(['fred', 'barney'], [30, 40]); - * // => { 'fred': 30, 'barney': 40 } - */ - function zipObject(props, values) { - var index = -1, - length = props ? props.length : 0, - result = {}; - - if (length && !values && !isArray(props[0])) { - values = []; - } - while (++index < length) { - var key = props[index]; - if (values) { - result[key] = values[index]; - } else if (key) { - result[key[0]] = key[1]; - } - } - return result; - } - - /*------------------------------------------------------------------------*/ - - /** - * Creates a `lodash` object that wraps `value` with explicit method - * chaining enabled. - * - * @static - * @memberOf _ - * @category Chain - * @param {*} value The value to wrap. - * @returns {Object} Returns the new `lodash` wrapper instance. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 40 }, - * { 'user': 'pebbles', 'age': 1 } - * ]; - * - * var youngest = _.chain(users) - * .sortBy('age') - * .map(function(chr) { - * return chr.user + ' is ' + chr.age; - * }) - * .first() - * .value(); - * // => 'pebbles is 1' - */ - function chain(value) { - var result = lodash(value); - result.__chain__ = true; - return result; - } - - /** - * This method invokes `interceptor` and returns `value`. The interceptor is - * bound to `thisArg` and invoked with one argument; (value). The purpose of - * this method is to "tap into" a method chain in order to perform operations - * on intermediate results within the chain. - * - * @static - * @memberOf _ - * @category Chain - * @param {*} value The value to provide to `interceptor`. - * @param {Function} interceptor The function to invoke. - * @param {*} [thisArg] The `this` binding of `interceptor`. - * @returns {*} Returns `value`. - * @example - * - * _([1, 2, 3]) - * .tap(function(array) { - * array.pop(); - * }) - * .reverse() - * .value(); - * // => [2, 1] - */ - function tap(value, interceptor, thisArg) { - interceptor.call(thisArg, value); - return value; - } - - /** - * This method is like `_.tap` except that it returns the result of `interceptor`. - * - * @static - * @memberOf _ - * @category Chain - * @param {*} value The value to provide to `interceptor`. - * @param {Function} interceptor The function to invoke. - * @param {*} [thisArg] The `this` binding of `interceptor`. - * @returns {*} Returns the result of `interceptor`. - * @example - * - * _(' abc ') - * .chain() - * .trim() - * .thru(function(value) { - * return [value]; - * }) - * .value(); - * // => ['abc'] - */ - function thru(value, interceptor, thisArg) { - return interceptor.call(thisArg, value); - } - - /** - * Enables explicit method chaining on the wrapper object. - * - * @name chain - * @memberOf _ - * @category Chain - * @returns {Object} Returns the new `lodash` wrapper instance. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 40 } - * ]; - * - * // without explicit chaining - * _(users).first(); - * // => { 'user': 'barney', 'age': 36 } - * - * // with explicit chaining - * _(users).chain() - * .first() - * .pick('user') - * .value(); - * // => { 'user': 'barney' } - */ - function wrapperChain() { - return chain(this); - } - - /** - * Executes the chained sequence and returns the wrapped result. - * - * @name commit - * @memberOf _ - * @category Chain - * @returns {Object} Returns the new `lodash` wrapper instance. - * @example - * - * var array = [1, 2]; - * var wrapper = _(array).push(3); - * - * console.log(array); - * // => [1, 2] - * - * wrapper = wrapper.commit(); - * console.log(array); - * // => [1, 2, 3] - * - * wrapper.last(); - * // => 3 - * - * console.log(array); - * // => [1, 2, 3] - */ - function wrapperCommit() { - return new LodashWrapper(this.value(), this.__chain__); - } - - /** - * Creates a clone of the chained sequence planting `value` as the wrapped value. - * - * @name plant - * @memberOf _ - * @category Chain - * @returns {Object} Returns the new `lodash` wrapper instance. - * @example - * - * var array = [1, 2]; - * var wrapper = _(array).map(function(value) { - * return Math.pow(value, 2); - * }); - * - * var other = [3, 4]; - * var otherWrapper = wrapper.plant(other); - * - * otherWrapper.value(); - * // => [9, 16] - * - * wrapper.value(); - * // => [1, 4] - */ - function wrapperPlant(value) { - var result, - parent = this; - - while (parent instanceof baseLodash) { - var clone = wrapperClone(parent); - if (result) { - previous.__wrapped__ = clone; - } else { - result = clone; - } - var previous = clone; - parent = parent.__wrapped__; - } - previous.__wrapped__ = value; - return result; - } - - /** - * Reverses the wrapped array so the first element becomes the last, the - * second element becomes the second to last, and so on. - * - * **Note:** This method mutates the wrapped array. - * - * @name reverse - * @memberOf _ - * @category Chain - * @returns {Object} Returns the new reversed `lodash` wrapper instance. - * @example - * - * var array = [1, 2, 3]; - * - * _(array).reverse().value() - * // => [3, 2, 1] - * - * console.log(array); - * // => [3, 2, 1] - */ - function wrapperReverse() { - var value = this.__wrapped__; - if (value instanceof LazyWrapper) { - if (this.__actions__.length) { - value = new LazyWrapper(this); - } - return new LodashWrapper(value.reverse(), this.__chain__); - } - return this.thru(function(value) { - return value.reverse(); - }); - } - - /** - * Produces the result of coercing the unwrapped value to a string. - * - * @name toString - * @memberOf _ - * @category Chain - * @returns {string} Returns the coerced string value. - * @example - * - * _([1, 2, 3]).toString(); - * // => '1,2,3' - */ - function wrapperToString() { - return (this.value() + ''); - } - - /** - * Executes the chained sequence to extract the unwrapped value. - * - * @name value - * @memberOf _ - * @alias run, toJSON, valueOf - * @category Chain - * @returns {*} Returns the resolved unwrapped value. - * @example - * - * _([1, 2, 3]).value(); - * // => [1, 2, 3] - */ - function wrapperValue() { - return baseWrapperValue(this.__wrapped__, this.__actions__); - } - - /*------------------------------------------------------------------------*/ - - /** - * Creates an array of elements corresponding to the given keys, or indexes, - * of `collection`. Keys may be specified as individual arguments or as arrays - * of keys. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {...(number|number[]|string|string[])} [props] The property names - * or indexes of elements to pick, specified individually or in arrays. - * @returns {Array} Returns the new array of picked elements. - * @example - * - * _.at(['a', 'b', 'c'], [0, 2]); - * // => ['a', 'c'] - * - * _.at(['barney', 'fred', 'pebbles'], 0, 2); - * // => ['barney', 'pebbles'] - */ - var at = restParam(function(collection, props) { - var length = collection ? getLength(collection) : 0; - if (isLength(length)) { - collection = toIterable(collection); - } - return baseAt(collection, baseFlatten(props)); - }); - - /** - * Creates an object composed of keys generated from the results of running - * each element of `collection` through `iteratee`. The corresponding value - * of each key is the number of times the key was returned by `iteratee`. - * The `iteratee` is bound to `thisArg` and invoked with three arguments: - * (value, index|key, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * _.countBy([4.3, 6.1, 6.4], function(n) { - * return Math.floor(n); - * }); - * // => { '4': 1, '6': 2 } - * - * _.countBy([4.3, 6.1, 6.4], function(n) { - * return this.floor(n); - * }, Math); - * // => { '4': 1, '6': 2 } - * - * _.countBy(['one', 'two', 'three'], 'length'); - * // => { '3': 2, '5': 1 } - */ - var countBy = createAggregator(function(result, value, key) { - hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1); - }); - - /** - * Checks if `predicate` returns truthy for **all** elements of `collection`. - * The predicate is bound to `thisArg` and invoked with three arguments: - * (value, index|key, collection). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @alias all - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {boolean} Returns `true` if all elements pass the predicate check, - * else `false`. - * @example - * - * _.every([true, 1, null, 'yes'], Boolean); - * // => false - * - * var users = [ - * { 'user': 'barney', 'active': false }, - * { 'user': 'fred', 'active': false } - * ]; - * - * // using the `_.matches` callback shorthand - * _.every(users, { 'user': 'barney', 'active': false }); - * // => false - * - * // using the `_.matchesProperty` callback shorthand - * _.every(users, 'active', false); - * // => true - * - * // using the `_.property` callback shorthand - * _.every(users, 'active'); - * // => false - */ - function every(collection, predicate, thisArg) { - var func = isArray(collection) ? arrayEvery : baseEvery; - if (thisArg && isIterateeCall(collection, predicate, thisArg)) { - predicate = null; - } - if (typeof predicate != 'function' || thisArg !== undefined) { - predicate = getCallback(predicate, thisArg, 3); - } - return func(collection, predicate); - } - - /** - * Iterates over elements of `collection`, returning an array of all elements - * `predicate` returns truthy for. The predicate is bound to `thisArg` and - * invoked with three arguments: (value, index|key, collection). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @alias select - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the new filtered array. - * @example - * - * _.filter([4, 5, 6], function(n) { - * return n % 2 == 0; - * }); - * // => [4, 6] - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': true }, - * { 'user': 'fred', 'age': 40, 'active': false } - * ]; - * - * // using the `_.matches` callback shorthand - * _.pluck(_.filter(users, { 'age': 36, 'active': true }), 'user'); - * // => ['barney'] - * - * // using the `_.matchesProperty` callback shorthand - * _.pluck(_.filter(users, 'active', false), 'user'); - * // => ['fred'] - * - * // using the `_.property` callback shorthand - * _.pluck(_.filter(users, 'active'), 'user'); - * // => ['barney'] - */ - function filter(collection, predicate, thisArg) { - var func = isArray(collection) ? arrayFilter : baseFilter; - predicate = getCallback(predicate, thisArg, 3); - return func(collection, predicate); - } - - /** - * Iterates over elements of `collection`, returning the first element - * `predicate` returns truthy for. The predicate is bound to `thisArg` and - * invoked with three arguments: (value, index|key, collection). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @alias detect - * @category Collection - * @param {Array|Object|string} collection The collection to search. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {*} Returns the matched element, else `undefined`. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': true }, - * { 'user': 'fred', 'age': 40, 'active': false }, - * { 'user': 'pebbles', 'age': 1, 'active': true } - * ]; - * - * _.result(_.find(users, function(chr) { - * return chr.age < 40; - * }), 'user'); - * // => 'barney' - * - * // using the `_.matches` callback shorthand - * _.result(_.find(users, { 'age': 1, 'active': true }), 'user'); - * // => 'pebbles' - * - * // using the `_.matchesProperty` callback shorthand - * _.result(_.find(users, 'active', false), 'user'); - * // => 'fred' - * - * // using the `_.property` callback shorthand - * _.result(_.find(users, 'active'), 'user'); - * // => 'barney' - */ - var find = createFind(baseEach); - - /** - * This method is like `_.find` except that it iterates over elements of - * `collection` from right to left. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to search. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {*} Returns the matched element, else `undefined`. - * @example - * - * _.findLast([1, 2, 3, 4], function(n) { - * return n % 2 == 1; - * }); - * // => 3 - */ - var findLast = createFind(baseEachRight, true); - - /** - * Performs a deep comparison between each element in `collection` and the - * source object, returning the first element that has equivalent property - * values. - * - * **Note:** This method supports comparing arrays, booleans, `Date` objects, - * numbers, `Object` objects, regexes, and strings. Objects are compared by - * their own, not inherited, enumerable properties. For comparing a single - * own or inherited property value see `_.matchesProperty`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to search. - * @param {Object} source The object of property values to match. - * @returns {*} Returns the matched element, else `undefined`. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': true }, - * { 'user': 'fred', 'age': 40, 'active': false } - * ]; - * - * _.result(_.findWhere(users, { 'age': 36, 'active': true }), 'user'); - * // => 'barney' - * - * _.result(_.findWhere(users, { 'age': 40, 'active': false }), 'user'); - * // => 'fred' - */ - function findWhere(collection, source) { - return find(collection, baseMatches(source)); - } - - /** - * Iterates over elements of `collection` invoking `iteratee` for each element. - * The `iteratee` is bound to `thisArg` and invoked with three arguments: - * (value, index|key, collection). Iteratee functions may exit iteration early - * by explicitly returning `false`. - * - * **Note:** As with other "Collections" methods, objects with a "length" property - * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn` - * may be used for object iteration. - * - * @static - * @memberOf _ - * @alias each - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Array|Object|string} Returns `collection`. - * @example - * - * _([1, 2]).forEach(function(n) { - * console.log(n); - * }).value(); - * // => logs each value from left to right and returns the array - * - * _.forEach({ 'a': 1, 'b': 2 }, function(n, key) { - * console.log(n, key); - * }); - * // => logs each value-key pair and returns the object (iteration order is not guaranteed) - */ - var forEach = createForEach(arrayEach, baseEach); - - /** - * This method is like `_.forEach` except that it iterates over elements of - * `collection` from right to left. - * - * @static - * @memberOf _ - * @alias eachRight - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Array|Object|string} Returns `collection`. - * @example - * - * _([1, 2]).forEachRight(function(n) { - * console.log(n); - * }).value(); - * // => logs each value from right to left and returns the array - */ - var forEachRight = createForEach(arrayEachRight, baseEachRight); - - /** - * Creates an object composed of keys generated from the results of running - * each element of `collection` through `iteratee`. The corresponding value - * of each key is an array of the elements responsible for generating the key. - * The `iteratee` is bound to `thisArg` and invoked with three arguments: - * (value, index|key, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * _.groupBy([4.2, 6.1, 6.4], function(n) { - * return Math.floor(n); - * }); - * // => { '4': [4.2], '6': [6.1, 6.4] } - * - * _.groupBy([4.2, 6.1, 6.4], function(n) { - * return this.floor(n); - * }, Math); - * // => { '4': [4.2], '6': [6.1, 6.4] } - * - * // using the `_.property` callback shorthand - * _.groupBy(['one', 'two', 'three'], 'length'); - * // => { '3': ['one', 'two'], '5': ['three'] } - */ - var groupBy = createAggregator(function(result, value, key) { - if (hasOwnProperty.call(result, key)) { - result[key].push(value); - } else { - result[key] = [value]; - } - }); - - /** - * Checks if `value` is in `collection` using `SameValueZero` for equality - * comparisons. If `fromIndex` is negative, it is used as the offset from - * the end of `collection`. - * - * **Note:** [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) - * comparisons are like strict equality comparisons, e.g. `===`, except that - * `NaN` matches `NaN`. - * - * @static - * @memberOf _ - * @alias contains, include - * @category Collection - * @param {Array|Object|string} collection The collection to search. - * @param {*} target The value to search for. - * @param {number} [fromIndex=0] The index to search from. - * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`. - * @returns {boolean} Returns `true` if a matching element is found, else `false`. - * @example - * - * _.includes([1, 2, 3], 1); - * // => true - * - * _.includes([1, 2, 3], 1, 2); - * // => false - * - * _.includes({ 'user': 'fred', 'age': 40 }, 'fred'); - * // => true - * - * _.includes('pebbles', 'eb'); - * // => true - */ - function includes(collection, target, fromIndex, guard) { - var length = collection ? getLength(collection) : 0; - if (!isLength(length)) { - collection = values(collection); - length = collection.length; - } - if (!length) { - return false; - } - if (typeof fromIndex != 'number' || (guard && isIterateeCall(target, fromIndex, guard))) { - fromIndex = 0; - } else { - fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0); - } - return (typeof collection == 'string' || !isArray(collection) && isString(collection)) - ? (fromIndex < length && collection.indexOf(target, fromIndex) > -1) - : (getIndexOf(collection, target, fromIndex) > -1); - } - - /** - * Creates an object composed of keys generated from the results of running - * each element of `collection` through `iteratee`. The corresponding value - * of each key is the last element responsible for generating the key. The - * iteratee function is bound to `thisArg` and invoked with three arguments: - * (value, index|key, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * var keyData = [ - * { 'dir': 'left', 'code': 97 }, - * { 'dir': 'right', 'code': 100 } - * ]; - * - * _.indexBy(keyData, 'dir'); - * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } } - * - * _.indexBy(keyData, function(object) { - * return String.fromCharCode(object.code); - * }); - * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } - * - * _.indexBy(keyData, function(object) { - * return this.fromCharCode(object.code); - * }, String); - * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } - */ - var indexBy = createAggregator(function(result, value, key) { - result[key] = value; - }); - - /** - * Invokes the method at `path` on each element in `collection`, returning - * an array of the results of each invoked method. Any additional arguments - * are provided to each invoked method. If `methodName` is a function it is - * invoked for, and `this` bound to, each element in `collection`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Array|Function|string} path The path of the method to invoke or - * the function invoked per iteration. - * @param {...*} [args] The arguments to invoke the method with. - * @returns {Array} Returns the array of results. - * @example - * - * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort'); - * // => [[1, 5, 7], [1, 2, 3]] - * - * _.invoke([123, 456], String.prototype.split, ''); - * // => [['1', '2', '3'], ['4', '5', '6']] - */ - var invoke = restParam(function(collection, path, args) { - var index = -1, - isFunc = typeof path == 'function', - isProp = isKey(path), - length = getLength(collection), - result = isLength(length) ? Array(length) : []; - - baseEach(collection, function(value) { - var func = isFunc ? path : (isProp && value != null && value[path]); - result[++index] = func ? func.apply(value, args) : invokePath(value, path, args); - }); - return result; - }); - - /** - * Creates an array of values by running each element in `collection` through - * `iteratee`. The `iteratee` is bound to `thisArg` and invoked with three - * arguments: (value, index|key, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * Many lodash methods are guarded to work as interatees for methods like - * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`. - * - * The guarded methods are: - * `ary`, `callback`, `chunk`, `clone`, `create`, `curry`, `curryRight`, `drop`, - * `dropRight`, `every`, `fill`, `flatten`, `invert`, `max`, `min`, `parseInt`, - * `slice`, `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimLeft`, - * `trimRight`, `trunc`, `random`, `range`, `sample`, `some`, `uniq`, and `words` - * - * @static - * @memberOf _ - * @alias collect - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Array} Returns the new mapped array. - * @example - * - * function timesThree(n) { - * return n * 3; - * } - * - * _.map([1, 2], timesThree); - * // => [3, 6] - * - * _.map({ 'a': 1, 'b': 2 }, timesThree); - * // => [3, 6] (iteration order is not guaranteed) - * - * var users = [ - * { 'user': 'barney' }, - * { 'user': 'fred' } - * ]; - * - * // using the `_.property` callback shorthand - * _.map(users, 'user'); - * // => ['barney', 'fred'] - */ - function map(collection, iteratee, thisArg) { - var func = isArray(collection) ? arrayMap : baseMap; - iteratee = getCallback(iteratee, thisArg, 3); - return func(collection, iteratee); - } - - /** - * Creates an array of elements split into two groups, the first of which - * contains elements `predicate` returns truthy for, while the second of which - * contains elements `predicate` returns falsey for. The predicate is bound - * to `thisArg` and invoked with three arguments: (value, index|key, collection). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the array of grouped elements. - * @example - * - * _.partition([1, 2, 3], function(n) { - * return n % 2; - * }); - * // => [[1, 3], [2]] - * - * _.partition([1.2, 2.3, 3.4], function(n) { - * return this.floor(n) % 2; - * }, Math); - * // => [[1.2, 3.4], [2.3]] - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': false }, - * { 'user': 'fred', 'age': 40, 'active': true }, - * { 'user': 'pebbles', 'age': 1, 'active': false } - * ]; - * - * var mapper = function(array) { - * return _.pluck(array, 'user'); - * }; - * - * // using the `_.matches` callback shorthand - * _.map(_.partition(users, { 'age': 1, 'active': false }), mapper); - * // => [['pebbles'], ['barney', 'fred']] - * - * // using the `_.matchesProperty` callback shorthand - * _.map(_.partition(users, 'active', false), mapper); - * // => [['barney', 'pebbles'], ['fred']] - * - * // using the `_.property` callback shorthand - * _.map(_.partition(users, 'active'), mapper); - * // => [['fred'], ['barney', 'pebbles']] - */ - var partition = createAggregator(function(result, value, key) { - result[key ? 0 : 1].push(value); - }, function() { return [[], []]; }); - - /** - * Gets the property value of `path` from all elements in `collection`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Array|string} path The path of the property to pluck. - * @returns {Array} Returns the property values. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 40 } - * ]; - * - * _.pluck(users, 'user'); - * // => ['barney', 'fred'] - * - * var userIndex = _.indexBy(users, 'user'); - * _.pluck(userIndex, 'age'); - * // => [36, 40] (iteration order is not guaranteed) - */ - function pluck(collection, path) { - return map(collection, property(path)); - } - - /** - * Reduces `collection` to a value which is the accumulated result of running - * each element in `collection` through `iteratee`, where each successive - * invocation is supplied the return value of the previous. If `accumulator` - * is not provided the first element of `collection` is used as the initial - * value. The `iteratee` is bound to `thisArg` and invoked with four arguments: - * (accumulator, value, index|key, collection). - * - * Many lodash methods are guarded to work as interatees for methods like - * `_.reduce`, `_.reduceRight`, and `_.transform`. - * - * The guarded methods are: - * `assign`, `defaults`, `includes`, `merge`, `sortByAll`, and `sortByOrder` - * - * @static - * @memberOf _ - * @alias foldl, inject - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [accumulator] The initial value. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {*} Returns the accumulated value. - * @example - * - * _.reduce([1, 2], function(total, n) { - * return total + n; - * }); - * // => 3 - * - * _.reduce({ 'a': 1, 'b': 2 }, function(result, n, key) { - * result[key] = n * 3; - * return result; - * }, {}); - * // => { 'a': 3, 'b': 6 } (iteration order is not guaranteed) - */ - var reduce = createReduce(arrayReduce, baseEach); - - /** - * This method is like `_.reduce` except that it iterates over elements of - * `collection` from right to left. - * - * @static - * @memberOf _ - * @alias foldr - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [accumulator] The initial value. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {*} Returns the accumulated value. - * @example - * - * var array = [[0, 1], [2, 3], [4, 5]]; - * - * _.reduceRight(array, function(flattened, other) { - * return flattened.concat(other); - * }, []); - * // => [4, 5, 2, 3, 0, 1] - */ - var reduceRight = createReduce(arrayReduceRight, baseEachRight); - - /** - * The opposite of `_.filter`; this method returns the elements of `collection` - * that `predicate` does **not** return truthy for. - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Array} Returns the new filtered array. - * @example - * - * _.reject([1, 2, 3, 4], function(n) { - * return n % 2 == 0; - * }); - * // => [1, 3] - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': false }, - * { 'user': 'fred', 'age': 40, 'active': true } - * ]; - * - * // using the `_.matches` callback shorthand - * _.pluck(_.reject(users, { 'age': 40, 'active': true }), 'user'); - * // => ['barney'] - * - * // using the `_.matchesProperty` callback shorthand - * _.pluck(_.reject(users, 'active', false), 'user'); - * // => ['fred'] - * - * // using the `_.property` callback shorthand - * _.pluck(_.reject(users, 'active'), 'user'); - * // => ['barney'] - */ - function reject(collection, predicate, thisArg) { - var func = isArray(collection) ? arrayFilter : baseFilter; - predicate = getCallback(predicate, thisArg, 3); - return func(collection, function(value, index, collection) { - return !predicate(value, index, collection); - }); - } - - /** - * Gets a random element or `n` random elements from a collection. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to sample. - * @param {number} [n] The number of elements to sample. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {*} Returns the random sample(s). - * @example - * - * _.sample([1, 2, 3, 4]); - * // => 2 - * - * _.sample([1, 2, 3, 4], 2); - * // => [3, 1] - */ - function sample(collection, n, guard) { - if (guard ? isIterateeCall(collection, n, guard) : n == null) { - collection = toIterable(collection); - var length = collection.length; - return length > 0 ? collection[baseRandom(0, length - 1)] : undefined; - } - var result = shuffle(collection); - result.length = nativeMin(n < 0 ? 0 : (+n || 0), result.length); - return result; - } - - /** - * Creates an array of shuffled values, using a version of the - * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle). - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to shuffle. - * @returns {Array} Returns the new shuffled array. - * @example - * - * _.shuffle([1, 2, 3, 4]); - * // => [4, 1, 3, 2] - */ - function shuffle(collection) { - collection = toIterable(collection); - - var index = -1, - length = collection.length, - result = Array(length); - - while (++index < length) { - var rand = baseRandom(0, index); - if (index != rand) { - result[index] = result[rand]; - } - result[rand] = collection[index]; - } - return result; - } - - /** - * Gets the size of `collection` by returning its length for array-like - * values or the number of own enumerable properties for objects. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to inspect. - * @returns {number} Returns the size of `collection`. - * @example - * - * _.size([1, 2, 3]); - * // => 3 - * - * _.size({ 'a': 1, 'b': 2 }); - * // => 2 - * - * _.size('pebbles'); - * // => 7 - */ - function size(collection) { - var length = collection ? getLength(collection) : 0; - return isLength(length) ? length : keys(collection).length; - } - - /** - * Checks if `predicate` returns truthy for **any** element of `collection`. - * The function returns as soon as it finds a passing value and does not iterate - * over the entire collection. The predicate is bound to `thisArg` and invoked - * with three arguments: (value, index|key, collection). - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @alias any - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {boolean} Returns `true` if any element passes the predicate check, - * else `false`. - * @example - * - * _.some([null, 0, 'yes', false], Boolean); - * // => true - * - * var users = [ - * { 'user': 'barney', 'active': true }, - * { 'user': 'fred', 'active': false } - * ]; - * - * // using the `_.matches` callback shorthand - * _.some(users, { 'user': 'barney', 'active': false }); - * // => false - * - * // using the `_.matchesProperty` callback shorthand - * _.some(users, 'active', false); - * // => true - * - * // using the `_.property` callback shorthand - * _.some(users, 'active'); - * // => true - */ - function some(collection, predicate, thisArg) { - var func = isArray(collection) ? arraySome : baseSome; - if (thisArg && isIterateeCall(collection, predicate, thisArg)) { - predicate = null; - } - if (typeof predicate != 'function' || thisArg !== undefined) { - predicate = getCallback(predicate, thisArg, 3); - } - return func(collection, predicate); - } - - /** - * Creates an array of elements, sorted in ascending order by the results of - * running each element in a collection through `iteratee`. This method performs - * a stable sort, that is, it preserves the original sort order of equal elements. - * The `iteratee` is bound to `thisArg` and invoked with three arguments: - * (value, index|key, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Array} Returns the new sorted array. - * @example - * - * _.sortBy([1, 2, 3], function(n) { - * return Math.sin(n); - * }); - * // => [3, 1, 2] - * - * _.sortBy([1, 2, 3], function(n) { - * return this.sin(n); - * }, Math); - * // => [3, 1, 2] - * - * var users = [ - * { 'user': 'fred' }, - * { 'user': 'pebbles' }, - * { 'user': 'barney' } - * ]; - * - * // using the `_.property` callback shorthand - * _.pluck(_.sortBy(users, 'user'), 'user'); - * // => ['barney', 'fred', 'pebbles'] - */ - function sortBy(collection, iteratee, thisArg) { - if (collection == null) { - return []; - } - if (thisArg && isIterateeCall(collection, iteratee, thisArg)) { - iteratee = null; - } - var index = -1; - iteratee = getCallback(iteratee, thisArg, 3); - - var result = baseMap(collection, function(value, key, collection) { - return { 'criteria': iteratee(value, key, collection), 'index': ++index, 'value': value }; - }); - return baseSortBy(result, compareAscending); - } - - /** - * This method is like `_.sortBy` except that it can sort by multiple iteratees - * or property names. - * - * If a property name is provided for an iteratee the created `_.property` - * style callback returns the property value of the given element. - * - * If an object is provided for an iteratee the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {...(Function|Function[]|Object|Object[]|string|string[])} iteratees - * The iteratees to sort by, specified as individual values or arrays of values. - * @returns {Array} Returns the new sorted array. - * @example - * - * var users = [ - * { 'user': 'fred', 'age': 48 }, - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 42 }, - * { 'user': 'barney', 'age': 34 } - * ]; - * - * _.map(_.sortByAll(users, ['user', 'age']), _.values); - * // => [['barney', 34], ['barney', 36], ['fred', 42], ['fred', 48]] - * - * _.map(_.sortByAll(users, 'user', function(chr) { - * return Math.floor(chr.age / 10); - * }), _.values); - * // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]] - */ - var sortByAll = restParam(function(collection, iteratees) { - if (collection == null) { - return []; - } - var guard = iteratees[2]; - if (guard && isIterateeCall(iteratees[0], iteratees[1], guard)) { - iteratees.length = 1; - } - return baseSortByOrder(collection, baseFlatten(iteratees), []); - }); - - /** - * This method is like `_.sortByAll` except that it allows specifying the - * sort orders of the iteratees to sort by. A truthy value in `orders` will - * sort the corresponding property name in ascending order while a falsey - * value will sort it in descending order. - * - * If a property name is provided for an iteratee the created `_.property` - * style callback returns the property value of the given element. - * - * If an object is provided for an iteratee the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by. - * @param {boolean[]} orders The sort orders of `iteratees`. - * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`. - * @returns {Array} Returns the new sorted array. - * @example - * - * var users = [ - * { 'user': 'fred', 'age': 48 }, - * { 'user': 'barney', 'age': 34 }, - * { 'user': 'fred', 'age': 42 }, - * { 'user': 'barney', 'age': 36 } - * ]; - * - * // sort by `user` in ascending order and by `age` in descending order - * _.map(_.sortByOrder(users, ['user', 'age'], [true, false]), _.values); - * // => [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]] - */ - function sortByOrder(collection, iteratees, orders, guard) { - if (collection == null) { - return []; - } - if (guard && isIterateeCall(iteratees, orders, guard)) { - orders = null; - } - if (!isArray(iteratees)) { - iteratees = iteratees == null ? [] : [iteratees]; - } - if (!isArray(orders)) { - orders = orders == null ? [] : [orders]; - } - return baseSortByOrder(collection, iteratees, orders); - } - - /** - * Performs a deep comparison between each element in `collection` and the - * source object, returning an array of all elements that have equivalent - * property values. - * - * **Note:** This method supports comparing arrays, booleans, `Date` objects, - * numbers, `Object` objects, regexes, and strings. Objects are compared by - * their own, not inherited, enumerable properties. For comparing a single - * own or inherited property value see `_.matchesProperty`. - * - * @static - * @memberOf _ - * @category Collection - * @param {Array|Object|string} collection The collection to search. - * @param {Object} source The object of property values to match. - * @returns {Array} Returns the new filtered array. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': false, 'pets': ['hoppy'] }, - * { 'user': 'fred', 'age': 40, 'active': true, 'pets': ['baby puss', 'dino'] } - * ]; - * - * _.pluck(_.where(users, { 'age': 36, 'active': false }), 'user'); - * // => ['barney'] - * - * _.pluck(_.where(users, { 'pets': ['dino'] }), 'user'); - * // => ['fred'] - */ - function where(collection, source) { - return filter(collection, baseMatches(source)); - } - - /*------------------------------------------------------------------------*/ - - /** - * Gets the number of milliseconds that have elapsed since the Unix epoch - * (1 January 1970 00:00:00 UTC). - * - * @static - * @memberOf _ - * @category Date - * @example - * - * _.defer(function(stamp) { - * console.log(_.now() - stamp); - * }, _.now()); - * // => logs the number of milliseconds it took for the deferred function to be invoked - */ - var now = nativeNow || function() { - return new Date().getTime(); - }; - - /*------------------------------------------------------------------------*/ - - /** - * The opposite of `_.before`; this method creates a function that invokes - * `func` once it is called `n` or more times. - * - * @static - * @memberOf _ - * @category Function - * @param {number} n The number of calls before `func` is invoked. - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var saves = ['profile', 'settings']; - * - * var done = _.after(saves.length, function() { - * console.log('done saving!'); - * }); - * - * _.forEach(saves, function(type) { - * asyncSave({ 'type': type, 'complete': done }); - * }); - * // => logs 'done saving!' after the two async saves have completed - */ - function after(n, func) { - if (typeof func != 'function') { - if (typeof n == 'function') { - var temp = n; - n = func; - func = temp; - } else { - throw new TypeError(FUNC_ERROR_TEXT); - } - } - n = nativeIsFinite(n = +n) ? n : 0; - return function() { - if (--n < 1) { - return func.apply(this, arguments); - } - }; - } - - /** - * Creates a function that accepts up to `n` arguments ignoring any - * additional arguments. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to cap arguments for. - * @param {number} [n=func.length] The arity cap. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Function} Returns the new function. - * @example - * - * _.map(['6', '8', '10'], _.ary(parseInt, 1)); - * // => [6, 8, 10] - */ - function ary(func, n, guard) { - if (guard && isIterateeCall(func, n, guard)) { - n = null; - } - n = (func && n == null) ? func.length : nativeMax(+n || 0, 0); - return createWrapper(func, ARY_FLAG, null, null, null, null, n); - } - - /** - * Creates a function that invokes `func`, with the `this` binding and arguments - * of the created function, while it is called less than `n` times. Subsequent - * calls to the created function return the result of the last `func` invocation. - * - * @static - * @memberOf _ - * @category Function - * @param {number} n The number of calls at which `func` is no longer invoked. - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * jQuery('#add').on('click', _.before(5, addContactToList)); - * // => allows adding up to 4 contacts to the list - */ - function before(n, func) { - var result; - if (typeof func != 'function') { - if (typeof n == 'function') { - var temp = n; - n = func; - func = temp; - } else { - throw new TypeError(FUNC_ERROR_TEXT); - } - } - return function() { - if (--n > 0) { - result = func.apply(this, arguments); - } - if (n <= 1) { - func = null; - } - return result; - }; - } - - /** - * Creates a function that invokes `func` with the `this` binding of `thisArg` - * and prepends any additional `_.bind` arguments to those provided to the - * bound function. - * - * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds, - * may be used as a placeholder for partially applied arguments. - * - * **Note:** Unlike native `Function#bind` this method does not set the "length" - * property of bound functions. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to bind. - * @param {*} thisArg The `this` binding of `func`. - * @param {...*} [partials] The arguments to be partially applied. - * @returns {Function} Returns the new bound function. - * @example - * - * var greet = function(greeting, punctuation) { - * return greeting + ' ' + this.user + punctuation; - * }; - * - * var object = { 'user': 'fred' }; - * - * var bound = _.bind(greet, object, 'hi'); - * bound('!'); - * // => 'hi fred!' - * - * // using placeholders - * var bound = _.bind(greet, object, _, '!'); - * bound('hi'); - * // => 'hi fred!' - */ - var bind = restParam(function(func, thisArg, partials) { - var bitmask = BIND_FLAG; - if (partials.length) { - var holders = replaceHolders(partials, bind.placeholder); - bitmask |= PARTIAL_FLAG; - } - return createWrapper(func, bitmask, thisArg, partials, holders); - }); - - /** - * Binds methods of an object to the object itself, overwriting the existing - * method. Method names may be specified as individual arguments or as arrays - * of method names. If no method names are provided all enumerable function - * properties, own and inherited, of `object` are bound. - * - * **Note:** This method does not set the "length" property of bound functions. - * - * @static - * @memberOf _ - * @category Function - * @param {Object} object The object to bind and assign the bound methods to. - * @param {...(string|string[])} [methodNames] The object method names to bind, - * specified as individual method names or arrays of method names. - * @returns {Object} Returns `object`. - * @example - * - * var view = { - * 'label': 'docs', - * 'onClick': function() { - * console.log('clicked ' + this.label); - * } - * }; - * - * _.bindAll(view); - * jQuery('#docs').on('click', view.onClick); - * // => logs 'clicked docs' when the element is clicked - */ - var bindAll = restParam(function(object, methodNames) { - methodNames = methodNames.length ? baseFlatten(methodNames) : functions(object); - - var index = -1, - length = methodNames.length; - - while (++index < length) { - var key = methodNames[index]; - object[key] = createWrapper(object[key], BIND_FLAG, object); - } - return object; - }); - - /** - * Creates a function that invokes the method at `object[key]` and prepends - * any additional `_.bindKey` arguments to those provided to the bound function. - * - * This method differs from `_.bind` by allowing bound functions to reference - * methods that may be redefined or don't yet exist. - * See [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern) - * for more details. - * - * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic - * builds, may be used as a placeholder for partially applied arguments. - * - * @static - * @memberOf _ - * @category Function - * @param {Object} object The object the method belongs to. - * @param {string} key The key of the method. - * @param {...*} [partials] The arguments to be partially applied. - * @returns {Function} Returns the new bound function. - * @example - * - * var object = { - * 'user': 'fred', - * 'greet': function(greeting, punctuation) { - * return greeting + ' ' + this.user + punctuation; - * } - * }; - * - * var bound = _.bindKey(object, 'greet', 'hi'); - * bound('!'); - * // => 'hi fred!' - * - * object.greet = function(greeting, punctuation) { - * return greeting + 'ya ' + this.user + punctuation; - * }; - * - * bound('!'); - * // => 'hiya fred!' - * - * // using placeholders - * var bound = _.bindKey(object, 'greet', _, '!'); - * bound('hi'); - * // => 'hiya fred!' - */ - var bindKey = restParam(function(object, key, partials) { - var bitmask = BIND_FLAG | BIND_KEY_FLAG; - if (partials.length) { - var holders = replaceHolders(partials, bindKey.placeholder); - bitmask |= PARTIAL_FLAG; - } - return createWrapper(key, bitmask, object, partials, holders); - }); - - /** - * Creates a function that accepts one or more arguments of `func` that when - * called either invokes `func` returning its result, if all `func` arguments - * have been provided, or returns a function that accepts one or more of the - * remaining `func` arguments, and so on. The arity of `func` may be specified - * if `func.length` is not sufficient. - * - * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds, - * may be used as a placeholder for provided arguments. - * - * **Note:** This method does not set the "length" property of curried functions. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to curry. - * @param {number} [arity=func.length] The arity of `func`. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Function} Returns the new curried function. - * @example - * - * var abc = function(a, b, c) { - * return [a, b, c]; - * }; - * - * var curried = _.curry(abc); - * - * curried(1)(2)(3); - * // => [1, 2, 3] - * - * curried(1, 2)(3); - * // => [1, 2, 3] - * - * curried(1, 2, 3); - * // => [1, 2, 3] - * - * // using placeholders - * curried(1)(_, 3)(2); - * // => [1, 2, 3] - */ - var curry = createCurry(CURRY_FLAG); - - /** - * This method is like `_.curry` except that arguments are applied to `func` - * in the manner of `_.partialRight` instead of `_.partial`. - * - * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic - * builds, may be used as a placeholder for provided arguments. - * - * **Note:** This method does not set the "length" property of curried functions. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to curry. - * @param {number} [arity=func.length] The arity of `func`. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Function} Returns the new curried function. - * @example - * - * var abc = function(a, b, c) { - * return [a, b, c]; - * }; - * - * var curried = _.curryRight(abc); - * - * curried(3)(2)(1); - * // => [1, 2, 3] - * - * curried(2, 3)(1); - * // => [1, 2, 3] - * - * curried(1, 2, 3); - * // => [1, 2, 3] - * - * // using placeholders - * curried(3)(1, _)(2); - * // => [1, 2, 3] - */ - var curryRight = createCurry(CURRY_RIGHT_FLAG); - - /** - * Creates a function that delays invoking `func` until after `wait` milliseconds - * have elapsed since the last time it was invoked. The created function comes - * with a `cancel` method to cancel delayed invocations. Provide an options - * object to indicate that `func` should be invoked on the leading and/or - * trailing edge of the `wait` timeout. Subsequent calls to the debounced - * function return the result of the last `func` invocation. - * - * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked - * on the trailing edge of the timeout only if the the debounced function is - * invoked more than once during the `wait` timeout. - * - * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation) - * for details over the differences between `_.debounce` and `_.throttle`. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to debounce. - * @param {number} [wait=0] The number of milliseconds to delay. - * @param {Object} [options] The options object. - * @param {boolean} [options.leading=false] Specify invoking on the leading - * edge of the timeout. - * @param {number} [options.maxWait] The maximum time `func` is allowed to be - * delayed before it is invoked. - * @param {boolean} [options.trailing=true] Specify invoking on the trailing - * edge of the timeout. - * @returns {Function} Returns the new debounced function. - * @example - * - * // avoid costly calculations while the window size is in flux - * jQuery(window).on('resize', _.debounce(calculateLayout, 150)); - * - * // invoke `sendMail` when the click event is fired, debouncing subsequent calls - * jQuery('#postbox').on('click', _.debounce(sendMail, 300, { - * 'leading': true, - * 'trailing': false - * })); - * - * // ensure `batchLog` is invoked once after 1 second of debounced calls - * var source = new EventSource('/stream'); - * jQuery(source).on('message', _.debounce(batchLog, 250, { - * 'maxWait': 1000 - * })); - * - * // cancel a debounced call - * var todoChanges = _.debounce(batchLog, 1000); - * Object.observe(models.todo, todoChanges); - * - * Object.observe(models, function(changes) { - * if (_.find(changes, { 'user': 'todo', 'type': 'delete'})) { - * todoChanges.cancel(); - * } - * }, ['delete']); - * - * // ...at some point `models.todo` is changed - * models.todo.completed = true; - * - * // ...before 1 second has passed `models.todo` is deleted - * // which cancels the debounced `todoChanges` call - * delete models.todo; - */ - function debounce(func, wait, options) { - var args, - maxTimeoutId, - result, - stamp, - thisArg, - timeoutId, - trailingCall, - lastCalled = 0, - maxWait = false, - trailing = true; - - if (typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - wait = wait < 0 ? 0 : (+wait || 0); - if (options === true) { - var leading = true; - trailing = false; - } else if (isObject(options)) { - leading = options.leading; - maxWait = 'maxWait' in options && nativeMax(+options.maxWait || 0, wait); - trailing = 'trailing' in options ? options.trailing : trailing; - } - - function cancel() { - if (timeoutId) { - clearTimeout(timeoutId); - } - if (maxTimeoutId) { - clearTimeout(maxTimeoutId); - } - maxTimeoutId = timeoutId = trailingCall = undefined; - } - - function delayed() { - var remaining = wait - (now() - stamp); - if (remaining <= 0 || remaining > wait) { - if (maxTimeoutId) { - clearTimeout(maxTimeoutId); - } - var isCalled = trailingCall; - maxTimeoutId = timeoutId = trailingCall = undefined; - if (isCalled) { - lastCalled = now(); - result = func.apply(thisArg, args); - if (!timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - } - } else { - timeoutId = setTimeout(delayed, remaining); - } - } - - function maxDelayed() { - if (timeoutId) { - clearTimeout(timeoutId); - } - maxTimeoutId = timeoutId = trailingCall = undefined; - if (trailing || (maxWait !== wait)) { - lastCalled = now(); - result = func.apply(thisArg, args); - if (!timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - } - } - - function debounced() { - args = arguments; - stamp = now(); - thisArg = this; - trailingCall = trailing && (timeoutId || !leading); - - if (maxWait === false) { - var leadingCall = leading && !timeoutId; - } else { - if (!maxTimeoutId && !leading) { - lastCalled = stamp; - } - var remaining = maxWait - (stamp - lastCalled), - isCalled = remaining <= 0 || remaining > maxWait; - - if (isCalled) { - if (maxTimeoutId) { - maxTimeoutId = clearTimeout(maxTimeoutId); - } - lastCalled = stamp; - result = func.apply(thisArg, args); - } - else if (!maxTimeoutId) { - maxTimeoutId = setTimeout(maxDelayed, remaining); - } - } - if (isCalled && timeoutId) { - timeoutId = clearTimeout(timeoutId); - } - else if (!timeoutId && wait !== maxWait) { - timeoutId = setTimeout(delayed, wait); - } - if (leadingCall) { - isCalled = true; - result = func.apply(thisArg, args); - } - if (isCalled && !timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - return result; - } - debounced.cancel = cancel; - return debounced; - } - - /** - * Defers invoking the `func` until the current call stack has cleared. Any - * additional arguments are provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to defer. - * @param {...*} [args] The arguments to invoke the function with. - * @returns {number} Returns the timer id. - * @example - * - * _.defer(function(text) { - * console.log(text); - * }, 'deferred'); - * // logs 'deferred' after one or more milliseconds - */ - var defer = restParam(function(func, args) { - return baseDelay(func, 1, args); - }); - - /** - * Invokes `func` after `wait` milliseconds. Any additional arguments are - * provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to delay. - * @param {number} wait The number of milliseconds to delay invocation. - * @param {...*} [args] The arguments to invoke the function with. - * @returns {number} Returns the timer id. - * @example - * - * _.delay(function(text) { - * console.log(text); - * }, 1000, 'later'); - * // => logs 'later' after one second - */ - var delay = restParam(function(func, wait, args) { - return baseDelay(func, wait, args); - }); - - /** - * Creates a function that returns the result of invoking the provided - * functions with the `this` binding of the created function, where each - * successive invocation is supplied the return value of the previous. - * - * @static - * @memberOf _ - * @category Function - * @param {...Function} [funcs] Functions to invoke. - * @returns {Function} Returns the new function. - * @example - * - * function square(n) { - * return n * n; - * } - * - * var addSquare = _.flow(_.add, square); - * addSquare(1, 2); - * // => 9 - */ - var flow = createFlow(); - - /** - * This method is like `_.flow` except that it creates a function that - * invokes the provided functions from right to left. - * - * @static - * @memberOf _ - * @alias backflow, compose - * @category Function - * @param {...Function} [funcs] Functions to invoke. - * @returns {Function} Returns the new function. - * @example - * - * function square(n) { - * return n * n; - * } - * - * var addSquare = _.flowRight(square, _.add); - * addSquare(1, 2); - * // => 9 - */ - var flowRight = createFlow(true); - - /** - * Creates a function that memoizes the result of `func`. If `resolver` is - * provided it determines the cache key for storing the result based on the - * arguments provided to the memoized function. By default, the first argument - * provided to the memoized function is coerced to a string and used as the - * cache key. The `func` is invoked with the `this` binding of the memoized - * function. - * - * **Note:** The cache is exposed as the `cache` property on the memoized - * function. Its creation may be customized by replacing the `_.memoize.Cache` - * constructor with one whose instances implement the [`Map`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-properties-of-the-map-prototype-object) - * method interface of `get`, `has`, and `set`. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to have its output memoized. - * @param {Function} [resolver] The function to resolve the cache key. - * @returns {Function} Returns the new memoizing function. - * @example - * - * var upperCase = _.memoize(function(string) { - * return string.toUpperCase(); - * }); - * - * upperCase('fred'); - * // => 'FRED' - * - * // modifying the result cache - * upperCase.cache.set('fred', 'BARNEY'); - * upperCase('fred'); - * // => 'BARNEY' - * - * // replacing `_.memoize.Cache` - * var object = { 'user': 'fred' }; - * var other = { 'user': 'barney' }; - * var identity = _.memoize(_.identity); - * - * identity(object); - * // => { 'user': 'fred' } - * identity(other); - * // => { 'user': 'fred' } - * - * _.memoize.Cache = WeakMap; - * var identity = _.memoize(_.identity); - * - * identity(object); - * // => { 'user': 'fred' } - * identity(other); - * // => { 'user': 'barney' } - */ - function memoize(func, resolver) { - if (typeof func != 'function' || (resolver && typeof resolver != 'function')) { - throw new TypeError(FUNC_ERROR_TEXT); - } - var memoized = function() { - var args = arguments, - cache = memoized.cache, - key = resolver ? resolver.apply(this, args) : args[0]; - - if (cache.has(key)) { - return cache.get(key); - } - var result = func.apply(this, args); - cache.set(key, result); - return result; - }; - memoized.cache = new memoize.Cache; - return memoized; - } - - /** - * Creates a function that negates the result of the predicate `func`. The - * `func` predicate is invoked with the `this` binding and arguments of the - * created function. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} predicate The predicate to negate. - * @returns {Function} Returns the new function. - * @example - * - * function isEven(n) { - * return n % 2 == 0; - * } - * - * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven)); - * // => [1, 3, 5] - */ - function negate(predicate) { - if (typeof predicate != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - return function() { - return !predicate.apply(this, arguments); - }; - } - - /** - * Creates a function that is restricted to invoking `func` once. Repeat calls - * to the function return the value of the first call. The `func` is invoked - * with the `this` binding and arguments of the created function. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var initialize = _.once(createApplication); - * initialize(); - * initialize(); - * // `initialize` invokes `createApplication` once - */ - function once(func) { - return before(2, func); - } - - /** - * Creates a function that invokes `func` with `partial` arguments prepended - * to those provided to the new function. This method is like `_.bind` except - * it does **not** alter the `this` binding. - * - * The `_.partial.placeholder` value, which defaults to `_` in monolithic - * builds, may be used as a placeholder for partially applied arguments. - * - * **Note:** This method does not set the "length" property of partially - * applied functions. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to partially apply arguments to. - * @param {...*} [partials] The arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. - * @example - * - * var greet = function(greeting, name) { - * return greeting + ' ' + name; - * }; - * - * var sayHelloTo = _.partial(greet, 'hello'); - * sayHelloTo('fred'); - * // => 'hello fred' - * - * // using placeholders - * var greetFred = _.partial(greet, _, 'fred'); - * greetFred('hi'); - * // => 'hi fred' - */ - var partial = createPartial(PARTIAL_FLAG); - - /** - * This method is like `_.partial` except that partially applied arguments - * are appended to those provided to the new function. - * - * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic - * builds, may be used as a placeholder for partially applied arguments. - * - * **Note:** This method does not set the "length" property of partially - * applied functions. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to partially apply arguments to. - * @param {...*} [partials] The arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. - * @example - * - * var greet = function(greeting, name) { - * return greeting + ' ' + name; - * }; - * - * var greetFred = _.partialRight(greet, 'fred'); - * greetFred('hi'); - * // => 'hi fred' - * - * // using placeholders - * var sayHelloTo = _.partialRight(greet, 'hello', _); - * sayHelloTo('fred'); - * // => 'hello fred' - */ - var partialRight = createPartial(PARTIAL_RIGHT_FLAG); - - /** - * Creates a function that invokes `func` with arguments arranged according - * to the specified indexes where the argument value at the first index is - * provided as the first argument, the argument value at the second index is - * provided as the second argument, and so on. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to rearrange arguments for. - * @param {...(number|number[])} indexes The arranged argument indexes, - * specified as individual indexes or arrays of indexes. - * @returns {Function} Returns the new function. - * @example - * - * var rearged = _.rearg(function(a, b, c) { - * return [a, b, c]; - * }, 2, 0, 1); - * - * rearged('b', 'c', 'a') - * // => ['a', 'b', 'c'] - * - * var map = _.rearg(_.map, [1, 0]); - * map(function(n) { - * return n * 3; - * }, [1, 2, 3]); - * // => [3, 6, 9] - */ - var rearg = restParam(function(func, indexes) { - return createWrapper(func, REARG_FLAG, null, null, null, baseFlatten(indexes)); - }); - - /** - * Creates a function that invokes `func` with the `this` binding of the - * created function and arguments from `start` and beyond provided as an array. - * - * **Note:** This method is based on the [rest parameter](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters). - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to apply a rest parameter to. - * @param {number} [start=func.length-1] The start position of the rest parameter. - * @returns {Function} Returns the new function. - * @example - * - * var say = _.restParam(function(what, names) { - * return what + ' ' + _.initial(names).join(', ') + - * (_.size(names) > 1 ? ', & ' : '') + _.last(names); - * }); - * - * say('hello', 'fred', 'barney', 'pebbles'); - * // => 'hello fred, barney, & pebbles' - */ - function restParam(func, start) { - if (typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - start = nativeMax(start === undefined ? (func.length - 1) : (+start || 0), 0); - return function() { - var args = arguments, - index = -1, - length = nativeMax(args.length - start, 0), - rest = Array(length); - - while (++index < length) { - rest[index] = args[start + index]; - } - switch (start) { - case 0: return func.call(this, rest); - case 1: return func.call(this, args[0], rest); - case 2: return func.call(this, args[0], args[1], rest); - } - var otherArgs = Array(start + 1); - index = -1; - while (++index < start) { - otherArgs[index] = args[index]; - } - otherArgs[start] = rest; - return func.apply(this, otherArgs); - }; - } - - /** - * Creates a function that invokes `func` with the `this` binding of the created - * function and an array of arguments much like [`Function#apply`](https://es5.github.io/#x15.3.4.3). - * - * **Note:** This method is based on the [spread operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator). - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to spread arguments over. - * @returns {Function} Returns the new function. - * @example - * - * var say = _.spread(function(who, what) { - * return who + ' says ' + what; - * }); - * - * say(['fred', 'hello']); - * // => 'fred says hello' - * - * // with a Promise - * var numbers = Promise.all([ - * Promise.resolve(40), - * Promise.resolve(36) - * ]); - * - * numbers.then(_.spread(function(x, y) { - * return x + y; - * })); - * // => a Promise of 76 - */ - function spread(func) { - if (typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - return function(array) { - return func.apply(this, array); - }; - } - - /** - * Creates a function that only invokes `func` at most once per every `wait` - * milliseconds. The created function comes with a `cancel` method to cancel - * delayed invocations. Provide an options object to indicate that `func` - * should be invoked on the leading and/or trailing edge of the `wait` timeout. - * Subsequent calls to the throttled function return the result of the last - * `func` call. - * - * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked - * on the trailing edge of the timeout only if the the throttled function is - * invoked more than once during the `wait` timeout. - * - * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation) - * for details over the differences between `_.throttle` and `_.debounce`. - * - * @static - * @memberOf _ - * @category Function - * @param {Function} func The function to throttle. - * @param {number} [wait=0] The number of milliseconds to throttle invocations to. - * @param {Object} [options] The options object. - * @param {boolean} [options.leading=true] Specify invoking on the leading - * edge of the timeout. - * @param {boolean} [options.trailing=true] Specify invoking on the trailing - * edge of the timeout. - * @returns {Function} Returns the new throttled function. - * @example - * - * // avoid excessively updating the position while scrolling - * jQuery(window).on('scroll', _.throttle(updatePosition, 100)); - * - * // invoke `renewToken` when the click event is fired, but not more than once every 5 minutes - * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, { - * 'trailing': false - * })); - * - * // cancel a trailing throttled call - * jQuery(window).on('popstate', throttled.cancel); - */ - function throttle(func, wait, options) { - var leading = true, - trailing = true; - - if (typeof func != 'function') { - throw new TypeError(FUNC_ERROR_TEXT); - } - if (options === false) { - leading = false; - } else if (isObject(options)) { - leading = 'leading' in options ? !!options.leading : leading; - trailing = 'trailing' in options ? !!options.trailing : trailing; - } - debounceOptions.leading = leading; - debounceOptions.maxWait = +wait; - debounceOptions.trailing = trailing; - return debounce(func, wait, debounceOptions); - } - - /** - * Creates a function that provides `value` to the wrapper function as its - * first argument. Any additional arguments provided to the function are - * appended to those provided to the wrapper function. The wrapper is invoked - * with the `this` binding of the created function. - * - * @static - * @memberOf _ - * @category Function - * @param {*} value The value to wrap. - * @param {Function} wrapper The wrapper function. - * @returns {Function} Returns the new function. - * @example - * - * var p = _.wrap(_.escape, function(func, text) { - * return '<p>' + func(text) + '</p>'; - * }); - * - * p('fred, barney, & pebbles'); - * // => '<p>fred, barney, & pebbles</p>' - */ - function wrap(value, wrapper) { - wrapper = wrapper == null ? identity : wrapper; - return createWrapper(wrapper, PARTIAL_FLAG, null, [value], []); - } - - /*------------------------------------------------------------------------*/ - - /** - * Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned, - * otherwise they are assigned by reference. If `customizer` is provided it is - * invoked to produce the cloned values. If `customizer` returns `undefined` - * cloning is handled by the method instead. The `customizer` is bound to - * `thisArg` and invoked with two argument; (value [, index|key, object]). - * - * **Note:** This method is loosely based on the - * [structured clone algorithm](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm). - * The enumerable properties of `arguments` objects and objects created by - * constructors other than `Object` are cloned to plain `Object` objects. An - * empty object is returned for uncloneable values such as functions, DOM nodes, - * Maps, Sets, and WeakMaps. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to clone. - * @param {boolean} [isDeep] Specify a deep clone. - * @param {Function} [customizer] The function to customize cloning values. - * @param {*} [thisArg] The `this` binding of `customizer`. - * @returns {*} Returns the cloned value. - * @example - * - * var users = [ - * { 'user': 'barney' }, - * { 'user': 'fred' } - * ]; - * - * var shallow = _.clone(users); - * shallow[0] === users[0]; - * // => true - * - * var deep = _.clone(users, true); - * deep[0] === users[0]; - * // => false - * - * // using a customizer callback - * var el = _.clone(document.body, function(value) { - * if (_.isElement(value)) { - * return value.cloneNode(false); - * } - * }); - * - * el === document.body - * // => false - * el.nodeName - * // => BODY - * el.childNodes.length; - * // => 0 - */ - function clone(value, isDeep, customizer, thisArg) { - if (isDeep && typeof isDeep != 'boolean' && isIterateeCall(value, isDeep, customizer)) { - isDeep = false; - } - else if (typeof isDeep == 'function') { - thisArg = customizer; - customizer = isDeep; - isDeep = false; - } - customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 1); - return baseClone(value, isDeep, customizer); - } - - /** - * Creates a deep clone of `value`. If `customizer` is provided it is invoked - * to produce the cloned values. If `customizer` returns `undefined` cloning - * is handled by the method instead. The `customizer` is bound to `thisArg` - * and invoked with two argument; (value [, index|key, object]). - * - * **Note:** This method is loosely based on the - * [structured clone algorithm](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm). - * The enumerable properties of `arguments` objects and objects created by - * constructors other than `Object` are cloned to plain `Object` objects. An - * empty object is returned for uncloneable values such as functions, DOM nodes, - * Maps, Sets, and WeakMaps. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to deep clone. - * @param {Function} [customizer] The function to customize cloning values. - * @param {*} [thisArg] The `this` binding of `customizer`. - * @returns {*} Returns the deep cloned value. - * @example - * - * var users = [ - * { 'user': 'barney' }, - * { 'user': 'fred' } - * ]; - * - * var deep = _.cloneDeep(users); - * deep[0] === users[0]; - * // => false - * - * // using a customizer callback - * var el = _.cloneDeep(document.body, function(value) { - * if (_.isElement(value)) { - * return value.cloneNode(true); - * } - * }); - * - * el === document.body - * // => false - * el.nodeName - * // => BODY - * el.childNodes.length; - * // => 20 - */ - function cloneDeep(value, customizer, thisArg) { - customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 1); - return baseClone(value, true, customizer); - } - - /** - * Checks if `value` is classified as an `arguments` object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isArguments(function() { return arguments; }()); - * // => true - * - * _.isArguments([1, 2, 3]); - * // => false - */ - function isArguments(value) { - var length = isObjectLike(value) ? value.length : undefined; - return isLength(length) && objToString.call(value) == argsTag; - } - - /** - * Checks if `value` is classified as an `Array` object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isArray([1, 2, 3]); - * // => true - * - * _.isArray(function() { return arguments; }()); - * // => false - */ - var isArray = nativeIsArray || function(value) { - return isObjectLike(value) && isLength(value.length) && objToString.call(value) == arrayTag; - }; - - /** - * Checks if `value` is classified as a boolean primitive or object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isBoolean(false); - * // => true - * - * _.isBoolean(null); - * // => false - */ - function isBoolean(value) { - return value === true || value === false || (isObjectLike(value) && objToString.call(value) == boolTag); - } - - /** - * Checks if `value` is classified as a `Date` object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isDate(new Date); - * // => true - * - * _.isDate('Mon April 23 2012'); - * // => false - */ - function isDate(value) { - return isObjectLike(value) && objToString.call(value) == dateTag; - } - - /** - * Checks if `value` is a DOM element. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`. - * @example - * - * _.isElement(document.body); - * // => true - * - * _.isElement('<body>'); - * // => false - */ - function isElement(value) { - return !!value && value.nodeType === 1 && isObjectLike(value) && - (objToString.call(value).indexOf('Element') > -1); - } - // Fallback for environments without DOM support. - if (!support.dom) { - isElement = function(value) { - return !!value && value.nodeType === 1 && isObjectLike(value) && !isPlainObject(value); - }; - } - - /** - * Checks if `value` is empty. A value is considered empty unless it is an - * `arguments` object, array, string, or jQuery-like collection with a length - * greater than `0` or an object with own enumerable properties. - * - * @static - * @memberOf _ - * @category Lang - * @param {Array|Object|string} value The value to inspect. - * @returns {boolean} Returns `true` if `value` is empty, else `false`. - * @example - * - * _.isEmpty(null); - * // => true - * - * _.isEmpty(true); - * // => true - * - * _.isEmpty(1); - * // => true - * - * _.isEmpty([1, 2, 3]); - * // => false - * - * _.isEmpty({ 'a': 1 }); - * // => false - */ - function isEmpty(value) { - if (value == null) { - return true; - } - var length = getLength(value); - if (isLength(length) && (isArray(value) || isString(value) || isArguments(value) || - (isObjectLike(value) && isFunction(value.splice)))) { - return !length; - } - return !keys(value).length; - } - - /** - * Performs a deep comparison between two values to determine if they are - * equivalent. If `customizer` is provided it is invoked to compare values. - * If `customizer` returns `undefined` comparisons are handled by the method - * instead. The `customizer` is bound to `thisArg` and invoked with three - * arguments: (value, other [, index|key]). - * - * **Note:** This method supports comparing arrays, booleans, `Date` objects, - * numbers, `Object` objects, regexes, and strings. Objects are compared by - * their own, not inherited, enumerable properties. Functions and DOM nodes - * are **not** supported. Provide a customizer function to extend support - * for comparing other values. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to compare. - * @param {*} other The other value to compare. - * @param {Function} [customizer] The function to customize value comparisons. - * @param {*} [thisArg] The `this` binding of `customizer`. - * @returns {boolean} Returns `true` if the values are equivalent, else `false`. - * @example - * - * var object = { 'user': 'fred' }; - * var other = { 'user': 'fred' }; - * - * object == other; - * // => false - * - * _.isEqual(object, other); - * // => true - * - * // using a customizer callback - * var array = ['hello', 'goodbye']; - * var other = ['hi', 'goodbye']; - * - * _.isEqual(array, other, function(value, other) { - * if (_.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/)) { - * return true; - * } - * }); - * // => true - */ - function isEqual(value, other, customizer, thisArg) { - customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 3); - if (!customizer && isStrictComparable(value) && isStrictComparable(other)) { - return value === other; - } - var result = customizer ? customizer(value, other) : undefined; - return result === undefined ? baseIsEqual(value, other, customizer) : !!result; - } - - /** - * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`, - * `SyntaxError`, `TypeError`, or `URIError` object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is an error object, else `false`. - * @example - * - * _.isError(new Error); - * // => true - * - * _.isError(Error); - * // => false - */ - function isError(value) { - return isObjectLike(value) && typeof value.message == 'string' && objToString.call(value) == errorTag; - } - - /** - * Checks if `value` is a finite primitive number. - * - * **Note:** This method is based on [`Number.isFinite`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite). - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a finite number, else `false`. - * @example - * - * _.isFinite(10); - * // => true - * - * _.isFinite('10'); - * // => false - * - * _.isFinite(true); - * // => false - * - * _.isFinite(Object(10)); - * // => false - * - * _.isFinite(Infinity); - * // => false - */ - var isFinite = nativeNumIsFinite || function(value) { - return typeof value == 'number' && nativeIsFinite(value); - }; - - /** - * Checks if `value` is classified as a `Function` object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isFunction(_); - * // => true - * - * _.isFunction(/abc/); - * // => false - */ - var isFunction = !(baseIsFunction(/x/) || (Uint8Array && !baseIsFunction(Uint8Array))) ? baseIsFunction : function(value) { - // The use of `Object#toString` avoids issues with the `typeof` operator - // in older versions of Chrome and Safari which return 'function' for regexes - // and Safari 8 equivalents which return 'object' for typed array constructors. - return objToString.call(value) == funcTag; - }; - - /** - * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`. - * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is an object, else `false`. - * @example - * - * _.isObject({}); - * // => true - * - * _.isObject([1, 2, 3]); - * // => true - * - * _.isObject(1); - * // => false - */ - function isObject(value) { - // Avoid a V8 JIT bug in Chrome 19-20. - // See https://code.google.com/p/v8/issues/detail?id=2291 for more details. - var type = typeof value; - return type == 'function' || (!!value && type == 'object'); - } - - /** - * Performs a deep comparison between `object` and `source` to determine if - * `object` contains equivalent property values. If `customizer` is provided - * it is invoked to compare values. If `customizer` returns `undefined` - * comparisons are handled by the method instead. The `customizer` is bound - * to `thisArg` and invoked with three arguments: (value, other, index|key). - * - * **Note:** This method supports comparing properties of arrays, booleans, - * `Date` objects, numbers, `Object` objects, regexes, and strings. Functions - * and DOM nodes are **not** supported. Provide a customizer function to extend - * support for comparing other values. - * - * @static - * @memberOf _ - * @category Lang - * @param {Object} object The object to inspect. - * @param {Object} source The object of property values to match. - * @param {Function} [customizer] The function to customize value comparisons. - * @param {*} [thisArg] The `this` binding of `customizer`. - * @returns {boolean} Returns `true` if `object` is a match, else `false`. - * @example - * - * var object = { 'user': 'fred', 'age': 40 }; - * - * _.isMatch(object, { 'age': 40 }); - * // => true - * - * _.isMatch(object, { 'age': 36 }); - * // => false - * - * // using a customizer callback - * var object = { 'greeting': 'hello' }; - * var source = { 'greeting': 'hi' }; - * - * _.isMatch(object, source, function(value, other) { - * return _.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/) || undefined; - * }); - * // => true - */ - function isMatch(object, source, customizer, thisArg) { - var props = keys(source), - length = props.length; - - if (!length) { - return true; - } - if (object == null) { - return false; - } - customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 3); - object = toObject(object); - if (!customizer && length == 1) { - var key = props[0], - value = source[key]; - - if (isStrictComparable(value)) { - return value === object[key] && (value !== undefined || (key in object)); - } - } - var values = Array(length), - strictCompareFlags = Array(length); - - while (length--) { - value = values[length] = source[props[length]]; - strictCompareFlags[length] = isStrictComparable(value); - } - return baseIsMatch(object, props, values, strictCompareFlags, customizer); - } - - /** - * Checks if `value` is `NaN`. - * - * **Note:** This method is not the same as [`isNaN`](https://es5.github.io/#x15.1.2.4) - * which returns `true` for `undefined` and other non-numeric values. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`. - * @example - * - * _.isNaN(NaN); - * // => true - * - * _.isNaN(new Number(NaN)); - * // => true - * - * isNaN(undefined); - * // => true - * - * _.isNaN(undefined); - * // => false - */ - function isNaN(value) { - // An `NaN` primitive is the only value that is not equal to itself. - // Perform the `toStringTag` check first to avoid errors with some host objects in IE. - return isNumber(value) && value != +value; - } - - /** - * Checks if `value` is a native function. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a native function, else `false`. - * @example - * - * _.isNative(Array.prototype.push); - * // => true - * - * _.isNative(_); - * // => false - */ - function isNative(value) { - if (value == null) { - return false; - } - if (objToString.call(value) == funcTag) { - return reIsNative.test(fnToString.call(value)); - } - return isObjectLike(value) && reIsHostCtor.test(value); - } - - /** - * Checks if `value` is `null`. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is `null`, else `false`. - * @example - * - * _.isNull(null); - * // => true - * - * _.isNull(void 0); - * // => false - */ - function isNull(value) { - return value === null; - } - - /** - * Checks if `value` is classified as a `Number` primitive or object. - * - * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified - * as numbers, use the `_.isFinite` method. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isNumber(8.4); - * // => true - * - * _.isNumber(NaN); - * // => true - * - * _.isNumber('8.4'); - * // => false - */ - function isNumber(value) { - return typeof value == 'number' || (isObjectLike(value) && objToString.call(value) == numberTag); - } - - /** - * Checks if `value` is a plain object, that is, an object created by the - * `Object` constructor or one with a `[[Prototype]]` of `null`. - * - * **Note:** This method assumes objects created by the `Object` constructor - * have no inherited enumerable properties. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. - * @example - * - * function Foo() { - * this.a = 1; - * } - * - * _.isPlainObject(new Foo); - * // => false - * - * _.isPlainObject([1, 2, 3]); - * // => false - * - * _.isPlainObject({ 'x': 0, 'y': 0 }); - * // => true - * - * _.isPlainObject(Object.create(null)); - * // => true - */ - var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) { - if (!(value && objToString.call(value) == objectTag)) { - return false; - } - var valueOf = value.valueOf, - objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto); - - return objProto - ? (value == objProto || getPrototypeOf(value) == objProto) - : shimIsPlainObject(value); - }; - - /** - * Checks if `value` is classified as a `RegExp` object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isRegExp(/abc/); - * // => true - * - * _.isRegExp('/abc/'); - * // => false - */ - function isRegExp(value) { - return (isObjectLike(value) && objToString.call(value) == regexpTag) || false; - } - - /** - * Checks if `value` is classified as a `String` primitive or object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isString('abc'); - * // => true - * - * _.isString(1); - * // => false - */ - function isString(value) { - return typeof value == 'string' || (isObjectLike(value) && objToString.call(value) == stringTag); - } - - /** - * Checks if `value` is classified as a typed array. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. - * @example - * - * _.isTypedArray(new Uint8Array); - * // => true - * - * _.isTypedArray([]); - * // => false - */ - function isTypedArray(value) { - return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[objToString.call(value)]; - } - - /** - * Checks if `value` is `undefined`. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`. - * @example - * - * _.isUndefined(void 0); - * // => true - * - * _.isUndefined(null); - * // => false - */ - function isUndefined(value) { - return value === undefined; - } - - /** - * Converts `value` to an array. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to convert. - * @returns {Array} Returns the converted array. - * @example - * - * (function() { - * return _.toArray(arguments).slice(1); - * }(1, 2, 3)); - * // => [2, 3] - */ - function toArray(value) { - var length = value ? getLength(value) : 0; - if (!isLength(length)) { - return values(value); - } - if (!length) { - return []; - } - return arrayCopy(value); - } - - /** - * Converts `value` to a plain object flattening inherited enumerable - * properties of `value` to own properties of the plain object. - * - * @static - * @memberOf _ - * @category Lang - * @param {*} value The value to convert. - * @returns {Object} Returns the converted plain object. - * @example - * - * function Foo() { - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.assign({ 'a': 1 }, new Foo); - * // => { 'a': 1, 'b': 2 } - * - * _.assign({ 'a': 1 }, _.toPlainObject(new Foo)); - * // => { 'a': 1, 'b': 2, 'c': 3 } - */ - function toPlainObject(value) { - return baseCopy(value, keysIn(value)); - } - - /*------------------------------------------------------------------------*/ - - /** - * Assigns own enumerable properties of source object(s) to the destination - * object. Subsequent sources overwrite property assignments of previous sources. - * If `customizer` is provided it is invoked to produce the assigned values. - * The `customizer` is bound to `thisArg` and invoked with five arguments: - * (objectValue, sourceValue, key, object, source). - * - * **Note:** This method mutates `object` and is based on - * [`Object.assign`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.assign). - * - * - * @static - * @memberOf _ - * @alias extend - * @category Object - * @param {Object} object The destination object. - * @param {...Object} [sources] The source objects. - * @param {Function} [customizer] The function to customize assigned values. - * @param {*} [thisArg] The `this` binding of `customizer`. - * @returns {Object} Returns `object`. - * @example - * - * _.assign({ 'user': 'barney' }, { 'age': 40 }, { 'user': 'fred' }); - * // => { 'user': 'fred', 'age': 40 } - * - * // using a customizer callback - * var defaults = _.partialRight(_.assign, function(value, other) { - * return _.isUndefined(value) ? other : value; - * }); - * - * defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' }); - * // => { 'user': 'barney', 'age': 36 } - */ - var assign = createAssigner(function(object, source, customizer) { - return customizer - ? assignWith(object, source, customizer) - : baseAssign(object, source); - }); - - /** - * Creates an object that inherits from the given `prototype` object. If a - * `properties` object is provided its own enumerable properties are assigned - * to the created object. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} prototype The object to inherit from. - * @param {Object} [properties] The properties to assign to the object. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Object} Returns the new object. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * function Circle() { - * Shape.call(this); - * } - * - * Circle.prototype = _.create(Shape.prototype, { - * 'constructor': Circle - * }); - * - * var circle = new Circle; - * circle instanceof Circle; - * // => true - * - * circle instanceof Shape; - * // => true - */ - function create(prototype, properties, guard) { - var result = baseCreate(prototype); - if (guard && isIterateeCall(prototype, properties, guard)) { - properties = null; - } - return properties ? baseAssign(result, properties) : result; - } - - /** - * Assigns own enumerable properties of source object(s) to the destination - * object for all destination properties that resolve to `undefined`. Once a - * property is set, additional values of the same property are ignored. - * - * **Note:** This method mutates `object`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The destination object. - * @param {...Object} [sources] The source objects. - * @returns {Object} Returns `object`. - * @example - * - * _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' }); - * // => { 'user': 'barney', 'age': 36 } - */ - var defaults = restParam(function(args) { - var object = args[0]; - if (object == null) { - return object; - } - args.push(assignDefaults); - return assign.apply(undefined, args); - }); - - /** - * This method is like `_.find` except that it returns the key of the first - * element `predicate` returns truthy for instead of the element itself. - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to search. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {string|undefined} Returns the key of the matched element, else `undefined`. - * @example - * - * var users = { - * 'barney': { 'age': 36, 'active': true }, - * 'fred': { 'age': 40, 'active': false }, - * 'pebbles': { 'age': 1, 'active': true } - * }; - * - * _.findKey(users, function(chr) { - * return chr.age < 40; - * }); - * // => 'barney' (iteration order is not guaranteed) - * - * // using the `_.matches` callback shorthand - * _.findKey(users, { 'age': 1, 'active': true }); - * // => 'pebbles' - * - * // using the `_.matchesProperty` callback shorthand - * _.findKey(users, 'active', false); - * // => 'fred' - * - * // using the `_.property` callback shorthand - * _.findKey(users, 'active'); - * // => 'barney' - */ - var findKey = createFindKey(baseForOwn); - - /** - * This method is like `_.findKey` except that it iterates over elements of - * a collection in the opposite order. - * - * If a property name is provided for `predicate` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `predicate` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to search. - * @param {Function|Object|string} [predicate=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {string|undefined} Returns the key of the matched element, else `undefined`. - * @example - * - * var users = { - * 'barney': { 'age': 36, 'active': true }, - * 'fred': { 'age': 40, 'active': false }, - * 'pebbles': { 'age': 1, 'active': true } - * }; - * - * _.findLastKey(users, function(chr) { - * return chr.age < 40; - * }); - * // => returns `pebbles` assuming `_.findKey` returns `barney` - * - * // using the `_.matches` callback shorthand - * _.findLastKey(users, { 'age': 36, 'active': true }); - * // => 'barney' - * - * // using the `_.matchesProperty` callback shorthand - * _.findLastKey(users, 'active', false); - * // => 'fred' - * - * // using the `_.property` callback shorthand - * _.findLastKey(users, 'active'); - * // => 'pebbles' - */ - var findLastKey = createFindKey(baseForOwnRight); - - /** - * Iterates over own and inherited enumerable properties of an object invoking - * `iteratee` for each property. The `iteratee` is bound to `thisArg` and invoked - * with three arguments: (value, key, object). Iteratee functions may exit - * iteration early by explicitly returning `false`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns `object`. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.forIn(new Foo, function(value, key) { - * console.log(key); - * }); - * // => logs 'a', 'b', and 'c' (iteration order is not guaranteed) - */ - var forIn = createForIn(baseFor); - - /** - * This method is like `_.forIn` except that it iterates over properties of - * `object` in the opposite order. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns `object`. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.forInRight(new Foo, function(value, key) { - * console.log(key); - * }); - * // => logs 'c', 'b', and 'a' assuming `_.forIn ` logs 'a', 'b', and 'c' - */ - var forInRight = createForIn(baseForRight); - - /** - * Iterates over own enumerable properties of an object invoking `iteratee` - * for each property. The `iteratee` is bound to `thisArg` and invoked with - * three arguments: (value, key, object). Iteratee functions may exit iteration - * early by explicitly returning `false`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns `object`. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.forOwn(new Foo, function(value, key) { - * console.log(key); - * }); - * // => logs 'a' and 'b' (iteration order is not guaranteed) - */ - var forOwn = createForOwn(baseForOwn); - - /** - * This method is like `_.forOwn` except that it iterates over properties of - * `object` in the opposite order. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns `object`. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.forOwnRight(new Foo, function(value, key) { - * console.log(key); - * }); - * // => logs 'b' and 'a' assuming `_.forOwn` logs 'a' and 'b' - */ - var forOwnRight = createForOwn(baseForOwnRight); - - /** - * Creates an array of function property names from all enumerable properties, - * own and inherited, of `object`. - * - * @static - * @memberOf _ - * @alias methods - * @category Object - * @param {Object} object The object to inspect. - * @returns {Array} Returns the new array of property names. - * @example - * - * _.functions(_); - * // => ['after', 'ary', 'assign', ...] - */ - function functions(object) { - return baseFunctions(object, keysIn(object)); - } - - /** - * Gets the property value of `path` on `object`. If the resolved value is - * `undefined` the `defaultValue` is used in its place. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @param {Array|string} path The path of the property to get. - * @param {*} [defaultValue] The value returned if the resolved value is `undefined`. - * @returns {*} Returns the resolved value. - * @example - * - * var object = { 'a': [{ 'b': { 'c': 3 } }] }; - * - * _.get(object, 'a[0].b.c'); - * // => 3 - * - * _.get(object, ['a', '0', 'b', 'c']); - * // => 3 - * - * _.get(object, 'a.b.c', 'default'); - * // => 'default' - */ - function get(object, path, defaultValue) { - var result = object == null ? undefined : baseGet(object, toPath(path), path + ''); - return result === undefined ? defaultValue : result; - } - - /** - * Checks if `path` is a direct property. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @param {Array|string} path The path to check. - * @returns {boolean} Returns `true` if `path` is a direct property, else `false`. - * @example - * - * var object = { 'a': { 'b': { 'c': 3 } } }; - * - * _.has(object, 'a'); - * // => true - * - * _.has(object, 'a.b.c'); - * // => true - * - * _.has(object, ['a', 'b', 'c']); - * // => true - */ - function has(object, path) { - if (object == null) { - return false; - } - var result = hasOwnProperty.call(object, path); - if (!result && !isKey(path)) { - path = toPath(path); - object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1)); - path = last(path); - result = object != null && hasOwnProperty.call(object, path); - } - return result; - } - - /** - * Creates an object composed of the inverted keys and values of `object`. - * If `object` contains duplicate values, subsequent values overwrite property - * assignments of previous values unless `multiValue` is `true`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to invert. - * @param {boolean} [multiValue] Allow multiple values per key. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Object} Returns the new inverted object. - * @example - * - * var object = { 'a': 1, 'b': 2, 'c': 1 }; - * - * _.invert(object); - * // => { '1': 'c', '2': 'b' } - * - * // with `multiValue` - * _.invert(object, true); - * // => { '1': ['a', 'c'], '2': ['b'] } - */ - function invert(object, multiValue, guard) { - if (guard && isIterateeCall(object, multiValue, guard)) { - multiValue = null; - } - var index = -1, - props = keys(object), - length = props.length, - result = {}; - - while (++index < length) { - var key = props[index], - value = object[key]; - - if (multiValue) { - if (hasOwnProperty.call(result, value)) { - result[value].push(key); - } else { - result[value] = [key]; - } - } - else { - result[value] = key; - } - } - return result; - } - - /** - * Creates an array of the own enumerable property names of `object`. - * - * **Note:** Non-object values are coerced to objects. See the - * [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.keys) - * for more details. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property names. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.keys(new Foo); - * // => ['a', 'b'] (iteration order is not guaranteed) - * - * _.keys('hi'); - * // => ['0', '1'] - */ - var keys = !nativeKeys ? shimKeys : function(object) { - if (object) { - var Ctor = object.constructor, - length = object.length; - } - if ((typeof Ctor == 'function' && Ctor.prototype === object) || - (typeof object != 'function' && isLength(length))) { - return shimKeys(object); - } - return isObject(object) ? nativeKeys(object) : []; - }; - - /** - * Creates an array of the own and inherited enumerable property names of `object`. - * - * **Note:** Non-object values are coerced to objects. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property names. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.keysIn(new Foo); - * // => ['a', 'b', 'c'] (iteration order is not guaranteed) - */ - function keysIn(object) { - if (object == null) { - return []; - } - if (!isObject(object)) { - object = Object(object); - } - var length = object.length; - length = (length && isLength(length) && - (isArray(object) || (support.nonEnumArgs && isArguments(object))) && length) || 0; - - var Ctor = object.constructor, - index = -1, - isProto = typeof Ctor == 'function' && Ctor.prototype === object, - result = Array(length), - skipIndexes = length > 0; - - while (++index < length) { - result[index] = (index + ''); - } - for (var key in object) { - if (!(skipIndexes && isIndex(key, length)) && - !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) { - result.push(key); - } - } - return result; - } - - /** - * Creates an object with the same keys as `object` and values generated by - * running each own enumerable property of `object` through `iteratee`. The - * iteratee function is bound to `thisArg` and invoked with three arguments: - * (value, key, object). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to iterate over. - * @param {Function|Object|string} [iteratee=_.identity] The function invoked - * per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Object} Returns the new mapped object. - * @example - * - * _.mapValues({ 'a': 1, 'b': 2 }, function(n) { - * return n * 3; - * }); - * // => { 'a': 3, 'b': 6 } - * - * var users = { - * 'fred': { 'user': 'fred', 'age': 40 }, - * 'pebbles': { 'user': 'pebbles', 'age': 1 } - * }; - * - * // using the `_.property` callback shorthand - * _.mapValues(users, 'age'); - * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed) - */ - function mapValues(object, iteratee, thisArg) { - var result = {}; - iteratee = getCallback(iteratee, thisArg, 3); - - baseForOwn(object, function(value, key, object) { - result[key] = iteratee(value, key, object); - }); - return result; - } - - /** - * Recursively merges own enumerable properties of the source object(s), that - * don't resolve to `undefined` into the destination object. Subsequent sources - * overwrite property assignments of previous sources. If `customizer` is - * provided it is invoked to produce the merged values of the destination and - * source properties. If `customizer` returns `undefined` merging is handled - * by the method instead. The `customizer` is bound to `thisArg` and invoked - * with five arguments: (objectValue, sourceValue, key, object, source). - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The destination object. - * @param {...Object} [sources] The source objects. - * @param {Function} [customizer] The function to customize assigned values. - * @param {*} [thisArg] The `this` binding of `customizer`. - * @returns {Object} Returns `object`. - * @example - * - * var users = { - * 'data': [{ 'user': 'barney' }, { 'user': 'fred' }] - * }; - * - * var ages = { - * 'data': [{ 'age': 36 }, { 'age': 40 }] - * }; - * - * _.merge(users, ages); - * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] } - * - * // using a customizer callback - * var object = { - * 'fruits': ['apple'], - * 'vegetables': ['beet'] - * }; - * - * var other = { - * 'fruits': ['banana'], - * 'vegetables': ['carrot'] - * }; - * - * _.merge(object, other, function(a, b) { - * if (_.isArray(a)) { - * return a.concat(b); - * } - * }); - * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] } - */ - var merge = createAssigner(baseMerge); - - /** - * The opposite of `_.pick`; this method creates an object composed of the - * own and inherited enumerable properties of `object` that are not omitted. - * Property names may be specified as individual arguments or as arrays of - * property names. If `predicate` is provided it is invoked for each property - * of `object` omitting the properties `predicate` returns truthy for. The - * predicate is bound to `thisArg` and invoked with three arguments: - * (value, key, object). - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The source object. - * @param {Function|...(string|string[])} [predicate] The function invoked per - * iteration or property names to omit, specified as individual property - * names or arrays of property names. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Object} Returns the new object. - * @example - * - * var object = { 'user': 'fred', 'age': 40 }; - * - * _.omit(object, 'age'); - * // => { 'user': 'fred' } - * - * _.omit(object, _.isNumber); - * // => { 'user': 'fred' } - */ - var omit = restParam(function(object, props) { - if (object == null) { - return {}; - } - if (typeof props[0] != 'function') { - var props = arrayMap(baseFlatten(props), String); - return pickByArray(object, baseDifference(keysIn(object), props)); - } - var predicate = bindCallback(props[0], props[1], 3); - return pickByCallback(object, function(value, key, object) { - return !predicate(value, key, object); - }); - }); - - /** - * Creates a two dimensional array of the key-value pairs for `object`, - * e.g. `[[key1, value1], [key2, value2]]`. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @returns {Array} Returns the new array of key-value pairs. - * @example - * - * _.pairs({ 'barney': 36, 'fred': 40 }); - * // => [['barney', 36], ['fred', 40]] (iteration order is not guaranteed) - */ - function pairs(object) { - var index = -1, - props = keys(object), - length = props.length, - result = Array(length); - - while (++index < length) { - var key = props[index]; - result[index] = [key, object[key]]; - } - return result; - } - - /** - * Creates an object composed of the picked `object` properties. Property - * names may be specified as individual arguments or as arrays of property - * names. If `predicate` is provided it is invoked for each property of `object` - * picking the properties `predicate` returns truthy for. The predicate is - * bound to `thisArg` and invoked with three arguments: (value, key, object). - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The source object. - * @param {Function|...(string|string[])} [predicate] The function invoked per - * iteration or property names to pick, specified as individual property - * names or arrays of property names. - * @param {*} [thisArg] The `this` binding of `predicate`. - * @returns {Object} Returns the new object. - * @example - * - * var object = { 'user': 'fred', 'age': 40 }; - * - * _.pick(object, 'user'); - * // => { 'user': 'fred' } - * - * _.pick(object, _.isString); - * // => { 'user': 'fred' } - */ - var pick = restParam(function(object, props) { - if (object == null) { - return {}; - } - return typeof props[0] == 'function' - ? pickByCallback(object, bindCallback(props[0], props[1], 3)) - : pickByArray(object, baseFlatten(props)); - }); - - /** - * This method is like `_.get` except that if the resolved value is a function - * it is invoked with the `this` binding of its parent object and its result - * is returned. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @param {Array|string} path The path of the property to resolve. - * @param {*} [defaultValue] The value returned if the resolved value is `undefined`. - * @returns {*} Returns the resolved value. - * @example - * - * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] }; - * - * _.result(object, 'a[0].b.c1'); - * // => 3 - * - * _.result(object, 'a[0].b.c2'); - * // => 4 - * - * _.result(object, 'a.b.c', 'default'); - * // => 'default' - * - * _.result(object, 'a.b.c', _.constant('default')); - * // => 'default' - */ - function result(object, path, defaultValue) { - var result = object == null ? undefined : object[path]; - if (result === undefined) { - if (object != null && !isKey(path, object)) { - path = toPath(path); - object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1)); - result = object == null ? undefined : object[last(path)]; - } - result = result === undefined ? defaultValue : result; - } - return isFunction(result) ? result.call(object) : result; - } - - /** - * Sets the property value of `path` on `object`. If a portion of `path` - * does not exist it is created. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to augment. - * @param {Array|string} path The path of the property to set. - * @param {*} value The value to set. - * @returns {Object} Returns `object`. - * @example - * - * var object = { 'a': [{ 'b': { 'c': 3 } }] }; - * - * _.set(object, 'a[0].b.c', 4); - * console.log(object.a[0].b.c); - * // => 4 - * - * _.set(object, 'x[0].y.z', 5); - * console.log(object.x[0].y.z); - * // => 5 - */ - function set(object, path, value) { - if (object == null) { - return object; - } - var pathKey = (path + ''); - path = (object[pathKey] != null || isKey(path, object)) ? [pathKey] : toPath(path); - - var index = -1, - length = path.length, - endIndex = length - 1, - nested = object; - - while (nested != null && ++index < length) { - var key = path[index]; - if (isObject(nested)) { - if (index == endIndex) { - nested[key] = value; - } else if (nested[key] == null) { - nested[key] = isIndex(path[index + 1]) ? [] : {}; - } - } - nested = nested[key]; - } - return object; - } - - /** - * An alternative to `_.reduce`; this method transforms `object` to a new - * `accumulator` object which is the result of running each of its own enumerable - * properties through `iteratee`, with each invocation potentially mutating - * the `accumulator` object. The `iteratee` is bound to `thisArg` and invoked - * with four arguments: (accumulator, value, key, object). Iteratee functions - * may exit iteration early by explicitly returning `false`. - * - * @static - * @memberOf _ - * @category Object - * @param {Array|Object} object The object to iterate over. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [accumulator] The custom accumulator value. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {*} Returns the accumulated value. - * @example - * - * _.transform([2, 3, 4], function(result, n) { - * result.push(n *= n); - * return n % 2 == 0; - * }); - * // => [4, 9] - * - * _.transform({ 'a': 1, 'b': 2 }, function(result, n, key) { - * result[key] = n * 3; - * }); - * // => { 'a': 3, 'b': 6 } - */ - function transform(object, iteratee, accumulator, thisArg) { - var isArr = isArray(object) || isTypedArray(object); - iteratee = getCallback(iteratee, thisArg, 4); - - if (accumulator == null) { - if (isArr || isObject(object)) { - var Ctor = object.constructor; - if (isArr) { - accumulator = isArray(object) ? new Ctor : []; - } else { - accumulator = baseCreate(isFunction(Ctor) && Ctor.prototype); - } - } else { - accumulator = {}; - } - } - (isArr ? arrayEach : baseForOwn)(object, function(value, index, object) { - return iteratee(accumulator, value, index, object); - }); - return accumulator; - } - - /** - * Creates an array of the own enumerable property values of `object`. - * - * **Note:** Non-object values are coerced to objects. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property values. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.values(new Foo); - * // => [1, 2] (iteration order is not guaranteed) - * - * _.values('hi'); - * // => ['h', 'i'] - */ - function values(object) { - return baseValues(object, keys(object)); - } - - /** - * Creates an array of the own and inherited enumerable property values - * of `object`. - * - * **Note:** Non-object values are coerced to objects. - * - * @static - * @memberOf _ - * @category Object - * @param {Object} object The object to query. - * @returns {Array} Returns the array of property values. - * @example - * - * function Foo() { - * this.a = 1; - * this.b = 2; - * } - * - * Foo.prototype.c = 3; - * - * _.valuesIn(new Foo); - * // => [1, 2, 3] (iteration order is not guaranteed) - */ - function valuesIn(object) { - return baseValues(object, keysIn(object)); - } - - /*------------------------------------------------------------------------*/ - - /** - * Checks if `n` is between `start` and up to but not including, `end`. If - * `end` is not specified it is set to `start` with `start` then set to `0`. - * - * @static - * @memberOf _ - * @category Number - * @param {number} n The number to check. - * @param {number} [start=0] The start of the range. - * @param {number} end The end of the range. - * @returns {boolean} Returns `true` if `n` is in the range, else `false`. - * @example - * - * _.inRange(3, 2, 4); - * // => true - * - * _.inRange(4, 8); - * // => true - * - * _.inRange(4, 2); - * // => false - * - * _.inRange(2, 2); - * // => false - * - * _.inRange(1.2, 2); - * // => true - * - * _.inRange(5.2, 4); - * // => false - */ - function inRange(value, start, end) { - start = +start || 0; - if (typeof end === 'undefined') { - end = start; - start = 0; - } else { - end = +end || 0; - } - return value >= nativeMin(start, end) && value < nativeMax(start, end); - } - - /** - * Produces a random number between `min` and `max` (inclusive). If only one - * argument is provided a number between `0` and the given number is returned. - * If `floating` is `true`, or either `min` or `max` are floats, a floating-point - * number is returned instead of an integer. - * - * @static - * @memberOf _ - * @category Number - * @param {number} [min=0] The minimum possible value. - * @param {number} [max=1] The maximum possible value. - * @param {boolean} [floating] Specify returning a floating-point number. - * @returns {number} Returns the random number. - * @example - * - * _.random(0, 5); - * // => an integer between 0 and 5 - * - * _.random(5); - * // => also an integer between 0 and 5 - * - * _.random(5, true); - * // => a floating-point number between 0 and 5 - * - * _.random(1.2, 5.2); - * // => a floating-point number between 1.2 and 5.2 - */ - function random(min, max, floating) { - if (floating && isIterateeCall(min, max, floating)) { - max = floating = null; - } - var noMin = min == null, - noMax = max == null; - - if (floating == null) { - if (noMax && typeof min == 'boolean') { - floating = min; - min = 1; - } - else if (typeof max == 'boolean') { - floating = max; - noMax = true; - } - } - if (noMin && noMax) { - max = 1; - noMax = false; - } - min = +min || 0; - if (noMax) { - max = min; - min = 0; - } else { - max = +max || 0; - } - if (floating || min % 1 || max % 1) { - var rand = nativeRandom(); - return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand + '').length - 1)))), max); - } - return baseRandom(min, max); - } - - /*------------------------------------------------------------------------*/ - - /** - * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to convert. - * @returns {string} Returns the camel cased string. - * @example - * - * _.camelCase('Foo Bar'); - * // => 'fooBar' - * - * _.camelCase('--foo-bar'); - * // => 'fooBar' - * - * _.camelCase('__foo_bar__'); - * // => 'fooBar' - */ - var camelCase = createCompounder(function(result, word, index) { - word = word.toLowerCase(); - return result + (index ? (word.charAt(0).toUpperCase() + word.slice(1)) : word); - }); - - /** - * Capitalizes the first character of `string`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to capitalize. - * @returns {string} Returns the capitalized string. - * @example - * - * _.capitalize('fred'); - * // => 'Fred' - */ - function capitalize(string) { - string = baseToString(string); - return string && (string.charAt(0).toUpperCase() + string.slice(1)); - } - - /** - * Deburrs `string` by converting [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table) - * to basic latin letters and removing [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to deburr. - * @returns {string} Returns the deburred string. - * @example - * - * _.deburr('déjà vu'); - * // => 'deja vu' - */ - function deburr(string) { - string = baseToString(string); - return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, ''); - } - - /** - * Checks if `string` ends with the given target string. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to search. - * @param {string} [target] The string to search for. - * @param {number} [position=string.length] The position to search from. - * @returns {boolean} Returns `true` if `string` ends with `target`, else `false`. - * @example - * - * _.endsWith('abc', 'c'); - * // => true - * - * _.endsWith('abc', 'b'); - * // => false - * - * _.endsWith('abc', 'b', 2); - * // => true - */ - function endsWith(string, target, position) { - string = baseToString(string); - target = (target + ''); - - var length = string.length; - position = position === undefined - ? length - : nativeMin(position < 0 ? 0 : (+position || 0), length); - - position -= target.length; - return position >= 0 && string.indexOf(target, position) == position; - } - - /** - * Converts the characters "&", "<", ">", '"', "'", and "\`", in `string` to - * their corresponding HTML entities. - * - * **Note:** No other characters are escaped. To escape additional characters - * use a third-party library like [_he_](https://mths.be/he). - * - * Though the ">" character is escaped for symmetry, characters like - * ">" and "/" don't require escaping in HTML and have no special meaning - * unless they're part of a tag or unquoted attribute value. - * See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands) - * (under "semi-related fun fact") for more details. - * - * Backticks are escaped because in Internet Explorer < 9, they can break out - * of attribute values or HTML comments. See [#59](https://html5sec.org/#59), - * [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and - * [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https://html5sec.org/) - * for more details. - * - * When working with HTML you should always [quote attribute values](http://wonko.com/post/html-escaping) - * to reduce XSS vectors. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to escape. - * @returns {string} Returns the escaped string. - * @example - * - * _.escape('fred, barney, & pebbles'); - * // => 'fred, barney, & pebbles' - */ - function escape(string) { - // Reset `lastIndex` because in IE < 9 `String#replace` does not. - string = baseToString(string); - return (string && reHasUnescapedHtml.test(string)) - ? string.replace(reUnescapedHtml, escapeHtmlChar) - : string; - } - - /** - * Escapes the `RegExp` special characters "\", "/", "^", "$", ".", "|", "?", - * "*", "+", "(", ")", "[", "]", "{" and "}" in `string`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to escape. - * @returns {string} Returns the escaped string. - * @example - * - * _.escapeRegExp('[lodash](https://lodash.com/)'); - * // => '\[lodash\]\(https:\/\/lodash\.com\/\)' - */ - function escapeRegExp(string) { - string = baseToString(string); - return (string && reHasRegExpChars.test(string)) - ? string.replace(reRegExpChars, '\\$&') - : string; - } - - /** - * Converts `string` to [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to convert. - * @returns {string} Returns the kebab cased string. - * @example - * - * _.kebabCase('Foo Bar'); - * // => 'foo-bar' - * - * _.kebabCase('fooBar'); - * // => 'foo-bar' - * - * _.kebabCase('__foo_bar__'); - * // => 'foo-bar' - */ - var kebabCase = createCompounder(function(result, word, index) { - return result + (index ? '-' : '') + word.toLowerCase(); - }); - - /** - * Pads `string` on the left and right sides if it is shorter than `length`. - * Padding characters are truncated if they can't be evenly divided by `length`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to pad. - * @param {number} [length=0] The padding length. - * @param {string} [chars=' '] The string used as padding. - * @returns {string} Returns the padded string. - * @example - * - * _.pad('abc', 8); - * // => ' abc ' - * - * _.pad('abc', 8, '_-'); - * // => '_-abc_-_' - * - * _.pad('abc', 3); - * // => 'abc' - */ - function pad(string, length, chars) { - string = baseToString(string); - length = +length; - - var strLength = string.length; - if (strLength >= length || !nativeIsFinite(length)) { - return string; - } - var mid = (length - strLength) / 2, - leftLength = floor(mid), - rightLength = ceil(mid); - - chars = createPadding('', rightLength, chars); - return chars.slice(0, leftLength) + string + chars; - } - - /** - * Pads `string` on the left side if it is shorter than `length`. Padding - * characters are truncated if they exceed `length`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to pad. - * @param {number} [length=0] The padding length. - * @param {string} [chars=' '] The string used as padding. - * @returns {string} Returns the padded string. - * @example - * - * _.padLeft('abc', 6); - * // => ' abc' - * - * _.padLeft('abc', 6, '_-'); - * // => '_-_abc' - * - * _.padLeft('abc', 3); - * // => 'abc' - */ - var padLeft = createPadDir(); - - /** - * Pads `string` on the right side if it is shorter than `length`. Padding - * characters are truncated if they exceed `length`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to pad. - * @param {number} [length=0] The padding length. - * @param {string} [chars=' '] The string used as padding. - * @returns {string} Returns the padded string. - * @example - * - * _.padRight('abc', 6); - * // => 'abc ' - * - * _.padRight('abc', 6, '_-'); - * // => 'abc_-_' - * - * _.padRight('abc', 3); - * // => 'abc' - */ - var padRight = createPadDir(true); - - /** - * Converts `string` to an integer of the specified radix. If `radix` is - * `undefined` or `0`, a `radix` of `10` is used unless `value` is a hexadecimal, - * in which case a `radix` of `16` is used. - * - * **Note:** This method aligns with the [ES5 implementation](https://es5.github.io/#E) - * of `parseInt`. - * - * @static - * @memberOf _ - * @category String - * @param {string} string The string to convert. - * @param {number} [radix] The radix to interpret `value` by. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {number} Returns the converted integer. - * @example - * - * _.parseInt('08'); - * // => 8 - * - * _.map(['6', '08', '10'], _.parseInt); - * // => [6, 8, 10] - */ - function parseInt(string, radix, guard) { - if (guard && isIterateeCall(string, radix, guard)) { - radix = 0; - } - return nativeParseInt(string, radix); - } - // Fallback for environments with pre-ES5 implementations. - if (nativeParseInt(whitespace + '08') != 8) { - parseInt = function(string, radix, guard) { - // Firefox < 21 and Opera < 15 follow ES3 for `parseInt`. - // Chrome fails to trim leading <BOM> whitespace characters. - // See https://code.google.com/p/v8/issues/detail?id=3109 for more details. - if (guard ? isIterateeCall(string, radix, guard) : radix == null) { - radix = 0; - } else if (radix) { - radix = +radix; - } - string = trim(string); - return nativeParseInt(string, radix || (reHasHexPrefix.test(string) ? 16 : 10)); - }; - } - - /** - * Repeats the given string `n` times. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to repeat. - * @param {number} [n=0] The number of times to repeat the string. - * @returns {string} Returns the repeated string. - * @example - * - * _.repeat('*', 3); - * // => '***' - * - * _.repeat('abc', 2); - * // => 'abcabc' - * - * _.repeat('abc', 0); - * // => '' - */ - function repeat(string, n) { - var result = ''; - string = baseToString(string); - n = +n; - if (n < 1 || !string || !nativeIsFinite(n)) { - return result; - } - // Leverage the exponentiation by squaring algorithm for a faster repeat. - // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details. - do { - if (n % 2) { - result += string; - } - n = floor(n / 2); - string += string; - } while (n); - - return result; - } - - /** - * Converts `string` to [snake case](https://en.wikipedia.org/wiki/Snake_case). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to convert. - * @returns {string} Returns the snake cased string. - * @example - * - * _.snakeCase('Foo Bar'); - * // => 'foo_bar' - * - * _.snakeCase('fooBar'); - * // => 'foo_bar' - * - * _.snakeCase('--foo-bar'); - * // => 'foo_bar' - */ - var snakeCase = createCompounder(function(result, word, index) { - return result + (index ? '_' : '') + word.toLowerCase(); - }); - - /** - * Converts `string` to [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to convert. - * @returns {string} Returns the start cased string. - * @example - * - * _.startCase('--foo-bar'); - * // => 'Foo Bar' - * - * _.startCase('fooBar'); - * // => 'Foo Bar' - * - * _.startCase('__foo_bar__'); - * // => 'Foo Bar' - */ - var startCase = createCompounder(function(result, word, index) { - return result + (index ? ' ' : '') + (word.charAt(0).toUpperCase() + word.slice(1)); - }); - - /** - * Checks if `string` starts with the given target string. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to search. - * @param {string} [target] The string to search for. - * @param {number} [position=0] The position to search from. - * @returns {boolean} Returns `true` if `string` starts with `target`, else `false`. - * @example - * - * _.startsWith('abc', 'a'); - * // => true - * - * _.startsWith('abc', 'b'); - * // => false - * - * _.startsWith('abc', 'b', 1); - * // => true - */ - function startsWith(string, target, position) { - string = baseToString(string); - position = position == null - ? 0 - : nativeMin(position < 0 ? 0 : (+position || 0), string.length); - - return string.lastIndexOf(target, position) == position; - } - - /** - * Creates a compiled template function that can interpolate data properties - * in "interpolate" delimiters, HTML-escape interpolated data properties in - * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data - * properties may be accessed as free variables in the template. If a setting - * object is provided it takes precedence over `_.templateSettings` values. - * - * **Note:** In the development build `_.template` utilizes - * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl) - * for easier debugging. - * - * For more information on precompiling templates see - * [lodash's custom builds documentation](https://lodash.com/custom-builds). - * - * For more information on Chrome extension sandboxes see - * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The template string. - * @param {Object} [options] The options object. - * @param {RegExp} [options.escape] The HTML "escape" delimiter. - * @param {RegExp} [options.evaluate] The "evaluate" delimiter. - * @param {Object} [options.imports] An object to import into the template as free variables. - * @param {RegExp} [options.interpolate] The "interpolate" delimiter. - * @param {string} [options.sourceURL] The sourceURL of the template's compiled source. - * @param {string} [options.variable] The data object variable name. - * @param- {Object} [otherOptions] Enables the legacy `options` param signature. - * @returns {Function} Returns the compiled template function. - * @example - * - * // using the "interpolate" delimiter to create a compiled template - * var compiled = _.template('hello <%= user %>!'); - * compiled({ 'user': 'fred' }); - * // => 'hello fred!' - * - * // using the HTML "escape" delimiter to escape data property values - * var compiled = _.template('<b><%- value %></b>'); - * compiled({ 'value': '<script>' }); - * // => '<b><script></b>' - * - * // using the "evaluate" delimiter to execute JavaScript and generate HTML - * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>'); - * compiled({ 'users': ['fred', 'barney'] }); - * // => '<li>fred</li><li>barney</li>' - * - * // using the internal `print` function in "evaluate" delimiters - * var compiled = _.template('<% print("hello " + user); %>!'); - * compiled({ 'user': 'barney' }); - * // => 'hello barney!' - * - * // using the ES delimiter as an alternative to the default "interpolate" delimiter - * var compiled = _.template('hello ${ user }!'); - * compiled({ 'user': 'pebbles' }); - * // => 'hello pebbles!' - * - * // using custom template delimiters - * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g; - * var compiled = _.template('hello {{ user }}!'); - * compiled({ 'user': 'mustache' }); - * // => 'hello mustache!' - * - * // using backslashes to treat delimiters as plain text - * var compiled = _.template('<%= "\\<%- value %\\>" %>'); - * compiled({ 'value': 'ignored' }); - * // => '<%- value %>' - * - * // using the `imports` option to import `jQuery` as `jq` - * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>'; - * var compiled = _.template(text, { 'imports': { 'jq': jQuery } }); - * compiled({ 'users': ['fred', 'barney'] }); - * // => '<li>fred</li><li>barney</li>' - * - * // using the `sourceURL` option to specify a custom sourceURL for the template - * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' }); - * compiled(data); - * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector - * - * // using the `variable` option to ensure a with-statement isn't used in the compiled template - * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' }); - * compiled.source; - * // => function(data) { - * // var __t, __p = ''; - * // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!'; - * // return __p; - * // } - * - * // using the `source` property to inline compiled templates for meaningful - * // line numbers in error messages and a stack trace - * fs.writeFileSync(path.join(cwd, 'jst.js'), '\ - * var JST = {\ - * "main": ' + _.template(mainText).source + '\ - * };\ - * '); - */ - function template(string, options, otherOptions) { - // Based on John Resig's `tmpl` implementation (http://ejohn.org/blog/javascript-micro-templating/) - // and Laura Doktorova's doT.js (https://github.com/olado/doT). - var settings = lodash.templateSettings; - - if (otherOptions && isIterateeCall(string, options, otherOptions)) { - options = otherOptions = null; - } - string = baseToString(string); - options = assignWith(baseAssign({}, otherOptions || options), settings, assignOwnDefaults); - - var imports = assignWith(baseAssign({}, options.imports), settings.imports, assignOwnDefaults), - importsKeys = keys(imports), - importsValues = baseValues(imports, importsKeys); - - var isEscaping, - isEvaluating, - index = 0, - interpolate = options.interpolate || reNoMatch, - source = "__p += '"; - - // Compile the regexp to match each delimiter. - var reDelimiters = RegExp( - (options.escape || reNoMatch).source + '|' + - interpolate.source + '|' + - (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' + - (options.evaluate || reNoMatch).source + '|$' - , 'g'); - - // Use a sourceURL for easier debugging. - var sourceURL = '//# sourceURL=' + - ('sourceURL' in options - ? options.sourceURL - : ('lodash.templateSources[' + (++templateCounter) + ']') - ) + '\n'; - - string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) { - interpolateValue || (interpolateValue = esTemplateValue); - - // Escape characters that can't be included in string literals. - source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar); - - // Replace delimiters with snippets. - if (escapeValue) { - isEscaping = true; - source += "' +\n__e(" + escapeValue + ") +\n'"; - } - if (evaluateValue) { - isEvaluating = true; - source += "';\n" + evaluateValue + ";\n__p += '"; - } - if (interpolateValue) { - source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'"; - } - index = offset + match.length; - - // The JS engine embedded in Adobe products requires returning the `match` - // string in order to produce the correct `offset` value. - return match; - }); - - source += "';\n"; - - // If `variable` is not specified wrap a with-statement around the generated - // code to add the data object to the top of the scope chain. - var variable = options.variable; - if (!variable) { - source = 'with (obj) {\n' + source + '\n}\n'; - } - // Cleanup code by stripping empty strings. - source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source) - .replace(reEmptyStringMiddle, '$1') - .replace(reEmptyStringTrailing, '$1;'); - - // Frame code as the function body. - source = 'function(' + (variable || 'obj') + ') {\n' + - (variable - ? '' - : 'obj || (obj = {});\n' - ) + - "var __t, __p = ''" + - (isEscaping - ? ', __e = _.escape' - : '' - ) + - (isEvaluating - ? ', __j = Array.prototype.join;\n' + - "function print() { __p += __j.call(arguments, '') }\n" - : ';\n' - ) + - source + - 'return __p\n}'; - - var result = attempt(function() { - return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined, importsValues); - }); - - // Provide the compiled function's source by its `toString` method or - // the `source` property as a convenience for inlining compiled templates. - result.source = source; - if (isError(result)) { - throw result; - } - return result; - } - - /** - * Removes leading and trailing whitespace or specified characters from `string`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to trim. - * @param {string} [chars=whitespace] The characters to trim. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {string} Returns the trimmed string. - * @example - * - * _.trim(' abc '); - * // => 'abc' - * - * _.trim('-_-abc-_-', '_-'); - * // => 'abc' - * - * _.map([' foo ', ' bar '], _.trim); - * // => ['foo', 'bar'] - */ - function trim(string, chars, guard) { - var value = string; - string = baseToString(string); - if (!string) { - return string; - } - if (guard ? isIterateeCall(value, chars, guard) : chars == null) { - return string.slice(trimmedLeftIndex(string), trimmedRightIndex(string) + 1); - } - chars = (chars + ''); - return string.slice(charsLeftIndex(string, chars), charsRightIndex(string, chars) + 1); - } - - /** - * Removes leading whitespace or specified characters from `string`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to trim. - * @param {string} [chars=whitespace] The characters to trim. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {string} Returns the trimmed string. - * @example - * - * _.trimLeft(' abc '); - * // => 'abc ' - * - * _.trimLeft('-_-abc-_-', '_-'); - * // => 'abc-_-' - */ - function trimLeft(string, chars, guard) { - var value = string; - string = baseToString(string); - if (!string) { - return string; - } - if (guard ? isIterateeCall(value, chars, guard) : chars == null) { - return string.slice(trimmedLeftIndex(string)); - } - return string.slice(charsLeftIndex(string, (chars + ''))); - } - - /** - * Removes trailing whitespace or specified characters from `string`. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to trim. - * @param {string} [chars=whitespace] The characters to trim. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {string} Returns the trimmed string. - * @example - * - * _.trimRight(' abc '); - * // => ' abc' - * - * _.trimRight('-_-abc-_-', '_-'); - * // => '-_-abc' - */ - function trimRight(string, chars, guard) { - var value = string; - string = baseToString(string); - if (!string) { - return string; - } - if (guard ? isIterateeCall(value, chars, guard) : chars == null) { - return string.slice(0, trimmedRightIndex(string) + 1); - } - return string.slice(0, charsRightIndex(string, (chars + '')) + 1); - } - - /** - * Truncates `string` if it is longer than the given maximum string length. - * The last characters of the truncated string are replaced with the omission - * string which defaults to "...". - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to truncate. - * @param {Object|number} [options] The options object or maximum string length. - * @param {number} [options.length=30] The maximum string length. - * @param {string} [options.omission='...'] The string to indicate text is omitted. - * @param {RegExp|string} [options.separator] The separator pattern to truncate to. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {string} Returns the truncated string. - * @example - * - * _.trunc('hi-diddly-ho there, neighborino'); - * // => 'hi-diddly-ho there, neighbo...' - * - * _.trunc('hi-diddly-ho there, neighborino', 24); - * // => 'hi-diddly-ho there, n...' - * - * _.trunc('hi-diddly-ho there, neighborino', { - * 'length': 24, - * 'separator': ' ' - * }); - * // => 'hi-diddly-ho there,...' - * - * _.trunc('hi-diddly-ho there, neighborino', { - * 'length': 24, - * 'separator': /,? +/ - * }); - * // => 'hi-diddly-ho there...' - * - * _.trunc('hi-diddly-ho there, neighborino', { - * 'omission': ' [...]' - * }); - * // => 'hi-diddly-ho there, neig [...]' - */ - function trunc(string, options, guard) { - if (guard && isIterateeCall(string, options, guard)) { - options = null; - } - var length = DEFAULT_TRUNC_LENGTH, - omission = DEFAULT_TRUNC_OMISSION; - - if (options != null) { - if (isObject(options)) { - var separator = 'separator' in options ? options.separator : separator; - length = 'length' in options ? (+options.length || 0) : length; - omission = 'omission' in options ? baseToString(options.omission) : omission; - } else { - length = +options || 0; - } - } - string = baseToString(string); - if (length >= string.length) { - return string; - } - var end = length - omission.length; - if (end < 1) { - return omission; - } - var result = string.slice(0, end); - if (separator == null) { - return result + omission; - } - if (isRegExp(separator)) { - if (string.slice(end).search(separator)) { - var match, - newEnd, - substring = string.slice(0, end); - - if (!separator.global) { - separator = RegExp(separator.source, (reFlags.exec(separator) || '') + 'g'); - } - separator.lastIndex = 0; - while ((match = separator.exec(substring))) { - newEnd = match.index; - } - result = result.slice(0, newEnd == null ? end : newEnd); - } - } else if (string.indexOf(separator, end) != end) { - var index = result.lastIndexOf(separator); - if (index > -1) { - result = result.slice(0, index); - } - } - return result + omission; - } - - /** - * The inverse of `_.escape`; this method converts the HTML entities - * `&`, `<`, `>`, `"`, `'`, and ``` in `string` to their - * corresponding characters. - * - * **Note:** No other HTML entities are unescaped. To unescape additional HTML - * entities use a third-party library like [_he_](https://mths.be/he). - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to unescape. - * @returns {string} Returns the unescaped string. - * @example - * - * _.unescape('fred, barney, & pebbles'); - * // => 'fred, barney, & pebbles' - */ - function unescape(string) { - string = baseToString(string); - return (string && reHasEscapedHtml.test(string)) - ? string.replace(reEscapedHtml, unescapeHtmlChar) - : string; - } - - /** - * Splits `string` into an array of its words. - * - * @static - * @memberOf _ - * @category String - * @param {string} [string=''] The string to inspect. - * @param {RegExp|string} [pattern] The pattern to match words. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Array} Returns the words of `string`. - * @example - * - * _.words('fred, barney, & pebbles'); - * // => ['fred', 'barney', 'pebbles'] - * - * _.words('fred, barney, & pebbles', /[^, ]+/g); - * // => ['fred', 'barney', '&', 'pebbles'] - */ - function words(string, pattern, guard) { - if (guard && isIterateeCall(string, pattern, guard)) { - pattern = null; - } - string = baseToString(string); - return string.match(pattern || reWords) || []; - } - - /*------------------------------------------------------------------------*/ - - /** - * Attempts to invoke `func`, returning either the result or the caught error - * object. Any additional arguments are provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Utility - * @param {Function} func The function to attempt. - * @returns {*} Returns the `func` result or error object. - * @example - * - * // avoid throwing errors for invalid selectors - * var elements = _.attempt(function(selector) { - * return document.querySelectorAll(selector); - * }, '>_>'); - * - * if (_.isError(elements)) { - * elements = []; - * } - */ - var attempt = restParam(function(func, args) { - try { - return func.apply(undefined, args); - } catch(e) { - return isError(e) ? e : new Error(e); - } - }); - - /** - * Creates a function that invokes `func` with the `this` binding of `thisArg` - * and arguments of the created function. If `func` is a property name the - * created callback returns the property value for a given element. If `func` - * is an object the created callback returns `true` for elements that contain - * the equivalent object properties, otherwise it returns `false`. - * - * @static - * @memberOf _ - * @alias iteratee - * @category Utility - * @param {*} [func=_.identity] The value to convert to a callback. - * @param {*} [thisArg] The `this` binding of `func`. - * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. - * @returns {Function} Returns the callback. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 40 } - * ]; - * - * // wrap to create custom callback shorthands - * _.callback = _.wrap(_.callback, function(callback, func, thisArg) { - * var match = /^(.+?)__([gl]t)(.+)$/.exec(func); - * if (!match) { - * return callback(func, thisArg); - * } - * return function(object) { - * return match[2] == 'gt' - * ? object[match[1]] > match[3] - * : object[match[1]] < match[3]; - * }; - * }); - * - * _.filter(users, 'age__gt36'); - * // => [{ 'user': 'fred', 'age': 40 }] - */ - function callback(func, thisArg, guard) { - if (guard && isIterateeCall(func, thisArg, guard)) { - thisArg = null; - } - return baseCallback(func, thisArg); - } - - /** - * Creates a function that returns `value`. - * - * @static - * @memberOf _ - * @category Utility - * @param {*} value The value to return from the new function. - * @returns {Function} Returns the new function. - * @example - * - * var object = { 'user': 'fred' }; - * var getter = _.constant(object); - * - * getter() === object; - * // => true - */ - function constant(value) { - return function() { - return value; - }; - } - - /** - * This method returns the first argument provided to it. - * - * @static - * @memberOf _ - * @category Utility - * @param {*} value Any value. - * @returns {*} Returns `value`. - * @example - * - * var object = { 'user': 'fred' }; - * - * _.identity(object) === object; - * // => true - */ - function identity(value) { - return value; - } - - /** - * Creates a function which performs a deep comparison between a given object - * and `source`, returning `true` if the given object has equivalent property - * values, else `false`. - * - * **Note:** This method supports comparing arrays, booleans, `Date` objects, - * numbers, `Object` objects, regexes, and strings. Objects are compared by - * their own, not inherited, enumerable properties. For comparing a single - * own or inherited property value see `_.matchesProperty`. - * - * @static - * @memberOf _ - * @category Utility - * @param {Object} source The object of property values to match. - * @returns {Function} Returns the new function. - * @example - * - * var users = [ - * { 'user': 'barney', 'age': 36, 'active': true }, - * { 'user': 'fred', 'age': 40, 'active': false } - * ]; - * - * _.filter(users, _.matches({ 'age': 40, 'active': false })); - * // => [{ 'user': 'fred', 'age': 40, 'active': false }] - */ - function matches(source) { - return baseMatches(baseClone(source, true)); - } - - /** - * Creates a function which compares the property value of `path` on a given - * object to `value`. - * - * **Note:** This method supports comparing arrays, booleans, `Date` objects, - * numbers, `Object` objects, regexes, and strings. Objects are compared by - * their own, not inherited, enumerable properties. - * - * @static - * @memberOf _ - * @category Utility - * @param {Array|string} path The path of the property to get. - * @param {*} value The value to compare. - * @returns {Function} Returns the new function. - * @example - * - * var users = [ - * { 'user': 'barney' }, - * { 'user': 'fred' } - * ]; - * - * _.find(users, _.matchesProperty('user', 'fred')); - * // => { 'user': 'fred' } - */ - function matchesProperty(path, value) { - return baseMatchesProperty(path, baseClone(value, true)); - } - - /** - * Creates a function which invokes the method at `path` on a given object. - * - * @static - * @memberOf _ - * @category Utility - * @param {Array|string} path The path of the method to invoke. - * @returns {Function} Returns the new function. - * @example - * - * var objects = [ - * { 'a': { 'b': { 'c': _.constant(2) } } }, - * { 'a': { 'b': { 'c': _.constant(1) } } } - * ]; - * - * _.map(objects, _.method('a.b.c')); - * // => [2, 1] - * - * _.invoke(_.sortBy(objects, _.method(['a', 'b', 'c'])), 'a.b.c'); - * // => [1, 2] - */ - var method = restParam(function(path, args) { - return function(object) { - return invokePath(object, path, args); - } - }); - - /** - * The opposite of `_.method`; this method creates a function which invokes - * the method at a given path on `object`. - * - * @static - * @memberOf _ - * @category Utility - * @param {Object} object The object to query. - * @returns {Function} Returns the new function. - * @example - * - * var array = _.times(3, _.constant), - * object = { 'a': array, 'b': array, 'c': array }; - * - * _.map(['a[2]', 'c[0]'], _.methodOf(object)); - * // => [2, 0] - * - * _.map([['a', '2'], ['c', '0']], _.methodOf(object)); - * // => [2, 0] - */ - var methodOf = restParam(function(object, args) { - return function(path) { - return invokePath(object, path, args); - }; - }); - - /** - * Adds all own enumerable function properties of a source object to the - * destination object. If `object` is a function then methods are added to - * its prototype as well. - * - * **Note:** Use `_.runInContext` to create a pristine `lodash` function to - * avoid conflicts caused by modifying the original. - * - * @static - * @memberOf _ - * @category Utility - * @param {Function|Object} [object=lodash] The destination object. - * @param {Object} source The object of functions to add. - * @param {Object} [options] The options object. - * @param {boolean} [options.chain=true] Specify whether the functions added - * are chainable. - * @returns {Function|Object} Returns `object`. - * @example - * - * function vowels(string) { - * return _.filter(string, function(v) { - * return /[aeiou]/i.test(v); - * }); - * } - * - * // use `_.runInContext` to avoid conflicts (esp. in Node.js) - * var _ = require('lodash').runInContext(); - * - * _.mixin({ 'vowels': vowels }); - * _.vowels('fred'); - * // => ['e'] - * - * _('fred').vowels().value(); - * // => ['e'] - * - * _.mixin({ 'vowels': vowels }, { 'chain': false }); - * _('fred').vowels(); - * // => ['e'] - */ - function mixin(object, source, options) { - if (options == null) { - var isObj = isObject(source), - props = isObj && keys(source), - methodNames = props && props.length && baseFunctions(source, props); - - if (!(methodNames ? methodNames.length : isObj)) { - methodNames = false; - options = source; - source = object; - object = this; - } - } - if (!methodNames) { - methodNames = baseFunctions(source, keys(source)); - } - var chain = true, - index = -1, - isFunc = isFunction(object), - length = methodNames.length; - - if (options === false) { - chain = false; - } else if (isObject(options) && 'chain' in options) { - chain = options.chain; - } - while (++index < length) { - var methodName = methodNames[index], - func = source[methodName]; - - object[methodName] = func; - if (isFunc) { - object.prototype[methodName] = (function(func) { - return function() { - var chainAll = this.__chain__; - if (chain || chainAll) { - var result = object(this.__wrapped__), - actions = result.__actions__ = arrayCopy(this.__actions__); - - actions.push({ 'func': func, 'args': arguments, 'thisArg': object }); - result.__chain__ = chainAll; - return result; - } - var args = [this.value()]; - push.apply(args, arguments); - return func.apply(object, args); - }; - }(func)); - } - } - return object; - } - - /** - * Reverts the `_` variable to its previous value and returns a reference to - * the `lodash` function. - * - * @static - * @memberOf _ - * @category Utility - * @returns {Function} Returns the `lodash` function. - * @example - * - * var lodash = _.noConflict(); - */ - function noConflict() { - context._ = oldDash; - return this; - } - - /** - * A no-operation function which returns `undefined` regardless of the - * arguments it receives. - * - * @static - * @memberOf _ - * @category Utility - * @example - * - * var object = { 'user': 'fred' }; - * - * _.noop(object) === undefined; - * // => true - */ - function noop() { - // No operation performed. - } - - /** - * Creates a function which returns the property value at `path` on a - * given object. - * - * @static - * @memberOf _ - * @category Utility - * @param {Array|string} path The path of the property to get. - * @returns {Function} Returns the new function. - * @example - * - * var objects = [ - * { 'a': { 'b': { 'c': 2 } } }, - * { 'a': { 'b': { 'c': 1 } } } - * ]; - * - * _.map(objects, _.property('a.b.c')); - * // => [2, 1] - * - * _.pluck(_.sortBy(objects, _.property(['a', 'b', 'c'])), 'a.b.c'); - * // => [1, 2] - */ - function property(path) { - return isKey(path) ? baseProperty(path) : basePropertyDeep(path); - } - - /** - * The opposite of `_.property`; this method creates a function which returns - * the property value at a given path on `object`. - * - * @static - * @memberOf _ - * @category Utility - * @param {Object} object The object to query. - * @returns {Function} Returns the new function. - * @example - * - * var array = [0, 1, 2], - * object = { 'a': array, 'b': array, 'c': array }; - * - * _.map(['a[2]', 'c[0]'], _.propertyOf(object)); - * // => [2, 0] - * - * _.map([['a', '2'], ['c', '0']], _.propertyOf(object)); - * // => [2, 0] - */ - function propertyOf(object) { - return function(path) { - return baseGet(object, toPath(path), path + ''); - }; - } - - /** - * Creates an array of numbers (positive and/or negative) progressing from - * `start` up to, but not including, `end`. If `end` is not specified it is - * set to `start` with `start` then set to `0`. If `end` is less than `start` - * a zero-length range is created unless a negative `step` is specified. - * - * @static - * @memberOf _ - * @category Utility - * @param {number} [start=0] The start of the range. - * @param {number} end The end of the range. - * @param {number} [step=1] The value to increment or decrement by. - * @returns {Array} Returns the new array of numbers. - * @example - * - * _.range(4); - * // => [0, 1, 2, 3] - * - * _.range(1, 5); - * // => [1, 2, 3, 4] - * - * _.range(0, 20, 5); - * // => [0, 5, 10, 15] - * - * _.range(0, -4, -1); - * // => [0, -1, -2, -3] - * - * _.range(1, 4, 0); - * // => [1, 1, 1] - * - * _.range(0); - * // => [] - */ - function range(start, end, step) { - if (step && isIterateeCall(start, end, step)) { - end = step = null; - } - start = +start || 0; - step = step == null ? 1 : (+step || 0); - - if (end == null) { - end = start; - start = 0; - } else { - end = +end || 0; - } - // Use `Array(length)` so engines like Chakra and V8 avoid slower modes. - // See https://youtu.be/XAqIpGU8ZZk#t=17m25s for more details. - var index = -1, - length = nativeMax(ceil((end - start) / (step || 1)), 0), - result = Array(length); - - while (++index < length) { - result[index] = start; - start += step; - } - return result; - } - - /** - * Invokes the iteratee function `n` times, returning an array of the results - * of each invocation. The `iteratee` is bound to `thisArg` and invoked with - * one argument; (index). - * - * @static - * @memberOf _ - * @category Utility - * @param {number} n The number of times to invoke `iteratee`. - * @param {Function} [iteratee=_.identity] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {Array} Returns the array of results. - * @example - * - * var diceRolls = _.times(3, _.partial(_.random, 1, 6, false)); - * // => [3, 6, 4] - * - * _.times(3, function(n) { - * mage.castSpell(n); - * }); - * // => invokes `mage.castSpell(n)` three times with `n` of `0`, `1`, and `2` - * - * _.times(3, function(n) { - * this.cast(n); - * }, mage); - * // => also invokes `mage.castSpell(n)` three times - */ - function times(n, iteratee, thisArg) { - n = floor(n); - - // Exit early to avoid a JSC JIT bug in Safari 8 - // where `Array(0)` is treated as `Array(1)`. - if (n < 1 || !nativeIsFinite(n)) { - return []; - } - var index = -1, - result = Array(nativeMin(n, MAX_ARRAY_LENGTH)); - - iteratee = bindCallback(iteratee, thisArg, 1); - while (++index < n) { - if (index < MAX_ARRAY_LENGTH) { - result[index] = iteratee(index); - } else { - iteratee(index); - } - } - return result; - } - - /** - * Generates a unique ID. If `prefix` is provided the ID is appended to it. - * - * @static - * @memberOf _ - * @category Utility - * @param {string} [prefix] The value to prefix the ID with. - * @returns {string} Returns the unique ID. - * @example - * - * _.uniqueId('contact_'); - * // => 'contact_104' - * - * _.uniqueId(); - * // => '105' - */ - function uniqueId(prefix) { - var id = ++idCounter; - return baseToString(prefix) + id; - } - - /*------------------------------------------------------------------------*/ - - /** - * Adds two numbers. - * - * @static - * @memberOf _ - * @category Math - * @param {number} augend The first number to add. - * @param {number} addend The second number to add. - * @returns {number} Returns the sum. - * @example - * - * _.add(6, 4); - * // => 10 - */ - function add(augend, addend) { - return (+augend || 0) + (+addend || 0); - } - - /** - * Gets the maximum value of `collection`. If `collection` is empty or falsey - * `-Infinity` is returned. If an iteratee function is provided it is invoked - * for each value in `collection` to generate the criterion by which the value - * is ranked. The `iteratee` is bound to `thisArg` and invoked with three - * arguments: (value, index, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Math - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {*} Returns the maximum value. - * @example - * - * _.max([4, 2, 8, 6]); - * // => 8 - * - * _.max([]); - * // => -Infinity - * - * var users = [ - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 40 } - * ]; - * - * _.max(users, function(chr) { - * return chr.age; - * }); - * // => { 'user': 'fred', 'age': 40 } - * - * // using the `_.property` callback shorthand - * _.max(users, 'age'); - * // => { 'user': 'fred', 'age': 40 } - */ - var max = createExtremum(arrayMax); - - /** - * Gets the minimum value of `collection`. If `collection` is empty or falsey - * `Infinity` is returned. If an iteratee function is provided it is invoked - * for each value in `collection` to generate the criterion by which the value - * is ranked. The `iteratee` is bound to `thisArg` and invoked with three - * arguments: (value, index, collection). - * - * If a property name is provided for `iteratee` the created `_.property` - * style callback returns the property value of the given element. - * - * If a value is also provided for `thisArg` the created `_.matchesProperty` - * style callback returns `true` for elements that have a matching property - * value, else `false`. - * - * If an object is provided for `iteratee` the created `_.matches` style - * callback returns `true` for elements that have the properties of the given - * object, else `false`. - * - * @static - * @memberOf _ - * @category Math - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {*} Returns the minimum value. - * @example - * - * _.min([4, 2, 8, 6]); - * // => 2 - * - * _.min([]); - * // => Infinity - * - * var users = [ - * { 'user': 'barney', 'age': 36 }, - * { 'user': 'fred', 'age': 40 } - * ]; - * - * _.min(users, function(chr) { - * return chr.age; - * }); - * // => { 'user': 'barney', 'age': 36 } - * - * // using the `_.property` callback shorthand - * _.min(users, 'age'); - * // => { 'user': 'barney', 'age': 36 } - */ - var min = createExtremum(arrayMin, true); - - /** - * Gets the sum of the values in `collection`. - * - * @static - * @memberOf _ - * @category Math - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [iteratee] The function invoked per iteration. - * @param {*} [thisArg] The `this` binding of `iteratee`. - * @returns {number} Returns the sum. - * @example - * - * _.sum([4, 6]); - * // => 10 - * - * _.sum({ 'a': 4, 'b': 6 }); - * // => 10 - * - * var objects = [ - * { 'n': 4 }, - * { 'n': 6 } - * ]; - * - * _.sum(objects, function(object) { - * return object.n; - * }); - * // => 10 - * - * // using the `_.property` callback shorthand - * _.sum(objects, 'n'); - * // => 10 - */ - function sum(collection, iteratee, thisArg) { - if (thisArg && isIterateeCall(collection, iteratee, thisArg)) { - iteratee = null; - } - var func = getCallback(), - noIteratee = iteratee == null; - - if (!(func === baseCallback && noIteratee)) { - noIteratee = false; - iteratee = func(iteratee, thisArg, 3); - } - return noIteratee - ? arraySum(isArray(collection) ? collection : toIterable(collection)) - : baseSum(collection, iteratee); - } - - /*------------------------------------------------------------------------*/ - - // Ensure wrappers are instances of `baseLodash`. - lodash.prototype = baseLodash.prototype; - - LodashWrapper.prototype = baseCreate(baseLodash.prototype); - LodashWrapper.prototype.constructor = LodashWrapper; - - LazyWrapper.prototype = baseCreate(baseLodash.prototype); - LazyWrapper.prototype.constructor = LazyWrapper; - - // Add functions to the `Map` cache. - MapCache.prototype['delete'] = mapDelete; - MapCache.prototype.get = mapGet; - MapCache.prototype.has = mapHas; - MapCache.prototype.set = mapSet; - - // Add functions to the `Set` cache. - SetCache.prototype.push = cachePush; - - // Assign cache to `_.memoize`. - memoize.Cache = MapCache; - - // Add functions that return wrapped values when chaining. - lodash.after = after; - lodash.ary = ary; - lodash.assign = assign; - lodash.at = at; - lodash.before = before; - lodash.bind = bind; - lodash.bindAll = bindAll; - lodash.bindKey = bindKey; - lodash.callback = callback; - lodash.chain = chain; - lodash.chunk = chunk; - lodash.compact = compact; - lodash.constant = constant; - lodash.countBy = countBy; - lodash.create = create; - lodash.curry = curry; - lodash.curryRight = curryRight; - lodash.debounce = debounce; - lodash.defaults = defaults; - lodash.defer = defer; - lodash.delay = delay; - lodash.difference = difference; - lodash.drop = drop; - lodash.dropRight = dropRight; - lodash.dropRightWhile = dropRightWhile; - lodash.dropWhile = dropWhile; - lodash.fill = fill; - lodash.filter = filter; - lodash.flatten = flatten; - lodash.flattenDeep = flattenDeep; - lodash.flow = flow; - lodash.flowRight = flowRight; - lodash.forEach = forEach; - lodash.forEachRight = forEachRight; - lodash.forIn = forIn; - lodash.forInRight = forInRight; - lodash.forOwn = forOwn; - lodash.forOwnRight = forOwnRight; - lodash.functions = functions; - lodash.groupBy = groupBy; - lodash.indexBy = indexBy; - lodash.initial = initial; - lodash.intersection = intersection; - lodash.invert = invert; - lodash.invoke = invoke; - lodash.keys = keys; - lodash.keysIn = keysIn; - lodash.map = map; - lodash.mapValues = mapValues; - lodash.matches = matches; - lodash.matchesProperty = matchesProperty; - lodash.memoize = memoize; - lodash.merge = merge; - lodash.method = method; - lodash.methodOf = methodOf; - lodash.mixin = mixin; - lodash.negate = negate; - lodash.omit = omit; - lodash.once = once; - lodash.pairs = pairs; - lodash.partial = partial; - lodash.partialRight = partialRight; - lodash.partition = partition; - lodash.pick = pick; - lodash.pluck = pluck; - lodash.property = property; - lodash.propertyOf = propertyOf; - lodash.pull = pull; - lodash.pullAt = pullAt; - lodash.range = range; - lodash.rearg = rearg; - lodash.reject = reject; - lodash.remove = remove; - lodash.rest = rest; - lodash.restParam = restParam; - lodash.set = set; - lodash.shuffle = shuffle; - lodash.slice = slice; - lodash.sortBy = sortBy; - lodash.sortByAll = sortByAll; - lodash.sortByOrder = sortByOrder; - lodash.spread = spread; - lodash.take = take; - lodash.takeRight = takeRight; - lodash.takeRightWhile = takeRightWhile; - lodash.takeWhile = takeWhile; - lodash.tap = tap; - lodash.throttle = throttle; - lodash.thru = thru; - lodash.times = times; - lodash.toArray = toArray; - lodash.toPlainObject = toPlainObject; - lodash.transform = transform; - lodash.union = union; - lodash.uniq = uniq; - lodash.unzip = unzip; - lodash.values = values; - lodash.valuesIn = valuesIn; - lodash.where = where; - lodash.without = without; - lodash.wrap = wrap; - lodash.xor = xor; - lodash.zip = zip; - lodash.zipObject = zipObject; - - // Add aliases. - lodash.backflow = flowRight; - lodash.collect = map; - lodash.compose = flowRight; - lodash.each = forEach; - lodash.eachRight = forEachRight; - lodash.extend = assign; - lodash.iteratee = callback; - lodash.methods = functions; - lodash.object = zipObject; - lodash.select = filter; - lodash.tail = rest; - lodash.unique = uniq; - - // Add functions to `lodash.prototype`. - mixin(lodash, lodash); - - /*------------------------------------------------------------------------*/ - - // Add functions that return unwrapped values when chaining. - lodash.add = add; - lodash.attempt = attempt; - lodash.camelCase = camelCase; - lodash.capitalize = capitalize; - lodash.clone = clone; - lodash.cloneDeep = cloneDeep; - lodash.deburr = deburr; - lodash.endsWith = endsWith; - lodash.escape = escape; - lodash.escapeRegExp = escapeRegExp; - lodash.every = every; - lodash.find = find; - lodash.findIndex = findIndex; - lodash.findKey = findKey; - lodash.findLast = findLast; - lodash.findLastIndex = findLastIndex; - lodash.findLastKey = findLastKey; - lodash.findWhere = findWhere; - lodash.first = first; - lodash.get = get; - lodash.has = has; - lodash.identity = identity; - lodash.includes = includes; - lodash.indexOf = indexOf; - lodash.inRange = inRange; - lodash.isArguments = isArguments; - lodash.isArray = isArray; - lodash.isBoolean = isBoolean; - lodash.isDate = isDate; - lodash.isElement = isElement; - lodash.isEmpty = isEmpty; - lodash.isEqual = isEqual; - lodash.isError = isError; - lodash.isFinite = isFinite; - lodash.isFunction = isFunction; - lodash.isMatch = isMatch; - lodash.isNaN = isNaN; - lodash.isNative = isNative; - lodash.isNull = isNull; - lodash.isNumber = isNumber; - lodash.isObject = isObject; - lodash.isPlainObject = isPlainObject; - lodash.isRegExp = isRegExp; - lodash.isString = isString; - lodash.isTypedArray = isTypedArray; - lodash.isUndefined = isUndefined; - lodash.kebabCase = kebabCase; - lodash.last = last; - lodash.lastIndexOf = lastIndexOf; - lodash.max = max; - lodash.min = min; - lodash.noConflict = noConflict; - lodash.noop = noop; - lodash.now = now; - lodash.pad = pad; - lodash.padLeft = padLeft; - lodash.padRight = padRight; - lodash.parseInt = parseInt; - lodash.random = random; - lodash.reduce = reduce; - lodash.reduceRight = reduceRight; - lodash.repeat = repeat; - lodash.result = result; - lodash.runInContext = runInContext; - lodash.size = size; - lodash.snakeCase = snakeCase; - lodash.some = some; - lodash.sortedIndex = sortedIndex; - lodash.sortedLastIndex = sortedLastIndex; - lodash.startCase = startCase; - lodash.startsWith = startsWith; - lodash.sum = sum; - lodash.template = template; - lodash.trim = trim; - lodash.trimLeft = trimLeft; - lodash.trimRight = trimRight; - lodash.trunc = trunc; - lodash.unescape = unescape; - lodash.uniqueId = uniqueId; - lodash.words = words; - - // Add aliases. - lodash.all = every; - lodash.any = some; - lodash.contains = includes; - lodash.detect = find; - lodash.foldl = reduce; - lodash.foldr = reduceRight; - lodash.head = first; - lodash.include = includes; - lodash.inject = reduce; - - mixin(lodash, (function() { - var source = {}; - baseForOwn(lodash, function(func, methodName) { - if (!lodash.prototype[methodName]) { - source[methodName] = func; - } - }); - return source; - }()), false); - - /*------------------------------------------------------------------------*/ - - // Add functions capable of returning wrapped and unwrapped values when chaining. - lodash.sample = sample; - - lodash.prototype.sample = function(n) { - if (!this.__chain__ && n == null) { - return sample(this.value()); - } - return this.thru(function(value) { - return sample(value, n); - }); - }; - - /*------------------------------------------------------------------------*/ - - /** - * The semantic version number. - * - * @static - * @memberOf _ - * @type string - */ - lodash.VERSION = VERSION; - - // Assign default placeholders. - arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) { - lodash[methodName].placeholder = lodash; - }); - - // Add `LazyWrapper` methods that accept an `iteratee` value. - arrayEach(['dropWhile', 'filter', 'map', 'takeWhile'], function(methodName, type) { - var isFilter = type != LAZY_MAP_FLAG, - isDropWhile = type == LAZY_DROP_WHILE_FLAG; - - LazyWrapper.prototype[methodName] = function(iteratee, thisArg) { - var filtered = this.__filtered__, - result = (filtered && isDropWhile) ? new LazyWrapper(this) : this.clone(), - iteratees = result.__iteratees__ || (result.__iteratees__ = []); - - iteratees.push({ - 'done': false, - 'count': 0, - 'index': 0, - 'iteratee': getCallback(iteratee, thisArg, 1), - 'limit': -1, - 'type': type - }); - - result.__filtered__ = filtered || isFilter; - return result; - }; - }); - - // Add `LazyWrapper` methods for `_.drop` and `_.take` variants. - arrayEach(['drop', 'take'], function(methodName, index) { - var whileName = methodName + 'While'; - - LazyWrapper.prototype[methodName] = function(n) { - var filtered = this.__filtered__, - result = (filtered && !index) ? this.dropWhile() : this.clone(); - - n = n == null ? 1 : nativeMax(floor(n) || 0, 0); - if (filtered) { - if (index) { - result.__takeCount__ = nativeMin(result.__takeCount__, n); - } else { - last(result.__iteratees__).limit = n; - } - } else { - var views = result.__views__ || (result.__views__ = []); - views.push({ 'size': n, 'type': methodName + (result.__dir__ < 0 ? 'Right' : '') }); - } - return result; - }; - - LazyWrapper.prototype[methodName + 'Right'] = function(n) { - return this.reverse()[methodName](n).reverse(); - }; - - LazyWrapper.prototype[methodName + 'RightWhile'] = function(predicate, thisArg) { - return this.reverse()[whileName](predicate, thisArg).reverse(); - }; - }); - - // Add `LazyWrapper` methods for `_.first` and `_.last`. - arrayEach(['first', 'last'], function(methodName, index) { - var takeName = 'take' + (index ? 'Right' : ''); - - LazyWrapper.prototype[methodName] = function() { - return this[takeName](1).value()[0]; - }; - }); - - // Add `LazyWrapper` methods for `_.initial` and `_.rest`. - arrayEach(['initial', 'rest'], function(methodName, index) { - var dropName = 'drop' + (index ? '' : 'Right'); - - LazyWrapper.prototype[methodName] = function() { - return this[dropName](1); - }; - }); - - // Add `LazyWrapper` methods for `_.pluck` and `_.where`. - arrayEach(['pluck', 'where'], function(methodName, index) { - var operationName = index ? 'filter' : 'map', - createCallback = index ? baseMatches : property; - - LazyWrapper.prototype[methodName] = function(value) { - return this[operationName](createCallback(value)); - }; - }); - - LazyWrapper.prototype.compact = function() { - return this.filter(identity); - }; - - LazyWrapper.prototype.reject = function(predicate, thisArg) { - predicate = getCallback(predicate, thisArg, 1); - return this.filter(function(value) { - return !predicate(value); - }); - }; - - LazyWrapper.prototype.slice = function(start, end) { - start = start == null ? 0 : (+start || 0); - var result = start < 0 ? this.takeRight(-start) : this.drop(start); - - if (end !== undefined) { - end = (+end || 0); - result = end < 0 ? result.dropRight(-end) : result.take(end - start); - } - return result; - }; - - LazyWrapper.prototype.toArray = function() { - return this.drop(0); - }; - - // Add `LazyWrapper` methods to `lodash.prototype`. - baseForOwn(LazyWrapper.prototype, function(func, methodName) { - var lodashFunc = lodash[methodName]; - if (!lodashFunc) { - return; - } - var checkIteratee = /^(?:filter|map|reject)|While$/.test(methodName), - retUnwrapped = /^(?:first|last)$/.test(methodName); - - lodash.prototype[methodName] = function() { - var args = arguments, - length = args.length, - chainAll = this.__chain__, - value = this.__wrapped__, - isHybrid = !!this.__actions__.length, - isLazy = value instanceof LazyWrapper, - iteratee = args[0], - useLazy = isLazy || isArray(value); - - if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) { - // avoid lazy use if the iteratee has a "length" value other than `1` - isLazy = useLazy = false; - } - var onlyLazy = isLazy && !isHybrid; - if (retUnwrapped && !chainAll) { - return onlyLazy - ? func.call(value) - : lodashFunc.call(lodash, this.value()); - } - var interceptor = function(value) { - var otherArgs = [value]; - push.apply(otherArgs, args); - return lodashFunc.apply(lodash, otherArgs); - }; - if (useLazy) { - var wrapper = onlyLazy ? value : new LazyWrapper(this), - result = func.apply(wrapper, args); - - if (!retUnwrapped && (isHybrid || result.__actions__)) { - var actions = result.__actions__ || (result.__actions__ = []); - actions.push({ 'func': thru, 'args': [interceptor], 'thisArg': lodash }); - } - return new LodashWrapper(result, chainAll); - } - return this.thru(interceptor); - }; - }); - - // Add `Array` and `String` methods to `lodash.prototype`. - arrayEach(['concat', 'join', 'pop', 'push', 'replace', 'shift', 'sort', 'splice', 'split', 'unshift'], function(methodName) { - var func = (/^(?:replace|split)$/.test(methodName) ? stringProto : arrayProto)[methodName], - chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru', - retUnwrapped = /^(?:join|pop|replace|shift)$/.test(methodName); - - lodash.prototype[methodName] = function() { - var args = arguments; - if (retUnwrapped && !this.__chain__) { - return func.apply(this.value(), args); - } - return this[chainName](function(value) { - return func.apply(value, args); - }); - }; - }); - - // Map minified function names to their real names. - baseForOwn(LazyWrapper.prototype, function(func, methodName) { - var lodashFunc = lodash[methodName]; - if (lodashFunc) { - var key = lodashFunc.name, - names = realNames[key] || (realNames[key] = []); - - names.push({ 'name': methodName, 'func': lodashFunc }); - } - }); - - realNames[createHybridWrapper(null, BIND_KEY_FLAG).name] = [{ 'name': 'wrapper', 'func': null }]; - - // Add functions to the lazy wrapper. - LazyWrapper.prototype.clone = lazyClone; - LazyWrapper.prototype.reverse = lazyReverse; - LazyWrapper.prototype.value = lazyValue; - - // Add chaining functions to the `lodash` wrapper. - lodash.prototype.chain = wrapperChain; - lodash.prototype.commit = wrapperCommit; - lodash.prototype.plant = wrapperPlant; - lodash.prototype.reverse = wrapperReverse; - lodash.prototype.toString = wrapperToString; - lodash.prototype.run = lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue; - - // Add function aliases to the `lodash` wrapper. - lodash.prototype.collect = lodash.prototype.map; - lodash.prototype.head = lodash.prototype.first; - lodash.prototype.select = lodash.prototype.filter; - lodash.prototype.tail = lodash.prototype.rest; - - return lodash; - } - - /*--------------------------------------------------------------------------*/ - - // Export lodash. - var _ = runInContext(); - - // Some AMD build optimizers like r.js check for condition patterns like the following: - if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) { - // Expose lodash to the global object when an AMD loader is present to avoid - // errors in cases where lodash is loaded by a script tag and not intended - // as an AMD module. See http://requirejs.org/docs/errors.html#mismatch for - // more details. - root._ = _; - - // Define as an anonymous module so, through path mapping, it can be - // referenced as the "underscore" module. - define(function() { - return _; - }); - } - // Check for `exports` after `define` in case a build optimizer adds an `exports` object. - else if (freeExports && freeModule) { - // Export for Node.js or RingoJS. - if (moduleExports) { - (freeModule.exports = _)._ = _; - } - // Export for Narwhal or Rhino -require. - else { - freeExports._ = _; - } - } - else { - // Export for a browser or Rhino. - root._ = _; - } -}.call(this)); - -}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {}) -},{}],13:[function(require,module,exports){ -/* - * Lexical analysis and token construction. - */ - -"use strict"; - -var _ = require("lodash"); -var events = require("events"); -var reg = require("./reg.js"); -var state = require("./state.js").state; - -var unicodeData = require("../data/ascii-identifier-data.js"); -var asciiIdentifierStartTable = unicodeData.asciiIdentifierStartTable; -var asciiIdentifierPartTable = unicodeData.asciiIdentifierPartTable; -var nonAsciiIdentifierStartTable = require("../data/non-ascii-identifier-start.js"); -var nonAsciiIdentifierPartTable = require("../data/non-ascii-identifier-part-only.js"); - -// Some of these token types are from JavaScript Parser API -// while others are specific to JSHint parser. -// JS Parser API: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API - -var Token = { - Identifier: 1, - Punctuator: 2, - NumericLiteral: 3, - StringLiteral: 4, - Comment: 5, - Keyword: 6, - NullLiteral: 7, - BooleanLiteral: 8, - RegExp: 9, - TemplateHead: 10, - TemplateMiddle: 11, - TemplateTail: 12, - NoSubstTemplate: 13 -}; - -var Context = { - Block: 1, - Template: 2 -}; - -function isHex(str) { - return /^[0-9a-fA-F]+$/.test(str); -} - -function isHexDigit(str) { - return str.length === 1 && isHex(str); -} - -// Object that handles postponed lexing verifications that checks the parsed -// environment state. - -function asyncTrigger() { - var _checks = []; - - return { - push: function(fn) { - _checks.push(fn); - }, - - check: function() { - for (var check = 0; check < _checks.length; ++check) { - _checks[check](); - } - - _checks.splice(0, _checks.length); - } - }; -} - -/* - * Lexer for JSHint. - * - * This object does a char-by-char scan of the provided source code - * and produces a sequence of tokens. - * - * var lex = new Lexer("var i = 0;"); - * lex.start(); - * lex.token(); // returns the next token - * - * You have to use the token() method to move the lexer forward - * but you don't have to use its return value to get tokens. In addition - * to token() method returning the next token, the Lexer object also - * emits events. - * - * lex.on("Identifier", function(data) { - * if (data.name.indexOf("_") >= 0) { - * // Produce a warning. - * } - * }); - * - * Note that the token() method returns tokens in a JSLint-compatible - * format while the event emitter uses a slightly modified version of - * Mozilla's JavaScript Parser API. Eventually, we will move away from - * JSLint format. - */ -function Lexer(source) { - var lines = source; - - if (typeof lines === "string") { - lines = lines - .replace(/\r\n/g, "\n") - .replace(/\r/g, "\n") - .split("\n"); - } - - // If the first line is a shebang (#!), make it a blank and move on. - // Shebangs are used by Node scripts. - - if (lines[0] && lines[0].substr(0, 2) === "#!") { - if (lines[0].indexOf("node") !== -1) { - state.option.node = true; - } - lines[0] = ""; - } - - this.emitter = new events.EventEmitter(); - this.source = source; - this.setLines(lines); - this.prereg = true; - - this.line = 0; - this.char = 1; - this.from = 1; - this.input = ""; - this.inComment = false; - this.context = []; - this.templateStarts = []; - - for (var i = 0; i < state.option.indent; i += 1) { - state.tab += " "; - } -} - -Lexer.prototype = { - _lines: [], - - inContext: function(ctxType) { - return this.context.length > 0 && this.context[this.context.length - 1].type === ctxType; - }, - - pushContext: function(ctxType) { - this.context.push({ type: ctxType }); - }, - - popContext: function() { - return this.context.pop(); - }, - - isContext: function(context) { - return this.context.length > 0 && this.context[this.context.length - 1] === context; - }, - - currentContext: function() { - return this.context.length > 0 && this.context[this.context.length - 1]; - }, - - getLines: function() { - this._lines = state.lines; - return this._lines; - }, - - setLines: function(val) { - this._lines = val; - state.lines = this._lines; - }, - - /* - * Return the next i character without actually moving the - * char pointer. - */ - peek: function(i) { - return this.input.charAt(i || 0); - }, - - /* - * Move the char pointer forward i times. - */ - skip: function(i) { - i = i || 1; - this.char += i; - this.input = this.input.slice(i); - }, - - /* - * Subscribe to a token event. The API for this method is similar - * Underscore.js i.e. you can subscribe to multiple events with - * one call: - * - * lex.on("Identifier Number", function(data) { - * // ... - * }); - */ - on: function(names, listener) { - names.split(" ").forEach(function(name) { - this.emitter.on(name, listener); - }.bind(this)); - }, - - /* - * Trigger a token event. All arguments will be passed to each - * listener. - */ - trigger: function() { - this.emitter.emit.apply(this.emitter, Array.prototype.slice.call(arguments)); - }, - - /* - * Postpone a token event. the checking condition is set as - * last parameter, and the trigger function is called in a - * stored callback. To be later called using the check() function - * by the parser. This avoids parser's peek() to give the lexer - * a false context. - */ - triggerAsync: function(type, args, checks, fn) { - checks.push(function() { - if (fn()) { - this.trigger(type, args); - } - }.bind(this)); - }, - - /* - * Extract a punctuator out of the next sequence of characters - * or return 'null' if its not possible. - * - * This method's implementation was heavily influenced by the - * scanPunctuator function in the Esprima parser's source code. - */ - scanPunctuator: function() { - var ch1 = this.peek(); - var ch2, ch3, ch4; - - switch (ch1) { - // Most common single-character punctuators - case ".": - if ((/^[0-9]$/).test(this.peek(1))) { - return null; - } - if (this.peek(1) === "." && this.peek(2) === ".") { - return { - type: Token.Punctuator, - value: "..." - }; - } - /* falls through */ - case "(": - case ")": - case ";": - case ",": - case "[": - case "]": - case ":": - case "~": - case "?": - return { - type: Token.Punctuator, - value: ch1 - }; - - // A block/object opener - case "{": - this.pushContext(Context.Block); - return { - type: Token.Punctuator, - value: ch1 - }; - - // A block/object closer - case "}": - if (this.inContext(Context.Block)) { - this.popContext(); - } - return { - type: Token.Punctuator, - value: ch1 - }; - - // A pound sign (for Node shebangs) - case "#": - return { - type: Token.Punctuator, - value: ch1 - }; - - // We're at the end of input - case "": - return null; - } - - // Peek more characters - - ch2 = this.peek(1); - ch3 = this.peek(2); - ch4 = this.peek(3); - - // 4-character punctuator: >>>= - - if (ch1 === ">" && ch2 === ">" && ch3 === ">" && ch4 === "=") { - return { - type: Token.Punctuator, - value: ">>>=" - }; - } - - // 3-character punctuators: === !== >>> <<= >>= - - if (ch1 === "=" && ch2 === "=" && ch3 === "=") { - return { - type: Token.Punctuator, - value: "===" - }; - } - - if (ch1 === "!" && ch2 === "=" && ch3 === "=") { - return { - type: Token.Punctuator, - value: "!==" - }; - } - - if (ch1 === ">" && ch2 === ">" && ch3 === ">") { - return { - type: Token.Punctuator, - value: ">>>" - }; - } - - if (ch1 === "<" && ch2 === "<" && ch3 === "=") { - return { - type: Token.Punctuator, - value: "<<=" - }; - } - - if (ch1 === ">" && ch2 === ">" && ch3 === "=") { - return { - type: Token.Punctuator, - value: ">>=" - }; - } - - // Fat arrow punctuator - if (ch1 === "=" && ch2 === ">") { - return { - type: Token.Punctuator, - value: ch1 + ch2 - }; - } - - // 2-character punctuators: <= >= == != ++ -- << >> && || - // += -= *= %= &= |= ^= /= - if (ch1 === ch2 && ("+-<>&|".indexOf(ch1) >= 0)) { - return { - type: Token.Punctuator, - value: ch1 + ch2 - }; - } - - if ("<>=!+-*%&|^/".indexOf(ch1) >= 0) { - if (ch2 === "=") { - return { - type: Token.Punctuator, - value: ch1 + ch2 - }; - } - - return { - type: Token.Punctuator, - value: ch1 - }; - } - - return null; - }, - - /* - * Extract a comment out of the next sequence of characters and/or - * lines or return 'null' if its not possible. Since comments can - * span across multiple lines this method has to move the char - * pointer. - * - * In addition to normal JavaScript comments (// and /*) this method - * also recognizes JSHint- and JSLint-specific comments such as - * /*jshint, /*jslint, /*globals and so on. - */ - scanComments: function(checks) { - var ch1 = this.peek(); - var ch2 = this.peek(1); - var rest = this.input.substr(2); - var startLine = this.line; - var startChar = this.char; - var self = this; - - // Create a comment token object and make sure it - // has all the data JSHint needs to work with special - // comments. - - function commentToken(label, body, opt) { - var special = ["jshint", "jslint", "members", "member", "globals", "global", "exported"]; - var isSpecial = false; - var value = label + body; - var commentType = "plain"; - opt = opt || {}; - - if (opt.isMultiline) { - value += "*/"; - } - - body = body.replace(/\n/g, " "); - - if (label === "/*" && reg.fallsThrough.test(body)) { - isSpecial = true; - commentType = "falls through"; - } - - special.forEach(function(str) { - if (isSpecial) { - return; - } - - // Don't recognize any special comments other than jshint for single-line - // comments. This introduced many problems with legit comments. - if (label === "//" && str !== "jshint") { - return; - } - - if (body.charAt(str.length) === " " && body.substr(0, str.length) === str) { - isSpecial = true; - label = label + str; - body = body.substr(str.length); - } - - if (!isSpecial && body.charAt(0) === " " && body.charAt(str.length + 1) === " " && - body.substr(1, str.length) === str) { - isSpecial = true; - label = label + " " + str; - body = body.substr(str.length + 1); - } - - if (!isSpecial) { - return; - } - - switch (str) { - case "member": - commentType = "members"; - break; - case "global": - commentType = "globals"; - break; - default: - var options = body.split(":").map(function(v) { - return v.replace(/^\s+/, "").replace(/\s+$/, ""); - }); - - if (options.length === 2) { - switch (options[0]) { - case "ignore": - switch (options[1]) { - case "start": - self.ignoringLinterErrors = true; - isSpecial = false; - break; - case "end": - self.ignoringLinterErrors = false; - isSpecial = false; - break; - } - } - } - - commentType = str; - } - }); - - return { - type: Token.Comment, - commentType: commentType, - value: value, - body: body, - isSpecial: isSpecial, - isMultiline: opt.isMultiline || false, - isMalformed: opt.isMalformed || false - }; - } - - // End of unbegun comment. Raise an error and skip that input. - if (ch1 === "*" && ch2 === "/") { - this.trigger("error", { - code: "E018", - line: startLine, - character: startChar - }); - - this.skip(2); - return null; - } - - // Comments must start either with // or /* - if (ch1 !== "/" || (ch2 !== "*" && ch2 !== "/")) { - return null; - } - - // One-line comment - if (ch2 === "/") { - this.skip(this.input.length); // Skip to the EOL. - return commentToken("//", rest); - } - - var body = ""; - - /* Multi-line comment */ - if (ch2 === "*") { - this.inComment = true; - this.skip(2); - - while (this.peek() !== "*" || this.peek(1) !== "/") { - if (this.peek() === "") { // End of Line - body += "\n"; - - // If we hit EOF and our comment is still unclosed, - // trigger an error and end the comment implicitly. - if (!this.nextLine(checks)) { - this.trigger("error", { - code: "E017", - line: startLine, - character: startChar - }); - - this.inComment = false; - return commentToken("/*", body, { - isMultiline: true, - isMalformed: true - }); - } - } else { - body += this.peek(); - this.skip(); - } - } - - this.skip(2); - this.inComment = false; - return commentToken("/*", body, { isMultiline: true }); - } - }, - - /* - * Extract a keyword out of the next sequence of characters or - * return 'null' if its not possible. - */ - scanKeyword: function() { - var result = /^[a-zA-Z_$][a-zA-Z0-9_$]*/.exec(this.input); - var keywords = [ - "if", "in", "do", "var", "for", "new", - "try", "let", "this", "else", "case", - "void", "with", "enum", "while", "break", - "catch", "throw", "const", "yield", "class", - "super", "return", "typeof", "delete", - "switch", "export", "import", "default", - "finally", "extends", "function", "continue", - "debugger", "instanceof" - ]; - - if (result && keywords.indexOf(result[0]) >= 0) { - return { - type: Token.Keyword, - value: result[0] - }; - } - - return null; - }, - - /* - * Extract a JavaScript identifier out of the next sequence of - * characters or return 'null' if its not possible. In addition, - * to Identifier this method can also produce BooleanLiteral - * (true/false) and NullLiteral (null). - */ - scanIdentifier: function() { - var id = ""; - var index = 0; - var type, char; - - function isNonAsciiIdentifierStart(code) { - return nonAsciiIdentifierStartTable.indexOf(code) > -1; - } - - function isNonAsciiIdentifierPart(code) { - return isNonAsciiIdentifierStart(code) || nonAsciiIdentifierPartTable.indexOf(code) > -1; - } - - var readUnicodeEscapeSequence = function() { - /*jshint validthis:true */ - index += 1; - - if (this.peek(index) !== "u") { - return null; - } - - var sequence = this.peek(index + 1) + this.peek(index + 2) + - this.peek(index + 3) + this.peek(index + 4); - var code; - - if (isHex(sequence)) { - code = parseInt(sequence, 16); - - if (asciiIdentifierPartTable[code] || isNonAsciiIdentifierPart(code)) { - index += 5; - return "\\u" + sequence; - } - - return null; - } - - return null; - }.bind(this); - - var getIdentifierStart = function() { - /*jshint validthis:true */ - var chr = this.peek(index); - var code = chr.charCodeAt(0); - - if (code === 92) { - return readUnicodeEscapeSequence(); - } - - if (code < 128) { - if (asciiIdentifierStartTable[code]) { - index += 1; - return chr; - } - - return null; - } - - if (isNonAsciiIdentifierStart(code)) { - index += 1; - return chr; - } - - return null; - }.bind(this); - - var getIdentifierPart = function() { - /*jshint validthis:true */ - var chr = this.peek(index); - var code = chr.charCodeAt(0); - - if (code === 92) { - return readUnicodeEscapeSequence(); - } - - if (code < 128) { - if (asciiIdentifierPartTable[code]) { - index += 1; - return chr; - } - - return null; - } - - if (isNonAsciiIdentifierPart(code)) { - index += 1; - return chr; - } - - return null; - }.bind(this); - - function removeEscapeSequences(id) { - return id.replace(/\\u([0-9a-fA-F]{4})/g, function(m0, codepoint) { - return String.fromCharCode(parseInt(codepoint, 16)); - }); - } - - char = getIdentifierStart(); - if (char === null) { - return null; - } - - id = char; - for (;;) { - char = getIdentifierPart(); - - if (char === null) { - break; - } - - id += char; - } - - switch (id) { - case "true": - case "false": - type = Token.BooleanLiteral; - break; - case "null": - type = Token.NullLiteral; - break; - default: - type = Token.Identifier; - } - - return { - type: type, - value: removeEscapeSequences(id), - text: id, - tokenLength: id.length - }; - }, - - /* - * Extract a numeric literal out of the next sequence of - * characters or return 'null' if its not possible. This method - * supports all numeric literals described in section 7.8.3 - * of the EcmaScript 5 specification. - * - * This method's implementation was heavily influenced by the - * scanNumericLiteral function in the Esprima parser's source code. - */ - scanNumericLiteral: function(checks) { - var index = 0; - var value = ""; - var length = this.input.length; - var char = this.peek(index); - var bad; - var isAllowedDigit = isDecimalDigit; - var base = 10; - var isLegacy = false; - - function isDecimalDigit(str) { - return (/^[0-9]$/).test(str); - } - - function isOctalDigit(str) { - return (/^[0-7]$/).test(str); - } - - function isBinaryDigit(str) { - return (/^[01]$/).test(str); - } - - function isIdentifierStart(ch) { - return (ch === "$") || (ch === "_") || (ch === "\\") || - (ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z"); - } - - // Numbers must start either with a decimal digit or a point. - - if (char !== "." && !isDecimalDigit(char)) { - return null; - } - - if (char !== ".") { - value = this.peek(index); - index += 1; - char = this.peek(index); - - if (value === "0") { - // Base-16 numbers. - if (char === "x" || char === "X") { - isAllowedDigit = isHexDigit; - base = 16; - - index += 1; - value += char; - } - - // Base-8 numbers. - if (char === "o" || char === "O") { - isAllowedDigit = isOctalDigit; - base = 8; - - if (!state.inES6(true)) { - this.triggerAsync( - "warning", - { - code: "W119", - line: this.line, - character: this.char, - data: [ "Octal integer literal", "6" ] - }, - checks, - function() { return true; } - ); - } - - index += 1; - value += char; - } - - // Base-2 numbers. - if (char === "b" || char === "B") { - isAllowedDigit = isBinaryDigit; - base = 2; - - if (!state.inES6(true)) { - this.triggerAsync( - "warning", - { - code: "W119", - line: this.line, - character: this.char, - data: [ "Binary integer literal", "6" ] - }, - checks, - function() { return true; } - ); - } - - index += 1; - value += char; - } - - // Legacy base-8 numbers. - if (isOctalDigit(char)) { - isAllowedDigit = isOctalDigit; - base = 8; - isLegacy = true; - bad = false; - - index += 1; - value += char; - } - - // Decimal numbers that start with '0' such as '09' are illegal - // but we still parse them and return as malformed. - - if (!isOctalDigit(char) && isDecimalDigit(char)) { - index += 1; - value += char; - } - } - - while (index < length) { - char = this.peek(index); - - if (isLegacy && isDecimalDigit(char)) { - // Numbers like '019' (note the 9) are not valid octals - // but we still parse them and mark as malformed. - bad = true; - } else if (!isAllowedDigit(char)) { - break; - } - value += char; - index += 1; - } - - if (isAllowedDigit !== isDecimalDigit) { - if (!isLegacy && value.length <= 2) { // 0x - return { - type: Token.NumericLiteral, - value: value, - isMalformed: true - }; - } - - if (index < length) { - char = this.peek(index); - if (isIdentifierStart(char)) { - return null; - } - } - - return { - type: Token.NumericLiteral, - value: value, - base: base, - isLegacy: isLegacy, - isMalformed: false - }; - } - } - - // Decimal digits. - - if (char === ".") { - value += char; - index += 1; - - while (index < length) { - char = this.peek(index); - if (!isDecimalDigit(char)) { - break; - } - value += char; - index += 1; - } - } - - // Exponent part. - - if (char === "e" || char === "E") { - value += char; - index += 1; - char = this.peek(index); - - if (char === "+" || char === "-") { - value += this.peek(index); - index += 1; - } - - char = this.peek(index); - if (isDecimalDigit(char)) { - value += char; - index += 1; - - while (index < length) { - char = this.peek(index); - if (!isDecimalDigit(char)) { - break; - } - value += char; - index += 1; - } - } else { - return null; - } - } - - if (index < length) { - char = this.peek(index); - if (isIdentifierStart(char)) { - return null; - } - } - - return { - type: Token.NumericLiteral, - value: value, - base: base, - isMalformed: !isFinite(value) - }; - }, - - - // Assumes previously parsed character was \ (=== '\\') and was not skipped. - scanEscapeSequence: function(checks) { - var allowNewLine = false; - var jump = 1; - this.skip(); - var char = this.peek(); - - switch (char) { - case "'": - this.triggerAsync("warning", { - code: "W114", - line: this.line, - character: this.char, - data: [ "\\'" ] - }, checks, function() {return state.jsonMode; }); - break; - case "b": - char = "\\b"; - break; - case "f": - char = "\\f"; - break; - case "n": - char = "\\n"; - break; - case "r": - char = "\\r"; - break; - case "t": - char = "\\t"; - break; - case "0": - char = "\\0"; - - // Octal literals fail in strict mode. - // Check if the number is between 00 and 07. - var n = parseInt(this.peek(1), 10); - this.triggerAsync("warning", { - code: "W115", - line: this.line, - character: this.char - }, checks, - function() { return n >= 0 && n <= 7 && state.isStrict(); }); - break; - case "1": - case "2": - case "3": - case "4": - case "5": - case "6": - case "7": - char = "\\" + char; - this.triggerAsync("warning", { - code: "W115", - line: this.line, - character: this.char - }, checks, - function() { return state.isStrict(); }); - break; - case "u": - var sequence = this.input.substr(1, 4); - var code = parseInt(sequence, 16); - if (!isHex(sequence)) { - // This condition unequivocally describes a syntax error. - // TODO: Re-factor as an "error" (not a "warning"). - this.trigger("warning", { - code: "W052", - line: this.line, - character: this.char, - data: [ "u" + sequence ] - }); - } - char = String.fromCharCode(code); - jump = 5; - break; - case "v": - this.triggerAsync("warning", { - code: "W114", - line: this.line, - character: this.char, - data: [ "\\v" ] - }, checks, function() { return state.jsonMode; }); - - char = "\v"; - break; - case "x": - var x = parseInt(this.input.substr(1, 2), 16); - - this.triggerAsync("warning", { - code: "W114", - line: this.line, - character: this.char, - data: [ "\\x-" ] - }, checks, function() { return state.jsonMode; }); - - char = String.fromCharCode(x); - jump = 3; - break; - case "\\": - char = "\\\\"; - break; - case "\"": - char = "\\\""; - break; - case "/": - break; - case "": - allowNewLine = true; - char = ""; - break; - } - - return { char: char, jump: jump, allowNewLine: allowNewLine }; - }, - - /* - * Extract a template literal out of the next sequence of characters - * and/or lines or return 'null' if its not possible. Since template - * literals can span across multiple lines, this method has to move - * the char pointer. - */ - scanTemplateLiteral: function(checks) { - var tokenType; - var value = ""; - var ch; - var startLine = this.line; - var startChar = this.char; - var depth = this.templateStarts.length; - - if (this.peek() === "`") { - if (!state.inES6(true)) { - this.triggerAsync( - "warning", - { - code: "W119", - line: this.line, - character: this.char, - data: ["template literal syntax", "6"] - }, - checks, - function() { return true; } - ); - } - // Template must start with a backtick. - tokenType = Token.TemplateHead; - this.templateStarts.push({ line: this.line, char: this.char }); - depth = this.templateStarts.length; - this.skip(1); - this.pushContext(Context.Template); - } else if (this.inContext(Context.Template) && this.peek() === "}") { - // If we're in a template context, and we have a '}', lex a TemplateMiddle. - tokenType = Token.TemplateMiddle; - } else { - // Go lex something else. - return null; - } - - while (this.peek() !== "`") { - while ((ch = this.peek()) === "") { - value += "\n"; - if (!this.nextLine(checks)) { - // Unclosed template literal --- point to the starting "`" - var startPos = this.templateStarts.pop(); - this.trigger("error", { - code: "E052", - line: startPos.line, - character: startPos.char - }); - return { - type: tokenType, - value: value, - startLine: startLine, - startChar: startChar, - isUnclosed: true, - depth: depth, - context: this.popContext() - }; - } - } - - if (ch === '$' && this.peek(1) === '{') { - value += '${'; - this.skip(2); - return { - type: tokenType, - value: value, - startLine: startLine, - startChar: startChar, - isUnclosed: false, - depth: depth, - context: this.currentContext() - }; - } else if (ch === '\\') { - var escape = this.scanEscapeSequence(checks); - value += escape.char; - this.skip(escape.jump); - } else if (ch !== '`') { - // Otherwise, append the value and continue. - value += ch; - this.skip(1); - } - } - - // Final value is either NoSubstTemplate or TemplateTail - tokenType = tokenType === Token.TemplateHead ? Token.NoSubstTemplate : Token.TemplateTail; - this.skip(1); - this.templateStarts.pop(); - - return { - type: tokenType, - value: value, - startLine: startLine, - startChar: startChar, - isUnclosed: false, - depth: depth, - context: this.popContext() - }; - }, - - /* - * Extract a string out of the next sequence of characters and/or - * lines or return 'null' if its not possible. Since strings can - * span across multiple lines this method has to move the char - * pointer. - * - * This method recognizes pseudo-multiline JavaScript strings: - * - * var str = "hello\ - * world"; - */ - scanStringLiteral: function(checks) { - /*jshint loopfunc:true */ - var quote = this.peek(); - - // String must start with a quote. - if (quote !== "\"" && quote !== "'") { - return null; - } - - // In JSON strings must always use double quotes. - this.triggerAsync("warning", { - code: "W108", - line: this.line, - character: this.char // +1? - }, checks, function() { return state.jsonMode && quote !== "\""; }); - - var value = ""; - var startLine = this.line; - var startChar = this.char; - var allowNewLine = false; - - this.skip(); - - while (this.peek() !== quote) { - if (this.peek() === "") { // End Of Line - - // If an EOL is not preceded by a backslash, show a warning - // and proceed like it was a legit multi-line string where - // author simply forgot to escape the newline symbol. - // - // Another approach is to implicitly close a string on EOL - // but it generates too many false positives. - - if (!allowNewLine) { - // This condition unequivocally describes a syntax error. - // TODO: Re-factor as an "error" (not a "warning"). - this.trigger("warning", { - code: "W112", - line: this.line, - character: this.char - }); - } else { - allowNewLine = false; - - // Otherwise show a warning if multistr option was not set. - // For JSON, show warning no matter what. - - this.triggerAsync("warning", { - code: "W043", - line: this.line, - character: this.char - }, checks, function() { return !state.option.multistr; }); - - this.triggerAsync("warning", { - code: "W042", - line: this.line, - character: this.char - }, checks, function() { return state.jsonMode && state.option.multistr; }); - } - - // If we get an EOF inside of an unclosed string, show an - // error and implicitly close it at the EOF point. - - if (!this.nextLine(checks)) { - this.trigger("error", { - code: "E029", - line: startLine, - character: startChar - }); - - return { - type: Token.StringLiteral, - value: value, - startLine: startLine, - startChar: startChar, - isUnclosed: true, - quote: quote - }; - } - - } else { // Any character other than End Of Line - - allowNewLine = false; - var char = this.peek(); - var jump = 1; // A length of a jump, after we're done - // parsing this character. - - if (char < " ") { - // Warn about a control character in a string. - this.triggerAsync( - "warning", - { - code: "W113", - line: this.line, - character: this.char, - data: [ "<non-printable>" ] - }, - checks, - function() { return true; } - ); - } - - // Special treatment for some escaped characters. - if (char === "\\") { - var parsed = this.scanEscapeSequence(checks); - char = parsed.char; - jump = parsed.jump; - allowNewLine = parsed.allowNewLine; - } - - value += char; - this.skip(jump); - } - } - - this.skip(); - return { - type: Token.StringLiteral, - value: value, - startLine: startLine, - startChar: startChar, - isUnclosed: false, - quote: quote - }; - }, - - /* - * Extract a regular expression out of the next sequence of - * characters and/or lines or return 'null' if its not possible. - * - * This method is platform dependent: it accepts almost any - * regular expression values but then tries to compile and run - * them using system's RegExp object. This means that there are - * rare edge cases where one JavaScript engine complains about - * your regular expression while others don't. - */ - scanRegExp: function(checks) { - var index = 0; - var length = this.input.length; - var char = this.peek(); - var value = char; - var body = ""; - var flags = []; - var malformed = false; - var isCharSet = false; - var terminated, malformedDesc; - - var scanUnexpectedChars = function() { - // Unexpected control character - if (char < " ") { - malformed = true; - this.triggerAsync( - "warning", - { - code: "W048", - line: this.line, - character: this.char - }, - checks, - function() { return true; } - ); - } - - // Unexpected escaped character - if (char === "<") { - malformed = true; - this.triggerAsync( - "warning", - { - code: "W049", - line: this.line, - character: this.char, - data: [ char ] - }, - checks, - function() { return true; } - ); - } - }.bind(this); - - // Regular expressions must start with '/' - if (!this.prereg || char !== "/") { - return null; - } - - index += 1; - terminated = false; - - // Try to get everything in between slashes. A couple of - // cases aside (see scanUnexpectedChars) we don't really - // care whether the resulting expression is valid or not. - // We will check that later using the RegExp object. - - while (index < length) { - char = this.peek(index); - value += char; - body += char; - - if (isCharSet) { - if (char === "]") { - if (this.peek(index - 1) !== "\\" || this.peek(index - 2) === "\\") { - isCharSet = false; - } - } - - if (char === "\\") { - index += 1; - char = this.peek(index); - body += char; - value += char; - - scanUnexpectedChars(); - } - - index += 1; - continue; - } - - if (char === "\\") { - index += 1; - char = this.peek(index); - body += char; - value += char; - - scanUnexpectedChars(); - - if (char === "/") { - index += 1; - continue; - } - - if (char === "[") { - index += 1; - continue; - } - } - - if (char === "[") { - isCharSet = true; - index += 1; - continue; - } - - if (char === "/") { - body = body.substr(0, body.length - 1); - terminated = true; - index += 1; - break; - } - - index += 1; - } - - // A regular expression that was never closed is an - // error from which we cannot recover. - - if (!terminated) { - this.trigger("error", { - code: "E015", - line: this.line, - character: this.from - }); - - return void this.trigger("fatal", { - line: this.line, - from: this.from - }); - } - - // Parse flags (if any). - - while (index < length) { - char = this.peek(index); - if (!/[gimy]/.test(char)) { - break; - } - if (char === "y") { - if (!state.inES6(true)) { - this.triggerAsync( - "warning", - { - code: "W119", - line: this.line, - character: this.char, - data: [ "Sticky RegExp flag", "6" ] - }, - checks, - function() { return true; } - ); - } - if (value.indexOf("y") > -1) { - malformedDesc = "Duplicate RegExp flag"; - } - } else { - flags.push(char); - } - value += char; - index += 1; - } - - // Check regular expression for correctness. - - try { - new RegExp(body, flags.join("")); - } catch (err) { - /** - * Because JSHint relies on the current engine's RegExp parser to - * validate RegExp literals, the description (exposed as the "data" - * property on the error object) is platform dependent. - */ - malformedDesc = err.message; - } - - if (malformedDesc) { - malformed = true; - this.trigger("error", { - code: "E016", - line: this.line, - character: this.char, - data: [ malformedDesc ] - }); - } - - return { - type: Token.RegExp, - value: value, - flags: flags, - isMalformed: malformed - }; - }, - - /* - * Scan for any occurrence of non-breaking spaces. Non-breaking spaces - * can be mistakenly typed on OS X with option-space. Non UTF-8 web - * pages with non-breaking pages produce syntax errors. - */ - scanNonBreakingSpaces: function() { - return state.option.nonbsp ? - this.input.search(/(\u00A0)/) : -1; - }, - - /* - * Scan for characters that get silently deleted by one or more browsers. - */ - scanUnsafeChars: function() { - return this.input.search(reg.unsafeChars); - }, - - /* - * Produce the next raw token or return 'null' if no tokens can be matched. - * This method skips over all space characters. - */ - next: function(checks) { - this.from = this.char; - - // Move to the next non-space character. - while (/\s/.test(this.peek())) { - this.from += 1; - this.skip(); - } - - // Methods that work with multi-line structures and move the - // character pointer. - - var match = this.scanComments(checks) || - this.scanStringLiteral(checks) || - this.scanTemplateLiteral(checks); - - if (match) { - return match; - } - - // Methods that don't move the character pointer. - - match = - this.scanRegExp(checks) || - this.scanPunctuator() || - this.scanKeyword() || - this.scanIdentifier() || - this.scanNumericLiteral(checks); - - if (match) { - this.skip(match.tokenLength || match.value.length); - return match; - } - - // No token could be matched, give up. - - return null; - }, - - /* - * Switch to the next line and reset all char pointers. Once - * switched, this method also checks for other minor warnings. - */ - nextLine: function(checks) { - var char; - - if (this.line >= this.getLines().length) { - return false; - } - - this.input = this.getLines()[this.line]; - this.line += 1; - this.char = 1; - this.from = 1; - - var inputTrimmed = this.input.trim(); - - var startsWith = function() { - return _.some(arguments, function(prefix) { - return inputTrimmed.indexOf(prefix) === 0; - }); - }; - - var endsWith = function() { - return _.some(arguments, function(suffix) { - return inputTrimmed.indexOf(suffix, inputTrimmed.length - suffix.length) !== -1; - }); - }; - - // If we are ignoring linter errors, replace the input with empty string - // if it doesn't already at least start or end a multi-line comment - if (this.ignoringLinterErrors === true) { - if (!startsWith("/*", "//") && !(this.inComment && endsWith("*/"))) { - this.input = ""; - } - } - - char = this.scanNonBreakingSpaces(); - if (char >= 0) { - this.triggerAsync( - "warning", - { code: "W125", line: this.line, character: char + 1 }, - checks, - function() { return true; } - ); - } - - this.input = this.input.replace(/\t/g, state.tab); - char = this.scanUnsafeChars(); - - if (char >= 0) { - this.triggerAsync( - "warning", - { code: "W100", line: this.line, character: char }, - checks, - function() { return true; } - ); - } - - // If there is a limit on line length, warn when lines get too - // long. - - if (!this.ignoringLinterErrors && state.option.maxlen && - state.option.maxlen < this.input.length) { - var inComment = this.inComment || - startsWith.call(inputTrimmed, "//") || - startsWith.call(inputTrimmed, "/*"); - - var shouldTriggerError = !inComment || !reg.maxlenException.test(inputTrimmed); - - if (shouldTriggerError) { - this.triggerAsync( - "warning", - { code: "W101", line: this.line, character: this.input.length }, - checks, - function() { return true; } - ); - } - } - - return true; - }, - - /* - * Produce the next token. This function is called by advance() to get - * the next token. It returns a token in a JSLint-compatible format. - */ - token: function() { - /*jshint loopfunc:true */ - var checks = asyncTrigger(); - var token; - - - function isReserved(token, isProperty) { - if (!token.reserved) { - return false; - } - var meta = token.meta; - - if (meta && meta.isFutureReservedWord && state.inES5()) { - // ES3 FutureReservedWord in an ES5 environment. - if (!meta.es5) { - return false; - } - - // Some ES5 FutureReservedWord identifiers are active only - // within a strict mode environment. - if (meta.strictOnly) { - if (!state.option.strict && !state.isStrict()) { - return false; - } - } - - if (isProperty) { - return false; - } - } - - return true; - } - - // Produce a token object. - var create = function(type, value, isProperty, token) { - /*jshint validthis:true */ - var obj; - - if (type !== "(endline)" && type !== "(end)") { - this.prereg = false; - } - - if (type === "(punctuator)") { - switch (value) { - case ".": - case ")": - case "~": - case "#": - case "]": - case "++": - case "--": - this.prereg = false; - break; - default: - this.prereg = true; - } - - obj = Object.create(state.syntax[value] || state.syntax["(error)"]); - } - - if (type === "(identifier)") { - if (value === "return" || value === "case" || value === "yield" || - value === "typeof" || value === "instanceof") { - this.prereg = true; - } - - if (_.has(state.syntax, value)) { - obj = Object.create(state.syntax[value] || state.syntax["(error)"]); - - // If this can't be a reserved keyword, reset the object. - if (!isReserved(obj, isProperty && type === "(identifier)")) { - obj = null; - } - } - } - - if (type === "(template)" || type === "(template middle)") { - this.prereg = true; - } - - if (!obj) { - obj = Object.create(state.syntax[type]); - } - - obj.identifier = (type === "(identifier)"); - obj.type = obj.type || type; - obj.value = value; - obj.line = this.line; - obj.character = this.char; - obj.from = this.from; - if (obj.identifier && token) obj.raw_text = token.text || token.value; - if (token && token.startLine && token.startLine !== this.line) { - obj.startLine = token.startLine; - } - if (token && token.context) { - // Context of current token - obj.context = token.context; - } - if (token && token.depth) { - // Nested template depth - obj.depth = token.depth; - } - if (token && token.isUnclosed) { - // Mark token as unclosed string / template literal - obj.isUnclosed = token.isUnclosed; - } - - if (isProperty && obj.identifier) { - obj.isProperty = isProperty; - } - - obj.check = checks.check; - - return obj; - }.bind(this); - - for (;;) { - if (!this.input.length) { - if (this.nextLine(checks)) { - return create("(endline)", ""); - } - - if (this.exhausted) { - return null; - } - - this.exhausted = true; - return create("(end)", ""); - } - - token = this.next(checks); - - if (!token) { - if (this.input.length) { - // Unexpected character. - this.trigger("error", { - code: "E024", - line: this.line, - character: this.char, - data: [ this.peek() ] - }); - - this.input = ""; - } - - continue; - } - - switch (token.type) { - case Token.StringLiteral: - this.triggerAsync("String", { - line: this.line, - char: this.char, - from: this.from, - startLine: token.startLine, - startChar: token.startChar, - value: token.value, - quote: token.quote - }, checks, function() { return true; }); - - return create("(string)", token.value, null, token); - - case Token.TemplateHead: - this.trigger("TemplateHead", { - line: this.line, - char: this.char, - from: this.from, - startLine: token.startLine, - startChar: token.startChar, - value: token.value - }); - return create("(template)", token.value, null, token); - - case Token.TemplateMiddle: - this.trigger("TemplateMiddle", { - line: this.line, - char: this.char, - from: this.from, - startLine: token.startLine, - startChar: token.startChar, - value: token.value - }); - return create("(template middle)", token.value, null, token); - - case Token.TemplateTail: - this.trigger("TemplateTail", { - line: this.line, - char: this.char, - from: this.from, - startLine: token.startLine, - startChar: token.startChar, - value: token.value - }); - return create("(template tail)", token.value, null, token); - - case Token.NoSubstTemplate: - this.trigger("NoSubstTemplate", { - line: this.line, - char: this.char, - from: this.from, - startLine: token.startLine, - startChar: token.startChar, - value: token.value - }); - return create("(no subst template)", token.value, null, token); - - case Token.Identifier: - this.triggerAsync("Identifier", { - line: this.line, - char: this.char, - from: this.from, - name: token.value, - raw_name: token.text, - isProperty: state.tokens.curr.id === "." - }, checks, function() { return true; }); - - /* falls through */ - case Token.Keyword: - case Token.NullLiteral: - case Token.BooleanLiteral: - return create("(identifier)", token.value, state.tokens.curr.id === ".", token); - - case Token.NumericLiteral: - if (token.isMalformed) { - // This condition unequivocally describes a syntax error. - // TODO: Re-factor as an "error" (not a "warning"). - this.trigger("warning", { - code: "W045", - line: this.line, - character: this.char, - data: [ token.value ] - }); - } - - this.triggerAsync("warning", { - code: "W114", - line: this.line, - character: this.char, - data: [ "0x-" ] - }, checks, function() { return token.base === 16 && state.jsonMode; }); - - this.triggerAsync("warning", { - code: "W115", - line: this.line, - character: this.char - }, checks, function() { - return state.isStrict() && token.base === 8 && token.isLegacy; - }); - - this.trigger("Number", { - line: this.line, - char: this.char, - from: this.from, - value: token.value, - base: token.base, - isMalformed: token.malformed - }); - - return create("(number)", token.value); - - case Token.RegExp: - return create("(regexp)", token.value); - - case Token.Comment: - state.tokens.curr.comment = true; - - if (token.isSpecial) { - return { - id: '(comment)', - value: token.value, - body: token.body, - type: token.commentType, - isSpecial: token.isSpecial, - line: this.line, - character: this.char, - from: this.from - }; - } - - break; - - case "": - break; - - default: - return create("(punctuator)", token.value); - } - } - } -}; - -exports.Lexer = Lexer; -exports.Context = Context; - -},{"../data/ascii-identifier-data.js":1,"../data/non-ascii-identifier-part-only.js":2,"../data/non-ascii-identifier-start.js":3,"./reg.js":17,"./state.js":19,"events":5,"lodash":12}],14:[function(require,module,exports){ -"use strict"; - -var _ = require("lodash"); - -var errors = { - // JSHint options - E001: "Bad option: '{a}'.", - E002: "Bad option value.", - - // JSHint input - E003: "Expected a JSON value.", - E004: "Input is neither a string nor an array of strings.", - E005: "Input is empty.", - E006: "Unexpected early end of program.", - - // Strict mode - E007: "Missing \"use strict\" statement.", - E008: "Strict violation.", - E009: "Option 'validthis' can't be used in a global scope.", - E010: "'with' is not allowed in strict mode.", - - // Constants - E011: "'{a}' has already been declared.", - E012: "const '{a}' is initialized to 'undefined'.", - E013: "Attempting to override '{a}' which is a constant.", - - // Regular expressions - E014: "A regular expression literal can be confused with '/='.", - E015: "Unclosed regular expression.", - E016: "Invalid regular expression.", - - // Tokens - E017: "Unclosed comment.", - E018: "Unbegun comment.", - E019: "Unmatched '{a}'.", - E020: "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.", - E021: "Expected '{a}' and instead saw '{b}'.", - E022: "Line breaking error '{a}'.", - E023: "Missing '{a}'.", - E024: "Unexpected '{a}'.", - E025: "Missing ':' on a case clause.", - E026: "Missing '}' to match '{' from line {a}.", - E027: "Missing ']' to match '[' from line {a}.", - E028: "Illegal comma.", - E029: "Unclosed string.", - - // Everything else - E030: "Expected an identifier and instead saw '{a}'.", - E031: "Bad assignment.", // FIXME: Rephrase - E032: "Expected a small integer or 'false' and instead saw '{a}'.", - E033: "Expected an operator and instead saw '{a}'.", - E034: "get/set are ES5 features.", - E035: "Missing property name.", - E036: "Expected to see a statement and instead saw a block.", - E037: null, - E038: null, - E039: "Function declarations are not invocable. Wrap the whole function invocation in parens.", - E040: "Each value should have its own case label.", - E041: "Unrecoverable syntax error.", - E042: "Stopping.", - E043: "Too many errors.", - E044: null, - E045: "Invalid for each loop.", - E046: "Yield expressions may only occur within generator functions.", - E047: null, - E048: "{a} declaration not directly within block.", - E049: "A {a} cannot be named '{b}'.", - E050: "Mozilla requires the yield expression to be parenthesized here.", - E051: null, - E052: "Unclosed template literal.", - E053: "{a} declarations are only allowed at the top level of module scope.", - E054: "Class properties must be methods. Expected '(' but instead saw '{a}'.", - E055: "The '{a}' option cannot be set after any executable code.", - E056: "'{a}' was used before it was declared, which is illegal for '{b}' variables.", - E057: "Invalid meta property: '{a}.{b}'.", - E058: "Missing semicolon.", - E059: "Incompatible values for the '{a}' and '{b}' linting options.", - E060: "Non-callable values cannot be used as the second operand to instanceof.", - E061: "Invalid position for 'yield' expression (consider wrapping in parenthesis)." -}; - -var warnings = { - W001: "'hasOwnProperty' is a really bad name.", - W002: "Value of '{a}' may be overwritten in IE 8 and earlier.", - W003: "'{a}' was used before it was defined.", - W004: "'{a}' is already defined.", - W005: "A dot following a number can be confused with a decimal point.", - W006: "Confusing minuses.", - W007: "Confusing plusses.", - W008: "A leading decimal point can be confused with a dot: '{a}'.", - W009: "The array literal notation [] is preferable.", - W010: "The object literal notation {} is preferable.", - W011: null, - W012: null, - W013: null, - W014: "Misleading line break before '{a}'; readers may interpret this as an expression boundary.", - W015: null, - W016: "Unexpected use of '{a}'.", - W017: "Bad operand.", - W018: "Confusing use of '{a}'.", - W019: "Use the isNaN function to compare with NaN.", - W020: "Read only.", - W021: "Reassignment of '{a}', which is is a {b}. " + - "Use 'var' or 'let' to declare bindings that may change.", - W022: "Do not assign to the exception parameter.", - W023: "Expected an identifier in an assignment and instead saw a function invocation.", - W024: "Expected an identifier and instead saw '{a}' (a reserved word).", - W025: "Missing name in function declaration.", - W026: "Inner functions should be listed at the top of the outer function.", - W027: "Unreachable '{a}' after '{b}'.", - W028: "Label '{a}' on {b} statement.", - W030: "Expected an assignment or function call and instead saw an expression.", - W031: "Do not use 'new' for side effects.", - W032: "Unnecessary semicolon.", - W033: "Missing semicolon.", - W034: "Unnecessary directive \"{a}\".", - W035: "Empty block.", - W036: "Unexpected /*member '{a}'.", - W037: "'{a}' is a statement label.", - W038: "'{a}' used out of scope.", - W039: "'{a}' is not allowed.", - W040: "If a strict mode function is executed using function invocation, " + - "its 'this' value will be undefined.", - W041: null, - W042: "Avoid EOL escaping.", - W043: "Bad escaping of EOL. Use option multistr if needed.", - W044: "Bad or unnecessary escaping.", /* TODO(caitp): remove W044 */ - W045: "Bad number '{a}'.", - W046: "Don't use extra leading zeros '{a}'.", - W047: "A trailing decimal point can be confused with a dot: '{a}'.", - W048: "Unexpected control character in regular expression.", - W049: "Unexpected escaped character '{a}' in regular expression.", - W050: "JavaScript URL.", - W051: "Variables should not be deleted.", - W052: "Unexpected '{a}'.", - W053: "Do not use {a} as a constructor.", - W054: "The Function constructor is a form of eval.", - W055: "A constructor name should start with an uppercase letter.", - W056: "Bad constructor.", - W057: "Weird construction. Is 'new' necessary?", - W058: "Missing '()' invoking a constructor.", - W059: "Avoid arguments.{a}.", - W060: "document.write can be a form of eval.", - W061: "eval can be harmful.", - W062: "Wrap an immediate function invocation in parens " + - "to assist the reader in understanding that the expression " + - "is the result of a function, and not the function itself.", - W063: "Math is not a function.", - W064: "Missing 'new' prefix when invoking a constructor.", - W065: "Missing radix parameter.", - W066: "Implied eval. Consider passing a function instead of a string.", - W067: "Bad invocation.", - W068: "Wrapping non-IIFE function literals in parens is unnecessary.", - W069: "['{a}'] is better written in dot notation.", - W070: "Extra comma. (it breaks older versions of IE)", - W071: "This function has too many statements. ({a})", - W072: "This function has too many parameters. ({a})", - W073: "Blocks are nested too deeply. ({a})", - W074: "This function's cyclomatic complexity is too high. ({a})", - W075: "Duplicate {a} '{b}'.", - W076: "Unexpected parameter '{a}' in get {b} function.", - W077: "Expected a single parameter in set {a} function.", - W078: "Setter is defined without getter.", - W079: "Redefinition of '{a}'.", - W080: "It's not necessary to initialize '{a}' to 'undefined'.", - W081: null, - W082: "Function declarations should not be placed in blocks. " + - "Use a function expression or move the statement to the top of " + - "the outer function.", - W083: "Functions declared within loops referencing an outer scoped " + - "variable may lead to confusing semantics.", - W084: "Expected a conditional expression and instead saw an assignment.", - W085: "Don't use 'with'.", - W086: "Expected a 'break' statement before '{a}'.", - W087: "Forgotten 'debugger' statement?", - W088: "Creating global 'for' variable. Should be 'for (var {a} ...'.", - W089: "The body of a for in should be wrapped in an if statement to filter " + - "unwanted properties from the prototype.", - W090: "'{a}' is not a statement label.", - W091: null, - W093: "Did you mean to return a conditional instead of an assignment?", - W094: "Unexpected comma.", - W095: "Expected a string and instead saw {a}.", - W096: "The '{a}' key may produce unexpected results.", - W097: "Use the function form of \"use strict\".", - W098: "'{a}' is defined but never used.", - W099: null, - W100: "This character may get silently deleted by one or more browsers.", - W101: "Line is too long.", - W102: null, - W103: "The '{a}' property is deprecated.", - W104: "'{a}' is available in ES{b} (use 'esversion: {b}') or Mozilla JS extensions (use moz).", - W105: "Unexpected {a} in '{b}'.", - W106: "Identifier '{a}' is not in camel case.", - W107: "Script URL.", - W108: "Strings must use doublequote.", - W109: "Strings must use singlequote.", - W110: "Mixed double and single quotes.", - W112: "Unclosed string.", - W113: "Control character in string: {a}.", - W114: "Avoid {a}.", - W115: "Octal literals are not allowed in strict mode.", - W116: "Expected '{a}' and instead saw '{b}'.", - W117: "'{a}' is not defined.", - W118: "'{a}' is only available in Mozilla JavaScript extensions (use moz option).", - W119: "'{a}' is only available in ES{b} (use 'esversion: {b}').", - W120: "You might be leaking a variable ({a}) here.", - W121: "Extending prototype of native object: '{a}'.", - W122: "Invalid typeof value '{a}'", - W123: "'{a}' is already defined in outer scope.", - W124: "A generator function should contain at least one yield expression.", - W125: "This line contains non-breaking spaces: http://jshint.com/docs/options/#nonbsp", - W126: "Unnecessary grouping operator.", - W127: "Unexpected use of a comma operator.", - W128: "Empty array elements require elision=true.", - W129: "'{a}' is defined in a future version of JavaScript. Use a " + - "different variable name to avoid migration issues.", - W130: "Invalid element after rest element.", - W131: "Invalid parameter after rest parameter.", - W132: "`var` declarations are forbidden. Use `let` or `const` instead.", - W133: "Invalid for-{a} loop left-hand-side: {b}.", - W134: "The '{a}' option is only available when linting ECMAScript {b} code.", - W135: "{a} may not be supported by non-browser environments.", - W136: "'{a}' must be in function scope.", - W137: "Empty destructuring.", - W138: "Regular parameters should not come after default parameters.", - W139: "Function expressions should not be used as the second operand to instanceof.", - W140: "Missing comma." -}; - -var info = { - I001: "Comma warnings can be turned off with 'laxcomma'.", - I002: null, - I003: "ES5 option is now set per default" -}; - -exports.errors = {}; -exports.warnings = {}; -exports.info = {}; - -_.each(errors, function(desc, code) { - exports.errors[code] = { code: code, desc: desc }; -}); - -_.each(warnings, function(desc, code) { - exports.warnings[code] = { code: code, desc: desc }; -}); - -_.each(info, function(desc, code) { - exports.info[code] = { code: code, desc: desc }; -}); - -},{"lodash":12}],15:[function(require,module,exports){ -"use strict"; - -function NameStack() { - this._stack = []; -} - -Object.defineProperty(NameStack.prototype, "length", { - get: function() { - return this._stack.length; - } -}); - -/** - * Create a new entry in the stack. Useful for tracking names across - * expressions. - */ -NameStack.prototype.push = function() { - this._stack.push(null); -}; - -/** - * Discard the most recently-created name on the stack. - */ -NameStack.prototype.pop = function() { - this._stack.pop(); -}; - -/** - * Update the most recent name on the top of the stack. - * - * @param {object} token The token to consider as the source for the most - * recent name. - */ -NameStack.prototype.set = function(token) { - this._stack[this.length - 1] = token; -}; - -/** - * Generate a string representation of the most recent name. - * - * @returns {string} - */ -NameStack.prototype.infer = function() { - var nameToken = this._stack[this.length - 1]; - var prefix = ""; - var type; - - // During expected operation, the topmost entry on the stack will only - // reflect the current function's name when the function is declared without - // the `function` keyword (i.e. for in-line accessor methods). In other - // cases, the `function` expression itself will introduce an empty entry on - // the top of the stack, and this should be ignored. - if (!nameToken || nameToken.type === "class") { - nameToken = this._stack[this.length - 2]; - } - - if (!nameToken) { - return "(empty)"; - } - - type = nameToken.type; - - if (type !== "(string)" && type !== "(number)" && type !== "(identifier)" && type !== "default") { - return "(expression)"; - } - - if (nameToken.accessorType) { - prefix = nameToken.accessorType + " "; - } - - return prefix + nameToken.value; -}; - -module.exports = NameStack; - -},{}],16:[function(require,module,exports){ -"use strict"; - -// These are the JSHint boolean options. -exports.bool = { - enforcing: { - - /** - * This option prohibits the use of bitwise operators such as `^` (XOR), - * `|` (OR) and others. Bitwise operators are very rare in JavaScript - * programs and quite often `&` is simply a mistyped `&&`. - */ - bitwise : true, - - /** - * - * This options prohibits overwriting prototypes of native objects such as - * `Array`, `Date` and so on. - * - * // jshint freeze:true - * Array.prototype.count = function (value) { return 4; }; - * // -> Warning: Extending prototype of native object: 'Array'. - */ - freeze : true, - - /** - * This option allows you to force all variable names to use either - * camelCase style or UPPER_CASE with underscores. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - camelcase : true, - - /** - * This option requires you to always put curly braces around blocks in - * loops and conditionals. JavaScript allows you to omit curly braces when - * the block consists of only one statement, for example: - * - * while (day) - * shuffle(); - * - * However, in some circumstances, it can lead to bugs (you'd think that - * `sleep()` is a part of the loop while in reality it is not): - * - * while (day) - * shuffle(); - * sleep(); - */ - curly : true, - - /** - * This options prohibits the use of `==` and `!=` in favor of `===` and - * `!==`. The former try to coerce values before comparing them which can - * lead to some unexpected results. The latter don't do any coercion so - * they are generally safer. If you would like to learn more about type - * coercion in JavaScript, we recommend [Truth, Equality and - * JavaScript](http://javascriptweblog.wordpress.com/2011/02/07/truth-equality-and-javascript/) - * by Angus Croll. - */ - eqeqeq : true, - - /** - * This option enables warnings about the use of identifiers which are - * defined in future versions of JavaScript. Although overwriting them has - * no effect in contexts where they are not implemented, this practice can - * cause issues when migrating codebases to newer versions of the language. - */ - futurehostile: true, - - /** - * This option tells JSHint that your code needs to adhere to ECMAScript 3 - * specification. Use this option if you need your program to be executable - * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy - * JavaScript environments. - * - * @deprecated Use `esversion: 3` instead. - */ - es3 : true, - - /** - * This option enables syntax first defined in [the ECMAScript 5.1 - * specification](http://es5.github.io/). This includes allowing reserved - * keywords as object properties. - * - * @deprecated Use `esversion: 5` instead. - */ - es5 : true, - - /** - * This option requires all `for in` loops to filter object's items. The - * for in statement allows for looping through the names of all of the - * properties of an object including those inherited through the prototype - * chain. This behavior can lead to unexpected items in your object so it - * is generally safer to always filter inherited properties out as shown in - * the example: - * - * for (key in obj) { - * if (obj.hasOwnProperty(key)) { - * // We are sure that obj[key] belongs to the object and was not inherited. - * } - * } - * - * For more in-depth understanding of `for in` loops in JavaScript, read - * [Exploring JavaScript for-in - * loops](http://javascriptweblog.wordpress.com/2011/01/04/exploring-javascript-for-in-loops/) - * by Angus Croll. - */ - forin : true, - - /** - * This option prohibits the use of immediate function invocations without - * wrapping them in parentheses. Wrapping parentheses assists readers of - * your code in understanding that the expression is the result of a - * function, and not the function itself. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - immed : true, - - /** - * This option requires you to capitalize names of constructor functions. - * Capitalizing functions that are intended to be used with `new` operator - * is just a convention that helps programmers to visually distinguish - * constructor functions from other types of functions to help spot - * mistakes when using `this`. - * - * Not doing so won't break your code in any browsers or environments but - * it will be a bit harder to figure out—by reading the code—if the - * function was supposed to be used with or without new. And this is - * important because when the function that was intended to be used with - * `new` is used without it, `this` will point to the global object instead - * of a new object. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - newcap : true, - - /** - * This option prohibits the use of `arguments.caller` and - * `arguments.callee`. Both `.caller` and `.callee` make quite a few - * optimizations impossible so they were deprecated in future versions of - * JavaScript. In fact, ECMAScript 5 forbids the use of `arguments.callee` - * in strict mode. - */ - noarg : true, - - /** - * This option prohibits the use of the comma operator. When misused, the - * comma operator can obscure the value of a statement and promote - * incorrect code. - */ - nocomma : true, - - /** - * This option warns when you have an empty block in your code. JSLint was - * originally warning for all empty blocks and we simply made it optional. - * There were no studies reporting that empty blocks in JavaScript break - * your code in any way. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - noempty : true, - - /** - * This option warns about "non-breaking whitespace" characters. These - * characters can be entered with option-space on Mac computers and have a - * potential of breaking non-UTF8 web pages. - */ - nonbsp : true, - - /** - * This option prohibits the use of constructor functions for side-effects. - * Some people like to call constructor functions without assigning its - * result to any variable: - * - * new MyConstructor(); - * - * There is no advantage in this approach over simply calling - * `MyConstructor` since the object that the operator `new` creates isn't - * used anywhere so you should generally avoid constructors like this one. - */ - nonew : true, - - /** - * This option prohibits the use of explicitly undeclared variables. This - * option is very useful for spotting leaking and mistyped variables. - * - * // jshint undef:true - * - * function test() { - * var myVar = 'Hello, World'; - * console.log(myvar); // Oops, typoed here. JSHint with undef will complain - * } - * - * If your variable is defined in another file, you can use the `global` - * directive to tell JSHint about it. - */ - undef : true, - - /** - * This option prohibits the use of the grouping operator when it is not - * strictly required. Such usage commonly reflects a misunderstanding of - * unary operators, for example: - * - * // jshint singleGroups: true - * - * delete(obj.attr); // Warning: Unnecessary grouping operator. - */ - singleGroups: false, - - /** - * When set to true, the use of VariableStatements are forbidden. - * For example: - * - * // jshint varstmt: true - * - * var a; // Warning: `var` declarations are forbidden. Use `let` or `const` instead. - */ - varstmt: false, - - /** - * This option is a short hand for the most strict JSHint configuration as - * available in JSHint version 2.6.3. It enables all enforcing options and - * disables all relaxing options that were defined in that release. - * - * @deprecated The option cannot be maintained without automatically opting - * users in to new features. This can lead to unexpected - * warnings/errors in when upgrading between minor versions of - * JSHint. - */ - enforceall : false, - - /** - * This option warns when a comma is not placed after the last element in an - * array or object literal. Due to bugs in old versions of IE, trailing - * commas used to be discouraged, but since ES5 their semantics were - * standardized. (See - * [#11.1.4](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.4) and - * [#11.1.5](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.5).) - * Now, they help to prevent the same [visual - * ambiguities](http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.2) - * that the strict usage of semicolons helps prevent. - * - * For example, this code might have worked last Tuesday: - * - * [ - * b + c - * ].forEach(print); - * - * But if one adds an element to the array and forgets to compensate for the - * missing comma, no syntax error is thrown, and a linter cannot determine - * if this was a mistake or an intentional function invocation. - * - * [ - * b + c - * (d + e) - * ].forEach(print); - * - * If one always appends a list item with a comma, this ambiguity cannot - * occur: - * - * [ - * b + c, - * ].forEach(print); - * - * [ - * b + c, - * (d + e), - * ].forEach(print); - */ - trailingcomma: false - }, - relaxing: { - - /** - * This option suppresses warnings about missing semicolons. There is a lot - * of FUD about semicolon spread by quite a few people in the community. - * The common myths are that semicolons are required all the time (they are - * not) and that they are unreliable. JavaScript has rules about semicolons - * which are followed by *all* browsers so it is up to you to decide - * whether you should or should not use semicolons in your code. - * - * For more information about semicolons in JavaScript read [An Open Letter - * to JavaScript Leaders Regarding - * Semicolons](http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding) - * by Isaac Schlueter and [JavaScript Semicolon - * Insertion](http://inimino.org/~inimino/blog/javascript_semicolons). - */ - asi : true, - - /** - * This option suppresses warnings about multi-line strings. Multi-line - * strings can be dangerous in JavaScript because all hell breaks loose if - * you accidentally put a whitespace in between the escape character (`\`) - * and a new line. - * - * Note that even though this option allows correct multi-line strings, it - * still warns about multi-line strings without escape characters or with - * anything in between the escape character and a whitespace. - * - * // jshint multistr:true - * - * var text = "Hello\ - * World"; // All good. - * - * text = "Hello - * World"; // Warning, no escape character. - * - * text = "Hello\ - * World"; // Warning, there is a space after \ - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - multistr : true, - - /** - * This option suppresses warnings about the `debugger` statements in your - * code. - */ - debug : true, - - /** - * This option suppresses warnings about the use of assignments in cases - * where comparisons are expected. More often than not, code like `if (a = - * 10) {}` is a typo. However, it can be useful in cases like this one: - * - * for (var i = 0, person; person = people[i]; i++) {} - * - * You can silence this error on a per-use basis by surrounding the assignment - * with parenthesis, such as: - * - * for (var i = 0, person; (person = people[i]); i++) {} - */ - boss : true, - - /** - * This option suppresses warnings about the use of `eval`. The use of - * `eval` is discouraged because it can make your code vulnerable to - * various injection attacks and it makes it hard for JavaScript - * interpreter to do certain optimizations. - */ - evil : true, - - /** - * This option suppresses warnings about declaring variables inside of - * control - * structures while accessing them later from the outside. Even though - * JavaScript has only two real scopes—global and function—such practice - * leads to confusion among people new to the language and hard-to-debug - * bugs. This is why, by default, JSHint warns about variables that are - * used outside of their intended scope. - * - * function test() { - * if (true) { - * var x = 0; - * } - * - * x += 1; // Default: 'x' used out of scope. - * // No warning when funcscope:true - * } - */ - funcscope : true, - - /** - * This option suppresses warnings about the use of global strict mode. - * Global strict mode can break third-party widgets so it is not - * recommended. - * - * For more info about strict mode see the `strict` option. - * - * @deprecated Use `strict: "global"`. - */ - globalstrict: true, - - /** - * This option suppresses warnings about the `__iterator__` property. This - * property is not supported by all browsers so use it carefully. - */ - iterator : true, - - /** - * This option suppresses warnings about invalid `typeof` operator values. - * This operator has only [a limited set of possible return - * values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof). - * By default, JSHint warns when you compare its result with an invalid - * value which often can be a typo. - * - * // 'fuction' instead of 'function' - * if (typeof a == "fuction") { // Invalid typeof value 'fuction' - * // ... - * } - * - * Do not use this option unless you're absolutely sure you don't want - * these checks. - */ - notypeof : true, - - /** - * This option prohibits the use of unary increment and decrement - * operators. Some people think that `++` and `--` reduces the quality of - * their coding styles and there are programming languages—such as - * Python—that go completely without these operators. - */ - plusplus : true, - - /** - * This option suppresses warnings about the `__proto__` property. - */ - proto : true, - - /** - * This option suppresses warnings about the use of script-targeted - * URLs—such as `javascript:...`. - */ - scripturl : true, - - /** - * This option suppresses warnings about using `[]` notation when it can be - * expressed in dot notation: `person['name']` vs. `person.name`. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - sub : true, - - /** - * This option suppresses warnings about "weird" constructions like - * `new function () { ... }` and `new Object;`. Such constructions are - * sometimes used to produce singletons in JavaScript: - * - * var singleton = new function() { - * var privateVar; - * - * this.publicMethod = function () {} - * this.publicMethod2 = function () {} - * }; - */ - supernew : true, - - /** - * This option suppresses most of the warnings about possibly unsafe line - * breakings in your code. It doesn't suppress warnings about comma-first - * coding style. To suppress those you have to use `laxcomma` (see below). - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - laxbreak : true, - - /** - * This option suppresses warnings about comma-first coding style: - * - * var obj = { - * name: 'Anton' - * , handle: 'valueof' - * , role: 'SW Engineer' - * }; - * - * @deprecated JSHint is limiting its scope to issues of code correctness. - * If you would like to enforce rules relating to code style, - * check out [the JSCS - * project](https://github.com/jscs-dev/node-jscs). - */ - laxcomma : true, - - /** - * This option suppresses warnings about possible strict violations when - * the code is running in strict mode and you use `this` in a - * non-constructor function. You should use this option—in a function scope - * only—when you are positive that your use of `this` is valid in the - * strict mode (for example, if you call your function using - * `Function.call`). - * - * **Note:** This option can be used only inside of a function scope. - * JSHint will fail with an error if you will try to set this option - * globally. - */ - validthis : true, - - /** - * This option suppresses warnings about the use of the `with` statement. - * The semantics of the `with` statement can cause confusion among - * developers and accidental definition of global variables. - * - * More info: - * - * * [with Statement Considered - * Harmful](http://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/) - */ - withstmt : true, - - /** - * This options tells JSHint that your code uses Mozilla JavaScript - * extensions. Unless you develop specifically for the Firefox web browser - * you don't need this option. - * - * More info: - * - * * [New in JavaScript - * 1.7](https://developer.mozilla.org/en-US/docs/JavaScript/New_in_JavaScript/1.7) - */ - moz : true, - - /** - * This option suppresses warnings about generator functions with no - * `yield` statement in them. - */ - noyield : true, - - /** - * This option suppresses warnings about `== null` comparisons. Such - * comparisons are often useful when you want to check if a variable is - * `null` or `undefined`. - */ - eqnull : true, - - /** - * This option suppresses warnings about missing semicolons, but only when - * the semicolon is omitted for the last statement in a one-line block: - * - * var name = (function() { return 'Anton' }()); - * - * This is a very niche use case that is useful only when you use automatic - * JavaScript code generators. - */ - lastsemic : true, - - /** - * This option suppresses warnings about functions inside of loops. - * Defining functions inside of loops can lead to bugs such as this one: - * - * var nums = []; - * - * for (var i = 0; i < 10; i++) { - * nums[i] = function (j) { - * return i + j; - * }; - * } - * - * nums[0](2); // Prints 12 instead of 2 - * - * To fix the code above you need to copy the value of `i`: - * - * var nums = []; - * - * for (var i = 0; i < 10; i++) { - * (function (i) { - * nums[i] = function (j) { - * return i + j; - * }; - * }(i)); - * } - */ - loopfunc : true, - - /** - * This option suppresses warnings about the use of expressions where - * normally you would expect to see assignments or function calls. Most of - * the time, such code is a typo. However, it is not forbidden by the spec - * and that's why this warning is optional. - */ - expr : true, - - /** - * This option tells JSHint that your code uses ECMAScript 6 specific - * syntax. Note that not all browsers implement these features. - * - * More info: - * - * * [Specification for ECMAScript - * 6](http://www.ecma-international.org/ecma-262/6.0/index.html) - * - * @deprecated Use `esversion: 6` instead. - */ - esnext : true, - - /** - * This option tells JSHint that your code uses ES3 array elision elements, - * or empty elements (for example, `[1, , , 4, , , 7]`). - */ - elision : true, - }, - - // Third party globals - environments: { - - /** - * This option defines globals exposed by the - * [MooTools](http://mootools.net/) JavaScript framework. - */ - mootools : true, - - /** - * This option defines globals exposed by - * [CouchDB](http://couchdb.apache.org/). CouchDB is a document-oriented - * database that can be queried and indexed in a MapReduce fashion using - * JavaScript. - */ - couch : true, - - /** - * This option defines globals exposed by [the Jasmine unit testing - * framework](https://jasmine.github.io/). - */ - jasmine : true, - - /** - * This option defines globals exposed by the [jQuery](http://jquery.com/) - * JavaScript library. - */ - jquery : true, - - /** - * This option defines globals available when your code is running inside - * of the Node runtime environment. [Node.js](http://nodejs.org/) is a - * server-side JavaScript environment that uses an asynchronous - * event-driven model. This option also skips some warnings that make sense - * in the browser environments but don't make sense in Node such as - * file-level `use strict` pragmas and `console.log` statements. - */ - node : true, - - /** - * This option defines globals exposed by [the QUnit unit testing - * framework](http://qunitjs.com/). - */ - qunit : true, - - /** - * This option defines globals available when your code is running inside - * of the Rhino runtime environment. [Rhino](http://www.mozilla.org/rhino/) - * is an open-source implementation of JavaScript written entirely in Java. - */ - rhino : true, - - /** - * This option defines globals exposed by [the ShellJS - * library](http://documentup.com/arturadib/shelljs). - */ - shelljs : true, - - /** - * This option defines globals exposed by the - * [Prototype](http://www.prototypejs.org/) JavaScript framework. - */ - prototypejs : true, - - /** - * This option defines globals exposed by the [YUI](http://yuilibrary.com/) - * JavaScript framework. - */ - yui : true, - - /** - * This option defines globals exposed by the "BDD" and "TDD" UIs of the - * [Mocha unit testing framework](http://mochajs.org/). - */ - mocha : true, - - /** - * This option informs JSHint that the input code describes an ECMAScript 6 - * module. All module code is interpreted as strict mode code. - */ - module : true, - - /** - * This option defines globals available when your code is running as a - * script for the [Windows Script - * Host](http://en.wikipedia.org/wiki/Windows_Script_Host). - */ - wsh : true, - - /** - * This option defines globals available when your code is running inside - * of a Web Worker. [Web - * Workers](https://developer.mozilla.org/en/Using_web_workers) provide a - * simple means for web content to run scripts in background threads. - */ - worker : true, - - /** - * This option defines non-standard but widely adopted globals such as - * `escape` and `unescape`. - */ - nonstandard : true, - - /** - * This option defines globals exposed by modern browsers: all the way from - * good old `document` and `navigator` to the HTML5 `FileReader` and other - * new developments in the browser world. - * - * **Note:** This option doesn't expose variables like `alert` or - * `console`. See option `devel` for more information. - */ - browser : true, - - /** - * This option defines globals available when using [the Browserify - * tool](http://browserify.org/) to build a project. - */ - browserify : true, - - /** - * This option defines globals that are usually used for logging poor-man's - * debugging: `console`, `alert`, etc. It is usually a good idea to not - * ship them in production because, for example, `console.log` breaks in - * legacy versions of Internet Explorer. - */ - devel : true, - - /** - * This option defines globals exposed by the [Dojo - * Toolkit](http://dojotoolkit.org/). - */ - dojo : true, - - /** - * This option defines globals for typed array constructors. - * - * More info: - * - * * [JavaScript typed - * arrays](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays) - */ - typed : true, - - /** - * This option defines globals available when your core is running inside - * of the PhantomJS runtime environment. [PhantomJS](http://phantomjs.org/) - * is a headless WebKit scriptable with a JavaScript API. It has fast and - * native support for various web standards: DOM handling, CSS selector, - * JSON, Canvas, and SVG. - */ - phantom : true - }, - - // Obsolete options - obsolete: { - onecase : true, // if one case switch statements should be allowed - regexp : true, // if the . should not be allowed in regexp literals - regexdash : true // if unescaped first/last dash (-) inside brackets - // should be tolerated - } -}; - -// These are the JSHint options that can take any value -// (we use this object to detect invalid options) -exports.val = { - - /** - * This option lets you set the maximum length of a line. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. If - * you would like to enforce rules relating to code style, check - * out [the JSCS project](https://github.com/jscs-dev/node-jscs). - */ - maxlen : false, - - /** - * This option sets a specific tab width for your code. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. If - * you would like to enforce rules relating to code style, check - * out [the JSCS project](https://github.com/jscs-dev/node-jscs). - */ - indent : false, - - /** - * This options allows you to set the maximum amount of warnings JSHint will - * produce before giving up. Default is 50. - */ - maxerr : false, - - /** - * This option allows you to control which variables JSHint considers to be - * implicitly defined in the environment. Configure it with an array of - * string values. Prefixing a variable name with a hyphen (-) character will - * remove that name from the collection of predefined variables. - * - * JSHint will consider variables declared in this way to be read-only. - * - * This option cannot be specified in-line; it may only be used via the - * JavaScript API or from an external configuration file. - */ - predef : false, - - /** - * This option can be used to specify a white list of global variables that - * are not formally defined in the source code. This is most useful when - * combined with the `undef` option in order to suppress warnings for - * project-specific global variables. - * - * Setting an entry to `true` enables reading and writing to that variable. - * Setting it to `false` will trigger JSHint to consider that variable - * read-only. - * - * See also the "environment" options: a set of options to be used as short - * hand for enabling global variables defined in common JavaScript - * environments. - * - * To configure `globals` within an individual file, see [Inline - * Configuration](http://jshint.com/docs/#inline-configuration). - */ - globals : false, - - /** - * This option enforces the consistency of quotation marks used throughout - * your code. It accepts three values: `true` if you don't want to enforce - * one particular style but want some consistency, `"single"` if you want to - * allow only single quotes and `"double"` if you want to allow only double - * quotes. - * - * @deprecated JSHint is limiting its scope to issues of code correctness. If - * you would like to enforce rules relating to code style, check - * out [the JSCS project](https://github.com/jscs-dev/node-jscs). - */ - quotmark : false, - - scope : false, - - /** - * This option lets you set the max number of statements allowed per function: - * - * // jshint maxstatements:4 - * - * function main() { - * var i = 0; - * var j = 0; - * - * // Function declarations count as one statement. Their bodies - * // don't get taken into account for the outer function. - * function inner() { - * var i2 = 1; - * var j2 = 1; - * - * return i2 + j2; - * } - * - * j = i + j; - * return j; // JSHint: Too many statements per function. (5) - * } - */ - maxstatements: false, - - /** - * This option lets you control how nested do you want your blocks to be: - * - * // jshint maxdepth:2 - * - * function main(meaning) { - * var day = true; - * - * if (meaning === 42) { - * while (day) { - * shuffle(); - * - * if (tired) { // JSHint: Blocks are nested too deeply (3). - * sleep(); - * } - * } - * } - * } - */ - maxdepth : false, - - /** - * This option lets you set the max number of formal parameters allowed per - * function: - * - * // jshint maxparams:3 - * - * function login(request, onSuccess) { - * // ... - * } - * - * // JSHint: Too many parameters per function (4). - * function logout(request, isManual, whereAmI, onSuccess) { - * // ... - * } - */ - maxparams : false, - - /** - * This option lets you control cyclomatic complexity throughout your code. - * Cyclomatic complexity measures the number of linearly independent paths - * through a program's source code. Read more about [cyclomatic complexity on - * Wikipedia](http://en.wikipedia.org/wiki/Cyclomatic_complexity). - */ - maxcomplexity: false, - - /** - * This option suppresses warnings about variable shadowing i.e. declaring a - * variable that had been already declared somewhere in the outer scope. - * - * - "inner" - check for variables defined in the same scope only - * - "outer" - check for variables defined in outer scopes as well - * - false - same as inner - * - true - allow variable shadowing - */ - shadow : false, - - /** - * This option requires the code to run in ECMAScript 5's strict mode. - * [Strict mode](https://developer.mozilla.org/en/JavaScript/Strict_mode) - * is a way to opt in to a restricted variant of JavaScript. Strict mode - * eliminates some JavaScript pitfalls that didn't cause errors by changing - * them to produce errors. It also fixes mistakes that made it difficult - * for the JavaScript engines to perform certain optimizations. - * - * - "global" - there must be a `"use strict";` directive at global level - * - "implied" - lint the code as if there is the `"use strict";` directive - * - false - disable warnings about strict mode - * - true - there must be a `"use strict";` directive at function level; - * this is preferable for scripts intended to be loaded in web - * browsers directly because enabling strict mode globally - * could adversely effect other scripts running on the same - * page - */ - strict : true, - - /** - * This option warns when you define and never use your variables. It is very - * useful for general code cleanup, especially when used in addition to - * `undef`. - * - * // jshint unused:true - * - * function test(a, b) { - * var c, d = 2; - * - * return a + d; - * } - * - * test(1, 2); - * - * // Line 3: 'b' was defined but never used. - * // Line 4: 'c' was defined but never used. - * - * In addition to that, this option will warn you about unused global - * variables declared via the `global` directive. - * - * When set to `true`, unused parameters that are followed by a used - * parameter will not produce warnings. This option can be set to `vars` to - * only check for variables, not function parameters, or `strict` to check - * all variables and parameters. - */ - unused : true, - - /** - * This option prohibits the use of a variable before it was defined. - * JavaScript has function scope only and, in addition to that, all variables - * are always moved—or hoisted— to the top of the function. This behavior can - * lead to some very nasty bugs and that's why it is safer to always use - * variable only after they have been explicitly defined. - * - * Setting this option to "nofunc" will allow function declarations to be - * ignored. - * - * For more in-depth understanding of scoping and hoisting in JavaScript, - * read [JavaScript Scoping and - * Hoisting](http://www.adequatelygood.com/2010/2/JavaScript-Scoping-and-Hoisting) - * by Ben Cherry. - */ - latedef : false, - - ignore : false, // start/end ignoring lines of code, bypassing the lexer - // start - start ignoring lines, including the current line - // end - stop ignoring lines, starting on the next line - // line - ignore warnings / errors for just a single line - // (this option does not bypass the lexer) - - ignoreDelimiters: false, // array of start/end delimiters used to ignore - // certain chunks from code - - /** - * This option is used to specify the ECMAScript version to which the code - * must adhere. It can assume one of the following values: - * - `3` - If you need your program to be executable - * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy - * JavaScript environments - * - `5` - To enable syntax first defined in [the ECMAScript 5.1 - * specification](http://www.ecma-international.org/ecma-262/5.1/index.html). - * This includes allowing reserved keywords as object properties. - * - `6` - To tell JSHint that your code uses [ECMAScript - * 6](http://www.ecma-international.org/ecma-262/6.0/index.html) specific - * syntax. Note that not all browsers implement them. - */ - esversion: 5 -}; - -// These are JSHint boolean options which are shared with JSLint -// where the definition in JSHint is opposite JSLint -exports.inverted = { - bitwise : true, - forin : true, - newcap : true, - plusplus: true, - regexp : true, - undef : true, - - // Inverted and renamed, use JSHint name here - eqeqeq : true, - strict : true -}; - -exports.validNames = Object.keys(exports.val) - .concat(Object.keys(exports.bool.relaxing)) - .concat(Object.keys(exports.bool.enforcing)) - .concat(Object.keys(exports.bool.obsolete)) - .concat(Object.keys(exports.bool.environments)); - -// These are JSHint boolean options which are shared with JSLint -// where the name has been changed but the effect is unchanged -exports.renamed = { - eqeq : "eqeqeq", - windows: "wsh", - sloppy : "strict" -}; - -exports.removed = { - nomen: true, - onevar: true, - passfail: true, - white: true, - gcl: true, - smarttabs: true, - trailing: true -}; - -// Add options here which should not be automatically enforced by -// `enforceall`. -exports.noenforceall = { - varstmt: true, - strict: true -}; - -},{}],17:[function(require,module,exports){ -/* - * Regular expressions. Some of these are stupidly long. - */ - -/*jshint maxlen:1000 */ - -"use strict"; - -// Unsafe comment or string (ax) -exports.unsafeString = - /@cc|<\/?|script|\]\s*\]|<\s*!|</i; - -// Unsafe characters that are silently deleted by one or more browsers (cx) -exports.unsafeChars = - /[\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/; - -// Characters in strings that need escaping (nx and nxg) -exports.needEsc = - /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/; - -exports.needEscGlobal = - /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g; - -// Star slash (lx) -exports.starSlash = /\*\//; - -// Identifier (ix) -exports.identifier = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/; - -// JavaScript URL (jx) -exports.javascriptURL = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i; - -// Catches /* falls through */ comments (ft) -exports.fallsThrough = /^\s*falls?\sthrough\s*$/; - -// very conservative rule (eg: only one space between the start of the comment and the first character) -// to relax the maxlen option -exports.maxlenException = /^(?:(?:\/\/|\/\*|\*) ?)?[^ ]+$/; - -},{}],18:[function(require,module,exports){ -"use strict"; - -var _ = require("lodash"); -var events = require("events"); - -// Used to denote membership in lookup tables (a primitive value such as `true` -// would be silently rejected for the property name "__proto__" in some -// environments) -var marker = {}; - -/** - * Creates a scope manager that handles variables and labels, storing usages - * and resolving when variables are used and undefined - */ -var scopeManager = function(state, predefined, exported, declared) { - - var _current; - var _scopeStack = []; - - function _newScope(type) { - _current = { - "(labels)": Object.create(null), - "(usages)": Object.create(null), - "(breakLabels)": Object.create(null), - "(parent)": _current, - "(type)": type, - "(params)": (type === "functionparams" || type === "catchparams") ? [] : null - }; - _scopeStack.push(_current); - } - - _newScope("global"); - _current["(predefined)"] = predefined; - - var _currentFunctBody = _current; // this is the block after the params = function - - var usedPredefinedAndGlobals = Object.create(null); - var impliedGlobals = Object.create(null); - var unuseds = []; - var emitter = new events.EventEmitter(); - - function warning(code, token) { - emitter.emit("warning", { - code: code, - token: token, - data: _.slice(arguments, 2) - }); - } - - function error(code, token) { - emitter.emit("warning", { - code: code, - token: token, - data: _.slice(arguments, 2) - }); - } - - function _setupUsages(labelName) { - if (!_current["(usages)"][labelName]) { - _current["(usages)"][labelName] = { - "(modified)": [], - "(reassigned)": [], - "(tokens)": [] - }; - } - } - - var _getUnusedOption = function(unused_opt) { - if (unused_opt === undefined) { - unused_opt = state.option.unused; - } - - if (unused_opt === true) { - unused_opt = "last-param"; - } - - return unused_opt; - }; - - var _warnUnused = function(name, tkn, type, unused_opt) { - var line = tkn.line; - var chr = tkn.from; - var raw_name = tkn.raw_text || name; - - unused_opt = _getUnusedOption(unused_opt); - - var warnable_types = { - "vars": ["var"], - "last-param": ["var", "param"], - "strict": ["var", "param", "last-param"] - }; - - if (unused_opt) { - if (warnable_types[unused_opt] && warnable_types[unused_opt].indexOf(type) !== -1) { - warning("W098", { line: line, from: chr }, raw_name); - } - } - - // inconsistent - see gh-1894 - if (unused_opt || type === "var") { - unuseds.push({ - name: name, - line: line, - character: chr - }); - } - }; - - /** - * Checks the current scope for unused identifiers - */ - function _checkForUnused() { - // function params are handled specially - // assume that parameters are the only thing declared in the param scope - if (_current["(type)"] === "functionparams") { - _checkParams(); - return; - } - var curentLabels = _current["(labels)"]; - for (var labelName in curentLabels) { - if (curentLabels[labelName]) { - if (curentLabels[labelName]["(type)"] !== "exception" && - curentLabels[labelName]["(unused)"]) { - _warnUnused(labelName, curentLabels[labelName]["(token)"], "var"); - } - } - } - } - - /** - * Checks the current scope for unused parameters - * Must be called in a function parameter scope - */ - function _checkParams() { - var params = _current["(params)"]; - - if (!params) { - return; - } - - var param = params.pop(); - var unused_opt; - - while (param) { - var label = _current["(labels)"][param]; - - unused_opt = _getUnusedOption(state.funct["(unusedOption)"]); - - // 'undefined' is a special case for (function(window, undefined) { ... })(); - // patterns. - if (param === "undefined") - return; - - if (label["(unused)"]) { - _warnUnused(param, label["(token)"], "param", state.funct["(unusedOption)"]); - } else if (unused_opt === "last-param") { - return; - } - - param = params.pop(); - } - } - - /** - * Finds the relevant label's scope, searching from nearest outwards - * @returns {Object} the scope the label was found in - */ - function _getLabel(labelName) { - for (var i = _scopeStack.length - 1 ; i >= 0; --i) { - var scopeLabels = _scopeStack[i]["(labels)"]; - if (scopeLabels[labelName]) { - return scopeLabels; - } - } - } - - function usedSoFarInCurrentFunction(labelName) { - // used so far in this whole function and any sub functions - for (var i = _scopeStack.length - 1; i >= 0; i--) { - var current = _scopeStack[i]; - if (current["(usages)"][labelName]) { - return current["(usages)"][labelName]; - } - if (current === _currentFunctBody) { - break; - } - } - return false; - } - - function _checkOuterShadow(labelName, token) { - - // only check if shadow is outer - if (state.option.shadow !== "outer") { - return; - } - - var isGlobal = _currentFunctBody["(type)"] === "global", - isNewFunction = _current["(type)"] === "functionparams"; - - var outsideCurrentFunction = !isGlobal; - for (var i = 0; i < _scopeStack.length; i++) { - var stackItem = _scopeStack[i]; - - if (!isNewFunction && _scopeStack[i + 1] === _currentFunctBody) { - outsideCurrentFunction = false; - } - if (outsideCurrentFunction && stackItem["(labels)"][labelName]) { - warning("W123", token, labelName); - } - if (stackItem["(breakLabels)"][labelName]) { - warning("W123", token, labelName); - } - } - } - - function _latedefWarning(type, labelName, token) { - if (state.option.latedef) { - // if either latedef is strict and this is a function - // or this is not a function - if ((state.option.latedef === true && type === "function") || - type !== "function") { - warning("W003", token, labelName); - } - } - } - - var scopeManagerInst = { - - on: function(names, listener) { - names.split(" ").forEach(function(name) { - emitter.on(name, listener); - }); - }, - - isPredefined: function(labelName) { - return !this.has(labelName) && _.has(_scopeStack[0]["(predefined)"], labelName); - }, - - /** - * Tell the manager we are entering a new block of code - * @param {string} [type] - The type of the block. Valid values are - * "functionparams", "catchparams" and - * "functionouter" - */ - stack: function(type) { - var previousScope = _current; - _newScope(type); - - if (!type && previousScope["(type)"] === "functionparams") { - - _current["(isFuncBody)"] = true; - _current["(context)"] = _currentFunctBody; - _currentFunctBody = _current; - } - }, - - unstack: function() { - // jshint proto: true - var subScope = _scopeStack.length > 1 ? _scopeStack[_scopeStack.length - 2] : null; - var isUnstackingFunctionBody = _current === _currentFunctBody, - isUnstackingFunctionParams = _current["(type)"] === "functionparams", - isUnstackingFunctionOuter = _current["(type)"] === "functionouter"; - - var i, j; - var currentUsages = _current["(usages)"]; - var currentLabels = _current["(labels)"]; - var usedLabelNameList = Object.keys(currentUsages); - - if (currentUsages.__proto__ && usedLabelNameList.indexOf("__proto__") === -1) { - usedLabelNameList.push("__proto__"); - } - - for (i = 0; i < usedLabelNameList.length; i++) { - var usedLabelName = usedLabelNameList[i]; - - var usage = currentUsages[usedLabelName]; - var usedLabel = currentLabels[usedLabelName]; - if (usedLabel) { - var usedLabelType = usedLabel["(type)"]; - var isImmutable = usedLabelType === "const" || usedLabelType === "import"; - - if (usedLabel["(useOutsideOfScope)"] && !state.option.funcscope) { - var usedTokens = usage["(tokens)"]; - if (usedTokens) { - for (j = 0; j < usedTokens.length; j++) { - // Keep the consistency of https://github.com/jshint/jshint/issues/2409 - if (usedLabel["(function)"] === usedTokens[j]["(function)"]) { - error("W038", usedTokens[j], usedLabelName); - } - } - } - } - - // mark the label used - _current["(labels)"][usedLabelName]["(unused)"] = false; - - // check for modifying a const - if (isImmutable && usage["(modified)"]) { - for (j = 0; j < usage["(modified)"].length; j++) { - error("E013", usage["(modified)"][j], usedLabelName); - } - } - - // check for re-assigning a function declaration - if ((usedLabelType === "function" || usedLabelType === "class") && - usage["(reassigned)"]) { - for (j = 0; j < usage["(reassigned)"].length; j++) { - if (!usage["(reassigned)"][j].ignoreW021) { - warning("W021", usage["(reassigned)"][j], usedLabelName, usedLabelType); - } - } - } - continue; - } - - if (isUnstackingFunctionOuter) { - state.funct["(isCapturing)"] = true; - } - - if (subScope) { - // not exiting the global scope, so copy the usage down in case its an out of scope usage - if (!subScope["(usages)"][usedLabelName]) { - subScope["(usages)"][usedLabelName] = usage; - if (isUnstackingFunctionBody) { - subScope["(usages)"][usedLabelName]["(onlyUsedSubFunction)"] = true; - } - } else { - var subScopeUsage = subScope["(usages)"][usedLabelName]; - subScopeUsage["(modified)"] = subScopeUsage["(modified)"].concat(usage["(modified)"]); - subScopeUsage["(tokens)"] = subScopeUsage["(tokens)"].concat(usage["(tokens)"]); - subScopeUsage["(reassigned)"] = - subScopeUsage["(reassigned)"].concat(usage["(reassigned)"]); - } - } else { - // this is exiting global scope, so we finalise everything here - we are at the end of the file - if (typeof _current["(predefined)"][usedLabelName] === "boolean") { - - // remove the declared token, so we know it is used - delete declared[usedLabelName]; - - // note it as used so it can be reported - usedPredefinedAndGlobals[usedLabelName] = marker; - - // check for re-assigning a read-only (set to false) predefined - if (_current["(predefined)"][usedLabelName] === false && usage["(reassigned)"]) { - for (j = 0; j < usage["(reassigned)"].length; j++) { - if (!usage["(reassigned)"][j].ignoreW020) { - warning("W020", usage["(reassigned)"][j]); - } - } - } - } - else { - // label usage is not predefined and we have not found a declaration - // so report as undeclared - if (usage["(tokens)"]) { - for (j = 0; j < usage["(tokens)"].length; j++) { - var undefinedToken = usage["(tokens)"][j]; - // if its not a forgiven undefined (e.g. typof x) - if (!undefinedToken.forgiveUndef) { - // if undef is on and undef was on when the token was defined - if (state.option.undef && !undefinedToken.ignoreUndef) { - warning("W117", undefinedToken, usedLabelName); - } - if (impliedGlobals[usedLabelName]) { - impliedGlobals[usedLabelName].line.push(undefinedToken.line); - } else { - impliedGlobals[usedLabelName] = { - name: usedLabelName, - line: [undefinedToken.line] - }; - } - } - } - } - } - } - } - - // if exiting the global scope, we can warn about declared globals that haven't been used yet - if (!subScope) { - Object.keys(declared) - .forEach(function(labelNotUsed) { - _warnUnused(labelNotUsed, declared[labelNotUsed], "var"); - }); - } - - // If this is not a function boundary, transfer function-scoped labels to - // the parent block (a rough simulation of variable hoisting). Previously - // existing labels in the parent block should take precedence so that things and stuff. - if (subScope && !isUnstackingFunctionBody && - !isUnstackingFunctionParams && !isUnstackingFunctionOuter) { - var labelNames = Object.keys(currentLabels); - for (i = 0; i < labelNames.length; i++) { - - var defLabelName = labelNames[i]; - var defLabel = currentLabels[defLabelName]; - - if (!defLabel["(blockscoped)"] && defLabel["(type)"] !== "exception") { - var shadowed = subScope["(labels)"][defLabelName]; - - // Do not overwrite a label if it exists in the parent scope - // because it is shared by adjacent blocks. Copy the `unused` - // property so that any references found within the current block - // are counted toward that higher-level declaration. - if (shadowed) { - shadowed["(unused)"] &= defLabel["(unused)"]; - - // "Hoist" the variable to the parent block, decorating the label - // so that future references, though technically valid, can be - // reported as "out-of-scope" in the absence of the `funcscope` - // option. - } else { - defLabel["(useOutsideOfScope)"] = - // Do not warn about out-of-scope usages in the global scope - _currentFunctBody["(type)"] !== "global" && - // When a higher scope contains a binding for the label, the - // label is a re-declaration and should not prompt "used - // out-of-scope" warnings. - !this.funct.has(defLabelName, { excludeCurrent: true }); - - subScope["(labels)"][defLabelName] = defLabel; - } - - delete currentLabels[defLabelName]; - } - } - } - - _checkForUnused(); - - _scopeStack.pop(); - if (isUnstackingFunctionBody) { - _currentFunctBody = _scopeStack[_.findLastIndex(_scopeStack, function(scope) { - // if function or if global (which is at the bottom so it will only return true if we call back) - return scope["(isFuncBody)"] || scope["(type)"] === "global"; - })]; - } - - _current = subScope; - }, - - /** - * Add a param to the current scope - * @param {string} labelName - * @param {Token} token - * @param {string} [type="param"] param type - */ - addParam: function(labelName, token, type) { - type = type || "param"; - - if (type === "exception") { - // if defined in the current function - var previouslyDefinedLabelType = this.funct.labeltype(labelName); - if (previouslyDefinedLabelType && previouslyDefinedLabelType !== "exception") { - // and has not been used yet in the current function scope - if (!state.option.node) { - warning("W002", state.tokens.next, labelName); - } - } - } - - // The variable was declared in the current scope - if (_.has(_current["(labels)"], labelName)) { - _current["(labels)"][labelName].duplicated = true; - - // The variable was declared in an outer scope - } else { - // if this scope has the variable defined, it's a re-definition error - _checkOuterShadow(labelName, token, type); - - _current["(labels)"][labelName] = { - "(type)" : type, - "(token)": token, - "(unused)": true }; - - _current["(params)"].push(labelName); - } - - if (_.has(_current["(usages)"], labelName)) { - var usage = _current["(usages)"][labelName]; - // if its in a sub function it is not necessarily an error, just latedef - if (usage["(onlyUsedSubFunction)"]) { - _latedefWarning(type, labelName, token); - } else { - // this is a clear illegal usage for block scoped variables - warning("E056", token, labelName, type); - } - } - }, - - validateParams: function() { - // This method only concerns errors for function parameters - if (_currentFunctBody["(type)"] === "global") { - return; - } - - var isStrict = state.isStrict(); - var currentFunctParamScope = _currentFunctBody["(parent)"]; - - if (!currentFunctParamScope["(params)"]) { - return; - } - - currentFunctParamScope["(params)"].forEach(function(labelName) { - var label = currentFunctParamScope["(labels)"][labelName]; - - if (label && label.duplicated) { - if (isStrict) { - warning("E011", label["(token)"], labelName); - } else if (state.option.shadow !== true) { - warning("W004", label["(token)"], labelName); - } - } - }); - }, - - getUsedOrDefinedGlobals: function() { - // jshint proto: true - var list = Object.keys(usedPredefinedAndGlobals); - - // If `__proto__` is used as a global variable name, its entry in the - // lookup table may not be enumerated by `Object.keys` (depending on the - // environment). - if (usedPredefinedAndGlobals.__proto__ === marker && - list.indexOf("__proto__") === -1) { - list.push("__proto__"); - } - - return list; - }, - - /** - * Gets an array of implied globals - * @returns {Array.<{ name: string, line: Array.<number>}>} - */ - getImpliedGlobals: function() { - // jshint proto: true - var values = _.values(impliedGlobals); - var hasProto = false; - - // If `__proto__` is an implied global variable, its entry in the lookup - // table may not be enumerated by `_.values` (depending on the - // environment). - if (impliedGlobals.__proto__) { - hasProto = values.some(function(value) { - return value.name === "__proto__"; - }); - - if (!hasProto) { - values.push(impliedGlobals.__proto__); - } - } - - return values; - }, - - /** - * Returns a list of unused variables - * @returns {Array} - */ - getUnuseds: function() { - return unuseds; - }, - - has: function(labelName) { - return Boolean(_getLabel(labelName)); - }, - - labeltype: function(labelName) { - // returns a labels type or null if not present - var scopeLabels = _getLabel(labelName); - if (scopeLabels) { - return scopeLabels[labelName]["(type)"]; - } - return null; - }, - - /** - * for the exported options, indicating a variable is used outside the file - */ - addExported: function(labelName) { - var globalLabels = _scopeStack[0]["(labels)"]; - if (_.has(declared, labelName)) { - // remove the declared token, so we know it is used - delete declared[labelName]; - } else if (_.has(globalLabels, labelName)) { - globalLabels[labelName]["(unused)"] = false; - } else { - for (var i = 1; i < _scopeStack.length; i++) { - var scope = _scopeStack[i]; - // if `scope.(type)` is not defined, it is a block scope - if (!scope["(type)"]) { - if (_.has(scope["(labels)"], labelName) && - !scope["(labels)"][labelName]["(blockscoped)"]) { - scope["(labels)"][labelName]["(unused)"] = false; - return; - } - } else { - break; - } - } - exported[labelName] = true; - } - }, - - /** - * Mark an indentifier as es6 module exported - */ - setExported: function(labelName, token) { - this.block.use(labelName, token); - }, - - initialize: function(labelName) { - if (_current["(labels)"][labelName]) { - _current["(labels)"][labelName]["(initialized)"] = true; - } - }, - - /** - * adds an indentifier to the relevant current scope and creates warnings/errors as necessary - * @param {string} labelName - * @param {Object} opts - * @param {String} opts.type - the type of the label e.g. "param", "var", "let, "const", "import", "function" - * @param {Token} opts.token - the token pointing at the declaration - * @param {boolean} opts.initialized - whether the binding should be created in an "initialized" state. - */ - addlabel: function(labelName, opts) { - - var type = opts.type; - var token = opts.token; - var isblockscoped = type === "let" || type === "const" || - type === "class" || type === "import"; - var ishoisted = type === "function" || type === "import"; - var isexported = (isblockscoped ? _current : _currentFunctBody)["(type)"] === "global" && - _.has(exported, labelName); - - // outer shadow check (inner is only on non-block scoped) - _checkOuterShadow(labelName, token, type); - - if (isblockscoped) { - - var declaredInCurrentScope = _current["(labels)"][labelName]; - // for block scoped variables, params are seen in the current scope as the root function - // scope, so check these too. - if (!declaredInCurrentScope && _current === _currentFunctBody && - _current["(type)"] !== "global") { - declaredInCurrentScope = !!_currentFunctBody["(parent)"]["(labels)"][labelName]; - } - - // if its not already defined (which is an error, so ignore) and is used in TDZ - if (!declaredInCurrentScope && _current["(usages)"][labelName]) { - var usage = _current["(usages)"][labelName]; - // if its in a sub function it is not necessarily an error, just latedef - if (usage["(onlyUsedSubFunction)"] || ishoisted) { - _latedefWarning(type, labelName, token); - } else if (!ishoisted) { - // this is a clear illegal usage for block scoped variables - warning("E056", token, labelName, type); - } - } - - // if this scope has the variable defined, its a re-definition error - if (declaredInCurrentScope) { - warning("E011", token, labelName); - } - else if (state.option.shadow === "outer") { - - // if shadow is outer, for block scope we want to detect any shadowing within this function - if (scopeManagerInst.funct.has(labelName)) { - warning("W004", token, labelName); - } - } - - scopeManagerInst.block.add( - labelName, type, token, !isexported, opts.initialized - ); - - } else { - - var declaredInCurrentFunctionScope = scopeManagerInst.funct.has(labelName); - - // check for late definition, ignore if already declared - if (!declaredInCurrentFunctionScope && usedSoFarInCurrentFunction(labelName)) { - _latedefWarning(type, labelName, token); - } - - // defining with a var or a function when a block scope variable of the same name - // is in scope is an error - if (scopeManagerInst.funct.has(labelName, { onlyBlockscoped: true })) { - warning("E011", token, labelName); - } else if (state.option.shadow !== true) { - // now since we didn't get any block scope variables, test for var/function - // shadowing - if (declaredInCurrentFunctionScope && labelName !== "__proto__") { - - // see https://github.com/jshint/jshint/issues/2400 - if (_currentFunctBody["(type)"] !== "global") { - warning("W004", token, labelName); - } - } - } - - scopeManagerInst.funct.add(labelName, type, token, !isexported); - - if (_currentFunctBody["(type)"] === "global" && !state.impliedClosure()) { - usedPredefinedAndGlobals[labelName] = marker; - } - } - }, - - funct: { - /** - * Returns the label type given certain options - * @param labelName - * @param {Object=} options - * @param {Boolean=} options.onlyBlockscoped - only include block scoped labels - * @param {Boolean=} options.excludeParams - exclude the param scope - * @param {Boolean=} options.excludeCurrent - exclude the current scope - * @returns {String} - */ - labeltype: function(labelName, options) { - var onlyBlockscoped = options && options.onlyBlockscoped; - var excludeParams = options && options.excludeParams; - var currentScopeIndex = _scopeStack.length - (options && options.excludeCurrent ? 2 : 1); - for (var i = currentScopeIndex; i >= 0; i--) { - var current = _scopeStack[i]; - if (current["(labels)"][labelName] && - (!onlyBlockscoped || current["(labels)"][labelName]["(blockscoped)"])) { - return current["(labels)"][labelName]["(type)"]; - } - var scopeCheck = excludeParams ? _scopeStack[ i - 1 ] : current; - if (scopeCheck && scopeCheck["(type)"] === "functionparams") { - return null; - } - } - return null; - }, - /** - * Returns if a break label exists in the function scope - * @param {string} labelName - * @returns {boolean} - */ - hasBreakLabel: function(labelName) { - for (var i = _scopeStack.length - 1; i >= 0; i--) { - var current = _scopeStack[i]; - - if (current["(breakLabels)"][labelName]) { - return true; - } - if (current["(type)"] === "functionparams") { - return false; - } - } - return false; - }, - /** - * Returns if the label is in the current function scope - * See scopeManager.funct.labelType for options - */ - has: function(labelName, options) { - return Boolean(this.labeltype(labelName, options)); - }, - - /** - * Adds a new function scoped variable - * see block.add for block scoped - */ - add: function(labelName, type, tok, unused) { - _current["(labels)"][labelName] = { - "(type)" : type, - "(token)": tok, - "(blockscoped)": false, - "(function)": _currentFunctBody, - "(unused)": unused }; - } - }, - - block: { - - /** - * is the current block global? - * @returns Boolean - */ - isGlobal: function() { - return _current["(type)"] === "global"; - }, - - use: function(labelName, token) { - - // if resolves to current function params, then do not store usage just resolve - // this is because function(a) { var a; a = a; } will resolve to the param, not - // to the unset var - // first check the param is used - var paramScope = _currentFunctBody["(parent)"]; - if (paramScope && paramScope["(labels)"][labelName] && - paramScope["(labels)"][labelName]["(type)"] === "param") { - - // then check its not declared by a block scope variable - if (!scopeManagerInst.funct.has(labelName, - { excludeParams: true, onlyBlockscoped: true })) { - paramScope["(labels)"][labelName]["(unused)"] = false; - } - } - - if (token && (state.ignored.W117 || state.option.undef === false)) { - token.ignoreUndef = true; - } - - _setupUsages(labelName); - - _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false; - - if (token) { - token["(function)"] = _currentFunctBody; - _current["(usages)"][labelName]["(tokens)"].push(token); - } - - // blockscoped vars can't be used within their initializer (TDZ) - var label = _current["(labels)"][labelName]; - if (label && label["(blockscoped)"] && !label["(initialized)"]) { - error("E056", token, labelName, label["(type)"]); - } - }, - - reassign: function(labelName, token) { - token.ignoreW020 = state.ignored.W020; - token.ignoreW021 = state.ignored.W021; - - this.modify(labelName, token); - - _current["(usages)"][labelName]["(reassigned)"].push(token); - }, - - modify: function(labelName, token) { - - _setupUsages(labelName); - - _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false; - _current["(usages)"][labelName]["(modified)"].push(token); - }, - - /** - * Adds a new variable - */ - add: function(labelName, type, tok, unused, initialized) { - _current["(labels)"][labelName] = { - "(type)" : type, - "(token)": tok, - "(initialized)": !!initialized, - "(blockscoped)": true, - "(unused)": unused }; - }, - - addBreakLabel: function(labelName, opts) { - var token = opts.token; - if (scopeManagerInst.funct.hasBreakLabel(labelName)) { - warning("E011", token, labelName); - } - else if (state.option.shadow === "outer") { - if (scopeManagerInst.funct.has(labelName)) { - warning("W004", token, labelName); - } else { - _checkOuterShadow(labelName, token); - } - } - _current["(breakLabels)"][labelName] = token; - } - } - }; - return scopeManagerInst; -}; - -module.exports = scopeManager; - -},{"events":5,"lodash":12}],19:[function(require,module,exports){ -"use strict"; -var NameStack = require("./name-stack.js"); - -var state = { - syntax: {}, - - /** - * Determine if the code currently being linted is strict mode code. - * - * @returns {boolean} - */ - isStrict: function() { - return this.directive["use strict"] || this.inClassBody || - this.option.module || this.option.strict === "implied"; - }, - - /** - * Determine if the current state warrants a warning for statements outside - * of strict mode code. - * - * While emitting warnings based on function scope would be more intuitive - * (and less noisy), JSHint observes statement-based semantics in order to - * preserve legacy behavior. - * - * This method does not take the state of the parser into account, making no - * distinction between global code and function code. Because the "missing - * 'use strict'" warning is *also* reported at function boundaries, this - * function interprets `strict` option values `true` and `undefined` as - * equivalent. - */ - stmtMissingStrict: function() { - if (this.option.strict === "global") { - return true; - } - - if (this.option.strict === false) { - return false; - } - - if (this.option.globalstrict) { - return true; - } - - return false; - }, - - allowsGlobalUsd: function() { - return this.option.strict === "global" || this.option.globalstrict || - this.option.module || this.impliedClosure(); - }, - - /** - * Determine if the current configuration describes an environment that is - * wrapped in an immediately-invoked function expression prior to evaluation. - * - * @returns {boolean} - */ - impliedClosure: function() { - return this.option.node || this.option.phantom || this.option.browserify; - }, - - // Assumption: chronologically ES3 < ES5 < ES6 < Moz - - inMoz: function() { - return this.option.moz; - }, - - /** - * @param {boolean} strict - When `true`, only consider ES6 when in - * "esversion: 6" code. - */ - inES6: function(strict) { - if (strict) { - return this.esVersion === 6; - } - return this.option.moz || this.esVersion >= 6; - }, - - /** - * @param {boolean} strict - When `true`, return `true` only when - * esVersion is exactly 5 - */ - inES5: function(strict) { - if (strict) { - return (!this.esVersion || this.esVersion === 5) && !this.option.moz; - } - return !this.esVersion || this.esVersion >= 5 || this.option.moz; - }, - - /** - * Determine the current version of the input language by inspecting the - * value of all ECMAScript-version-related options. This logic is necessary - * to ensure compatibility with deprecated options `es3`, `es5`, and - * `esnext`, and it may be drastically simplified when those options are - * removed. - * - * @returns {string|null} - the name of any incompatible option detected, - * `null` otherwise - */ - inferEsVersion: function() { - var badOpt = null; - - if (this.option.esversion) { - if (this.option.es3) { - badOpt = "es3"; - } else if (this.option.es5) { - badOpt = "es5"; - } else if (this.option.esnext) { - badOpt = "esnext"; - } - - if (badOpt) { - return badOpt; - } - - if (this.option.esversion === 2015) { - this.esVersion = 6; - } else { - this.esVersion = this.option.esversion; - } - } else if (this.option.es3) { - this.esVersion = 3; - } else if (this.option.esnext) { - this.esVersion = 6; - } - - return null; - }, - - reset: function() { - this.tokens = { - prev: null, - next: null, - curr: null - }; - - this.option = {}; - this.esVersion = 5; - this.funct = null; - this.ignored = {}; - this.directive = {}; - this.jsonMode = false; - this.jsonWarnings = []; - this.lines = []; - this.tab = ""; - this.cache = {}; // Node.JS doesn't have Map. Sniff. - this.ignoredLines = {}; - this.forinifcheckneeded = false; - this.nameStack = new NameStack(); - this.inClassBody = false; - } -}; - -exports.state = state; - -},{"./name-stack.js":15}],20:[function(require,module,exports){ -"use strict"; - -exports.register = function(linter) { - // Check for properties named __proto__. This special property was - // deprecated and then re-introduced for ES6. - - linter.on("Identifier", function style_scanProto(data) { - if (linter.getOption("proto")) { - return; - } - - if (data.name === "__proto__") { - linter.warn("W103", { - line: data.line, - char: data.char, - data: [ data.name, "6" ] - }); - } - }); - - // Check for properties named __iterator__. This is a special property - // available only in browsers with JavaScript 1.7 implementation, but - // it is deprecated for ES6 - - linter.on("Identifier", function style_scanIterator(data) { - if (linter.getOption("iterator")) { - return; - } - - if (data.name === "__iterator__") { - linter.warn("W103", { - line: data.line, - char: data.char, - data: [ data.name ] - }); - } - }); - - // Check that all identifiers are using camelCase notation. - // Exceptions: names like MY_VAR and _myVar. - - linter.on("Identifier", function style_scanCamelCase(data) { - if (!linter.getOption("camelcase")) { - return; - } - - if (data.name.replace(/^_+|_+$/g, "").indexOf("_") > -1 && !data.name.match(/^[A-Z0-9_]*$/)) { - linter.warn("W106", { - line: data.line, - char: data.char, - data: [ data.name ] - }); - } - }); - - // Enforce consistency in style of quoting. - - linter.on("String", function style_scanQuotes(data) { - var quotmark = linter.getOption("quotmark"); - var code; - - if (!quotmark) { - return; - } - - // If quotmark is set to 'single' warn about all double-quotes. - - if (quotmark === "single" && data.quote !== "'") { - code = "W109"; - } - - // If quotmark is set to 'double' warn about all single-quotes. - - if (quotmark === "double" && data.quote !== "\"") { - code = "W108"; - } - - // If quotmark is set to true, remember the first quotation style - // and then warn about all others. - - if (quotmark === true) { - if (!linter.getCache("quotmark")) { - linter.setCache("quotmark", data.quote); - } - - if (linter.getCache("quotmark") !== data.quote) { - code = "W110"; - } - } - - if (code) { - linter.warn(code, { - line: data.line, - char: data.char, - }); - } - }); - - linter.on("Number", function style_scanNumbers(data) { - if (data.value.charAt(0) === ".") { - // Warn about a leading decimal point. - linter.warn("W008", { - line: data.line, - char: data.char, - data: [ data.value ] - }); - } - - if (data.value.substr(data.value.length - 1) === ".") { - // Warn about a trailing decimal point. - linter.warn("W047", { - line: data.line, - char: data.char, - data: [ data.value ] - }); - } - - if (/^00+/.test(data.value)) { - // Multiple leading zeroes. - linter.warn("W046", { - line: data.line, - char: data.char, - data: [ data.value ] - }); - } - }); - - // Warn about script URLs. - - linter.on("String", function style_scanJavaScriptURLs(data) { - var re = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i; - - if (linter.getOption("scripturl")) { - return; - } - - if (re.test(data.value)) { - linter.warn("W107", { - line: data.line, - char: data.char - }); - } - }); -}; - -},{}],21:[function(require,module,exports){ -// jshint -W001 - -"use strict"; - -// Identifiers provided by the ECMAScript standard. - -exports.reservedVars = { - arguments : false, - NaN : false -}; - -exports.ecmaIdentifiers = { - 3: { - Array : false, - Boolean : false, - Date : false, - decodeURI : false, - decodeURIComponent : false, - encodeURI : false, - encodeURIComponent : false, - Error : false, - "eval" : false, - EvalError : false, - Function : false, - hasOwnProperty : false, - isFinite : false, - isNaN : false, - Math : false, - Number : false, - Object : false, - parseInt : false, - parseFloat : false, - RangeError : false, - ReferenceError : false, - RegExp : false, - String : false, - SyntaxError : false, - TypeError : false, - URIError : false - }, - 5: { - JSON : false - }, - 6: { - ArrayBuffer : false, - DataView : false, - Float32Array : false, - Float64Array : false, - Int8Array : false, - Int16Array : false, - Int32Array : false, - Map : false, - Promise : false, - Proxy : false, - Reflect : false, - Set : false, - Symbol : false, - Uint8Array : false, - Uint16Array : false, - Uint32Array : false, - Uint8ClampledArray : false, - WeakMap : false, - WeakSet : false - } -}; - -// Global variables commonly provided by a web browser environment. - -exports.browser = { - Audio : false, - Blob : false, - addEventListener : false, - applicationCache : false, - atob : false, - blur : false, - btoa : false, - cancelAnimationFrame : false, - CanvasGradient : false, - CanvasPattern : false, - CanvasRenderingContext2D: false, - CSS : false, - clearInterval : false, - clearTimeout : false, - close : false, - closed : false, - Comment : false, - CompositionEvent : false, - CustomEvent : false, - DOMParser : false, - defaultStatus : false, - Document : false, - document : false, - DocumentFragment : false, - Element : false, - ElementTimeControl : false, - Event : false, - event : false, - fetch : false, - File : false, - FileList : false, - FileReader : false, - FormData : false, - focus : false, - frames : false, - getComputedStyle : false, - HTMLElement : false, - HTMLAnchorElement : false, - HTMLBaseElement : false, - HTMLBlockquoteElement: false, - HTMLBodyElement : false, - HTMLBRElement : false, - HTMLButtonElement : false, - HTMLCanvasElement : false, - HTMLCollection : false, - HTMLDirectoryElement : false, - HTMLDivElement : false, - HTMLDListElement : false, - HTMLFieldSetElement : false, - HTMLFontElement : false, - HTMLFormElement : false, - HTMLFrameElement : false, - HTMLFrameSetElement : false, - HTMLHeadElement : false, - HTMLHeadingElement : false, - HTMLHRElement : false, - HTMLHtmlElement : false, - HTMLIFrameElement : false, - HTMLImageElement : false, - HTMLInputElement : false, - HTMLIsIndexElement : false, - HTMLLabelElement : false, - HTMLLayerElement : false, - HTMLLegendElement : false, - HTMLLIElement : false, - HTMLLinkElement : false, - HTMLMapElement : false, - HTMLMenuElement : false, - HTMLMetaElement : false, - HTMLModElement : false, - HTMLObjectElement : false, - HTMLOListElement : false, - HTMLOptGroupElement : false, - HTMLOptionElement : false, - HTMLParagraphElement : false, - HTMLParamElement : false, - HTMLPreElement : false, - HTMLQuoteElement : false, - HTMLScriptElement : false, - HTMLSelectElement : false, - HTMLStyleElement : false, - HTMLTableCaptionElement: false, - HTMLTableCellElement : false, - HTMLTableColElement : false, - HTMLTableElement : false, - HTMLTableRowElement : false, - HTMLTableSectionElement: false, - HTMLTemplateElement : false, - HTMLTextAreaElement : false, - HTMLTitleElement : false, - HTMLUListElement : false, - HTMLVideoElement : false, - history : false, - Image : false, - Intl : false, - length : false, - localStorage : false, - location : false, - matchMedia : false, - MediaRecorder : false, - MessageChannel : false, - MessageEvent : false, - MessagePort : false, - MouseEvent : false, - moveBy : false, - moveTo : false, - MutationObserver : false, - name : false, - Node : false, - NodeFilter : false, - NodeList : false, - Notification : false, - navigator : false, - onbeforeunload : true, - onblur : true, - onerror : true, - onfocus : true, - onload : true, - onresize : true, - onunload : true, - open : false, - openDatabase : false, - opener : false, - Option : false, - parent : false, - performance : false, - print : false, - Range : false, - requestAnimationFrame : false, - removeEventListener : false, - resizeBy : false, - resizeTo : false, - screen : false, - scroll : false, - scrollBy : false, - scrollTo : false, - sessionStorage : false, - setInterval : false, - setTimeout : false, - SharedWorker : false, - status : false, - Storage : false, - SVGAElement : false, - SVGAltGlyphDefElement: false, - SVGAltGlyphElement : false, - SVGAltGlyphItemElement: false, - SVGAngle : false, - SVGAnimateColorElement: false, - SVGAnimateElement : false, - SVGAnimateMotionElement: false, - SVGAnimateTransformElement: false, - SVGAnimatedAngle : false, - SVGAnimatedBoolean : false, - SVGAnimatedEnumeration: false, - SVGAnimatedInteger : false, - SVGAnimatedLength : false, - SVGAnimatedLengthList: false, - SVGAnimatedNumber : false, - SVGAnimatedNumberList: false, - SVGAnimatedPathData : false, - SVGAnimatedPoints : false, - SVGAnimatedPreserveAspectRatio: false, - SVGAnimatedRect : false, - SVGAnimatedString : false, - SVGAnimatedTransformList: false, - SVGAnimationElement : false, - SVGCSSRule : false, - SVGCircleElement : false, - SVGClipPathElement : false, - SVGColor : false, - SVGColorProfileElement: false, - SVGColorProfileRule : false, - SVGComponentTransferFunctionElement: false, - SVGCursorElement : false, - SVGDefsElement : false, - SVGDescElement : false, - SVGDocument : false, - SVGElement : false, - SVGElementInstance : false, - SVGElementInstanceList: false, - SVGEllipseElement : false, - SVGExternalResourcesRequired: false, - SVGFEBlendElement : false, - SVGFEColorMatrixElement: false, - SVGFEComponentTransferElement: false, - SVGFECompositeElement: false, - SVGFEConvolveMatrixElement: false, - SVGFEDiffuseLightingElement: false, - SVGFEDisplacementMapElement: false, - SVGFEDistantLightElement: false, - SVGFEFloodElement : false, - SVGFEFuncAElement : false, - SVGFEFuncBElement : false, - SVGFEFuncGElement : false, - SVGFEFuncRElement : false, - SVGFEGaussianBlurElement: false, - SVGFEImageElement : false, - SVGFEMergeElement : false, - SVGFEMergeNodeElement: false, - SVGFEMorphologyElement: false, - SVGFEOffsetElement : false, - SVGFEPointLightElement: false, - SVGFESpecularLightingElement: false, - SVGFESpotLightElement: false, - SVGFETileElement : false, - SVGFETurbulenceElement: false, - SVGFilterElement : false, - SVGFilterPrimitiveStandardAttributes: false, - SVGFitToViewBox : false, - SVGFontElement : false, - SVGFontFaceElement : false, - SVGFontFaceFormatElement: false, - SVGFontFaceNameElement: false, - SVGFontFaceSrcElement: false, - SVGFontFaceUriElement: false, - SVGForeignObjectElement: false, - SVGGElement : false, - SVGGlyphElement : false, - SVGGlyphRefElement : false, - SVGGradientElement : false, - SVGHKernElement : false, - SVGICCColor : false, - SVGImageElement : false, - SVGLangSpace : false, - SVGLength : false, - SVGLengthList : false, - SVGLineElement : false, - SVGLinearGradientElement: false, - SVGLocatable : false, - SVGMPathElement : false, - SVGMarkerElement : false, - SVGMaskElement : false, - SVGMatrix : false, - SVGMetadataElement : false, - SVGMissingGlyphElement: false, - SVGNumber : false, - SVGNumberList : false, - SVGPaint : false, - SVGPathElement : false, - SVGPathSeg : false, - SVGPathSegArcAbs : false, - SVGPathSegArcRel : false, - SVGPathSegClosePath : false, - SVGPathSegCurvetoCubicAbs: false, - SVGPathSegCurvetoCubicRel: false, - SVGPathSegCurvetoCubicSmoothAbs: false, - SVGPathSegCurvetoCubicSmoothRel: false, - SVGPathSegCurvetoQuadraticAbs: false, - SVGPathSegCurvetoQuadraticRel: false, - SVGPathSegCurvetoQuadraticSmoothAbs: false, - SVGPathSegCurvetoQuadraticSmoothRel: false, - SVGPathSegLinetoAbs : false, - SVGPathSegLinetoHorizontalAbs: false, - SVGPathSegLinetoHorizontalRel: false, - SVGPathSegLinetoRel : false, - SVGPathSegLinetoVerticalAbs: false, - SVGPathSegLinetoVerticalRel: false, - SVGPathSegList : false, - SVGPathSegMovetoAbs : false, - SVGPathSegMovetoRel : false, - SVGPatternElement : false, - SVGPoint : false, - SVGPointList : false, - SVGPolygonElement : false, - SVGPolylineElement : false, - SVGPreserveAspectRatio: false, - SVGRadialGradientElement: false, - SVGRect : false, - SVGRectElement : false, - SVGRenderingIntent : false, - SVGSVGElement : false, - SVGScriptElement : false, - SVGSetElement : false, - SVGStopElement : false, - SVGStringList : false, - SVGStylable : false, - SVGStyleElement : false, - SVGSwitchElement : false, - SVGSymbolElement : false, - SVGTRefElement : false, - SVGTSpanElement : false, - SVGTests : false, - SVGTextContentElement: false, - SVGTextElement : false, - SVGTextPathElement : false, - SVGTextPositioningElement: false, - SVGTitleElement : false, - SVGTransform : false, - SVGTransformList : false, - SVGTransformable : false, - SVGURIReference : false, - SVGUnitTypes : false, - SVGUseElement : false, - SVGVKernElement : false, - SVGViewElement : false, - SVGViewSpec : false, - SVGZoomAndPan : false, - Text : false, - TextDecoder : false, - TextEncoder : false, - TimeEvent : false, - top : false, - URL : false, - WebGLActiveInfo : false, - WebGLBuffer : false, - WebGLContextEvent : false, - WebGLFramebuffer : false, - WebGLProgram : false, - WebGLRenderbuffer : false, - WebGLRenderingContext: false, - WebGLShader : false, - WebGLShaderPrecisionFormat: false, - WebGLTexture : false, - WebGLUniformLocation : false, - WebSocket : false, - window : false, - Window : false, - Worker : false, - XDomainRequest : false, - XMLHttpRequest : false, - XMLSerializer : false, - XPathEvaluator : false, - XPathException : false, - XPathExpression : false, - XPathNamespace : false, - XPathNSResolver : false, - XPathResult : false -}; - -exports.devel = { - alert : false, - confirm: false, - console: false, - Debug : false, - opera : false, - prompt : false -}; - -exports.worker = { - importScripts : true, - onmessage : true, - postMessage : true, - self : true, - FileReaderSync : true -}; - -// Widely adopted global names that are not part of ECMAScript standard -exports.nonstandard = { - escape : false, - unescape: false -}; - -// Globals provided by popular JavaScript environments. - -exports.couch = { - "require" : false, - respond : false, - getRow : false, - emit : false, - send : false, - start : false, - sum : false, - log : false, - exports : false, - module : false, - provides : false -}; - -exports.node = { - __filename : false, - __dirname : false, - GLOBAL : false, - global : false, - module : false, - require : false, - - // These globals are writeable because Node allows the following - // usage pattern: var Buffer = require("buffer").Buffer; - - Buffer : true, - console : true, - exports : true, - process : true, - setTimeout : true, - clearTimeout : true, - setInterval : true, - clearInterval : true, - setImmediate : true, // v0.9.1+ - clearImmediate: true // v0.9.1+ -}; - -exports.browserify = { - __filename : false, - __dirname : false, - global : false, - module : false, - require : false, - Buffer : true, - exports : true, - process : true -}; - -exports.phantom = { - phantom : true, - require : true, - WebPage : true, - console : true, // in examples, but undocumented - exports : true // v1.7+ -}; - -exports.qunit = { - asyncTest : false, - deepEqual : false, - equal : false, - expect : false, - module : false, - notDeepEqual : false, - notEqual : false, - notOk : false, - notPropEqual : false, - notStrictEqual : false, - ok : false, - propEqual : false, - QUnit : false, - raises : false, - start : false, - stop : false, - strictEqual : false, - test : false, - "throws" : false -}; - -exports.rhino = { - defineClass : false, - deserialize : false, - gc : false, - help : false, - importClass : false, - importPackage: false, - "java" : false, - load : false, - loadClass : false, - Packages : false, - print : false, - quit : false, - readFile : false, - readUrl : false, - runCommand : false, - seal : false, - serialize : false, - spawn : false, - sync : false, - toint32 : false, - version : false -}; - -exports.shelljs = { - target : false, - echo : false, - exit : false, - cd : false, - pwd : false, - ls : false, - find : false, - cp : false, - rm : false, - mv : false, - mkdir : false, - test : false, - cat : false, - sed : false, - grep : false, - which : false, - dirs : false, - pushd : false, - popd : false, - env : false, - exec : false, - chmod : false, - config : false, - error : false, - tempdir : false -}; - -exports.typed = { - ArrayBuffer : false, - ArrayBufferView : false, - DataView : false, - Float32Array : false, - Float64Array : false, - Int16Array : false, - Int32Array : false, - Int8Array : false, - Uint16Array : false, - Uint32Array : false, - Uint8Array : false, - Uint8ClampedArray : false -}; - -exports.wsh = { - ActiveXObject : true, - Enumerator : true, - GetObject : true, - ScriptEngine : true, - ScriptEngineBuildVersion : true, - ScriptEngineMajorVersion : true, - ScriptEngineMinorVersion : true, - VBArray : true, - WSH : true, - WScript : true, - XDomainRequest : true -}; - -// Globals provided by popular JavaScript libraries. - -exports.dojo = { - dojo : false, - dijit : false, - dojox : false, - define : false, - "require": false -}; - -exports.jquery = { - "$" : false, - jQuery : false -}; - -exports.mootools = { - "$" : false, - "$$" : false, - Asset : false, - Browser : false, - Chain : false, - Class : false, - Color : false, - Cookie : false, - Core : false, - Document : false, - DomReady : false, - DOMEvent : false, - DOMReady : false, - Drag : false, - Element : false, - Elements : false, - Event : false, - Events : false, - Fx : false, - Group : false, - Hash : false, - HtmlTable : false, - IFrame : false, - IframeShim : false, - InputValidator: false, - instanceOf : false, - Keyboard : false, - Locale : false, - Mask : false, - MooTools : false, - Native : false, - Options : false, - OverText : false, - Request : false, - Scroller : false, - Slick : false, - Slider : false, - Sortables : false, - Spinner : false, - Swiff : false, - Tips : false, - Type : false, - typeOf : false, - URI : false, - Window : false -}; - -exports.prototypejs = { - "$" : false, - "$$" : false, - "$A" : false, - "$F" : false, - "$H" : false, - "$R" : false, - "$break" : false, - "$continue" : false, - "$w" : false, - Abstract : false, - Ajax : false, - Class : false, - Enumerable : false, - Element : false, - Event : false, - Field : false, - Form : false, - Hash : false, - Insertion : false, - ObjectRange : false, - PeriodicalExecuter: false, - Position : false, - Prototype : false, - Selector : false, - Template : false, - Toggle : false, - Try : false, - Autocompleter : false, - Builder : false, - Control : false, - Draggable : false, - Draggables : false, - Droppables : false, - Effect : false, - Sortable : false, - SortableObserver : false, - Sound : false, - Scriptaculous : false -}; - -exports.yui = { - YUI : false, - Y : false, - YUI_config: false -}; - -exports.mocha = { - // Global (for config etc.) - mocha : false, - // BDD - describe : false, - xdescribe : false, - it : false, - xit : false, - context : false, - xcontext : false, - before : false, - after : false, - beforeEach : false, - afterEach : false, - // TDD - suite : false, - test : false, - setup : false, - teardown : false, - suiteSetup : false, - suiteTeardown : false -}; - -exports.jasmine = { - jasmine : false, - describe : false, - xdescribe : false, - it : false, - xit : false, - beforeEach : false, - afterEach : false, - setFixtures : false, - loadFixtures: false, - spyOn : false, - expect : false, - // Jasmine 1.3 - runs : false, - waitsFor : false, - waits : false, - // Jasmine 2.1 - beforeAll : false, - afterAll : false, - fail : false, - fdescribe : false, - fit : false, - pending : false -}; - -},{}],"jshint":[function(require,module,exports){ -/*! - * JSHint, by JSHint Community. - * - * This file (and this file only) is licensed under the same slightly modified - * MIT license that JSLint is. It stops evil-doers everywhere: - * - * Copyright (c) 2002 Douglas Crockford (www.JSLint.com) - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom - * the Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * The Software shall be used for Good, not Evil. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - * DEALINGS IN THE SOFTWARE. - * - */ - -/*jshint quotmark:double */ -/*exported console */ - -var _ = require("lodash"); -var events = require("events"); -var vars = require("./vars.js"); -var messages = require("./messages.js"); -var Lexer = require("./lex.js").Lexer; -var reg = require("./reg.js"); -var state = require("./state.js").state; -var style = require("./style.js"); -var options = require("./options.js"); -var scopeManager = require("./scope-manager.js"); - -// We need this module here because environments such as IE and Rhino -// don't necessarilly expose the 'console' API and browserify uses -// it to log things. It's a sad state of affair, really. -var console = require("console-browserify"); - -// We build the application inside a function so that we produce only a singleton -// variable. That function will be invoked immediately, and its return value is -// the JSHINT function itself. - -var JSHINT = (function() { - "use strict"; - - var api, // Extension API - - // These are operators that should not be used with the ! operator. - bang = { - "<" : true, - "<=" : true, - "==" : true, - "===": true, - "!==": true, - "!=" : true, - ">" : true, - ">=" : true, - "+" : true, - "-" : true, - "*" : true, - "/" : true, - "%" : true - }, - - declared, // Globals that were declared using /*global ... */ syntax. - - functionicity = [ - "closure", "exception", "global", "label", - "outer", "unused", "var" - ], - - functions, // All of the functions - - inblock, - indent, - lookahead, - lex, - member, - membersOnly, - predefined, // Global variables defined by option - - stack, - urls, - - extraModules = [], - emitter = new events.EventEmitter(); - - function checkOption(name, t) { - name = name.trim(); - - if (/^[+-]W\d{3}$/g.test(name)) { - return true; - } - - if (options.validNames.indexOf(name) === -1) { - if (t.type !== "jslint" && !_.has(options.removed, name)) { - error("E001", t, name); - return false; - } - } - - return true; - } - - function isString(obj) { - return Object.prototype.toString.call(obj) === "[object String]"; - } - - function isIdentifier(tkn, value) { - if (!tkn) - return false; - - if (!tkn.identifier || tkn.value !== value) - return false; - - return true; - } - - function isReserved(token) { - if (!token.reserved) { - return false; - } - var meta = token.meta; - - if (meta && meta.isFutureReservedWord) { - if (meta.moduleOnly && !state.option.module) { - return false; - } - - if (state.inES5()) { - // ES3 FutureReservedWord in an ES5 environment. - if (!meta.es5) { - return false; - } - - // Some ES5 FutureReservedWord identifiers are active only - // within a strict mode environment. - if (meta.strictOnly) { - if (!state.option.strict && !state.isStrict()) { - return false; - } - } - - if (token.isProperty) { - return false; - } - } - } - - return true; - } - - function supplant(str, data) { - return str.replace(/\{([^{}]*)\}/g, function(a, b) { - var r = data[b]; - return typeof r === "string" || typeof r === "number" ? r : a; - }); - } - - function combine(dest, src) { - Object.keys(src).forEach(function(name) { - if (_.has(JSHINT.blacklist, name)) return; - dest[name] = src[name]; - }); - } - - function processenforceall() { - if (state.option.enforceall) { - for (var enforceopt in options.bool.enforcing) { - if (state.option[enforceopt] === undefined && - !options.noenforceall[enforceopt]) { - state.option[enforceopt] = true; - } - } - for (var relaxopt in options.bool.relaxing) { - if (state.option[relaxopt] === undefined) { - state.option[relaxopt] = false; - } - } - } - } - - /** - * Apply all linting options according to the status of the `state` object. - */ - function applyOptions() { - var badESOpt = null; - processenforceall(); - - /** - * TODO: Remove in JSHint 3 - */ - badESOpt = state.inferEsVersion(); - if (badESOpt) { - quit("E059", state.tokens.next, "esversion", badESOpt); - } - - if (state.inES5()) { - combine(predefined, vars.ecmaIdentifiers[5]); - } - - if (state.inES6()) { - combine(predefined, vars.ecmaIdentifiers[6]); - } - - /** - * Use `in` to check for the presence of any explicitly-specified value for - * `globalstrict` because both `true` and `false` should trigger an error. - */ - if (state.option.strict === "global" && "globalstrict" in state.option) { - quit("E059", state.tokens.next, "strict", "globalstrict"); - } - - if (state.option.module) { - /** - * TODO: Extend this restriction to *all* ES6-specific options. - */ - if (!state.inES6()) { - warning("W134", state.tokens.next, "module", 6); - } - } - - if (state.option.couch) { - combine(predefined, vars.couch); - } - - if (state.option.qunit) { - combine(predefined, vars.qunit); - } - - if (state.option.rhino) { - combine(predefined, vars.rhino); - } - - if (state.option.shelljs) { - combine(predefined, vars.shelljs); - combine(predefined, vars.node); - } - if (state.option.typed) { - combine(predefined, vars.typed); - } - - if (state.option.phantom) { - combine(predefined, vars.phantom); - } - - if (state.option.prototypejs) { - combine(predefined, vars.prototypejs); - } - - if (state.option.node) { - combine(predefined, vars.node); - combine(predefined, vars.typed); - } - - if (state.option.devel) { - combine(predefined, vars.devel); - } - - if (state.option.dojo) { - combine(predefined, vars.dojo); - } - - if (state.option.browser) { - combine(predefined, vars.browser); - combine(predefined, vars.typed); - } - - if (state.option.browserify) { - combine(predefined, vars.browser); - combine(predefined, vars.typed); - combine(predefined, vars.browserify); - } - - if (state.option.nonstandard) { - combine(predefined, vars.nonstandard); - } - - if (state.option.jasmine) { - combine(predefined, vars.jasmine); - } - - if (state.option.jquery) { - combine(predefined, vars.jquery); - } - - if (state.option.mootools) { - combine(predefined, vars.mootools); - } - - if (state.option.worker) { - combine(predefined, vars.worker); - } - - if (state.option.wsh) { - combine(predefined, vars.wsh); - } - - if (state.option.yui) { - combine(predefined, vars.yui); - } - - if (state.option.mocha) { - combine(predefined, vars.mocha); - } - } - - // Produce an error warning. - function quit(code, token, a, b) { - var percentage = Math.floor((token.line / state.lines.length) * 100); - var message = messages.errors[code].desc; - - var exception = { - name: "JSHintError", - line: token.line, - character: token.from, - message: message + " (" + percentage + "% scanned).", - raw: message, - code: code, - a: a, - b: b - }; - - exception.reason = supplant(message, exception) + " (" + percentage + - "% scanned)."; - - throw exception; - } - - function removeIgnoredMessages() { - var ignored = state.ignoredLines; - - if (_.isEmpty(ignored)) return; - JSHINT.errors = _.reject(JSHINT.errors, function(err) { return ignored[err.line] }); - } - - function warning(code, t, a, b, c, d) { - var ch, l, w, msg; - - if (/^W\d{3}$/.test(code)) { - if (state.ignored[code]) - return; - - msg = messages.warnings[code]; - } else if (/E\d{3}/.test(code)) { - msg = messages.errors[code]; - } else if (/I\d{3}/.test(code)) { - msg = messages.info[code]; - } - - t = t || state.tokens.next || {}; - if (t.id === "(end)") { // `~ - t = state.tokens.curr; - } - - l = t.line; - ch = t.from; - - w = { - id: "(error)", - raw: msg.desc, - code: msg.code, - evidence: state.lines[l - 1] || "", - line: l, - character: ch, - scope: JSHINT.scope, - a: a, - b: b, - c: c, - d: d - }; - - w.reason = supplant(msg.desc, w); - JSHINT.errors.push(w); - - removeIgnoredMessages(); - - if (JSHINT.errors.length >= state.option.maxerr) - quit("E043", t); - - return w; - } - - function warningAt(m, l, ch, a, b, c, d) { - return warning(m, { - line: l, - from: ch - }, a, b, c, d); - } - - function error(m, t, a, b, c, d) { - warning(m, t, a, b, c, d); - } - - function errorAt(m, l, ch, a, b, c, d) { - return error(m, { - line: l, - from: ch - }, a, b, c, d); - } - - // Tracking of "internal" scripts, like eval containing a static string - function addEvalCode(elem, token) { - JSHINT.internals.push({ - id: "(internal)", - elem: elem, - token: token, - code: token.value.replace(/([^\\])(\\*)\2\\n/g, "$1\n") - }); - } - - /** - * Process an inline linting directive - * - * @param {Token} directiveToken - the directive-bearing comment token - * @param {Token} previous - the token that preceeds the directive - */ - function lintingDirective(directiveToken, previous) { - var body = directiveToken.body.split(",") - .map(function(s) { return s.trim(); }); - var predef = {}; - - if (directiveToken.type === "falls through") { - previous.caseFallsThrough = true; - return; - } - - if (directiveToken.type === "globals") { - body.forEach(function(g, idx) { - g = g.split(":"); - var key = (g[0] || "").trim(); - var val = (g[1] || "").trim(); - - if (key === "-" || !key.length) { - // Ignore trailing comma - if (idx > 0 && idx === body.length - 1) { - return; - } - error("E002", directiveToken); - return; - } - - if (key.charAt(0) === "-") { - key = key.slice(1); - val = false; - - JSHINT.blacklist[key] = key; - delete predefined[key]; - } else { - predef[key] = (val === "true"); - } - }); - - combine(predefined, predef); - - for (var key in predef) { - if (_.has(predef, key)) { - declared[key] = directiveToken; - } - } - } - - if (directiveToken.type === "exported") { - body.forEach(function(e, idx) { - if (!e.length) { - // Ignore trailing comma - if (idx > 0 && idx === body.length - 1) { - return; - } - error("E002", directiveToken); - return; - } - - state.funct["(scope)"].addExported(e); - }); - } - - if (directiveToken.type === "members") { - membersOnly = membersOnly || {}; - - body.forEach(function(m) { - var ch1 = m.charAt(0); - var ch2 = m.charAt(m.length - 1); - - if (ch1 === ch2 && (ch1 === "\"" || ch1 === "'")) { - m = m - .substr(1, m.length - 2) - .replace("\\\"", "\""); - } - - membersOnly[m] = false; - }); - } - - var numvals = [ - "maxstatements", - "maxparams", - "maxdepth", - "maxcomplexity", - "maxerr", - "maxlen", - "indent" - ]; - - if (directiveToken.type === "jshint" || directiveToken.type === "jslint") { - body.forEach(function(g) { - g = g.split(":"); - var key = (g[0] || "").trim(); - var val = (g[1] || "").trim(); - - if (!checkOption(key, directiveToken)) { - return; - } - - if (numvals.indexOf(key) >= 0) { - // GH988 - numeric options can be disabled by setting them to `false` - if (val !== "false") { - val = +val; - - if (typeof val !== "number" || !isFinite(val) || val <= 0 || Math.floor(val) !== val) { - error("E032", directiveToken, g[1].trim()); - return; - } - - state.option[key] = val; - } else { - state.option[key] = key === "indent" ? 4 : false; - } - - return; - } - - if (key === "validthis") { - // `validthis` is valid only within a function scope. - - if (state.funct["(global)"]) - return void error("E009"); - - if (val !== "true" && val !== "false") - return void error("E002", directiveToken); - - state.option.validthis = (val === "true"); - return; - } - - if (key === "quotmark") { - switch (val) { - case "true": - case "false": - state.option.quotmark = (val === "true"); - break; - case "double": - case "single": - state.option.quotmark = val; - break; - default: - error("E002", directiveToken); - } - return; - } - - if (key === "shadow") { - switch (val) { - case "true": - state.option.shadow = true; - break; - case "outer": - state.option.shadow = "outer"; - break; - case "false": - case "inner": - state.option.shadow = "inner"; - break; - default: - error("E002", directiveToken); - } - return; - } - - if (key === "unused") { - switch (val) { - case "true": - state.option.unused = true; - break; - case "false": - state.option.unused = false; - break; - case "vars": - case "strict": - state.option.unused = val; - break; - default: - error("E002", directiveToken); - } - return; - } - - if (key === "latedef") { - switch (val) { - case "true": - state.option.latedef = true; - break; - case "false": - state.option.latedef = false; - break; - case "nofunc": - state.option.latedef = "nofunc"; - break; - default: - error("E002", directiveToken); - } - return; - } - - if (key === "ignore") { - switch (val) { - case "line": - state.ignoredLines[directiveToken.line] = true; - removeIgnoredMessages(); - break; - default: - error("E002", directiveToken); - } - return; - } - - if (key === "strict") { - switch (val) { - case "true": - state.option.strict = true; - break; - case "false": - state.option.strict = false; - break; - case "global": - case "implied": - state.option.strict = val; - break; - default: - error("E002", directiveToken); - } - return; - } - - if (key === "module") { - /** - * TODO: Extend this restriction to *all* "environmental" options. - */ - if (!hasParsedCode(state.funct)) { - error("E055", directiveToken, "module"); - } - } - - if (key === "esversion") { - switch (val) { - case "3": - case "5": - case "6": - case "2015": - state.option.moz = false; - state.option.esversion = +val; - break; - default: - error("E002", directiveToken); - } - if (!hasParsedCode(state.funct)) { - error("E055", directiveToken, "esversion"); - } - return; - } - - var match = /^([+-])(W\d{3})$/g.exec(key); - if (match) { - // ignore for -W..., unignore for +W... - state.ignored[match[2]] = (match[1] === "-"); - return; - } - - var tn; - if (val === "true" || val === "false") { - if (directiveToken.type === "jslint") { - tn = options.renamed[key] || key; - state.option[tn] = (val === "true"); - - if (options.inverted[tn] !== undefined) { - state.option[tn] = !state.option[tn]; - } - } else { - state.option[key] = (val === "true"); - } - - return; - } - - error("E002", directiveToken); - }); - - applyOptions(); - } - } - - /** - * Return a token beyond the token available in `state.tokens.next`. If no - * such token exists, return the "(end)" token. This function is used to - * determine parsing strategies in cases where the value of the next token - * does not provide sufficient information, as is the case with `for` loops, - * e.g.: - * - * for ( var i in ... - * - * versus: - * - * for ( var i = ... - * - * @param {number} [p] - offset of desired token; defaults to 0 - * - * @returns {token} - */ - function peek(p) { - var i = p || 0, j = lookahead.length, t; - - if (i < j) { - return lookahead[i]; - } - - while (j <= i) { - t = lex.token(); - - // When the lexer is exhausted, this function should produce the "(end)" - // token, even in cases where the requested token is beyond the end of - // the input stream. - if (!t) { - // If the lookahead buffer is empty, the expected "(end)" token was - // already emitted by the most recent invocation of `advance` and is - // available as the next token. - if (!lookahead.length) { - return state.tokens.next; - } - - return lookahead[j - 1]; - } - - lookahead[j] = t; - j += 1; - } - - return t; - } - - function peekIgnoreEOL() { - var i = 0; - var t; - do { - t = peek(i++); - } while (t.id === "(endline)"); - return t; - } - - // Produce the next token. It looks for programming errors. - - function advance(id, t) { - - switch (state.tokens.curr.id) { - case "(number)": - if (state.tokens.next.id === ".") { - warning("W005", state.tokens.curr); - } - break; - case "-": - if (state.tokens.next.id === "-" || state.tokens.next.id === "--") { - warning("W006"); - } - break; - case "+": - if (state.tokens.next.id === "+" || state.tokens.next.id === "++") { - warning("W007"); - } - break; - } - - if (id && state.tokens.next.id !== id) { - if (t) { - if (state.tokens.next.id === "(end)") { - error("E019", t, t.id); - } else { - error("E020", state.tokens.next, id, t.id, t.line, state.tokens.next.value); - } - } else if (state.tokens.next.type !== "(identifier)" || state.tokens.next.value !== id) { - warning("W116", state.tokens.next, id, state.tokens.next.value); - } - } - - state.tokens.prev = state.tokens.curr; - state.tokens.curr = state.tokens.next; - for (;;) { - state.tokens.next = lookahead.shift() || lex.token(); - - if (!state.tokens.next) { // No more tokens left, give up - quit("E041", state.tokens.curr); - } - - if (state.tokens.next.id === "(end)" || state.tokens.next.id === "(error)") { - return; - } - - if (state.tokens.next.check) { - state.tokens.next.check(); - } - - if (state.tokens.next.isSpecial) { - lintingDirective(state.tokens.next, state.tokens.curr); - } else { - if (state.tokens.next.id !== "(endline)") { - break; - } - } - } - } - - /** - * Determine whether a given token is an operator. - * - * @param {token} token - * - * @returns {boolean} - */ - function isOperator(token) { - return token.first || token.right || token.left || token.id === "yield"; - } - - function isEndOfExpr(curr, next) { - if (arguments.length === 0) { - curr = state.tokens.curr; - next = state.tokens.next; - } - - if (next.id === ";" || next.id === "}" || next.id === ":") { - return true; - } - if (next.infix === curr.infix || curr.ltBoundary === "after" || - next.ltBoundary === "before") { - return curr.line !== startLine(next); - } - return false; - } - - // This is the heart of JSHINT, the Pratt parser. In addition to parsing, it - // is looking for ad hoc lint patterns. We add .fud to Pratt's model, which is - // like .nud except that it is only used on the first token of a statement. - // Having .fud makes it much easier to define statement-oriented languages like - // JavaScript. I retained Pratt's nomenclature. - - // .nud Null denotation - // .fud First null denotation - // .led Left denotation - // lbp Left binding power - // rbp Right binding power - - // They are elements of the parsing method called Top Down Operator Precedence. - - function expression(rbp, initial) { - var left, isArray = false, isObject = false, isLetExpr = false; - - state.nameStack.push(); - - // if current expression is a let expression - if (!initial && state.tokens.next.value === "let" && peek(0).value === "(") { - if (!state.inMoz()) { - warning("W118", state.tokens.next, "let expressions"); - } - isLetExpr = true; - // create a new block scope we use only for the current expression - state.funct["(scope)"].stack(); - advance("let"); - advance("("); - state.tokens.prev.fud(); - advance(")"); - } - - if (state.tokens.next.id === "(end)") - error("E006", state.tokens.curr); - - var isDangerous = - state.option.asi && - state.tokens.prev.line !== startLine(state.tokens.curr) && - _.contains(["]", ")"], state.tokens.prev.id) && - _.contains(["[", "("], state.tokens.curr.id); - - if (isDangerous) - warning("W014", state.tokens.curr, state.tokens.curr.id); - - advance(); - - if (initial) { - state.funct["(verb)"] = state.tokens.curr.value; - state.tokens.curr.beginsStmt = true; - } - - if (initial === true && state.tokens.curr.fud) { - left = state.tokens.curr.fud(); - } else { - if (state.tokens.curr.nud) { - left = state.tokens.curr.nud(rbp); - } else { - error("E030", state.tokens.curr, state.tokens.curr.id); - } - - while (rbp < state.tokens.next.lbp && !isEndOfExpr()) { - isArray = state.tokens.curr.value === "Array"; - isObject = state.tokens.curr.value === "Object"; - - // #527, new Foo.Array(), Foo.Array(), new Foo.Object(), Foo.Object() - // Line breaks in IfStatement heads exist to satisfy the checkJSHint - // "Line too long." error. - if (left && (left.value || (left.first && left.first.value))) { - // If the left.value is not "new", or the left.first.value is a "." - // then safely assume that this is not "new Array()" and possibly - // not "new Object()"... - if (left.value !== "new" || - (left.first && left.first.value && left.first.value === ".")) { - isArray = false; - // ...In the case of Object, if the left.value and state.tokens.curr.value - // are not equal, then safely assume that this not "new Object()" - if (left.value !== state.tokens.curr.value) { - isObject = false; - } - } - } - - advance(); - - if (isArray && state.tokens.curr.id === "(" && state.tokens.next.id === ")") { - warning("W009", state.tokens.curr); - } - - if (isObject && state.tokens.curr.id === "(" && state.tokens.next.id === ")") { - warning("W010", state.tokens.curr); - } - - if (left && state.tokens.curr.led) { - left = state.tokens.curr.led(left); - } else { - error("E033", state.tokens.curr, state.tokens.curr.id); - } - } - } - if (isLetExpr) { - state.funct["(scope)"].unstack(); - } - - state.nameStack.pop(); - - return left; - } - - - // Functions for conformance of style. - - function startLine(token) { - return token.startLine || token.line; - } - - function nobreaknonadjacent(left, right) { - left = left || state.tokens.curr; - right = right || state.tokens.next; - if (!state.option.laxbreak && left.line !== startLine(right)) { - warning("W014", right, right.value); - } - } - - function nolinebreak(t) { - t = t || state.tokens.curr; - if (t.line !== startLine(state.tokens.next)) { - warning("E022", t, t.value); - } - } - - function nobreakcomma(left, right) { - if (left.line !== startLine(right)) { - if (!state.option.laxcomma) { - if (parseComma.first) { - warning("I001"); - parseComma.first = false; - } - warning("W014", left, right.value); - } - } - } - - function parseComma(opts) { - opts = opts || {}; - - if (!opts.peek) { - nobreakcomma(state.tokens.curr, state.tokens.next); - advance(","); - } else { - nobreakcomma(state.tokens.prev, state.tokens.curr); - } - - if (state.tokens.next.identifier && !(opts.property && state.inES5())) { - // Keywords that cannot follow a comma operator. - switch (state.tokens.next.value) { - case "break": - case "case": - case "catch": - case "continue": - case "default": - case "do": - case "else": - case "finally": - case "for": - case "if": - case "in": - case "instanceof": - case "return": - case "switch": - case "throw": - case "try": - case "var": - case "let": - case "while": - case "with": - error("E024", state.tokens.next, state.tokens.next.value); - return false; - } - } - - if (state.tokens.next.type === "(punctuator)") { - switch (state.tokens.next.value) { - case "}": - case "]": - case ",": - if (opts.allowTrailing) { - return true; - } - - /* falls through */ - case ")": - error("E024", state.tokens.next, state.tokens.next.value); - return false; - } - } - return true; - } - - // Functional constructors for making the symbols that will be inherited by - // tokens. - - function symbol(s, p) { - var x = state.syntax[s]; - if (!x || typeof x !== "object") { - state.syntax[s] = x = { - id: s, - lbp: p, - value: s - }; - } - return x; - } - - function delim(s) { - var x = symbol(s, 0); - x.delim = true; - return x; - } - - function stmt(s, f) { - var x = delim(s); - x.identifier = x.reserved = true; - x.fud = f; - return x; - } - - function blockstmt(s, f) { - var x = stmt(s, f); - x.block = true; - return x; - } - - function reserveName(x) { - var c = x.id.charAt(0); - if ((c >= "a" && c <= "z") || (c >= "A" && c <= "Z")) { - x.identifier = x.reserved = true; - } - return x; - } - - function prefix(s, f) { - var x = symbol(s, 150); - reserveName(x); - - x.nud = (typeof f === "function") ? f : function() { - this.arity = "unary"; - this.right = expression(150); - - if (this.id === "++" || this.id === "--") { - if (state.option.plusplus) { - warning("W016", this, this.id); - } else if (this.right && (!this.right.identifier || isReserved(this.right)) && - this.right.id !== "." && this.right.id !== "[") { - warning("W017", this); - } - - if (this.right && this.right.isMetaProperty) { - error("E031", this); - // detect increment/decrement of a const - // in the case of a.b, right will be the "." punctuator - } else if (this.right && this.right.identifier) { - state.funct["(scope)"].block.modify(this.right.value, this); - } - } - - return this; - }; - - return x; - } - - function type(s, f) { - var x = delim(s); - x.type = s; - x.nud = f; - return x; - } - - function reserve(name, func) { - var x = type(name, func); - x.identifier = true; - x.reserved = true; - return x; - } - - function FutureReservedWord(name, meta) { - var x = type(name, (meta && meta.nud) || function() { - return this; - }); - - meta = meta || {}; - meta.isFutureReservedWord = true; - - x.value = name; - x.identifier = true; - x.reserved = true; - x.meta = meta; - - return x; - } - - function reservevar(s, v) { - return reserve(s, function() { - if (typeof v === "function") { - v(this); - } - return this; - }); - } - - function infix(s, f, p, w) { - var x = symbol(s, p); - reserveName(x); - x.infix = true; - x.led = function(left) { - if (!w) { - nobreaknonadjacent(state.tokens.prev, state.tokens.curr); - } - if ((s === "in" || s === "instanceof") && left.id === "!") { - warning("W018", left, "!"); - } - if (typeof f === "function") { - return f(left, this); - } else { - this.left = left; - this.right = expression(p); - return this; - } - }; - return x; - } - - function application(s) { - var x = symbol(s, 42); - - x.infix = true; - x.led = function(left) { - nobreaknonadjacent(state.tokens.prev, state.tokens.curr); - - this.left = left; - this.right = doFunction({ type: "arrow", loneArg: left }); - return this; - }; - return x; - } - - function relation(s, f) { - var x = symbol(s, 100); - - x.infix = true; - x.led = function(left) { - nobreaknonadjacent(state.tokens.prev, state.tokens.curr); - this.left = left; - var right = this.right = expression(100); - - if (isIdentifier(left, "NaN") || isIdentifier(right, "NaN")) { - warning("W019", this); - } else if (f) { - f.apply(this, [left, right]); - } - - if (!left || !right) { - quit("E041", state.tokens.curr); - } - - if (left.id === "!") { - warning("W018", left, "!"); - } - - if (right.id === "!") { - warning("W018", right, "!"); - } - - return this; - }; - return x; - } - - var typeofValues = {}; - typeofValues.legacy = [ - // E4X extended the `typeof` operator to return "xml" for the XML and - // XMLList types it introduced. - // Ref: 11.3.2 The typeof Operator - // http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-357.pdf - "xml", - // IE<9 reports "unknown" when the `typeof` operator is applied to an - // object existing across a COM+ bridge. In lieu of official documentation - // (which does not exist), see: - // http://robertnyman.com/2005/12/21/what-is-typeof-unknown/ - "unknown" - ]; - typeofValues.es3 = [ - "undefined", "boolean", "number", "string", "function", "object", - ]; - typeofValues.es3 = typeofValues.es3.concat(typeofValues.legacy); - typeofValues.es6 = typeofValues.es3.concat("symbol"); - - // Checks whether the 'typeof' operator is used with the correct - // value. For docs on 'typeof' see: - // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof - function isTypoTypeof(left, right, state) { - var values; - - if (state.option.notypeof) - return false; - - if (!left || !right) - return false; - - values = state.inES6() ? typeofValues.es6 : typeofValues.es3; - - if (right.type === "(identifier)" && right.value === "typeof" && left.type === "(string)") - return !_.contains(values, left.value); - - return false; - } - - function isGlobalEval(left, state) { - var isGlobal = false; - - // permit methods to refer to an "eval" key in their own context - if (left.type === "this" && state.funct["(context)"] === null) { - isGlobal = true; - } - // permit use of "eval" members of objects - else if (left.type === "(identifier)") { - if (state.option.node && left.value === "global") { - isGlobal = true; - } - - else if (state.option.browser && (left.value === "window" || left.value === "document")) { - isGlobal = true; - } - } - - return isGlobal; - } - - function findNativePrototype(left) { - var natives = [ - "Array", "ArrayBuffer", "Boolean", "Collator", "DataView", "Date", - "DateTimeFormat", "Error", "EvalError", "Float32Array", "Float64Array", - "Function", "Infinity", "Intl", "Int16Array", "Int32Array", "Int8Array", - "Iterator", "Number", "NumberFormat", "Object", "RangeError", - "ReferenceError", "RegExp", "StopIteration", "String", "SyntaxError", - "TypeError", "Uint16Array", "Uint32Array", "Uint8Array", "Uint8ClampedArray", - "URIError" - ]; - - function walkPrototype(obj) { - if (typeof obj !== "object") return; - return obj.right === "prototype" ? obj : walkPrototype(obj.left); - } - - function walkNative(obj) { - while (!obj.identifier && typeof obj.left === "object") - obj = obj.left; - - if (obj.identifier && natives.indexOf(obj.value) >= 0 && - state.funct["(scope)"].isPredefined(obj.value)) { - return obj.value; - } - } - - var prototype = walkPrototype(left); - if (prototype) return walkNative(prototype); - } - - /** - * Checks the left hand side of an assignment for issues, returns if ok - * @param {token} left - the left hand side of the assignment - * @param {token=} assignToken - the token for the assignment, used for reporting - * @param {object=} options - optional object - * @param {boolean} options.allowDestructuring - whether to allow destructuting binding - * @returns {boolean} Whether the left hand side is OK - */ - function checkLeftSideAssign(left, assignToken, options) { - - var allowDestructuring = options && options.allowDestructuring; - - assignToken = assignToken || left; - - if (state.option.freeze) { - var nativeObject = findNativePrototype(left); - if (nativeObject) - warning("W121", left, nativeObject); - } - if (checkPunctuator(left, "...")) { - left = left.right; - } - - if (left.identifier && !left.isMetaProperty) { - // reassign also calls modify - // but we are specific in order to catch function re-assignment - // and globals re-assignment - state.funct["(scope)"].block.reassign(left.value, left); - } - - if (left.id === ".") { - if (!left.left || left.left.value === "arguments" && !state.isStrict()) { - warning("E031", assignToken); - } - - state.nameStack.set(state.tokens.prev); - return true; - } else if (left.id === "{" || left.id === "[") { - if (!allowDestructuring || !left.destructAssign) { - if (left.id === "{" || !left.left) { - warning("E031", assignToken); - } else if (left.left.value === "arguments" && !state.isStrict()) { - warning("E031", assignToken); - } - } - - if (left.id === "[") { - state.nameStack.set(left.right); - } - - return true; - } else if (left.identifier && !isReserved(left) && !left.isMetaProperty) { - if (state.funct["(scope)"].labeltype(left.value) === "exception") { - warning("W022", left); - } - state.nameStack.set(left); - return true; - } - - if (left === state.syntax["function"]) { - warning("W023", state.tokens.curr); - } else { - error("E031", assignToken); - } - - return false; - } - - function assignop(s, f, p) { - var x = infix(s, typeof f === "function" ? f : function(left, that) { - that.left = left; - - checkLeftSideAssign(left, that, { allowDestructuring: true }); - - that.right = expression(10); - - return that; - }, p); - - x.exps = true; - x.assign = true; - return x; - } - - - function bitwise(s, f, p) { - var x = symbol(s, p); - reserveName(x); - x.infix = true; - x.led = (typeof f === "function") ? f : function(left) { - if (state.option.bitwise) { - warning("W016", this, this.id); - } - this.left = left; - this.right = expression(p); - return this; - }; - return x; - } - - function bitwiseassignop(s) { - return assignop(s, function(left, that) { - if (state.option.bitwise) { - warning("W016", that, that.id); - } - - checkLeftSideAssign(left, that); - - that.right = expression(10); - - return that; - }, 20); - } - - function suffix(s) { - var x = symbol(s, 150); - - x.led = function(left) { - // this = suffix e.g. "++" punctuator - // left = symbol operated e.g. "a" identifier or "a.b" punctuator - if (state.option.plusplus) { - warning("W016", this, this.id); - } else if ((!left.identifier || isReserved(left)) && left.id !== "." && left.id !== "[") { - warning("W017", this); - } - - if (left.isMetaProperty) { - error("E031", this); - // detect increment/decrement of a const - // in the case of a.b, left will be the "." punctuator - } else if (left && left.identifier) { - state.funct["(scope)"].block.modify(left.value, left); - } - - this.left = left; - return this; - }; - return x; - } - - // fnparam means that this identifier is being defined as a function - // argument (see identifier()) - // prop means that this identifier is that of an object property - - function optionalidentifier(fnparam, prop, preserve) { - if (!state.tokens.next.identifier) { - return; - } - - if (!preserve) { - advance(); - } - - var curr = state.tokens.curr; - var val = state.tokens.curr.value; - - if (!isReserved(curr)) { - return val; - } - - if (prop) { - if (state.inES5()) { - return val; - } - } - - if (fnparam && val === "undefined") { - return val; - } - - warning("W024", state.tokens.curr, state.tokens.curr.id); - return val; - } - - // fnparam means that this identifier is being defined as a function - // argument - // prop means that this identifier is that of an object property - function identifier(fnparam, prop) { - var i = optionalidentifier(fnparam, prop, false); - if (i) { - return i; - } - - // parameter destructuring with rest operator - if (state.tokens.next.value === "...") { - if (!state.inES6(true)) { - warning("W119", state.tokens.next, "spread/rest operator", "6"); - } - advance(); - - if (checkPunctuator(state.tokens.next, "...")) { - warning("E024", state.tokens.next, "..."); - while (checkPunctuator(state.tokens.next, "...")) { - advance(); - } - } - - if (!state.tokens.next.identifier) { - warning("E024", state.tokens.curr, state.tokens.next.id); - return; - } - - return identifier(fnparam, prop); - } else { - error("E030", state.tokens.next, state.tokens.next.value); - - // The token should be consumed after a warning is issued so the parser - // can continue as though an identifier were found. The semicolon token - // should not be consumed in this way so that the parser interprets it as - // a statement delimeter; - if (state.tokens.next.id !== ";") { - advance(); - } - } - } - - - function reachable(controlToken) { - var i = 0, t; - if (state.tokens.next.id !== ";" || controlToken.inBracelessBlock) { - return; - } - for (;;) { - do { - t = peek(i); - i += 1; - } while (t.id !== "(end)" && t.id === "(comment)"); - - if (t.reach) { - return; - } - if (t.id !== "(endline)") { - if (t.id === "function") { - if (state.option.latedef === true) { - warning("W026", t); - } - break; - } - - warning("W027", t, t.value, controlToken.value); - break; - } - } - } - - /** - * Consume the semicolon that delimits the statement currently being parsed, - * emitting relevant warnings/errors as appropriate. - * - * @param {token} stmt - token describing the statement under consideration - */ - function parseFinalSemicolon(stmt) { - if (state.tokens.next.id !== ";") { - // don't complain about unclosed templates / strings - if (state.tokens.next.isUnclosed) return advance(); - - var sameLine = startLine(state.tokens.next) === state.tokens.curr.line && - state.tokens.next.id !== "(end)"; - var blockEnd = checkPunctuator(state.tokens.next, "}"); - - if (sameLine && !blockEnd && !(stmt.id === "do" && state.inES6(true))) { - errorAt("E058", state.tokens.curr.line, state.tokens.curr.character); - } else if (!state.option.asi) { - // If this is the last statement in a block that ends on - // the same line *and* option lastsemic is on, ignore the warning. - // Otherwise, complain about missing semicolon. - if (!(blockEnd && sameLine && state.option.lastsemic)) { - warningAt("W033", state.tokens.curr.line, state.tokens.curr.character); - } - } - } else { - advance(";"); - } - } - - function statement() { - var i = indent, r, t = state.tokens.next, hasOwnScope = false; - - if (t.id === ";") { - advance(";"); - return; - } - - // Is this a labelled statement? - var res = isReserved(t); - - // We're being more tolerant here: if someone uses - // a FutureReservedWord as a label, we warn but proceed - // anyway. - - if (res && t.meta && t.meta.isFutureReservedWord && peek().id === ":") { - warning("W024", t, t.id); - res = false; - } - - if (t.identifier && !res && peek().id === ":") { - advance(); - advance(":"); - - hasOwnScope = true; - state.funct["(scope)"].stack(); - state.funct["(scope)"].block.addBreakLabel(t.value, { token: state.tokens.curr }); - - if (!state.tokens.next.labelled && state.tokens.next.value !== "{") { - warning("W028", state.tokens.next, t.value, state.tokens.next.value); - } - - state.tokens.next.label = t.value; - t = state.tokens.next; - } - - // Is it a lonely block? - - if (t.id === "{") { - // Is it a switch case block? - // - // switch (foo) { - // case bar: { <= here. - // ... - // } - // } - var iscase = (state.funct["(verb)"] === "case" && state.tokens.curr.value === ":"); - block(true, true, false, false, iscase); - - if (hasOwnScope) { - state.funct["(scope)"].unstack(); - } - - return; - } - - // Parse the statement. - - r = expression(0, true); - - if (r && !(r.identifier && r.value === "function") && - !(r.type === "(punctuator)" && r.left && - r.left.identifier && r.left.value === "function")) { - if (!state.isStrict() && state.stmtMissingStrict()) { - warning("E007"); - } - } - - // Look for the final semicolon. - - if (!t.block) { - if (!state.option.expr && (!r || !r.exps)) { - warning("W030", state.tokens.curr); - } else if (state.option.nonew && r && r.left && r.id === "(" && r.left.id === "new") { - warning("W031", t); - } - parseFinalSemicolon(t); - } - - - // Restore the indentation. - - indent = i; - if (hasOwnScope) { - state.funct["(scope)"].unstack(); - } - return r; - } - - - function statements() { - var a = [], p; - - while (!state.tokens.next.reach && state.tokens.next.id !== "(end)") { - if (state.tokens.next.id === ";") { - p = peek(); - - if (!p || (p.id !== "(" && p.id !== "[")) { - warning("W032"); - } - - advance(";"); - } else { - a.push(statement()); - } - } - return a; - } - - - /* - * read all directives - */ - function directives() { - var current = state.tokens.next; - while (state.tokens.next.id === "(string)") { - var next = peekIgnoreEOL(); - if (!isEndOfExpr(current, next)) { - break; - } - current = next; - - advance(); - var directive = state.tokens.curr.value; - if (state.directive[directive] || - (directive === "use strict" && state.option.strict === "implied")) { - warning("W034", state.tokens.curr, directive); - } - - // there's no directive negation, so always set to true - state.directive[directive] = true; - - parseFinalSemicolon(current); - } - - if (state.isStrict()) { - state.option.undef = true; - } - } - - - /* - * Parses a single block. A block is a sequence of statements wrapped in - * braces. - * - * ordinary - true for everything but function bodies and try blocks. - * stmt - true if block can be a single statement (e.g. in if/for/while). - * isfunc - true if block is a function body - * isfatarrow - true if its a body of a fat arrow function - * iscase - true if block is a switch case block - */ - function block(ordinary, stmt, isfunc, isfatarrow, iscase) { - var a, - b = inblock, - old_indent = indent, - m, - t, - line, - d; - - inblock = ordinary; - - t = state.tokens.next; - - var metrics = state.funct["(metrics)"]; - metrics.nestedBlockDepth += 1; - metrics.verifyMaxNestedBlockDepthPerFunction(); - - if (state.tokens.next.id === "{") { - advance("{"); - - // create a new block scope - state.funct["(scope)"].stack(); - state.funct["(noblockscopedvar)"] = false; - - line = state.tokens.curr.line; - if (state.tokens.next.id !== "}") { - indent += state.option.indent; - while (!ordinary && state.tokens.next.from > indent) { - indent += state.option.indent; - } - - if (isfunc) { - m = {}; - for (d in state.directive) { - if (_.has(state.directive, d)) { - m[d] = state.directive[d]; - } - } - directives(); - - if (state.option.strict && state.funct["(context)"]["(global)"]) { - if (!m["use strict"] && !state.isStrict()) { - warning("E007"); - } - } - } - - a = statements(); - - metrics.statementCount += a.length; - - indent -= state.option.indent; - } - - advance("}", t); - - if (isfunc) { - state.funct["(scope)"].validateParams(); - if (m) { - state.directive = m; - } - } - - state.funct["(scope)"].unstack(); - - indent = old_indent; - } else if (!ordinary) { - if (isfunc) { - state.funct["(scope)"].stack(); - - m = {}; - if (stmt && !isfatarrow && !state.inMoz()) { - error("W118", state.tokens.curr, "function closure expressions"); - } - - if (!stmt) { - for (d in state.directive) { - if (_.has(state.directive, d)) { - m[d] = state.directive[d]; - } - } - } - expression(10); - - if (state.option.strict && state.funct["(context)"]["(global)"]) { - if (!m["use strict"] && !state.isStrict()) { - warning("E007"); - } - } - - state.funct["(scope)"].unstack(); - } else { - error("E021", state.tokens.next, "{", state.tokens.next.value); - } - } else { - - // check to avoid let declaration not within a block - // though is fine inside for loop initializer section - state.funct["(noblockscopedvar)"] = state.tokens.next.id !== "for"; - state.funct["(scope)"].stack(); - - if (!stmt || state.option.curly) { - warning("W116", state.tokens.next, "{", state.tokens.next.value); - } - - state.tokens.next.inBracelessBlock = true; - indent += state.option.indent; - // test indentation only if statement is in new line - a = [statement()]; - indent -= state.option.indent; - - state.funct["(scope)"].unstack(); - delete state.funct["(noblockscopedvar)"]; - } - - // Don't clear and let it propagate out if it is "break", "return" or similar in switch case - switch (state.funct["(verb)"]) { - case "break": - case "continue": - case "return": - case "throw": - if (iscase) { - break; - } - - /* falls through */ - default: - state.funct["(verb)"] = null; - } - - inblock = b; - if (ordinary && state.option.noempty && (!a || a.length === 0)) { - warning("W035", state.tokens.prev); - } - metrics.nestedBlockDepth -= 1; - return a; - } - - - function countMember(m) { - if (membersOnly && typeof membersOnly[m] !== "boolean") { - warning("W036", state.tokens.curr, m); - } - if (typeof member[m] === "number") { - member[m] += 1; - } else { - member[m] = 1; - } - } - - // Build the syntax table by declaring the syntactic elements of the language. - - type("(number)", function() { - return this; - }); - - type("(string)", function() { - return this; - }); - - state.syntax["(identifier)"] = { - type: "(identifier)", - lbp: 0, - identifier: true, - - nud: function() { - var v = this.value; - - // If this identifier is the lone parameter to a shorthand "fat arrow" - // function definition, i.e. - // - // x => x; - // - // ...it should not be considered as a variable in the current scope. It - // will be added to the scope of the new function when the next token is - // parsed, so it can be safely ignored for now. - if (state.tokens.next.id === "=>") { - return this; - } - - if (!state.funct["(comparray)"].check(v)) { - state.funct["(scope)"].block.use(v, state.tokens.curr); - } - return this; - }, - - led: function() { - error("E033", state.tokens.next, state.tokens.next.value); - } - }; - - var baseTemplateSyntax = { - identifier: false, - template: true, - }; - state.syntax["(template)"] = _.extend({ - lbp: 155, - type: "(template)", - nud: doTemplateLiteral, - led: doTemplateLiteral, - noSubst: false - }, baseTemplateSyntax); - - state.syntax["(template middle)"] = _.extend({ - lbp: 0, - type: "(template middle)", - middle: true, - noSubst: false - }, baseTemplateSyntax); - - state.syntax["(template tail)"] = _.extend({ - lbp: 0, - type: "(template tail)", - tail: true, - noSubst: false - }, baseTemplateSyntax); - - state.syntax["(no subst template)"] = _.extend({ - lbp: 155, - type: "(template)", - nud: doTemplateLiteral, - led: doTemplateLiteral, - noSubst: true, - tail: true // mark as tail, since it's always the last component - }, baseTemplateSyntax); - - type("(regexp)", function() { - return this; - }); - - // ECMAScript parser - - delim("(endline)"); - (function(x) { - x.line = x.from = 0; - })(delim("(begin)")); - delim("(end)").reach = true; - delim("(error)").reach = true; - delim("}").reach = true; - delim(")"); - delim("]"); - delim("\"").reach = true; - delim("'").reach = true; - delim(";"); - delim(":").reach = true; - delim("#"); - - reserve("else"); - reserve("case").reach = true; - reserve("catch"); - reserve("default").reach = true; - reserve("finally"); - reservevar("arguments", function(x) { - if (state.isStrict() && state.funct["(global)"]) { - warning("E008", x); - } - }); - reservevar("eval"); - reservevar("false"); - reservevar("Infinity"); - reservevar("null"); - reservevar("this", function(x) { - if (state.isStrict() && !isMethod() && - !state.option.validthis && ((state.funct["(statement)"] && - state.funct["(name)"].charAt(0) > "Z") || state.funct["(global)"])) { - warning("W040", x); - } - }); - reservevar("true"); - reservevar("undefined"); - - assignop("=", "assign", 20); - assignop("+=", "assignadd", 20); - assignop("-=", "assignsub", 20); - assignop("*=", "assignmult", 20); - assignop("/=", "assigndiv", 20).nud = function() { - error("E014"); - }; - assignop("%=", "assignmod", 20); - - bitwiseassignop("&="); - bitwiseassignop("|="); - bitwiseassignop("^="); - bitwiseassignop("<<="); - bitwiseassignop(">>="); - bitwiseassignop(">>>="); - infix(",", function(left, that) { - var expr; - that.exprs = [left]; - - if (state.option.nocomma) { - warning("W127"); - } - - if (!parseComma({ peek: true })) { - return that; - } - while (true) { - if (!(expr = expression(10))) { - break; - } - that.exprs.push(expr); - if (state.tokens.next.value !== "," || !parseComma()) { - break; - } - } - return that; - }, 10, true); - - infix("?", function(left, that) { - increaseComplexityCount(); - that.left = left; - that.right = expression(10); - advance(":"); - that["else"] = expression(10); - return that; - }, 30); - - var orPrecendence = 40; - infix("||", function(left, that) { - increaseComplexityCount(); - that.left = left; - that.right = expression(orPrecendence); - return that; - }, orPrecendence); - infix("&&", "and", 50); - bitwise("|", "bitor", 70); - bitwise("^", "bitxor", 80); - bitwise("&", "bitand", 90); - relation("==", function(left, right) { - var eqnull = state.option.eqnull && - ((left && left.value) === "null" || (right && right.value) === "null"); - - switch (true) { - case !eqnull && state.option.eqeqeq: - this.from = this.character; - warning("W116", this, "===", "=="); - break; - case isTypoTypeof(right, left, state): - warning("W122", this, right.value); - break; - case isTypoTypeof(left, right, state): - warning("W122", this, left.value); - break; - } - - return this; - }); - relation("===", function(left, right) { - if (isTypoTypeof(right, left, state)) { - warning("W122", this, right.value); - } else if (isTypoTypeof(left, right, state)) { - warning("W122", this, left.value); - } - return this; - }); - relation("!=", function(left, right) { - var eqnull = state.option.eqnull && - ((left && left.value) === "null" || (right && right.value) === "null"); - - if (!eqnull && state.option.eqeqeq) { - this.from = this.character; - warning("W116", this, "!==", "!="); - } else if (isTypoTypeof(right, left, state)) { - warning("W122", this, right.value); - } else if (isTypoTypeof(left, right, state)) { - warning("W122", this, left.value); - } - return this; - }); - relation("!==", function(left, right) { - if (isTypoTypeof(right, left, state)) { - warning("W122", this, right.value); - } else if (isTypoTypeof(left, right, state)) { - warning("W122", this, left.value); - } - return this; - }); - relation("<"); - relation(">"); - relation("<="); - relation(">="); - bitwise("<<", "shiftleft", 120); - bitwise(">>", "shiftright", 120); - bitwise(">>>", "shiftrightunsigned", 120); - infix("in", "in", 120); - infix("instanceof", function(left, token) { - var right; - var scope = state.funct["(scope)"]; - token.left = left; - token.right = right = expression(120); - - // This condition reflects a syntax error which will be reported by the - // `expression` function. - if (!right) { - return token; - } - - if (right.id === "(number)" || - right.id === "(string)" || - right.value === "null" || - (right.value === "undefined" && !scope.has("undefined")) || - right.arity === "unary" || - right.id === "{" || - (right.id === "[" && !right.right) || - right.id === "(regexp)" || - (right.id === "(template)" && !right.tag)) { - error("E060"); - } - - if (right.id === "function") { - warning("W139"); - } - - return token; - }, 120); - infix("+", function(left, that) { - var right; - that.left = left; - that.right = right = expression(130); - - if (left && right && left.id === "(string)" && right.id === "(string)") { - left.value += right.value; - left.character = right.character; - if (!state.option.scripturl && reg.javascriptURL.test(left.value)) { - warning("W050", left); - } - return left; - } - - return that; - }, 130); - prefix("+", "num"); - prefix("+++", function() { - warning("W007"); - this.arity = "unary"; - this.right = expression(150); - return this; - }); - infix("+++", function(left) { - warning("W007"); - this.left = left; - this.right = expression(130); - return this; - }, 130); - infix("-", "sub", 130); - prefix("-", "neg"); - prefix("---", function() { - warning("W006"); - this.arity = "unary"; - this.right = expression(150); - return this; - }); - infix("---", function(left) { - warning("W006"); - this.left = left; - this.right = expression(130); - return this; - }, 130); - infix("*", "mult", 140); - infix("/", "div", 140); - infix("%", "mod", 140); - - suffix("++"); - prefix("++", "preinc"); - state.syntax["++"].exps = true; - state.syntax["++"].ltBoundary = "before"; - - suffix("--"); - prefix("--", "predec"); - state.syntax["--"].exps = true; - state.syntax["--"].ltBoundary = "before"; - - prefix("delete", function() { - var p = expression(10); - if (!p) { - return this; - } - - if (p.id !== "." && p.id !== "[") { - warning("W051"); - } - this.first = p; - - // The `delete` operator accepts unresolvable references when not in strict - // mode, so the operand may be undefined. - if (p.identifier && !state.isStrict()) { - p.forgiveUndef = true; - } - return this; - }).exps = true; - - prefix("~", function() { - if (state.option.bitwise) { - warning("W016", this, "~"); - } - this.arity = "unary"; - this.right = expression(150); - return this; - }); - - prefix("...", function() { - if (!state.inES6(true)) { - warning("W119", this, "spread/rest operator", "6"); - } - - // TODO: Allow all AssignmentExpression - // once parsing permits. - // - // How to handle eg. number, boolean when the built-in - // prototype of may have an @@iterator definition? - // - // Number.prototype[Symbol.iterator] = function * () { - // yield this.valueOf(); - // }; - // - // var a = [ ...1 ]; - // console.log(a); // [1]; - // - // for (let n of [...10]) { - // console.log(n); - // } - // // 10 - // - // - // Boolean.prototype[Symbol.iterator] = function * () { - // yield this.valueOf(); - // }; - // - // var a = [ ...true ]; - // console.log(a); // [true]; - // - // for (let n of [...false]) { - // console.log(n); - // } - // // false - // - if (!state.tokens.next.identifier && - state.tokens.next.type !== "(string)" && - !checkPunctuators(state.tokens.next, ["[", "("])) { - - error("E030", state.tokens.next, state.tokens.next.value); - } - this.right = expression(150); - return this; - }); - - prefix("!", function() { - this.arity = "unary"; - this.right = expression(150); - - if (!this.right) { // '!' followed by nothing? Give up. - quit("E041", this); - } - - if (bang[this.right.id] === true) { - warning("W018", this, "!"); - } - return this; - }); - - prefix("typeof", (function() { - var p = expression(150); - this.first = this.right = p; - - if (!p) { // 'typeof' followed by nothing? Give up. - quit("E041", this); - } - - // The `typeof` operator accepts unresolvable references, so the operand - // may be undefined. - if (p.identifier) { - p.forgiveUndef = true; - } - return this; - })); - prefix("new", function() { - var mp = metaProperty("target", function() { - if (!state.inES6(true)) { - warning("W119", state.tokens.prev, "new.target", "6"); - } - var inFunction, c = state.funct; - while (c) { - inFunction = !c["(global)"]; - if (!c["(arrow)"]) { break; } - c = c["(context)"]; - } - if (!inFunction) { - warning("W136", state.tokens.prev, "new.target"); - } - }); - if (mp) { return mp; } - - var c = expression(155), i; - if (c && c.id !== "function") { - if (c.identifier) { - c["new"] = true; - switch (c.value) { - case "Number": - case "String": - case "Boolean": - case "Math": - case "JSON": - warning("W053", state.tokens.prev, c.value); - break; - case "Symbol": - if (state.inES6()) { - warning("W053", state.tokens.prev, c.value); - } - break; - case "Function": - if (!state.option.evil) { - warning("W054"); - } - break; - case "Date": - case "RegExp": - case "this": - break; - default: - if (c.id !== "function") { - i = c.value.substr(0, 1); - if (state.option.newcap && (i < "A" || i > "Z") && - !state.funct["(scope)"].isPredefined(c.value)) { - warning("W055", state.tokens.curr); - } - } - } - } else { - if (c.id !== "." && c.id !== "[" && c.id !== "(") { - warning("W056", state.tokens.curr); - } - } - } else { - if (!state.option.supernew) - warning("W057", this); - } - if (state.tokens.next.id !== "(" && !state.option.supernew) { - warning("W058", state.tokens.curr, state.tokens.curr.value); - } - this.first = this.right = c; - return this; - }); - state.syntax["new"].exps = true; - - prefix("void").exps = true; - - infix(".", function(left, that) { - var m = identifier(false, true); - - if (typeof m === "string") { - countMember(m); - } - - that.left = left; - that.right = m; - - if (m && m === "hasOwnProperty" && state.tokens.next.value === "=") { - warning("W001"); - } - - if (left && left.value === "arguments" && (m === "callee" || m === "caller")) { - if (state.option.noarg) - warning("W059", left, m); - else if (state.isStrict()) - error("E008"); - } else if (!state.option.evil && left && left.value === "document" && - (m === "write" || m === "writeln")) { - warning("W060", left); - } - - if (!state.option.evil && (m === "eval" || m === "execScript")) { - if (isGlobalEval(left, state)) { - warning("W061"); - } - } - - return that; - }, 160, true); - - infix("(", function(left, that) { - if (state.option.immed && left && !left.immed && left.id === "function") { - warning("W062"); - } - - var n = 0; - var p = []; - - if (left) { - if (left.type === "(identifier)") { - if (left.value.match(/^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/)) { - if ("Array Number String Boolean Date Object Error Symbol".indexOf(left.value) === -1) { - if (left.value === "Math") { - warning("W063", left); - } else if (state.option.newcap) { - warning("W064", left); - } - } - } - } - } - - if (state.tokens.next.id !== ")") { - for (;;) { - p[p.length] = expression(10); - n += 1; - if (state.tokens.next.id !== ",") { - break; - } - parseComma(); - } - } - - advance(")"); - - if (typeof left === "object") { - if (!state.inES5() && left.value === "parseInt" && n === 1) { - warning("W065", state.tokens.curr); - } - if (!state.option.evil) { - if (left.value === "eval" || left.value === "Function" || - left.value === "execScript") { - warning("W061", left); - - // This conditional expression was initially implemented with a typo - // which prevented the branch's execution in all cases. While - // enabling the code will produce behavior that is consistent with - // the other forms of code evaluation that follow, such a change is - // also technically incompatable with prior versions of JSHint (due - // to the fact that the behavior was never formally documented). This - // branch should be enabled as part of a major release. - //if (p[0] && p[0].id === "(string)") { - // addEvalCode(left, p[0]); - //} - } else if (p[0] && p[0].id === "(string)" && - (left.value === "setTimeout" || - left.value === "setInterval")) { - warning("W066", left); - addEvalCode(left, p[0]); - - // window.setTimeout/setInterval - } else if (p[0] && p[0].id === "(string)" && - left.value === "." && - left.left.value === "window" && - (left.right === "setTimeout" || - left.right === "setInterval")) { - warning("W066", left); - addEvalCode(left, p[0]); - } - } - if (!left.identifier && left.id !== "." && left.id !== "[" && left.id !== "=>" && - left.id !== "(" && left.id !== "&&" && left.id !== "||" && left.id !== "?" && - !(state.inES6() && left["(name)"])) { - warning("W067", that); - } - } - - that.left = left; - return that; - }, 155, true).exps = true; - - prefix("(", function(rbp) { - var pn = state.tokens.next, pn1, i = -1; - var ret, triggerFnExpr, first, last; - var parens = 1; - var opening = state.tokens.curr; - var preceeding = state.tokens.prev; - var isNecessary = !state.option.singleGroups; - - do { - if (pn.value === "(") { - parens += 1; - } else if (pn.value === ")") { - parens -= 1; - } - - i += 1; - pn1 = pn; - pn = peek(i); - } while (!(parens === 0 && pn1.value === ")") && pn.type !== "(end)"); - - if (state.tokens.next.id === "function") { - triggerFnExpr = state.tokens.next.immed = true; - } - - // If the balanced grouping operator is followed by a "fat arrow", the - // current token marks the beginning of a "fat arrow" function and parsing - // should proceed accordingly. - if (pn.value === "=>") { - return doFunction({ type: "arrow", parsedOpening: true }); - } - - var exprs = []; - - if (state.tokens.next.id !== ")") { - for (;;) { - exprs.push(expression(10)); - - if (state.tokens.next.id !== ",") { - break; - } - - if (state.option.nocomma) { - warning("W127"); - } - - parseComma(); - } - } - - advance(")", this); - if (state.option.immed && exprs[0] && exprs[0].id === "function") { - if (state.tokens.next.id !== "(" && - state.tokens.next.id !== "." && state.tokens.next.id !== "[") { - warning("W068", this); - } - } - - if (!exprs.length) { - return; - } - if (exprs.length > 1) { - ret = Object.create(state.syntax[","]); - ret.exprs = exprs; - - first = exprs[0]; - last = exprs[exprs.length - 1]; - } else { - ret = first = last = exprs[0]; - - if (!isNecessary) { - isNecessary = - // Used to distinguish from an ExpressionStatement which may not - // begin with the `{` and `function` tokens - (opening.beginsStmt && (ret.id === "{" || triggerFnExpr || isFunctor(ret))) || - // Used to signal that a function expression is being supplied to - // some other operator. - (triggerFnExpr && - // For parenthesis wrapping a function expression to be considered - // necessary, the grouping operator should be the left-hand-side of - // some other operator--either within the parenthesis or directly - // following them. - (!isEndOfExpr() || state.tokens.prev.id !== "}")) || - // Used to demarcate an arrow function as the left-hand side of some - // operator. - (isFunctor(ret) && !isEndOfExpr()) || - // Used as the return value of a single-statement arrow function - (ret.id === "{" && preceeding.id === "=>") || - // Used to delineate an integer number literal from a dereferencing - // punctuator (otherwise interpreted as a decimal point) - (ret.type === "(number)" && - checkPunctuator(pn, ".") && /^\d+$/.test(ret.value)) || - // Used to wrap object destructuring assignment - (opening.beginsStmt && ret.id === "=" && ret.left.id === "{"); - } - } - - if (ret) { - // The operator may be necessary to override the default binding power of - // neighboring operators (whenever there is an operator in use within the - // first expression *or* the current group contains multiple expressions) - if (!isNecessary && (isOperator(first) || ret.exprs)) { - isNecessary = - (rbp > first.lbp) || - (rbp > 0 && rbp === first.lbp) || - (!isEndOfExpr() && last.lbp < state.tokens.next.lbp); - } - - if (!isNecessary) { - warning("W126", opening); - } - - ret.paren = true; - } - - return ret; - }); - - application("=>"); - - infix("[", function(left, that) { - var e = expression(10), s; - if (e && e.type === "(string)") { - if (!state.option.evil && (e.value === "eval" || e.value === "execScript")) { - if (isGlobalEval(left, state)) { - warning("W061"); - } - } - - countMember(e.value); - if (!state.option.sub && reg.identifier.test(e.value)) { - s = state.syntax[e.value]; - if (!s || !isReserved(s)) { - warning("W069", state.tokens.prev, e.value); - } - } - } - advance("]", that); - - if (e && e.value === "hasOwnProperty" && state.tokens.next.value === "=") { - warning("W001"); - } - - that.left = left; - that.right = e; - return that; - }, 160, true); - - function comprehensiveArrayExpression() { - var res = {}; - res.exps = true; - state.funct["(comparray)"].stack(); - - // Handle reversed for expressions, used in spidermonkey - var reversed = false; - if (state.tokens.next.value !== "for") { - reversed = true; - if (!state.inMoz()) { - warning("W116", state.tokens.next, "for", state.tokens.next.value); - } - state.funct["(comparray)"].setState("use"); - res.right = expression(10); - } - - advance("for"); - if (state.tokens.next.value === "each") { - advance("each"); - if (!state.inMoz()) { - warning("W118", state.tokens.curr, "for each"); - } - } - advance("("); - state.funct["(comparray)"].setState("define"); - res.left = expression(130); - if (_.contains(["in", "of"], state.tokens.next.value)) { - advance(); - } else { - error("E045", state.tokens.curr); - } - state.funct["(comparray)"].setState("generate"); - expression(10); - - advance(")"); - if (state.tokens.next.value === "if") { - advance("if"); - advance("("); - state.funct["(comparray)"].setState("filter"); - res.filter = expression(10); - advance(")"); - } - - if (!reversed) { - state.funct["(comparray)"].setState("use"); - res.right = expression(10); - } - - advance("]"); - state.funct["(comparray)"].unstack(); - return res; - } - - prefix("[", function() { - var blocktype = lookupBlockType(); - if (blocktype.isCompArray) { - if (!state.option.esnext && !state.inMoz()) { - warning("W118", state.tokens.curr, "array comprehension"); - } - return comprehensiveArrayExpression(); - } else if (blocktype.isDestAssign) { - this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true }); - return this; - } - var b = state.tokens.curr.line !== startLine(state.tokens.next); - this.first = []; - if (b) { - indent += state.option.indent; - if (state.tokens.next.from === indent + state.option.indent) { - indent += state.option.indent; - } - } - while (state.tokens.next.id !== "(end)") { - while (state.tokens.next.id === ",") { - if (!state.option.elision) { - if (!state.inES5()) { - // Maintain compat with old options --- ES5 mode without - // elision=true will warn once per comma - warning("W070"); - } else { - warning("W128"); - do { - advance(","); - } while (state.tokens.next.id === ","); - continue; - } - } - advance(","); - } - - if (state.tokens.next.id === "]") { - break; - } - - this.first.push(expression(10)); - if (state.tokens.next.id === ",") { - parseComma({ allowTrailing: true }); - if (state.tokens.next.id === "]" && !state.inES5()) { - warning("W070", state.tokens.curr); - break; - } - } else { - if (state.option.trailingcomma && state.inES5()) { - warningAt("W140", state.tokens.curr.line, state.tokens.curr.character); - } - break; - } - } - if (b) { - indent -= state.option.indent; - } - advance("]", this); - return this; - }); - - - function isMethod() { - return state.funct["(statement)"] && state.funct["(statement)"].type === "class" || - state.funct["(context)"] && state.funct["(context)"]["(verb)"] === "class"; - } - - - function isPropertyName(token) { - return token.identifier || token.id === "(string)" || token.id === "(number)"; - } - - - function propertyName(preserveOrToken) { - var id; - var preserve = true; - if (typeof preserveOrToken === "object") { - id = preserveOrToken; - } else { - preserve = preserveOrToken; - id = optionalidentifier(false, true, preserve); - } - - if (!id) { - if (state.tokens.next.id === "(string)") { - id = state.tokens.next.value; - if (!preserve) { - advance(); - } - } else if (state.tokens.next.id === "(number)") { - id = state.tokens.next.value.toString(); - if (!preserve) { - advance(); - } - } - } else if (typeof id === "object") { - if (id.id === "(string)" || id.id === "(identifier)") id = id.value; - else if (id.id === "(number)") id = id.value.toString(); - } - - if (id === "hasOwnProperty") { - warning("W001"); - } - - return id; - } - - /** - * @param {Object} [options] - * @param {token} [options.loneArg] The argument to the function in cases - * where it was defined using the - * single-argument shorthand. - * @param {bool} [options.parsedOpening] Whether the opening parenthesis has - * already been parsed. - * @returns {{ arity: number, params: Array.<string>}} - */ - function functionparams(options) { - var next; - var paramsIds = []; - var ident; - var tokens = []; - var t; - var pastDefault = false; - var pastRest = false; - var arity = 0; - var loneArg = options && options.loneArg; - - if (loneArg && loneArg.identifier === true) { - state.funct["(scope)"].addParam(loneArg.value, loneArg); - return { arity: 1, params: [ loneArg.value ] }; - } - - next = state.tokens.next; - - if (!options || !options.parsedOpening) { - advance("("); - } - - if (state.tokens.next.id === ")") { - advance(")"); - return; - } - - function addParam(addParamArgs) { - state.funct["(scope)"].addParam.apply(state.funct["(scope)"], addParamArgs); - } - - for (;;) { - arity++; - // are added to the param scope - var currentParams = []; - - if (_.contains(["{", "["], state.tokens.next.id)) { - tokens = destructuringPattern(); - for (t in tokens) { - t = tokens[t]; - if (t.id) { - paramsIds.push(t.id); - currentParams.push([t.id, t.token]); - } - } - } else { - if (checkPunctuator(state.tokens.next, "...")) pastRest = true; - ident = identifier(true); - if (ident) { - paramsIds.push(ident); - currentParams.push([ident, state.tokens.curr]); - } else { - // Skip invalid parameter. - while (!checkPunctuators(state.tokens.next, [",", ")"])) advance(); - } - } - - // It is valid to have a regular argument after a default argument - // since undefined can be used for missing parameters. Still warn as it is - // a possible code smell. - if (pastDefault) { - if (state.tokens.next.id !== "=") { - error("W138", state.tokens.current); - } - } - if (state.tokens.next.id === "=") { - if (!state.inES6()) { - warning("W119", state.tokens.next, "default parameters", "6"); - } - advance("="); - pastDefault = true; - expression(10); - } - - // now we have evaluated the default expression, add the variable to the param scope - currentParams.forEach(addParam); - - if (state.tokens.next.id === ",") { - if (pastRest) { - warning("W131", state.tokens.next); - } - parseComma(); - } else { - advance(")", next); - return { arity: arity, params: paramsIds }; - } - } - } - - function functor(name, token, overwrites) { - var funct = { - "(name)" : name, - "(breakage)" : 0, - "(loopage)" : 0, - "(tokens)" : {}, - "(properties)": {}, - - "(catch)" : false, - "(global)" : false, - - "(line)" : null, - "(character)" : null, - "(metrics)" : null, - "(statement)" : null, - "(context)" : null, - "(scope)" : null, - "(comparray)" : null, - "(generator)" : null, - "(arrow)" : null, - "(params)" : null - }; - - if (token) { - _.extend(funct, { - "(line)" : token.line, - "(character)": token.character, - "(metrics)" : createMetrics(token) - }); - } - - _.extend(funct, overwrites); - - if (funct["(context)"]) { - funct["(scope)"] = funct["(context)"]["(scope)"]; - funct["(comparray)"] = funct["(context)"]["(comparray)"]; - } - - return funct; - } - - function isFunctor(token) { - return "(scope)" in token; - } - - /** - * Determine if the parser has begun parsing executable code. - * - * @param {Token} funct - The current "functor" token - * - * @returns {boolean} - */ - function hasParsedCode(funct) { - return funct["(global)"] && !funct["(verb)"]; - } - - /** - * This function is used as both a null-denotation method *and* a - * left-denotation method, meaning the first parameter is overloaded. - */ - function doTemplateLiteral(leftOrRbp) { - // ASSERT: this.type === "(template)" - // jshint validthis: true - var ctx = this.context; - var noSubst = this.noSubst; - var depth = this.depth; - var left = typeof leftOrRbp === "number" ? null : leftOrRbp; - - if (!noSubst) { - while (!end()) { - if (!state.tokens.next.template || state.tokens.next.depth > depth) { - expression(0); // should probably have different rbp? - } else { - // skip template start / middle - advance(); - } - } - } - - return { - id: "(template)", - type: "(template)", - tag: left - }; - - function end() { - if (state.tokens.curr.template && state.tokens.curr.tail && - state.tokens.curr.context === ctx) return true; - var complete = (state.tokens.next.template && state.tokens.next.tail && - state.tokens.next.context === ctx); - if (complete) advance(); - return complete || state.tokens.next.isUnclosed; - } - } - - /** - * @param {Object} [options] - * @param {token} [options.name] The identifier belonging to the function (if - * any) - * @param {boolean} [options.statement] The statement that triggered creation - * of the current function. - * @param {string} [options.type] If specified, either "generator" or "arrow" - * @param {token} [options.loneArg] The argument to the function in cases - * where it was defined using the - * single-argument shorthand - * @param {bool} [options.parsedOpening] Whether the opening parenthesis has - * already been parsed - * @param {token} [options.classExprBinding] Define a function with this - * identifier in the new function's - * scope, mimicking the bahavior of - * class expression names within - * the body of member functions. - */ - function doFunction(options) { - var f, token, name, statement, classExprBinding, isGenerator, isArrow, ignoreLoopFunc; - var oldOption = state.option; - var oldIgnored = state.ignored; - - if (options) { - name = options.name; - statement = options.statement; - classExprBinding = options.classExprBinding; - isGenerator = options.type === "generator"; - isArrow = options.type === "arrow"; - ignoreLoopFunc = options.ignoreLoopFunc; - } - - state.option = Object.create(state.option); - state.ignored = Object.create(state.ignored); - - state.funct = functor(name || state.nameStack.infer(), state.tokens.next, { - "(statement)": statement, - "(context)": state.funct, - "(arrow)": isArrow, - "(generator)": isGenerator - }); - - f = state.funct; - token = state.tokens.curr; - token.funct = state.funct; - - functions.push(state.funct); - - // So that the function is available to itself and referencing itself is not - // seen as a closure, add the function name to a new scope, but do not - // test for unused (unused: false) - // it is a new block scope so that params can override it, it can be block scoped - // but declarations inside the function don't cause already declared error - state.funct["(scope)"].stack("functionouter"); - var internallyAccessibleName = name || classExprBinding; - if (internallyAccessibleName) { - state.funct["(scope)"].block.add(internallyAccessibleName, - classExprBinding ? "class" : "function", state.tokens.curr, false); - } - - // create the param scope (params added in functionparams) - state.funct["(scope)"].stack("functionparams"); - - var paramsInfo = functionparams(options); - - if (paramsInfo) { - state.funct["(params)"] = paramsInfo.params; - state.funct["(metrics)"].arity = paramsInfo.arity; - state.funct["(metrics)"].verifyMaxParametersPerFunction(); - } else { - state.funct["(metrics)"].arity = 0; - } - - if (isArrow) { - if (!state.inES6(true)) { - warning("W119", state.tokens.curr, "arrow function syntax (=>)", "6"); - } - - if (!options.loneArg) { - advance("=>"); - } - } - - block(false, true, true, isArrow); - - if (!state.option.noyield && isGenerator && - state.funct["(generator)"] !== "yielded") { - warning("W124", state.tokens.curr); - } - - state.funct["(metrics)"].verifyMaxStatementsPerFunction(); - state.funct["(metrics)"].verifyMaxComplexityPerFunction(); - state.funct["(unusedOption)"] = state.option.unused; - state.option = oldOption; - state.ignored = oldIgnored; - state.funct["(last)"] = state.tokens.curr.line; - state.funct["(lastcharacter)"] = state.tokens.curr.character; - - // unstack the params scope - state.funct["(scope)"].unstack(); // also does usage and label checks - - // unstack the function outer stack - state.funct["(scope)"].unstack(); - - state.funct = state.funct["(context)"]; - - if (!ignoreLoopFunc && !state.option.loopfunc && state.funct["(loopage)"]) { - // If the function we just parsed accesses any non-local variables - // trigger a warning. Otherwise, the function is safe even within - // a loop. - if (f["(isCapturing)"]) { - warning("W083", token); - } - } - - return f; - } - - function createMetrics(functionStartToken) { - return { - statementCount: 0, - nestedBlockDepth: -1, - ComplexityCount: 1, - arity: 0, - - verifyMaxStatementsPerFunction: function() { - if (state.option.maxstatements && - this.statementCount > state.option.maxstatements) { - warning("W071", functionStartToken, this.statementCount); - } - }, - - verifyMaxParametersPerFunction: function() { - if (_.isNumber(state.option.maxparams) && - this.arity > state.option.maxparams) { - warning("W072", functionStartToken, this.arity); - } - }, - - verifyMaxNestedBlockDepthPerFunction: function() { - if (state.option.maxdepth && - this.nestedBlockDepth > 0 && - this.nestedBlockDepth === state.option.maxdepth + 1) { - warning("W073", null, this.nestedBlockDepth); - } - }, - - verifyMaxComplexityPerFunction: function() { - var max = state.option.maxcomplexity; - var cc = this.ComplexityCount; - if (max && cc > max) { - warning("W074", functionStartToken, cc); - } - } - }; - } - - function increaseComplexityCount() { - state.funct["(metrics)"].ComplexityCount += 1; - } - - // Parse assignments that were found instead of conditionals. - // For example: if (a = 1) { ... } - - function checkCondAssignment(expr) { - var id, paren; - if (expr) { - id = expr.id; - paren = expr.paren; - if (id === "," && (expr = expr.exprs[expr.exprs.length - 1])) { - id = expr.id; - paren = paren || expr.paren; - } - } - switch (id) { - case "=": - case "+=": - case "-=": - case "*=": - case "%=": - case "&=": - case "|=": - case "^=": - case "/=": - if (!paren && !state.option.boss) { - warning("W084"); - } - } - } - - /** - * @param {object} props Collection of property descriptors for a given - * object. - */ - function checkProperties(props) { - // Check for lonely setters if in the ES5 mode. - if (state.inES5()) { - for (var name in props) { - if (props[name] && props[name].setterToken && !props[name].getterToken) { - warning("W078", props[name].setterToken); - } - } - } - } - - function metaProperty(name, c) { - if (checkPunctuator(state.tokens.next, ".")) { - var left = state.tokens.curr.id; - advance("."); - var id = identifier(); - state.tokens.curr.isMetaProperty = true; - if (name !== id) { - error("E057", state.tokens.prev, left, id); - } else { - c(); - } - return state.tokens.curr; - } - } - - (function(x) { - x.nud = function() { - var b, f, i, p, t, isGeneratorMethod = false, nextVal; - var props = Object.create(null); // All properties, including accessors - - b = state.tokens.curr.line !== startLine(state.tokens.next); - if (b) { - indent += state.option.indent; - if (state.tokens.next.from === indent + state.option.indent) { - indent += state.option.indent; - } - } - - var blocktype = lookupBlockType(); - if (blocktype.isDestAssign) { - this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true }); - return this; - } - - for (;;) { - if (state.tokens.next.id === "}") { - break; - } - - nextVal = state.tokens.next.value; - if (state.tokens.next.identifier && - (peekIgnoreEOL().id === "," || peekIgnoreEOL().id === "}")) { - if (!state.inES6()) { - warning("W104", state.tokens.next, "object short notation", "6"); - } - i = propertyName(true); - saveProperty(props, i, state.tokens.next); - - expression(10); - - } else if (peek().id !== ":" && (nextVal === "get" || nextVal === "set")) { - advance(nextVal); - - if (!state.inES5()) { - error("E034"); - } - - i = propertyName(); - - // ES6 allows for get() {...} and set() {...} method - // definition shorthand syntax, so we don't produce an error - // if linting ECMAScript 6 code. - if (!i && !state.inES6()) { - error("E035"); - } - - // We don't want to save this getter unless it's an actual getter - // and not an ES6 concise method - if (i) { - saveAccessor(nextVal, props, i, state.tokens.curr); - } - - t = state.tokens.next; - f = doFunction(); - p = f["(params)"]; - - // Don't warn about getter/setter pairs if this is an ES6 concise method - if (nextVal === "get" && i && p) { - warning("W076", t, p[0], i); - } else if (nextVal === "set" && i && f["(metrics)"].arity !== 1) { - warning("W077", t, i); - } - } else { - if (state.tokens.next.value === "*" && state.tokens.next.type === "(punctuator)") { - if (!state.inES6()) { - warning("W104", state.tokens.next, "generator functions", "6"); - } - advance("*"); - isGeneratorMethod = true; - } else { - isGeneratorMethod = false; - } - - if (state.tokens.next.id === "[") { - i = computedPropertyName(); - state.nameStack.set(i); - } else { - state.nameStack.set(state.tokens.next); - i = propertyName(); - saveProperty(props, i, state.tokens.next); - - if (typeof i !== "string") { - break; - } - } - - if (state.tokens.next.value === "(") { - if (!state.inES6()) { - warning("W104", state.tokens.curr, "concise methods", "6"); - } - doFunction({ type: isGeneratorMethod ? "generator" : null }); - } else { - advance(":"); - expression(10); - } - } - - countMember(i); - - if (state.tokens.next.id === ",") { - parseComma({ allowTrailing: true, property: true }); - if (state.tokens.next.id === ",") { - warning("W070", state.tokens.curr); - } else if (state.tokens.next.id === "}" && !state.inES5()) { - warning("W070", state.tokens.curr); - } - } else { - if (state.option.trailingcomma && state.inES5()) { - warningAt("W140", state.tokens.curr.line, state.tokens.curr.character); - } - break; - } - } - if (b) { - indent -= state.option.indent; - } - advance("}", this); - - checkProperties(props); - - return this; - }; - x.fud = function() { - error("E036", state.tokens.curr); - }; - }(delim("{"))); - - function destructuringPattern(options) { - var isAssignment = options && options.assignment; - - if (!state.inES6()) { - warning("W104", state.tokens.curr, - isAssignment ? "destructuring assignment" : "destructuring binding", "6"); - } - - return destructuringPatternRecursive(options); - } - - function destructuringPatternRecursive(options) { - var ids; - var identifiers = []; - var openingParsed = options && options.openingParsed; - var isAssignment = options && options.assignment; - var recursiveOptions = isAssignment ? { assignment: isAssignment } : null; - var firstToken = openingParsed ? state.tokens.curr : state.tokens.next; - - var nextInnerDE = function() { - var ident; - if (checkPunctuators(state.tokens.next, ["[", "{"])) { - ids = destructuringPatternRecursive(recursiveOptions); - for (var id in ids) { - id = ids[id]; - identifiers.push({ id: id.id, token: id.token }); - } - } else if (checkPunctuator(state.tokens.next, ",")) { - identifiers.push({ id: null, token: state.tokens.curr }); - } else if (checkPunctuator(state.tokens.next, "(")) { - advance("("); - nextInnerDE(); - advance(")"); - } else { - var is_rest = checkPunctuator(state.tokens.next, "..."); - - if (isAssignment) { - var assignTarget = expression(20); - if (assignTarget) { - checkLeftSideAssign(assignTarget); - - // if the target was a simple identifier, add it to the list to return - if (assignTarget.identifier) { - ident = assignTarget.value; - } - } - } else { - ident = identifier(); - } - if (ident) { - identifiers.push({ id: ident, token: state.tokens.curr }); - } - return is_rest; - } - return false; - }; - var assignmentProperty = function() { - var id; - if (checkPunctuator(state.tokens.next, "[")) { - advance("["); - expression(10); - advance("]"); - advance(":"); - nextInnerDE(); - } else if (state.tokens.next.id === "(string)" || - state.tokens.next.id === "(number)") { - advance(); - advance(":"); - nextInnerDE(); - } else { - // this id will either be the property name or the property name and the assigning identifier - id = identifier(); - if (checkPunctuator(state.tokens.next, ":")) { - advance(":"); - nextInnerDE(); - } else if (id) { - // in this case we are assigning (not declaring), so check assignment - if (isAssignment) { - checkLeftSideAssign(state.tokens.curr); - } - identifiers.push({ id: id, token: state.tokens.curr }); - } - } - }; - - var id, value; - if (checkPunctuator(firstToken, "[")) { - if (!openingParsed) { - advance("["); - } - if (checkPunctuator(state.tokens.next, "]")) { - warning("W137", state.tokens.curr); - } - var element_after_rest = false; - while (!checkPunctuator(state.tokens.next, "]")) { - if (nextInnerDE() && !element_after_rest && - checkPunctuator(state.tokens.next, ",")) { - warning("W130", state.tokens.next); - element_after_rest = true; - } - if (checkPunctuator(state.tokens.next, "=")) { - if (checkPunctuator(state.tokens.prev, "...")) { - advance("]"); - } else { - advance("="); - } - id = state.tokens.prev; - value = expression(10); - if (value && value.type === "undefined") { - warning("W080", id, id.value); - } - } - if (!checkPunctuator(state.tokens.next, "]")) { - advance(","); - } - } - advance("]"); - } else if (checkPunctuator(firstToken, "{")) { - - if (!openingParsed) { - advance("{"); - } - if (checkPunctuator(state.tokens.next, "}")) { - warning("W137", state.tokens.curr); - } - while (!checkPunctuator(state.tokens.next, "}")) { - assignmentProperty(); - if (checkPunctuator(state.tokens.next, "=")) { - advance("="); - id = state.tokens.prev; - value = expression(10); - if (value && value.type === "undefined") { - warning("W080", id, id.value); - } - } - if (!checkPunctuator(state.tokens.next, "}")) { - advance(","); - if (checkPunctuator(state.tokens.next, "}")) { - // Trailing comma - // ObjectBindingPattern: { BindingPropertyList , } - break; - } - } - } - advance("}"); - } - return identifiers; - } - - function destructuringPatternMatch(tokens, value) { - var first = value.first; - - if (!first) - return; - - _.zip(tokens, Array.isArray(first) ? first : [ first ]).forEach(function(val) { - var token = val[0]; - var value = val[1]; - - if (token && value) - token.first = value; - else if (token && token.first && !value) - warning("W080", token.first, token.first.value); - }); - } - - function blockVariableStatement(type, statement, context) { - // used for both let and const statements - - var prefix = context && context.prefix; - var inexport = context && context.inexport; - var isLet = type === "let"; - var isConst = type === "const"; - var tokens, lone, value, letblock; - - if (!state.inES6()) { - warning("W104", state.tokens.curr, type, "6"); - } - - if (isLet && state.tokens.next.value === "(") { - if (!state.inMoz()) { - warning("W118", state.tokens.next, "let block"); - } - advance("("); - state.funct["(scope)"].stack(); - letblock = true; - } else if (state.funct["(noblockscopedvar)"]) { - error("E048", state.tokens.curr, isConst ? "Const" : "Let"); - } - - statement.first = []; - for (;;) { - var names = []; - if (_.contains(["{", "["], state.tokens.next.value)) { - tokens = destructuringPattern(); - lone = false; - } else { - tokens = [ { id: identifier(), token: state.tokens.curr } ]; - lone = true; - } - - if (!prefix && isConst && state.tokens.next.id !== "=") { - warning("E012", state.tokens.curr, state.tokens.curr.value); - } - - for (var t in tokens) { - if (tokens.hasOwnProperty(t)) { - t = tokens[t]; - if (state.funct["(scope)"].block.isGlobal()) { - if (predefined[t.id] === false) { - warning("W079", t.token, t.id); - } - } - if (t.id && !state.funct["(noblockscopedvar)"]) { - state.funct["(scope)"].addlabel(t.id, { - type: type, - token: t.token }); - names.push(t.token); - } - } - } - - if (state.tokens.next.id === "=") { - advance("="); - if (!prefix && peek(0).id === "=" && state.tokens.next.identifier) { - warning("W120", state.tokens.next, state.tokens.next.value); - } - var id = state.tokens.prev; - // don't accept `in` in expression if prefix is used for ForIn/Of loop. - value = expression(prefix ? 120 : 10); - if (!prefix && value && value.type === "undefined") { - warning("W080", id, id.value); - } - if (lone) { - tokens[0].first = value; - } else { - destructuringPatternMatch(names, value); - } - } - - if (!prefix) { - for (t in tokens) { - if (tokens.hasOwnProperty(t)) { - t = tokens[t]; - state.funct["(scope)"].initialize(t.id); - - if (lone && inexport) { - state.funct["(scope)"].setExported(t.token.value, t.token); - } - } - } - } - - statement.first = statement.first.concat(names); - - if (state.tokens.next.id !== ",") { - break; - } - parseComma(); - } - if (letblock) { - advance(")"); - block(true, true); - statement.block = true; - state.funct["(scope)"].unstack(); - } - - return statement; - } - - var conststatement = stmt("const", function(context) { - return blockVariableStatement("const", this, context); - }); - conststatement.exps = true; - - var letstatement = stmt("let", function(context) { - return blockVariableStatement("let", this, context); - }); - letstatement.exps = true; - - var varstatement = stmt("var", function(context) { - var prefix = context && context.prefix; - var inexport = context && context.inexport; - var tokens, lone, value; - - this.first = []; - for (;;) { - var names = []; - if (_.contains(["{", "["], state.tokens.next.value)) { - tokens = destructuringPattern(); - lone = false; - } else { - tokens = [ { id: identifier(), token: state.tokens.curr } ]; - lone = true; - } - - if (state.option.varstmt) { - warning("W132", this); - } - - this.first = this.first.concat(names); - - for (var t in tokens) { - if (tokens.hasOwnProperty(t)) { - t = tokens[t]; - if (state.funct["(global)"] && !state.impliedClosure()) { - if (predefined[t.id] === false) { - warning("W079", t.token, t.id); - } else if (state.option.futurehostile === false) { - if ((!state.inES5() && vars.ecmaIdentifiers[5][t.id] === false) || - (!state.inES6() && vars.ecmaIdentifiers[6][t.id] === false)) { - warning("W129", t.token, t.id); - } - } - } - if (t.id) { - state.funct["(scope)"].addlabel(t.id, { - type: "var", - token: t.token }); - - if (lone && inexport) { - state.funct["(scope)"].setExported(t.id, t.token); - } - names.push(t.token); - } - } - } - - if (state.tokens.next.id === "=") { - state.nameStack.set(state.tokens.curr); - - advance("="); - if (peek(0).id === "=" && state.tokens.next.identifier) { - if (!prefix && - !state.funct["(params)"] || - state.funct["(params)"].indexOf(state.tokens.next.value) === -1) { - warning("W120", state.tokens.next, state.tokens.next.value); - } - } - var id = state.tokens.prev; - // don't accept `in` in expression if prefix is used for ForIn/Of loop. - value = expression(prefix ? 120 : 10); - if (value && !prefix && !state.funct["(loopage)"] && value.type === "undefined") { - warning("W080", id, id.value); - } - if (lone) { - tokens[0].first = value; - } else { - destructuringPatternMatch(names, value); - } - } - - if (state.tokens.next.id !== ",") { - break; - } - parseComma(); - } - - return this; - }); - varstatement.exps = true; - - blockstmt("class", function(rbp) { - return classdef.call(this, rbp, true); - }); - - function classdef(rbp, isStatement) { - - /*jshint validthis:true */ - if (!state.inES6()) { - warning("W104", state.tokens.curr, "class", "6"); - } - if (isStatement) { - // BindingIdentifier - this.name = identifier(); - - state.funct["(scope)"].addlabel(this.name, { - type: "class", - token: state.tokens.curr }); - - } else if (state.tokens.next.identifier && state.tokens.next.value !== "extends") { - // BindingIdentifier(opt) - this.name = identifier(); - this.namedExpr = true; - } else { - this.name = state.nameStack.infer(); - } - - classtail(this); - - if (isStatement) { - state.funct["(scope)"].initialize(this.name); - } - - return this; - } - - function classtail(c) { - var wasInClassBody = state.inClassBody; - // ClassHeritage(opt) - if (state.tokens.next.value === "extends") { - advance("extends"); - c.heritage = expression(10); - } - - state.inClassBody = true; - advance("{"); - // ClassBody(opt) - c.body = classbody(c); - advance("}"); - state.inClassBody = wasInClassBody; - } - - function classbody(c) { - var name; - var isStatic; - var isGenerator; - var getset; - var props = Object.create(null); - var staticProps = Object.create(null); - var computed; - for (var i = 0; state.tokens.next.id !== "}"; ++i) { - name = state.tokens.next; - isStatic = false; - isGenerator = false; - getset = null; - - // The ES6 grammar for ClassElement includes the `;` token, but it is - // defined only as a placeholder to facilitate future language - // extensions. In ES6 code, it serves no purpose. - if (name.id === ";") { - warning("W032"); - advance(";"); - continue; - } - - if (name.id === "*") { - isGenerator = true; - advance("*"); - name = state.tokens.next; - } - if (name.id === "[") { - name = computedPropertyName(); - computed = true; - } else if (isPropertyName(name)) { - // Non-Computed PropertyName - advance(); - computed = false; - if (name.identifier && name.value === "static") { - if (checkPunctuator(state.tokens.next, "*")) { - isGenerator = true; - advance("*"); - } - if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") { - computed = state.tokens.next.id === "["; - isStatic = true; - name = state.tokens.next; - if (state.tokens.next.id === "[") { - name = computedPropertyName(); - } else advance(); - } - } - - if (name.identifier && (name.value === "get" || name.value === "set")) { - if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") { - computed = state.tokens.next.id === "["; - getset = name; - name = state.tokens.next; - if (state.tokens.next.id === "[") { - name = computedPropertyName(); - } else advance(); - } - } - } else { - warning("W052", state.tokens.next, state.tokens.next.value || state.tokens.next.type); - advance(); - continue; - } - - if (!checkPunctuator(state.tokens.next, "(")) { - // error --- class properties must be methods - error("E054", state.tokens.next, state.tokens.next.value); - while (state.tokens.next.id !== "}" && - !checkPunctuator(state.tokens.next, "(")) { - advance(); - } - if (state.tokens.next.value !== "(") { - doFunction({ statement: c }); - } - } - - if (!computed) { - // We don't know how to determine if we have duplicate computed property names :( - if (getset) { - saveAccessor( - getset.value, isStatic ? staticProps : props, name.value, name, true, isStatic); - } else { - if (name.value === "constructor") { - state.nameStack.set(c); - } else { - state.nameStack.set(name); - } - saveProperty(isStatic ? staticProps : props, name.value, name, true, isStatic); - } - } - - if (getset && name.value === "constructor") { - var propDesc = getset.value === "get" ? "class getter method" : "class setter method"; - error("E049", name, propDesc, "constructor"); - } else if (name.value === "prototype") { - error("E049", name, "class method", "prototype"); - } - - propertyName(name); - - doFunction({ - statement: c, - type: isGenerator ? "generator" : null, - classExprBinding: c.namedExpr ? c.name : null - }); - } - - checkProperties(props); - } - - blockstmt("function", function(context) { - var inexport = context && context.inexport; - var generator = false; - if (state.tokens.next.value === "*") { - advance("*"); - if (state.inES6(true)) { - generator = true; - } else { - warning("W119", state.tokens.curr, "function*", "6"); - } - } - if (inblock) { - warning("W082", state.tokens.curr); - } - var i = optionalidentifier(); - - state.funct["(scope)"].addlabel(i, { - type: "function", - token: state.tokens.curr }); - - if (i === undefined) { - warning("W025"); - } else if (inexport) { - state.funct["(scope)"].setExported(i, state.tokens.prev); - } - - doFunction({ - name: i, - statement: this, - type: generator ? "generator" : null, - ignoreLoopFunc: inblock // a declaration may already have warned - }); - if (state.tokens.next.id === "(" && state.tokens.next.line === state.tokens.curr.line) { - error("E039"); - } - return this; - }); - - prefix("function", function() { - var generator = false; - - if (state.tokens.next.value === "*") { - if (!state.inES6()) { - warning("W119", state.tokens.curr, "function*", "6"); - } - advance("*"); - generator = true; - } - - var i = optionalidentifier(); - doFunction({ name: i, type: generator ? "generator" : null }); - return this; - }); - - blockstmt("if", function() { - var t = state.tokens.next; - increaseComplexityCount(); - state.condition = true; - advance("("); - var expr = expression(0); - - if (!expr) { - quit("E041", this); - } - - checkCondAssignment(expr); - - // When the if is within a for-in loop, check if the condition - // starts with a negation operator - var forinifcheck = null; - if (state.option.forin && state.forinifcheckneeded) { - state.forinifcheckneeded = false; // We only need to analyze the first if inside the loop - forinifcheck = state.forinifchecks[state.forinifchecks.length - 1]; - if (expr.type === "(punctuator)" && expr.value === "!") { - forinifcheck.type = "(negative)"; - } else { - forinifcheck.type = "(positive)"; - } - } - - advance(")", t); - state.condition = false; - var s = block(true, true); - - // When the if is within a for-in loop and the condition has a negative form, - // check if the body contains nothing but a continue statement - if (forinifcheck && forinifcheck.type === "(negative)") { - if (s && s[0] && s[0].type === "(identifier)" && s[0].value === "continue") { - forinifcheck.type = "(negative-with-continue)"; - } - } - - if (state.tokens.next.id === "else") { - advance("else"); - if (state.tokens.next.id === "if" || state.tokens.next.id === "switch") { - statement(); - } else { - block(true, true); - } - } - return this; - }); - - blockstmt("try", function() { - var b; - - function doCatch() { - advance("catch"); - advance("("); - - state.funct["(scope)"].stack("catchparams"); - - if (checkPunctuators(state.tokens.next, ["[", "{"])) { - var tokens = destructuringPattern(); - _.each(tokens, function(token) { - if (token.id) { - state.funct["(scope)"].addParam(token.id, token, "exception"); - } - }); - } else if (state.tokens.next.type !== "(identifier)") { - warning("E030", state.tokens.next, state.tokens.next.value); - } else { - // only advance if we have an identifier so we can continue parsing in the most common error - that no param is given. - state.funct["(scope)"].addParam(identifier(), state.tokens.curr, "exception"); - } - - if (state.tokens.next.value === "if") { - if (!state.inMoz()) { - warning("W118", state.tokens.curr, "catch filter"); - } - advance("if"); - expression(0); - } - - advance(")"); - - block(false); - - state.funct["(scope)"].unstack(); - } - - block(true); - - while (state.tokens.next.id === "catch") { - increaseComplexityCount(); - if (b && (!state.inMoz())) { - warning("W118", state.tokens.next, "multiple catch blocks"); - } - doCatch(); - b = true; - } - - if (state.tokens.next.id === "finally") { - advance("finally"); - block(true); - return; - } - - if (!b) { - error("E021", state.tokens.next, "catch", state.tokens.next.value); - } - - return this; - }); - - blockstmt("while", function() { - var t = state.tokens.next; - state.funct["(breakage)"] += 1; - state.funct["(loopage)"] += 1; - increaseComplexityCount(); - advance("("); - checkCondAssignment(expression(0)); - advance(")", t); - block(true, true); - state.funct["(breakage)"] -= 1; - state.funct["(loopage)"] -= 1; - return this; - }).labelled = true; - - blockstmt("with", function() { - var t = state.tokens.next; - if (state.isStrict()) { - error("E010", state.tokens.curr); - } else if (!state.option.withstmt) { - warning("W085", state.tokens.curr); - } - - advance("("); - expression(0); - advance(")", t); - block(true, true); - - return this; - }); - - blockstmt("switch", function() { - var t = state.tokens.next; - var g = false; - var noindent = false; - - state.funct["(breakage)"] += 1; - advance("("); - checkCondAssignment(expression(0)); - advance(")", t); - t = state.tokens.next; - advance("{"); - - if (state.tokens.next.from === indent) - noindent = true; - - if (!noindent) - indent += state.option.indent; - - this.cases = []; - - for (;;) { - switch (state.tokens.next.id) { - case "case": - switch (state.funct["(verb)"]) { - case "yield": - case "break": - case "case": - case "continue": - case "return": - case "switch": - case "throw": - break; - default: - // You can tell JSHint that you don't use break intentionally by - // adding a comment /* falls through */ on a line just before - // the next `case`. - if (!state.tokens.curr.caseFallsThrough) { - warning("W086", state.tokens.curr, "case"); - } - } - - advance("case"); - this.cases.push(expression(0)); - increaseComplexityCount(); - g = true; - advance(":"); - state.funct["(verb)"] = "case"; - break; - case "default": - switch (state.funct["(verb)"]) { - case "yield": - case "break": - case "continue": - case "return": - case "throw": - break; - default: - // Do not display a warning if 'default' is the first statement or if - // there is a special /* falls through */ comment. - if (this.cases.length) { - if (!state.tokens.curr.caseFallsThrough) { - warning("W086", state.tokens.curr, "default"); - } - } - } - - advance("default"); - g = true; - advance(":"); - break; - case "}": - if (!noindent) - indent -= state.option.indent; - - advance("}", t); - state.funct["(breakage)"] -= 1; - state.funct["(verb)"] = undefined; - return; - case "(end)": - error("E023", state.tokens.next, "}"); - return; - default: - indent += state.option.indent; - if (g) { - switch (state.tokens.curr.id) { - case ",": - error("E040"); - return; - case ":": - g = false; - statements(); - break; - default: - error("E025", state.tokens.curr); - return; - } - } else { - if (state.tokens.curr.id === ":") { - advance(":"); - error("E024", state.tokens.curr, ":"); - statements(); - } else { - error("E021", state.tokens.next, "case", state.tokens.next.value); - return; - } - } - indent -= state.option.indent; - } - } - return this; - }).labelled = true; - - stmt("debugger", function() { - if (!state.option.debug) { - warning("W087", this); - } - return this; - }).exps = true; - - (function() { - var x = stmt("do", function() { - state.funct["(breakage)"] += 1; - state.funct["(loopage)"] += 1; - increaseComplexityCount(); - - this.first = block(true, true); - advance("while"); - var t = state.tokens.next; - advance("("); - checkCondAssignment(expression(0)); - advance(")", t); - state.funct["(breakage)"] -= 1; - state.funct["(loopage)"] -= 1; - return this; - }); - x.labelled = true; - x.exps = true; - }()); - - blockstmt("for", function() { - var s, t = state.tokens.next; - var letscope = false; - var foreachtok = null; - - if (t.value === "each") { - foreachtok = t; - advance("each"); - if (!state.inMoz()) { - warning("W118", state.tokens.curr, "for each"); - } - } - - increaseComplexityCount(); - advance("("); - - // what kind of for(…) statement it is? for(…of…)? for(…in…)? for(…;…;…)? - var nextop; // contains the token of the "in" or "of" operator - var i = 0; - var inof = ["in", "of"]; - var level = 0; // BindingPattern "level" --- level 0 === no BindingPattern - var comma; // First comma punctuator at level 0 - var initializer; // First initializer at level 0 - var bindingPower; - var targets; - var target; - - // If initial token is a BindingPattern, count it as such. - if (checkPunctuators(state.tokens.next, ["{", "["])) ++level; - do { - nextop = peek(i); - ++i; - if (checkPunctuators(nextop, ["{", "["])) ++level; - else if (checkPunctuators(nextop, ["}", "]"])) --level; - if (level < 0) break; - if (level === 0) { - if (!comma && checkPunctuator(nextop, ",")) comma = nextop; - else if (!initializer && checkPunctuator(nextop, "=")) initializer = nextop; - } - } while (level > 0 || !_.contains(inof, nextop.value) && nextop.value !== ";" && - nextop.type !== "(end)"); // Is this a JSCS bug? This looks really weird. - - // if we're in a for (… in|of …) statement - if (_.contains(inof, nextop.value)) { - if (nextop.value === "of") { - bindingPower = 20; - if (!state.inES6()) { - warning("W104", nextop, "for of", "6"); - } - } else { - bindingPower = 0; - } - - if (initializer) { - error("W133", comma, nextop.value, "initializer is forbidden"); - } - - if (comma) { - error("W133", comma, nextop.value, "more than one ForBinding"); - } - - if (state.tokens.next.id === "var") { - advance("var"); - state.tokens.curr.fud({ prefix: true }); - } else if (state.tokens.next.id === "let" || state.tokens.next.id === "const") { - advance(state.tokens.next.id); - // create a new block scope - letscope = true; - state.funct["(scope)"].stack(); - state.tokens.curr.fud({ prefix: true }); - } else { - targets = []; - - // The following parsing logic recognizes initializers and the comma - // operator despite the fact that they are not supported by the - // grammar. Doing so allows JSHint to emit more a meaningful error - // message (i.e. W133) in response to a common programming mistake. - do { - if (checkPunctuators(state.tokens.next, ["{", "["])) { - destructuringPattern({ assignment: true }).forEach(function(elem) { - this.push(elem.token); - }, targets); - } else { - target = expression(120); - - if (target.type === "(identifier)") { - targets.push(target); - } - - checkLeftSideAssign(target, nextop); - } - - if (checkPunctuator(state.tokens.next, "=")) { - advance("="); - expression(120); - } - - if (checkPunctuator(state.tokens.next, ",")) { - advance(","); - } - } while (state.tokens.next !== nextop); - - // In the event of a syntax error, do no issue warnings regarding the - // implicit creation of bindings. - if (!initializer && !comma) { - targets.forEach(function(token) { - if (!state.funct["(scope)"].has(token.value)) { - warning("W088", token, token.value); - } - }); - } - } - - advance(nextop.value); - // The binding power is variable because for-in statements accept any - // Expression in this position, while for-of statements are limited to - // AssignmentExpressions. For example: - // - // for ( LeftHandSideExpression in Expression ) Statement - // for ( LeftHandSideExpression of AssignmentExpression ) Statement - expression(bindingPower); - advance(")", t); - - if (nextop.value === "in" && state.option.forin) { - state.forinifcheckneeded = true; - - if (state.forinifchecks === undefined) { - state.forinifchecks = []; - } - - // Push a new for-in-if check onto the stack. The type will be modified - // when the loop's body is parsed and a suitable if statement exists. - state.forinifchecks.push({ - type: "(none)" - }); - } - - state.funct["(breakage)"] += 1; - state.funct["(loopage)"] += 1; - - s = block(true, true); - - if (nextop.value === "in" && state.option.forin) { - if (state.forinifchecks && state.forinifchecks.length > 0) { - var check = state.forinifchecks.pop(); - - if (// No if statement or not the first statement in loop body - s && s.length > 0 && (typeof s[0] !== "object" || s[0].value !== "if") || - // Positive if statement is not the only one in loop body - check.type === "(positive)" && s.length > 1 || - // Negative if statement but no continue - check.type === "(negative)") { - warning("W089", this); - } - } - - // Reset the flag in case no if statement was contained in the loop body - state.forinifcheckneeded = false; - } - - state.funct["(breakage)"] -= 1; - state.funct["(loopage)"] -= 1; - } else { - if (foreachtok) { - error("E045", foreachtok); - } - if (state.tokens.next.id !== ";") { - if (state.tokens.next.id === "var") { - advance("var"); - state.tokens.curr.fud(); - } else if (state.tokens.next.id === "let") { - advance("let"); - // create a new block scope - letscope = true; - state.funct["(scope)"].stack(); - state.tokens.curr.fud(); - } else { - for (;;) { - expression(0, "for"); - if (state.tokens.next.id !== ",") { - break; - } - parseComma(); - } - } - } - nolinebreak(state.tokens.curr); - advance(";"); - - // start loopage after the first ; as the next two expressions are executed - // on every loop - state.funct["(loopage)"] += 1; - if (state.tokens.next.id !== ";") { - checkCondAssignment(expression(0)); - } - nolinebreak(state.tokens.curr); - advance(";"); - if (state.tokens.next.id === ";") { - error("E021", state.tokens.next, ")", ";"); - } - if (state.tokens.next.id !== ")") { - for (;;) { - expression(0, "for"); - if (state.tokens.next.id !== ",") { - break; - } - parseComma(); - } - } - advance(")", t); - state.funct["(breakage)"] += 1; - block(true, true); - state.funct["(breakage)"] -= 1; - state.funct["(loopage)"] -= 1; - - } - // unstack loop blockscope - if (letscope) { - state.funct["(scope)"].unstack(); - } - return this; - }).labelled = true; - - - stmt("break", function() { - var v = state.tokens.next.value; - - if (!state.option.asi) - nolinebreak(this); - - if (state.tokens.next.id !== ";" && !state.tokens.next.reach && - state.tokens.curr.line === startLine(state.tokens.next)) { - if (!state.funct["(scope)"].funct.hasBreakLabel(v)) { - warning("W090", state.tokens.next, v); - } - this.first = state.tokens.next; - advance(); - } else { - if (state.funct["(breakage)"] === 0) - warning("W052", state.tokens.next, this.value); - } - - reachable(this); - - return this; - }).exps = true; - - - stmt("continue", function() { - var v = state.tokens.next.value; - - if (state.funct["(breakage)"] === 0 || !state.funct["(loopage)"]) { - warning("W052", state.tokens.next, this.value); - } - - if (!state.option.asi) - nolinebreak(this); - - if (state.tokens.next.id !== ";" && !state.tokens.next.reach) { - if (state.tokens.curr.line === startLine(state.tokens.next)) { - if (!state.funct["(scope)"].funct.hasBreakLabel(v)) { - warning("W090", state.tokens.next, v); - } - this.first = state.tokens.next; - advance(); - } - } - - reachable(this); - - return this; - }).exps = true; - - - stmt("return", function() { - if (this.line === startLine(state.tokens.next)) { - if (state.tokens.next.id !== ";" && !state.tokens.next.reach) { - this.first = expression(0); - - if (this.first && - this.first.type === "(punctuator)" && this.first.value === "=" && - !this.first.paren && !state.option.boss) { - warningAt("W093", this.first.line, this.first.character); - } - } - } else { - if (state.tokens.next.type === "(punctuator)" && - ["[", "{", "+", "-"].indexOf(state.tokens.next.value) > -1) { - nolinebreak(this); // always warn (Line breaking error) - } - } - - reachable(this); - - return this; - }).exps = true; - - (function(x) { - x.exps = true; - x.lbp = 25; - x.ltBoundary = "after"; - }(prefix("yield", function() { - if (state.inMoz()) { - return mozYield.call(this); - } - var prev = state.tokens.prev; - - if (!this.beginsStmt && prev.lbp > 30 && !checkPunctuators(prev, ["("])) { - error("E061", this); - } - - if (state.inES6(true) && !state.funct["(generator)"]) { - // If it's a yield within a catch clause inside a generator then that's ok - if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) { - error("E046", state.tokens.curr, "yield"); - } - } else if (!state.inES6()) { - warning("W104", state.tokens.curr, "yield", "6"); - } - state.funct["(generator)"] = "yielded"; - var delegatingYield = false; - - if (state.tokens.next.value === "*") { - delegatingYield = true; - advance("*"); - } - - // Parse operand - if (!isEndOfExpr() && state.tokens.next.id !== ",") { - if (state.tokens.next.nud) { - - nobreaknonadjacent(state.tokens.curr, state.tokens.next); - this.first = expression(10); - - if (this.first.type === "(punctuator)" && this.first.value === "=" && - !this.first.paren && !state.option.boss) { - warningAt("W093", this.first.line, this.first.character); - } - } else if (state.tokens.next.led) { - if (state.tokens.next.id !== ",") { - error("W017", state.tokens.next); - } - } - } - - return this; - }))); - - /** - * Parsing logic for non-standard Mozilla implementation of `yield` - * expressions. - */ - var mozYield = function() { - var prev = state.tokens.prev; - if (state.inES6(true) && !state.funct["(generator)"]) { - // If it's a yield within a catch clause inside a generator then that's ok - if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) { - error("E046", state.tokens.curr, "yield"); - } - } - state.funct["(generator)"] = "yielded"; - var delegatingYield = false; - - if (state.tokens.next.value === "*") { - delegatingYield = true; - advance("*"); - } - - if (this.line === startLine(state.tokens.next)) { - if (delegatingYield || - (state.tokens.next.id !== ";" && !state.option.asi && - !state.tokens.next.reach && state.tokens.next.nud)) { - - nobreaknonadjacent(state.tokens.curr, state.tokens.next); - this.first = expression(10); - - if (this.first.type === "(punctuator)" && this.first.value === "=" && - !this.first.paren && !state.option.boss) { - warningAt("W093", this.first.line, this.first.character); - } - } - - if (state.tokens.next.id !== ")" && - (prev.lbp > 30 || (!prev.assign && !isEndOfExpr()) || prev.id === "yield")) { - error("E050", this); - } - } else if (!state.option.asi) { - nolinebreak(this); // always warn (Line breaking error) - } - return this; - }; - - stmt("throw", function() { - nolinebreak(this); - this.first = expression(20); - - reachable(this); - - return this; - }).exps = true; - - stmt("import", function() { - if (!state.funct["(scope)"].block.isGlobal()) { - error("E053", state.tokens.curr, "Import"); - } - - if (!state.inES6()) { - warning("W119", state.tokens.curr, "import", "6"); - } - - if (state.tokens.next.type === "(string)") { - // ModuleSpecifier :: StringLiteral - advance("(string)"); - return this; - } - - if (state.tokens.next.identifier) { - // ImportClause :: ImportedDefaultBinding - this.name = identifier(); - // Import bindings are immutable (see ES6 8.1.1.5.5) - state.funct["(scope)"].addlabel(this.name, { - type: "import", - initialized: true, - token: state.tokens.curr }); - - if (state.tokens.next.value === ",") { - // ImportClause :: ImportedDefaultBinding , NameSpaceImport - // ImportClause :: ImportedDefaultBinding , NamedImports - advance(","); - // At this point, we intentionally fall through to continue matching - // either NameSpaceImport or NamedImports. - // Discussion: - // https://github.com/jshint/jshint/pull/2144#discussion_r23978406 - } else { - advance("from"); - advance("(string)"); - return this; - } - } - - if (state.tokens.next.id === "*") { - // ImportClause :: NameSpaceImport - advance("*"); - advance("as"); - if (state.tokens.next.identifier) { - this.name = identifier(); - // Import bindings are immutable (see ES6 8.1.1.5.5) - state.funct["(scope)"].addlabel(this.name, { - type: "import", - initialized: true, - token: state.tokens.curr }); - } - } else { - // ImportClause :: NamedImports - advance("{"); - for (;;) { - if (state.tokens.next.value === "}") { - advance("}"); - break; - } - var importName; - if (state.tokens.next.type === "default") { - importName = "default"; - advance("default"); - } else { - importName = identifier(); - } - if (state.tokens.next.value === "as") { - advance("as"); - importName = identifier(); - } - - // Import bindings are immutable (see ES6 8.1.1.5.5) - state.funct["(scope)"].addlabel(importName, { - type: "import", - initialized: true, - token: state.tokens.curr }); - - if (state.tokens.next.value === ",") { - advance(","); - } else if (state.tokens.next.value === "}") { - advance("}"); - break; - } else { - error("E024", state.tokens.next, state.tokens.next.value); - break; - } - } - } - - // FromClause - advance("from"); - advance("(string)"); - return this; - }).exps = true; - - stmt("export", function() { - var ok = true; - var token; - var identifier; - - if (!state.inES6()) { - warning("W119", state.tokens.curr, "export", "6"); - ok = false; - } - - if (!state.funct["(scope)"].block.isGlobal()) { - error("E053", state.tokens.curr, "Export"); - ok = false; - } - - if (state.tokens.next.value === "*") { - // ExportDeclaration :: export * FromClause - advance("*"); - advance("from"); - advance("(string)"); - return this; - } - - if (state.tokens.next.type === "default") { - // ExportDeclaration :: - // export default [lookahead ∉ { function, class }] AssignmentExpression[In] ; - // export default HoistableDeclaration - // export default ClassDeclaration - state.nameStack.set(state.tokens.next); - advance("default"); - var exportType = state.tokens.next.id; - if (exportType === "function" || exportType === "class") { - this.block = true; - } - - token = peek(); - - expression(10); - - identifier = token.value; - - if (this.block) { - state.funct["(scope)"].addlabel(identifier, { - type: exportType, - initialized: true, - token: token }); - - state.funct["(scope)"].setExported(identifier, token); - } - - return this; - } - - if (state.tokens.next.value === "{") { - // ExportDeclaration :: export ExportClause - advance("{"); - var exportedTokens = []; - for (;;) { - if (!state.tokens.next.identifier) { - error("E030", state.tokens.next, state.tokens.next.value); - } - advance(); - - exportedTokens.push(state.tokens.curr); - - if (state.tokens.next.value === "as") { - advance("as"); - if (!state.tokens.next.identifier) { - error("E030", state.tokens.next, state.tokens.next.value); - } - advance(); - } - - if (state.tokens.next.value === ",") { - advance(","); - } else if (state.tokens.next.value === "}") { - advance("}"); - break; - } else { - error("E024", state.tokens.next, state.tokens.next.value); - break; - } - } - if (state.tokens.next.value === "from") { - // ExportDeclaration :: export ExportClause FromClause - advance("from"); - advance("(string)"); - } else if (ok) { - exportedTokens.forEach(function(token) { - state.funct["(scope)"].setExported(token.value, token); - }); - } - return this; - } - - if (state.tokens.next.id === "var") { - // ExportDeclaration :: export VariableStatement - advance("var"); - state.tokens.curr.fud({ inexport:true }); - } else if (state.tokens.next.id === "let") { - // ExportDeclaration :: export VariableStatement - advance("let"); - state.tokens.curr.fud({ inexport:true }); - } else if (state.tokens.next.id === "const") { - // ExportDeclaration :: export VariableStatement - advance("const"); - state.tokens.curr.fud({ inexport:true }); - } else if (state.tokens.next.id === "function") { - // ExportDeclaration :: export Declaration - this.block = true; - advance("function"); - state.syntax["function"].fud({ inexport:true }); - } else if (state.tokens.next.id === "class") { - // ExportDeclaration :: export Declaration - this.block = true; - advance("class"); - var classNameToken = state.tokens.next; - state.syntax["class"].fud(); - state.funct["(scope)"].setExported(classNameToken.value, classNameToken); - } else { - error("E024", state.tokens.next, state.tokens.next.value); - } - - return this; - }).exps = true; - - // Future Reserved Words - - FutureReservedWord("abstract"); - FutureReservedWord("await", { es5: true, moduleOnly: true }); - FutureReservedWord("boolean"); - FutureReservedWord("byte"); - FutureReservedWord("char"); - FutureReservedWord("class", { es5: true, nud: classdef }); - FutureReservedWord("double"); - FutureReservedWord("enum", { es5: true }); - FutureReservedWord("export", { es5: true }); - FutureReservedWord("extends", { es5: true }); - FutureReservedWord("final"); - FutureReservedWord("float"); - FutureReservedWord("goto"); - FutureReservedWord("implements", { es5: true, strictOnly: true }); - FutureReservedWord("import", { es5: true }); - FutureReservedWord("int"); - FutureReservedWord("interface", { es5: true, strictOnly: true }); - FutureReservedWord("long"); - FutureReservedWord("native"); - FutureReservedWord("package", { es5: true, strictOnly: true }); - FutureReservedWord("private", { es5: true, strictOnly: true }); - FutureReservedWord("protected", { es5: true, strictOnly: true }); - FutureReservedWord("public", { es5: true, strictOnly: true }); - FutureReservedWord("short"); - FutureReservedWord("static", { es5: true, strictOnly: true }); - FutureReservedWord("super", { es5: true }); - FutureReservedWord("synchronized"); - FutureReservedWord("transient"); - FutureReservedWord("volatile"); - - // this function is used to determine whether a squarebracket or a curlybracket - // expression is a comprehension array, destructuring assignment or a json value. - - var lookupBlockType = function() { - var pn, pn1, prev; - var i = -1; - var bracketStack = 0; - var ret = {}; - if (checkPunctuators(state.tokens.curr, ["[", "{"])) { - bracketStack += 1; - } - do { - prev = i === -1 ? state.tokens.curr : pn; - pn = i === -1 ? state.tokens.next : peek(i); - pn1 = peek(i + 1); - i = i + 1; - if (checkPunctuators(pn, ["[", "{"])) { - bracketStack += 1; - } else if (checkPunctuators(pn, ["]", "}"])) { - bracketStack -= 1; - } - if (bracketStack === 1 && pn.identifier && pn.value === "for" && - !checkPunctuator(prev, ".")) { - ret.isCompArray = true; - ret.notJson = true; - break; - } - if (bracketStack === 0 && checkPunctuators(pn, ["}", "]"])) { - if (pn1.value === "=") { - ret.isDestAssign = true; - ret.notJson = true; - break; - } else if (pn1.value === ".") { - ret.notJson = true; - break; - } - } - if (checkPunctuator(pn, ";")) { - ret.isBlock = true; - ret.notJson = true; - } - } while (bracketStack > 0 && pn.id !== "(end)"); - return ret; - }; - - function saveProperty(props, name, tkn, isClass, isStatic) { - var msg = ["key", "class method", "static class method"]; - msg = msg[(isClass || false) + (isStatic || false)]; - if (tkn.identifier) { - name = tkn.value; - } - - if (props[name] && name !== "__proto__") { - warning("W075", state.tokens.next, msg, name); - } else { - props[name] = Object.create(null); - } - - props[name].basic = true; - props[name].basictkn = tkn; - } - - /** - * @param {string} accessorType - Either "get" or "set" - * @param {object} props - a collection of all properties of the object to - * which the current accessor is being assigned - * @param {object} tkn - the identifier token representing the accessor name - * @param {boolean} isClass - whether the accessor is part of an ES6 Class - * definition - * @param {boolean} isStatic - whether the accessor is a static method - */ - function saveAccessor(accessorType, props, name, tkn, isClass, isStatic) { - var flagName = accessorType === "get" ? "getterToken" : "setterToken"; - var msg = ""; - - if (isClass) { - if (isStatic) { - msg += "static "; - } - msg += accessorType + "ter method"; - } else { - msg = "key"; - } - - state.tokens.curr.accessorType = accessorType; - state.nameStack.set(tkn); - - if (props[name]) { - if ((props[name].basic || props[name][flagName]) && name !== "__proto__") { - warning("W075", state.tokens.next, msg, name); - } - } else { - props[name] = Object.create(null); - } - - props[name][flagName] = tkn; - } - - function computedPropertyName() { - advance("["); - if (!state.inES6()) { - warning("W119", state.tokens.curr, "computed property names", "6"); - } - var value = expression(10); - advance("]"); - return value; - } - - /** - * Test whether a given token is a punctuator matching one of the specified values - * @param {Token} token - * @param {Array.<string>} values - * @returns {boolean} - */ - function checkPunctuators(token, values) { - if (token.type === "(punctuator)") { - return _.contains(values, token.value); - } - return false; - } - - /** - * Test whether a given token is a punctuator matching the specified value - * @param {Token} token - * @param {string} value - * @returns {boolean} - */ - function checkPunctuator(token, value) { - return token.type === "(punctuator)" && token.value === value; - } - - // Check whether this function has been reached for a destructuring assign with undeclared values - function destructuringAssignOrJsonValue() { - // lookup for the assignment (ECMAScript 6 only) - // if it has semicolons, it is a block, so go parse it as a block - // or it's not a block, but there are assignments, check for undeclared variables - - var block = lookupBlockType(); - if (block.notJson) { - if (!state.inES6() && block.isDestAssign) { - warning("W104", state.tokens.curr, "destructuring assignment", "6"); - } - statements(); - // otherwise parse json value - } else { - state.option.laxbreak = true; - state.jsonMode = true; - jsonValue(); - } - } - - // array comprehension parsing function - // parses and defines the three states of the list comprehension in order - // to avoid defining global variables, but keeping them to the list comprehension scope - // only. The order of the states are as follows: - // * "use" which will be the returned iterative part of the list comprehension - // * "define" which will define the variables local to the list comprehension - // * "filter" which will help filter out values - - var arrayComprehension = function() { - var CompArray = function() { - this.mode = "use"; - this.variables = []; - }; - var _carrays = []; - var _current; - function declare(v) { - var l = _current.variables.filter(function(elt) { - // if it has, change its undef state - if (elt.value === v) { - elt.undef = false; - return v; - } - }).length; - return l !== 0; - } - function use(v) { - var l = _current.variables.filter(function(elt) { - // and if it has been defined - if (elt.value === v && !elt.undef) { - if (elt.unused === true) { - elt.unused = false; - } - return v; - } - }).length; - // otherwise we warn about it - return (l === 0); - } - return { stack: function() { - _current = new CompArray(); - _carrays.push(_current); - }, - unstack: function() { - _current.variables.filter(function(v) { - if (v.unused) - warning("W098", v.token, v.raw_text || v.value); - if (v.undef) - state.funct["(scope)"].block.use(v.value, v.token); - }); - _carrays.splice(-1, 1); - _current = _carrays[_carrays.length - 1]; - }, - setState: function(s) { - if (_.contains(["use", "define", "generate", "filter"], s)) - _current.mode = s; - }, - check: function(v) { - if (!_current) { - return; - } - // When we are in "use" state of the list comp, we enqueue that var - if (_current && _current.mode === "use") { - if (use(v)) { - _current.variables.push({ - funct: state.funct, - token: state.tokens.curr, - value: v, - undef: true, - unused: false - }); - } - return true; - // When we are in "define" state of the list comp, - } else if (_current && _current.mode === "define") { - // check if the variable has been used previously - if (!declare(v)) { - _current.variables.push({ - funct: state.funct, - token: state.tokens.curr, - value: v, - undef: false, - unused: true - }); - } - return true; - // When we are in the "generate" state of the list comp, - } else if (_current && _current.mode === "generate") { - state.funct["(scope)"].block.use(v, state.tokens.curr); - return true; - // When we are in "filter" state, - } else if (_current && _current.mode === "filter") { - // we check whether current variable has been declared - if (use(v)) { - // if not we warn about it - state.funct["(scope)"].block.use(v, state.tokens.curr); - } - return true; - } - return false; - } - }; - }; - - - // Parse JSON - - function jsonValue() { - function jsonObject() { - var o = {}, t = state.tokens.next; - advance("{"); - if (state.tokens.next.id !== "}") { - for (;;) { - if (state.tokens.next.id === "(end)") { - error("E026", state.tokens.next, t.line); - } else if (state.tokens.next.id === "}") { - warning("W094", state.tokens.curr); - break; - } else if (state.tokens.next.id === ",") { - error("E028", state.tokens.next); - } else if (state.tokens.next.id !== "(string)") { - warning("W095", state.tokens.next, state.tokens.next.value); - } - if (o[state.tokens.next.value] === true) { - warning("W075", state.tokens.next, "key", state.tokens.next.value); - } else if ((state.tokens.next.value === "__proto__" && - !state.option.proto) || (state.tokens.next.value === "__iterator__" && - !state.option.iterator)) { - warning("W096", state.tokens.next, state.tokens.next.value); - } else { - o[state.tokens.next.value] = true; - } - advance(); - advance(":"); - jsonValue(); - if (state.tokens.next.id !== ",") { - break; - } - advance(","); - } - } - advance("}"); - } - - function jsonArray() { - var t = state.tokens.next; - advance("["); - if (state.tokens.next.id !== "]") { - for (;;) { - if (state.tokens.next.id === "(end)") { - error("E027", state.tokens.next, t.line); - } else if (state.tokens.next.id === "]") { - warning("W094", state.tokens.curr); - break; - } else if (state.tokens.next.id === ",") { - error("E028", state.tokens.next); - } - jsonValue(); - if (state.tokens.next.id !== ",") { - break; - } - advance(","); - } - } - advance("]"); - } - - switch (state.tokens.next.id) { - case "{": - jsonObject(); - break; - case "[": - jsonArray(); - break; - case "true": - case "false": - case "null": - case "(number)": - case "(string)": - advance(); - break; - case "-": - advance("-"); - advance("(number)"); - break; - default: - error("E003", state.tokens.next); - } - } - - /** - * Lint dynamically-evaluated code, appending any resulting errors/warnings - * into the global `errors` array. - * - * @param {array} internals - collection of "internals" objects describing - * string tokens that contain evaluated code - * @param {object} options - linting options to apply - * @param {object} globals - globally-defined bindings for the evaluated code - */ - function lintEvalCode(internals, options, globals) { - var priorErrorCount, idx, jdx, internal; - - for (idx = 0; idx < internals.length; idx += 1) { - internal = internals[idx]; - options.scope = internal.elem; - priorErrorCount = JSHINT.errors.length; - - itself(internal.code, options, globals); - - for (jdx = priorErrorCount; jdx < JSHINT.errors.length; jdx += 1) { - JSHINT.errors[jdx].line += internal.token.line - 1; - } - } - } - - var escapeRegex = function(str) { - return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&"); - }; - - // The actual JSHINT function itself. - var itself = function(s, o, g) { - var x, reIgnoreStr, reIgnore; - var optionKeys; - var newOptionObj = {}; - var newIgnoredObj = {}; - - o = _.clone(o); - state.reset(); - - if (o && o.scope) { - JSHINT.scope = o.scope; - } else { - JSHINT.errors = []; - JSHINT.undefs = []; - JSHINT.internals = []; - JSHINT.blacklist = {}; - JSHINT.scope = "(main)"; - } - - predefined = Object.create(null); - combine(predefined, vars.ecmaIdentifiers[3]); - combine(predefined, vars.reservedVars); - - combine(predefined, g || {}); - - declared = Object.create(null); - var exported = Object.create(null); // Variables that live outside the current file - - function each(obj, cb) { - if (!obj) - return; - - if (!Array.isArray(obj) && typeof obj === "object") - obj = Object.keys(obj); - - obj.forEach(cb); - } - - if (o) { - each(o.predef || null, function(item) { - var slice, prop; - - if (item[0] === "-") { - slice = item.slice(1); - JSHINT.blacklist[slice] = slice; - // remove from predefined if there - delete predefined[slice]; - } else { - prop = Object.getOwnPropertyDescriptor(o.predef, item); - predefined[item] = prop ? prop.value : false; - } - }); - - each(o.exported || null, function(item) { - exported[item] = true; - }); - - delete o.predef; - delete o.exported; - - optionKeys = Object.keys(o); - for (x = 0; x < optionKeys.length; x++) { - if (/^-W\d{3}$/g.test(optionKeys[x])) { - newIgnoredObj[optionKeys[x].slice(1)] = true; - } else { - var optionKey = optionKeys[x]; - newOptionObj[optionKey] = o[optionKey]; - } - } - } - - state.option = newOptionObj; - state.ignored = newIgnoredObj; - - state.option.indent = state.option.indent || 4; - state.option.maxerr = state.option.maxerr || 50; - - indent = 1; - - var scopeManagerInst = scopeManager(state, predefined, exported, declared); - scopeManagerInst.on("warning", function(ev) { - warning.apply(null, [ ev.code, ev.token].concat(ev.data)); - }); - - scopeManagerInst.on("error", function(ev) { - error.apply(null, [ ev.code, ev.token ].concat(ev.data)); - }); - - state.funct = functor("(global)", null, { - "(global)" : true, - "(scope)" : scopeManagerInst, - "(comparray)" : arrayComprehension(), - "(metrics)" : createMetrics(state.tokens.next) - }); - - functions = [state.funct]; - urls = []; - stack = null; - member = {}; - membersOnly = null; - inblock = false; - lookahead = []; - - if (!isString(s) && !Array.isArray(s)) { - errorAt("E004", 0); - return false; - } - - api = { - get isJSON() { - return state.jsonMode; - }, - - getOption: function(name) { - return state.option[name] || null; - }, - - getCache: function(name) { - return state.cache[name]; - }, - - setCache: function(name, value) { - state.cache[name] = value; - }, - - warn: function(code, data) { - warningAt.apply(null, [ code, data.line, data.char ].concat(data.data)); - }, - - on: function(names, listener) { - names.split(" ").forEach(function(name) { - emitter.on(name, listener); - }.bind(this)); - } - }; - - emitter.removeAllListeners(); - (extraModules || []).forEach(function(func) { - func(api); - }); - - state.tokens.prev = state.tokens.curr = state.tokens.next = state.syntax["(begin)"]; - - if (o && o.ignoreDelimiters) { - - if (!Array.isArray(o.ignoreDelimiters)) { - o.ignoreDelimiters = [o.ignoreDelimiters]; - } - - o.ignoreDelimiters.forEach(function(delimiterPair) { - if (!delimiterPair.start || !delimiterPair.end) - return; - - reIgnoreStr = escapeRegex(delimiterPair.start) + - "[\\s\\S]*?" + - escapeRegex(delimiterPair.end); - - reIgnore = new RegExp(reIgnoreStr, "ig"); - - s = s.replace(reIgnore, function(match) { - return match.replace(/./g, " "); - }); - }); - } - - lex = new Lexer(s); - - lex.on("warning", function(ev) { - warningAt.apply(null, [ ev.code, ev.line, ev.character].concat(ev.data)); - }); - - lex.on("error", function(ev) { - errorAt.apply(null, [ ev.code, ev.line, ev.character ].concat(ev.data)); - }); - - lex.on("fatal", function(ev) { - quit("E041", ev); - }); - - lex.on("Identifier", function(ev) { - emitter.emit("Identifier", ev); - }); - - lex.on("String", function(ev) { - emitter.emit("String", ev); - }); - - lex.on("Number", function(ev) { - emitter.emit("Number", ev); - }); - - // Check options - for (var name in o) { - if (_.has(o, name)) { - checkOption(name, state.tokens.curr); - } - } - - try { - applyOptions(); - - // combine the passed globals after we've assumed all our options - combine(predefined, g || {}); - - //reset values - parseComma.first = true; - - advance(); - switch (state.tokens.next.id) { - case "{": - case "[": - destructuringAssignOrJsonValue(); - break; - default: - directives(); - - if (state.directive["use strict"]) { - if (!state.allowsGlobalUsd()) { - warning("W097", state.tokens.prev); - } - } - - statements(); - } - - if (state.tokens.next.id !== "(end)") { - quit("E041", state.tokens.curr); - } - - state.funct["(scope)"].unstack(); - - } catch (err) { - if (err && err.name === "JSHintError") { - var nt = state.tokens.next || {}; - JSHINT.errors.push({ - scope : "(main)", - raw : err.raw, - code : err.code, - reason : err.reason, - line : err.line || nt.line, - character : err.character || nt.from - }); - } else { - throw err; - } - } - - // Loop over the listed "internals", and check them as well. - if (JSHINT.scope === "(main)") { - lintEvalCode(JSHINT.internals, o || {}, g); - } - - return JSHINT.errors.length === 0; - }; - - // Modules. - itself.addModule = function(func) { - extraModules.push(func); - }; - - itself.addModule(style.register); - - // Data summary. - itself.data = function() { - var data = { - functions: [], - options: state.option - }; - - var fu, f, i, j, n, globals; - - if (itself.errors.length) { - data.errors = itself.errors; - } - - if (state.jsonMode) { - data.json = true; - } - - var impliedGlobals = state.funct["(scope)"].getImpliedGlobals(); - if (impliedGlobals.length > 0) { - data.implieds = impliedGlobals; - } - - if (urls.length > 0) { - data.urls = urls; - } - - globals = state.funct["(scope)"].getUsedOrDefinedGlobals(); - if (globals.length > 0) { - data.globals = globals; - } - - for (i = 1; i < functions.length; i += 1) { - f = functions[i]; - fu = {}; - - for (j = 0; j < functionicity.length; j += 1) { - fu[functionicity[j]] = []; - } - - for (j = 0; j < functionicity.length; j += 1) { - if (fu[functionicity[j]].length === 0) { - delete fu[functionicity[j]]; - } - } - - fu.name = f["(name)"]; - fu.param = f["(params)"]; - fu.line = f["(line)"]; - fu.character = f["(character)"]; - fu.last = f["(last)"]; - fu.lastcharacter = f["(lastcharacter)"]; - - fu.metrics = { - complexity: f["(metrics)"].ComplexityCount, - parameters: f["(metrics)"].arity, - statements: f["(metrics)"].statementCount - }; - - data.functions.push(fu); - } - - var unuseds = state.funct["(scope)"].getUnuseds(); - if (unuseds.length > 0) { - data.unused = unuseds; - } - - for (n in member) { - if (typeof member[n] === "number") { - data.member = member; - break; - } - } - - return data; - }; - - itself.jshint = itself; - - return itself; -}()); - -// Make JSHINT a Node module, if possible. -if (typeof exports === "object" && exports) { - exports.JSHINT = JSHINT; -} - -},{"./lex.js":13,"./messages.js":14,"./options.js":16,"./reg.js":17,"./scope-manager.js":18,"./state.js":19,"./style.js":20,"./vars.js":21,"console-browserify":10,"events":5,"lodash":12}]},{},[]); - -JSHINT = require('jshint').JSHINT; -if (typeof exports === 'object' && exports) exports.JSHINT = JSHINT; -}()); \ No newline at end of file