4202 lines
130 KiB
JavaScript
4202 lines
130 KiB
JavaScript
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/*!
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* Lo-Dash v0.8.1 <http://lodash.com>
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* (c) 2012 John-David Dalton <http://allyoucanleet.com/>
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* Based on Underscore.js 1.4.1 <http://underscorejs.org>
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* (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
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* Available under MIT license <http://lodash.com/license>
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*/
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;(function(window, undefined) {
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'use strict';
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/** Detect free variable `exports` */
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var freeExports = typeof exports == 'object' && exports &&
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(typeof global == 'object' && global && global == global.global && (window = global), exports);
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/** Native prototype shortcuts */
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var ArrayProto = Array.prototype,
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BoolProto = Boolean.prototype,
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ObjectProto = Object.prototype,
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NumberProto = Number.prototype,
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StringProto = String.prototype;
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/** Used to generate unique IDs */
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var idCounter = 0;
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/** Used by `cachedContains` as the default size when optimizations are enabled for large arrays */
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var largeArraySize = 30;
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/** Used to restore the original `_` reference in `noConflict` */
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var oldDash = window._;
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/** Used to detect delimiter values that should be processed by `tokenizeEvaluate` */
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var reComplexDelimiter = /[-?+=!~*%&^<>|{(\/]|\[\D|\b(?:delete|in|instanceof|new|typeof|void)\b/;
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/** Used to match HTML entities */
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var reEscapedHtml = /&(?:amp|lt|gt|quot|#x27);/g;
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/** Used to match empty string literals in compiled template source */
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var reEmptyStringLeading = /\b__p \+= '';/g,
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reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
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reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
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/** Used to match regexp flags from their coerced string values */
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var reFlags = /\w*$/;
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/** Used to insert the data object variable into compiled template source */
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var reInsertVariable = /(?:__e|__t = )\(\s*(?![\d\s"']|this\.)/g;
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/** Used to detect if a method is native */
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var reNative = RegExp('^' +
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(ObjectProto.valueOf + '')
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.replace(/[.*+?^=!:${}()|[\]\/\\]/g, '\\$&')
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.replace(/valueOf|for [^\]]+/g, '.+?') + '$'
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);
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/** Used to ensure capturing order and avoid matches for undefined delimiters */
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var reNoMatch = /($^)/;
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/** Used to match HTML characters */
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var reUnescapedHtml = /[&<>"']/g;
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/** Used to match unescaped characters in compiled string literals */
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var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;
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/** Used to fix the JScript [[DontEnum]] bug */
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var shadowed = [
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'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
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'toLocaleString', 'toString', 'valueOf'
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];
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/** Used to make template sourceURLs easier to identify */
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var templateCounter = 0;
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/** Native method shortcuts */
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var concat = ArrayProto.concat,
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hasOwnProperty = ObjectProto.hasOwnProperty,
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push = ArrayProto.push,
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propertyIsEnumerable = ObjectProto.propertyIsEnumerable,
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slice = ArrayProto.slice,
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toString = ObjectProto.toString;
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/* Native method shortcuts for methods with the same name as other `lodash` methods */
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var nativeBind = reNative.test(nativeBind = slice.bind) && nativeBind,
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nativeFloor = Math.floor,
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nativeGetPrototypeOf = reNative.test(nativeGetPrototypeOf = Object.getPrototypeOf) && nativeGetPrototypeOf,
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nativeIsArray = reNative.test(nativeIsArray = Array.isArray) && nativeIsArray,
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nativeIsFinite = window.isFinite,
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nativeKeys = reNative.test(nativeKeys = Object.keys) && nativeKeys,
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nativeMax = Math.max,
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nativeMin = Math.min,
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nativeRandom = Math.random;
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/** `Object#toString` result shortcuts */
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var argsClass = '[object Arguments]',
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arrayClass = '[object Array]',
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boolClass = '[object Boolean]',
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dateClass = '[object Date]',
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funcClass = '[object Function]',
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numberClass = '[object Number]',
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objectClass = '[object Object]',
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regexpClass = '[object RegExp]',
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stringClass = '[object String]';
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/** Timer shortcuts */
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var clearTimeout = window.clearTimeout,
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setTimeout = window.setTimeout;
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/**
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* Detect the JScript [[DontEnum]] bug:
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*
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* In IE < 9 an objects own properties, shadowing non-enumerable ones, are
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* made non-enumerable as well.
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*/
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var hasDontEnumBug;
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/**
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* Detect if `Array#shift` and `Array#splice` augment array-like objects
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* incorrectly:
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*
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* Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()`
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* and `splice()` functions that fail to remove the last element, `value[0]`,
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* of array-like objects even though the `length` property is set to `0`.
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* The `shift()` method is buggy in IE 8 compatibility mode, while `splice()`
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* is buggy regardless of mode in IE < 9 and buggy in compatibility mode in IE 9.
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*/
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var hasObjectSpliceBug;
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/** Detect if own properties are iterated after inherited properties (IE < 9) */
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var iteratesOwnLast;
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/** Detect if an `arguments` object's indexes are non-enumerable (IE < 9) */
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var noArgsEnum = true;
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(function() {
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var object = { '0': 1, 'length': 1 },
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props = [];
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function ctor() { this.x = 1; }
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ctor.prototype = { 'valueOf': 1, 'y': 1 };
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for (var prop in new ctor) { props.push(prop); }
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for (prop in arguments) { noArgsEnum = !prop; }
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hasDontEnumBug = (props + '').length < 4;
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iteratesOwnLast = props[0] != 'x';
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hasObjectSpliceBug = (props.splice.call(object, 0, 1), object[0]);
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}(1));
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/** Detect if an `arguments` object's [[Class]] is unresolvable (Firefox < 4, IE < 9) */
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var noArgsClass = !isArguments(arguments);
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/** Detect if `Array#slice` cannot be used to convert strings to arrays (Opera < 10.52) */
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var noArraySliceOnStrings = slice.call('x')[0] != 'x';
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/**
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* Detect lack of support for accessing string characters by index:
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*
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* IE < 8 can't access characters by index and IE 8 can only access
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* characters by index on string literals.
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*/
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var noCharByIndex = ('x'[0] + Object('x')[0]) != 'xx';
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/**
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* Detect if a node's [[Class]] is unresolvable (IE < 9)
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* and that the JS engine won't error when attempting to coerce an object to
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* a string without a `toString` property value of `typeof` "function".
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*/
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try {
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var noNodeClass = ({ 'toString': 0 } + '', toString.call(window.document || 0) == objectClass);
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} catch(e) { }
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/* Detect if `Function#bind` exists and is inferred to be fast (all but V8) */
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var isBindFast = nativeBind && /\n|Opera/.test(nativeBind + toString.call(window.opera));
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/* Detect if `Object.keys` exists and is inferred to be fast (IE, Opera, V8) */
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var isKeysFast = nativeKeys && /^.+$|true/.test(nativeKeys + !!window.attachEvent);
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/* Detect if strict mode, "use strict", is inferred to be fast (V8) */
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var isStrictFast = !isBindFast;
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/**
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* Detect if sourceURL syntax is usable without erroring:
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*
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* The JS engine in Adobe products, like InDesign, will throw a syntax error
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* when it encounters a single line comment beginning with the `@` symbol.
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*
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* The JS engine in Narwhal will generate the function `function anonymous(){//}`
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* and throw a syntax error.
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*
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* Avoid comments beginning `@` symbols in IE because they are part of its
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* non-standard conditional compilation support.
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* http://msdn.microsoft.com/en-us/library/121hztk3(v=vs.94).aspx
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*/
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try {
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var useSourceURL = (Function('//@')(), !window.attachEvent);
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} catch(e) { }
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/** Used to identify object classifications that are array-like */
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var arrayLikeClasses = {};
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arrayLikeClasses[boolClass] = arrayLikeClasses[dateClass] = arrayLikeClasses[funcClass] =
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arrayLikeClasses[numberClass] = arrayLikeClasses[objectClass] = arrayLikeClasses[regexpClass] = false;
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arrayLikeClasses[argsClass] = arrayLikeClasses[arrayClass] = arrayLikeClasses[stringClass] = true;
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/** Used to identify object classifications that `_.clone` supports */
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var cloneableClasses = {};
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cloneableClasses[argsClass] = cloneableClasses[funcClass] = false;
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cloneableClasses[arrayClass] = cloneableClasses[boolClass] = cloneableClasses[dateClass] =
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cloneableClasses[numberClass] = cloneableClasses[objectClass] = cloneableClasses[regexpClass] =
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cloneableClasses[stringClass] = true;
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/** Used to determine if values are of the language type Object */
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var objectTypes = {
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'boolean': false,
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'function': true,
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'object': true,
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'number': false,
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'string': false,
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'undefined': false,
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'unknown': true
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};
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/** Used to escape characters for inclusion in compiled string literals */
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var stringEscapes = {
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'\\': '\\',
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"'": "'",
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'\n': 'n',
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'\r': 'r',
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'\t': 't',
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'\u2028': 'u2028',
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'\u2029': 'u2029'
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};
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/*--------------------------------------------------------------------------*/
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/**
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* The `lodash` function.
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*
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* @name _
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* @constructor
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* @param {Mixed} value The value to wrap in a `lodash` instance.
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* @returns {Object} Returns a `lodash` instance.
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*/
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function lodash(value) {
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// exit early if already wrapped
|
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if (value && value.__wrapped__) {
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return value;
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}
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// allow invoking `lodash` without the `new` operator
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if (!(this instanceof lodash)) {
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return new lodash(value);
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}
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this.__wrapped__ = value;
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}
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/**
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* By default, the template delimiters used by Lo-Dash are similar to those in
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* embedded Ruby (ERB). Change the following template settings to use alternative
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* delimiters.
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*
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* @static
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* @memberOf _
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* @type Object
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*/
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lodash.templateSettings = {
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/**
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* Used to detect `data` property values to be HTML-escaped.
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*
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* @static
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* @memberOf _.templateSettings
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* @type RegExp
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*/
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'escape': /<%-([\s\S]+?)%>/g,
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/**
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* Used to detect code to be evaluated.
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*
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* @static
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* @memberOf _.templateSettings
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* @type RegExp
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*/
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'evaluate': /<%([\s\S]+?)%>/g,
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/**
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* Used to detect `data` property values to inject.
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*
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* @static
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* @memberOf _.templateSettings
|
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* @type RegExp
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*/
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'interpolate': /<%=([\s\S]+?)%>/g,
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/**
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* Used to reference the data object in the template text.
|
||
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*
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||
|
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* @static
|
||
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* @memberOf _.templateSettings
|
||
|
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* @type String
|
||
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*/
|
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'variable': ''
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||
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};
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||
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|
||
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/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
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* The template used to create iterator functions.
|
||
|
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*
|
||
|
|
* @private
|
||
|
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* @param {Obect} data The data object used to populate the text.
|
||
|
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* @returns {String} Returns the interpolated text.
|
||
|
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*/
|
||
|
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var iteratorTemplate = template(
|
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// conditional strict mode
|
||
|
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'<% if (useStrict) { %>\'use strict\';\n<% } %>' +
|
||
|
|
|
||
|
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// the `iteratee` may be reassigned by the `top` snippet
|
||
|
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'var index, value, iteratee = <%= firstArg %>, ' +
|
||
|
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// assign the `result` variable an initial value
|
||
|
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'result<% if (init) { %> = <%= init %><% } %>;\n' +
|
||
|
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// exit early if the first argument is falsey
|
||
|
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'if (!<%= firstArg %>) return result;\n' +
|
||
|
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// add code before the iteration branches
|
||
|
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'<%= top %>;\n' +
|
||
|
|
|
||
|
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// the following branch is for iterating arrays and array-like objects
|
||
|
|
'<% if (arrayBranch) { %>' +
|
||
|
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'var length = iteratee.length; index = -1;' +
|
||
|
|
' <% if (objectBranch) { %>\nif (length === +length) {<% } %>' +
|
||
|
|
|
||
|
|
// add support for accessing string characters by index if needed
|
||
|
|
' <% if (noCharByIndex) { %>\n' +
|
||
|
|
' if (toString.call(iteratee) == stringClass) {\n' +
|
||
|
|
' iteratee = iteratee.split(\'\')\n' +
|
||
|
|
' }' +
|
||
|
|
' <% } %>\n' +
|
||
|
|
|
||
|
|
' <%= arrayBranch.beforeLoop %>;\n' +
|
||
|
|
' while (++index < length) {\n' +
|
||
|
|
' value = iteratee[index];\n' +
|
||
|
|
' <%= arrayBranch.inLoop %>\n' +
|
||
|
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' }' +
|
||
|
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' <% if (objectBranch) { %>\n}<% } %>' +
|
||
|
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'<% } %>' +
|
||
|
|
|
||
|
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// the following branch is for iterating an object's own/inherited properties
|
||
|
|
'<% if (objectBranch) { %>' +
|
||
|
|
' <% if (arrayBranch) { %>\nelse {' +
|
||
|
|
|
||
|
|
// add support for iterating over `arguments` objects if needed
|
||
|
|
' <% } else if (noArgsEnum) { %>\n' +
|
||
|
|
' var length = iteratee.length; index = -1;\n' +
|
||
|
|
' if (length && isArguments(iteratee)) {\n' +
|
||
|
|
' while (++index < length) {\n' +
|
||
|
|
' value = iteratee[index += \'\'];\n' +
|
||
|
|
' <%= objectBranch.inLoop %>\n' +
|
||
|
|
' }\n' +
|
||
|
|
' } else {' +
|
||
|
|
' <% } %>' +
|
||
|
|
|
||
|
|
// Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1
|
||
|
|
// (if the prototype or a property on the prototype has been set)
|
||
|
|
// incorrectly sets a function's `prototype` property [[Enumerable]]
|
||
|
|
// value to `true`. Because of this Lo-Dash standardizes on skipping
|
||
|
|
// the the `prototype` property of functions regardless of its
|
||
|
|
// [[Enumerable]] value.
|
||
|
|
' <% if (!hasDontEnumBug) { %>\n' +
|
||
|
|
' var skipProto = typeof iteratee == \'function\' && \n' +
|
||
|
|
' propertyIsEnumerable.call(iteratee, \'prototype\');\n' +
|
||
|
|
' <% } %>' +
|
||
|
|
|
||
|
|
// iterate own properties using `Object.keys` if it's fast
|
||
|
|
' <% if (isKeysFast && useHas) { %>\n' +
|
||
|
|
' var ownIndex = -1,\n' +
|
||
|
|
' ownProps = objectTypes[typeof iteratee] ? nativeKeys(iteratee) : [],\n' +
|
||
|
|
' length = ownProps.length;\n\n' +
|
||
|
|
' <%= objectBranch.beforeLoop %>;\n' +
|
||
|
|
' while (++ownIndex < length) {\n' +
|
||
|
|
' index = ownProps[ownIndex];\n' +
|
||
|
|
' <% if (!hasDontEnumBug) { %>if (!(skipProto && index == \'prototype\')) {\n <% } %>' +
|
||
|
|
' value = iteratee[index];\n' +
|
||
|
|
' <%= objectBranch.inLoop %>\n' +
|
||
|
|
' <% if (!hasDontEnumBug) { %>}\n<% } %>' +
|
||
|
|
' }' +
|
||
|
|
|
||
|
|
// else using a for-in loop
|
||
|
|
' <% } else { %>\n' +
|
||
|
|
' <%= objectBranch.beforeLoop %>;\n' +
|
||
|
|
' for (index in iteratee) {<%' +
|
||
|
|
' if (!hasDontEnumBug || useHas) { %>\n if (<%' +
|
||
|
|
' if (!hasDontEnumBug) { %>!(skipProto && index == \'prototype\')<% }' +
|
||
|
|
' if (!hasDontEnumBug && useHas) { %> && <% }' +
|
||
|
|
' if (useHas) { %>hasOwnProperty.call(iteratee, index)<% }' +
|
||
|
|
' %>) {' +
|
||
|
|
' <% } %>\n' +
|
||
|
|
' value = iteratee[index];\n' +
|
||
|
|
' <%= objectBranch.inLoop %>;' +
|
||
|
|
' <% if (!hasDontEnumBug || useHas) { %>\n }<% } %>\n' +
|
||
|
|
' }' +
|
||
|
|
' <% } %>' +
|
||
|
|
|
||
|
|
// Because IE < 9 can't set the `[[Enumerable]]` attribute of an
|
||
|
|
// existing property and the `constructor` property of a prototype
|
||
|
|
// defaults to non-enumerable, Lo-Dash skips the `constructor`
|
||
|
|
// property when it infers it's iterating over a `prototype` object.
|
||
|
|
' <% if (hasDontEnumBug) { %>\n\n' +
|
||
|
|
' var ctor = iteratee.constructor;\n' +
|
||
|
|
' <% for (var k = 0; k < 7; k++) { %>\n' +
|
||
|
|
' index = \'<%= shadowed[k] %>\';\n' +
|
||
|
|
' if (<%' +
|
||
|
|
' if (shadowed[k] == \'constructor\') {' +
|
||
|
|
' %>!(ctor && ctor.prototype === iteratee) && <%' +
|
||
|
|
' } %>hasOwnProperty.call(iteratee, index)) {\n' +
|
||
|
|
' value = iteratee[index];\n' +
|
||
|
|
' <%= objectBranch.inLoop %>\n' +
|
||
|
|
' }' +
|
||
|
|
' <% } %>' +
|
||
|
|
' <% } %>' +
|
||
|
|
' <% if (arrayBranch || noArgsEnum) { %>\n}<% } %>' +
|
||
|
|
'<% } %>\n' +
|
||
|
|
|
||
|
|
// add code to the bottom of the iteration function
|
||
|
|
'<%= bottom %>;\n' +
|
||
|
|
// finally, return the `result`
|
||
|
|
'return result'
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reusable iterator options shared by
|
||
|
|
* `countBy`, `every`, `filter`, `find`, `forEach`, `forIn`, `forOwn`, `groupBy`,
|
||
|
|
* `map`, `reject`, `some`, and `sortBy`.
|
||
|
|
*/
|
||
|
|
var baseIteratorOptions = {
|
||
|
|
'args': 'collection, callback, thisArg',
|
||
|
|
'init': 'collection',
|
||
|
|
'top': 'callback = createCallback(callback, thisArg)',
|
||
|
|
'inLoop': 'if (callback(value, index, collection) === false) return result'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `countBy`, `groupBy`, and `sortBy` */
|
||
|
|
var countByIteratorOptions = {
|
||
|
|
'init': '{}',
|
||
|
|
'top': 'callback = createCallback(callback, thisArg)',
|
||
|
|
'inLoop':
|
||
|
|
'var prop = callback(value, index, collection);\n' +
|
||
|
|
'(hasOwnProperty.call(result, prop) ? result[prop]++ : result[prop] = 1)'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `every` and `some` */
|
||
|
|
var everyIteratorOptions = {
|
||
|
|
'init': 'true',
|
||
|
|
'inLoop': 'if (!callback(value, index, collection)) return !result'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `defaults` and `extend` */
|
||
|
|
var extendIteratorOptions = {
|
||
|
|
'useHas': false,
|
||
|
|
'useStrict': false,
|
||
|
|
'args': 'object',
|
||
|
|
'init': 'object',
|
||
|
|
'top':
|
||
|
|
'for (var argsIndex = 1, argsLength = arguments.length; argsIndex < argsLength; argsIndex++) {\n' +
|
||
|
|
' if (iteratee = arguments[argsIndex]) {',
|
||
|
|
'inLoop': 'result[index] = value',
|
||
|
|
'bottom': ' }\n}'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `filter`, `reject`, and `where` */
|
||
|
|
var filterIteratorOptions = {
|
||
|
|
'init': '[]',
|
||
|
|
'inLoop': 'callback(value, index, collection) && result.push(value)'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `find`, `forEach`, `forIn`, and `forOwn` */
|
||
|
|
var forEachIteratorOptions = {
|
||
|
|
'top': 'callback = createCallback(callback, thisArg)'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `forIn` and `forOwn` */
|
||
|
|
var forOwnIteratorOptions = {
|
||
|
|
'inLoop': {
|
||
|
|
'object': baseIteratorOptions.inLoop
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `invoke`, `map`, `pluck`, and `sortBy` */
|
||
|
|
var mapIteratorOptions = {
|
||
|
|
'init': false,
|
||
|
|
'beforeLoop': {
|
||
|
|
'array': 'result = Array(length)',
|
||
|
|
'object': 'result = ' + (isKeysFast ? 'Array(length)' : '[]')
|
||
|
|
},
|
||
|
|
'inLoop': {
|
||
|
|
'array': 'result[index] = callback(value, index, collection)',
|
||
|
|
'object': 'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '(callback(value, index, collection))'
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `omit` and `pick` */
|
||
|
|
var omitIteratorOptions = {
|
||
|
|
'useHas': false,
|
||
|
|
'args': 'object, callback, thisArg',
|
||
|
|
'init': '{}',
|
||
|
|
'top':
|
||
|
|
'var isFunc = typeof callback == \'function\';\n' +
|
||
|
|
'if (isFunc) callback = createCallback(callback, thisArg);\n' +
|
||
|
|
'else var props = concat.apply(ArrayProto, arguments)',
|
||
|
|
'inLoop':
|
||
|
|
'if (isFunc\n' +
|
||
|
|
' ? !callback(value, index, object)\n' +
|
||
|
|
' : indexOf(props, index) < 0\n' +
|
||
|
|
') result[index] = value'
|
||
|
|
};
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function optimized for searching large arrays for a given `value`,
|
||
|
|
* starting at `fromIndex`, using strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Array} array The array to search.
|
||
|
|
* @param {Mixed} value The value to search for.
|
||
|
|
* @param {Number} [fromIndex=0] The index to start searching from.
|
||
|
|
* @param {Number} [largeSize=30] The length at which an array is considered large.
|
||
|
|
* @returns {Boolean} Returns `true` if `value` is found, else `false`.
|
||
|
|
*/
|
||
|
|
function cachedContains(array, fromIndex, largeSize) {
|
||
|
|
fromIndex || (fromIndex = 0);
|
||
|
|
|
||
|
|
var length = array.length,
|
||
|
|
isLarge = (length - fromIndex) >= (largeSize || largeArraySize),
|
||
|
|
cache = isLarge ? {} : array;
|
||
|
|
|
||
|
|
if (isLarge) {
|
||
|
|
// init value cache
|
||
|
|
var key,
|
||
|
|
index = fromIndex - 1;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
// manually coerce `value` to string because `hasOwnProperty`, in some
|
||
|
|
// older versions of Firefox, coerces objects incorrectly
|
||
|
|
key = array[index] + '';
|
||
|
|
(hasOwnProperty.call(cache, key) ? cache[key] : (cache[key] = [])).push(array[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return function(value) {
|
||
|
|
if (isLarge) {
|
||
|
|
var key = value + '';
|
||
|
|
return hasOwnProperty.call(cache, key) && indexOf(cache[key], value) > -1;
|
||
|
|
}
|
||
|
|
return indexOf(cache, value, fromIndex) > -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `sortBy` to compare transformed `collection` values, stable sorting
|
||
|
|
* them in ascending order.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Object} a The object to compare to `b`.
|
||
|
|
* @param {Object} b The object to compare to `a`.
|
||
|
|
* @returns {Number} Returns the sort order indicator of `1` or `-1`.
|
||
|
|
*/
|
||
|
|
function compareAscending(a, b) {
|
||
|
|
var ai = a.index,
|
||
|
|
bi = b.index;
|
||
|
|
|
||
|
|
a = a.criteria;
|
||
|
|
b = b.criteria;
|
||
|
|
|
||
|
|
// ensure a stable sort in V8 and other engines
|
||
|
|
// http://code.google.com/p/v8/issues/detail?id=90
|
||
|
|
if (a !== b) {
|
||
|
|
if (a > b || a === undefined) {
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
if (a < b || b === undefined) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ai < bi ? -1 : 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes `func` with the `this`
|
||
|
|
* binding of `thisArg` and prepends any `partailArgs` to the arguments passed
|
||
|
|
* to the bound function.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Function|String} func The function to bind or the method name.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `func`.
|
||
|
|
* @param {Array} partialArgs An array of arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new bound function.
|
||
|
|
*/
|
||
|
|
function createBound(func, thisArg, partialArgs) {
|
||
|
|
var isFunc = isFunction(func),
|
||
|
|
isPartial = !partialArgs,
|
||
|
|
methodName = func;
|
||
|
|
|
||
|
|
// juggle arguments
|
||
|
|
if (isPartial) {
|
||
|
|
partialArgs = thisArg;
|
||
|
|
}
|
||
|
|
|
||
|
|
function bound() {
|
||
|
|
// `Function#bind` spec
|
||
|
|
// http://es5.github.com/#x15.3.4.5
|
||
|
|
var args = arguments,
|
||
|
|
thisBinding = isPartial ? this : thisArg;
|
||
|
|
|
||
|
|
if (!isFunc) {
|
||
|
|
func = thisArg[methodName];
|
||
|
|
}
|
||
|
|
if (partialArgs.length) {
|
||
|
|
args = args.length
|
||
|
|
? partialArgs.concat(slice.call(args))
|
||
|
|
: partialArgs;
|
||
|
|
}
|
||
|
|
if (this instanceof bound) {
|
||
|
|
// get `func` instance if `bound` is invoked in a `new` expression
|
||
|
|
noop.prototype = func.prototype;
|
||
|
|
thisBinding = new noop;
|
||
|
|
|
||
|
|
// mimic the constructor's `return` behavior
|
||
|
|
// http://es5.github.com/#x13.2.2
|
||
|
|
var result = func.apply(thisBinding, args);
|
||
|
|
return result && objectTypes[typeof result]
|
||
|
|
? result
|
||
|
|
: thisBinding
|
||
|
|
}
|
||
|
|
return func.apply(thisBinding, args);
|
||
|
|
}
|
||
|
|
return bound;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Produces an iteration callback bound to an optional `thisArg`. If `func` is
|
||
|
|
* a property name, the callback will return the property value for a given element.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Function|String} [func=identity|property] The function called per
|
||
|
|
* iteration or property name to query.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Function} Returns a callback function.
|
||
|
|
*/
|
||
|
|
function createCallback(func, thisArg) {
|
||
|
|
if (!func) {
|
||
|
|
return identity;
|
||
|
|
}
|
||
|
|
if (typeof func != 'function') {
|
||
|
|
return function(object) {
|
||
|
|
return object[func];
|
||
|
|
};
|
||
|
|
}
|
||
|
|
if (thisArg !== undefined) {
|
||
|
|
return function(value, index, object) {
|
||
|
|
return func.call(thisArg, value, index, object);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
return func;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates compiled iteration functions. The iteration function will be created
|
||
|
|
* to iterate over only objects if the first argument of `options.args` is
|
||
|
|
* "object" or `options.inLoop.array` is falsey.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Object} [options1, options2, ...] The compile options objects.
|
||
|
|
*
|
||
|
|
* useHas - A boolean to specify whether or not to use `hasOwnProperty` checks
|
||
|
|
* in the object loop.
|
||
|
|
*
|
||
|
|
* useStrict - A boolean to specify whether or not to include the ES5
|
||
|
|
* "use strict" directive.
|
||
|
|
*
|
||
|
|
* args - A string of comma separated arguments the iteration function will accept.
|
||
|
|
*
|
||
|
|
* init - A string to specify the initial value of the `result` variable.
|
||
|
|
*
|
||
|
|
* top - A string of code to execute before the iteration branches.
|
||
|
|
*
|
||
|
|
* beforeLoop - A string or object containing an "array" or "object" property
|
||
|
|
* of code to execute before the array or object loops.
|
||
|
|
*
|
||
|
|
* inLoop - A string or object containing an "array" or "object" property
|
||
|
|
* of code to execute in the array or object loops.
|
||
|
|
*
|
||
|
|
* bottom - A string of code to execute after the iteration branches but
|
||
|
|
* before the `result` is returned.
|
||
|
|
*
|
||
|
|
* @returns {Function} Returns the compiled function.
|
||
|
|
*/
|
||
|
|
function createIterator() {
|
||
|
|
var index = -1,
|
||
|
|
length = arguments.length;
|
||
|
|
|
||
|
|
// merge options into a template data object
|
||
|
|
var data = {
|
||
|
|
'bottom': '',
|
||
|
|
'hasDontEnumBug': hasDontEnumBug,
|
||
|
|
'isKeysFast': isKeysFast,
|
||
|
|
'noArgsEnum': noArgsEnum,
|
||
|
|
'noCharByIndex': noCharByIndex,
|
||
|
|
'shadowed': shadowed,
|
||
|
|
'top': '',
|
||
|
|
'useHas': true,
|
||
|
|
'useStrict': isStrictFast,
|
||
|
|
'arrayBranch': {},
|
||
|
|
'objectBranch': {}
|
||
|
|
};
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var object = arguments[index];
|
||
|
|
for (var prop in object) {
|
||
|
|
var value = object[prop];
|
||
|
|
// keep this regexp explicit for the build pre-process
|
||
|
|
if (/beforeLoop|inLoop/.test(prop)) {
|
||
|
|
if (typeof value == 'string') {
|
||
|
|
value = { 'array': value, 'object': value };
|
||
|
|
}
|
||
|
|
data.arrayBranch[prop] = value.array;
|
||
|
|
data.objectBranch[prop] = value.object;
|
||
|
|
} else {
|
||
|
|
data[prop] = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// set additional template `data` values
|
||
|
|
var args = data.args,
|
||
|
|
firstArg = /^[^,]+/.exec(args)[0],
|
||
|
|
init = data.init;
|
||
|
|
|
||
|
|
data.firstArg = firstArg;
|
||
|
|
data.init = init == null ? firstArg : init;
|
||
|
|
|
||
|
|
if (firstArg != 'collection' || !data.arrayBranch.inLoop) {
|
||
|
|
data.arrayBranch = null;
|
||
|
|
}
|
||
|
|
// create the function factory
|
||
|
|
var factory = Function(
|
||
|
|
'arrayLikeClasses, ArrayProto, bind, compareAscending, concat, createCallback, ' +
|
||
|
|
'forIn, hasOwnProperty, indexOf, isArguments, isArray, isFunction, ' +
|
||
|
|
'isPlainObject, objectClass, objectTypes, nativeKeys, propertyIsEnumerable, ' +
|
||
|
|
'slice, stringClass, toString, undefined',
|
||
|
|
'var callee = function(' + args + ') {\n' + iteratorTemplate(data) + '\n};\n' +
|
||
|
|
'return callee'
|
||
|
|
);
|
||
|
|
// return the compiled function
|
||
|
|
return factory(
|
||
|
|
arrayLikeClasses, ArrayProto, bind, compareAscending, concat, createCallback,
|
||
|
|
forIn, hasOwnProperty, indexOf, isArguments, isArray, isFunction,
|
||
|
|
isPlainObject, objectClass, objectTypes, nativeKeys, propertyIsEnumerable,
|
||
|
|
slice, stringClass, toString
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `template` to escape characters for inclusion in compiled
|
||
|
|
* string literals.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} match The matched character to escape.
|
||
|
|
* @returns {String} Returns the escaped character.
|
||
|
|
*/
|
||
|
|
function escapeStringChar(match) {
|
||
|
|
return '\\' + stringEscapes[match];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `escape` to convert characters to HTML entities.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} match The matched character to escape.
|
||
|
|
* @returns {String} Returns the escaped character.
|
||
|
|
*/
|
||
|
|
function escapeHtmlChar(match) {
|
||
|
|
return htmlEscapes[match];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A no-operation function.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function noop() {
|
||
|
|
// no operation performed
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `unescape` to convert HTML entities to characters.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} match The matched character to unescape.
|
||
|
|
* @returns {String} Returns the unescaped character.
|
||
|
|
*/
|
||
|
|
function unescapeHtmlChar(match) {
|
||
|
|
return htmlUnescapes[match];
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed of the inverted keys and values of the given `object`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to invert.
|
||
|
|
* @returns {Object} Returns the created inverted object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.invert({ 'first': 'Moe', 'second': 'Larry', 'third': 'Curly' });
|
||
|
|
* // => { 'Moe': 'first', 'Larry': 'second', 'Curly': 'third' } (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var invert = createIterator({
|
||
|
|
'args': 'object',
|
||
|
|
'init': '{}',
|
||
|
|
'inLoop': 'result[value] = index'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is an `arguments` object.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is an `arguments` object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* (function() { return _.isArguments(arguments); })(1, 2, 3);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isArguments([1, 2, 3]);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isArguments(value) {
|
||
|
|
return toString.call(value) == argsClass;
|
||
|
|
}
|
||
|
|
// fallback for browsers that can't detect `arguments` objects by [[Class]]
|
||
|
|
if (noArgsClass) {
|
||
|
|
isArguments = function(value) {
|
||
|
|
return value ? hasOwnProperty.call(value, 'callee') : false;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is an array.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is an array, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* (function() { return _.isArray(arguments); })();
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isArray([1, 2, 3]);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var isArray = nativeIsArray || function(value) {
|
||
|
|
return toString.call(value) == arrayClass;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a function, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isFunction(_);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isFunction(value) {
|
||
|
|
return typeof value == 'function';
|
||
|
|
}
|
||
|
|
// fallback for older versions of Chrome and Safari
|
||
|
|
if (isFunction(/x/)) {
|
||
|
|
isFunction = function(value) {
|
||
|
|
return toString.call(value) == funcClass;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if a given `value` is an object created by the `Object` constructor.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if `value` is a plain object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* function Stooge(name, age) {
|
||
|
|
* this.name = name;
|
||
|
|
* this.age = age;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* _.isPlainObject(new Stooge('moe', 40));
|
||
|
|
* // false
|
||
|
|
*
|
||
|
|
* _.isPlainObject([1, 2, 3]);
|
||
|
|
* // false
|
||
|
|
*
|
||
|
|
* _.isPlainObject({ 'name': 'moe', 'age': 40 });
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var isPlainObject = !nativeGetPrototypeOf ? isPlainFallback : function(value) {
|
||
|
|
if (!(value && typeof value == 'object')) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
var valueOf = value.valueOf,
|
||
|
|
objProto = typeof valueOf == 'function' && (objProto = nativeGetPrototypeOf(valueOf)) && nativeGetPrototypeOf(objProto);
|
||
|
|
|
||
|
|
return objProto
|
||
|
|
? value == objProto || (nativeGetPrototypeOf(value) == objProto && !isArguments(value))
|
||
|
|
: isPlainFallback(value);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A fallback implementation of `isPlainObject` that checks if a given `value`
|
||
|
|
* is an object created by the `Object` constructor, assuming objects created
|
||
|
|
* by the `Object` constructor have no inherited enumerable properties and that
|
||
|
|
* there are no `Object.prototype` extensions.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if `value` is a plain object, else `false`.
|
||
|
|
*/
|
||
|
|
function isPlainFallback(value) {
|
||
|
|
// avoid non-objects and false positives for `arguments` objects
|
||
|
|
var result = false;
|
||
|
|
if (!(value && typeof value == 'object') || isArguments(value)) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
// IE < 9 presents DOM nodes as `Object` objects except they have `toString`
|
||
|
|
// methods that are `typeof` "string" and still can coerce nodes to strings.
|
||
|
|
// Also check that the constructor is `Object` (i.e. `Object instanceof Object`)
|
||
|
|
var ctor = value.constructor;
|
||
|
|
if ((!noNodeClass || !(typeof value.toString != 'function' && typeof (value + '') == 'string')) &&
|
||
|
|
(!isFunction(ctor) || ctor instanceof ctor)) {
|
||
|
|
// 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.
|
||
|
|
if (iteratesOwnLast) {
|
||
|
|
forIn(value, function(value, key, object) {
|
||
|
|
result = !hasOwnProperty.call(object, key);
|
||
|
|
return false;
|
||
|
|
});
|
||
|
|
return result === false;
|
||
|
|
}
|
||
|
|
// 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.
|
||
|
|
forIn(value, function(value, key) {
|
||
|
|
result = key;
|
||
|
|
});
|
||
|
|
return result === false || hasOwnProperty.call(value, result);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A shim implementation of `Object.keys` that produces an array of the given
|
||
|
|
* object's own enumerable property names.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property names.
|
||
|
|
*/
|
||
|
|
var shimKeys = createIterator({
|
||
|
|
'args': 'object',
|
||
|
|
'init': '[]',
|
||
|
|
'inLoop': 'result.push(index)'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used to convert characters to HTML entities:
|
||
|
|
*
|
||
|
|
* 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 an unquoted attribute value.
|
||
|
|
* http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact")
|
||
|
|
*/
|
||
|
|
var htmlEscapes = {
|
||
|
|
'&': '&',
|
||
|
|
'<': '<',
|
||
|
|
'>': '>',
|
||
|
|
'"': '"',
|
||
|
|
"'": '''
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Used to convert HTML entities to characters */
|
||
|
|
var htmlUnescapes = invert(htmlEscapes);
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a clone of `value`. If `deep` is `true`, all nested objects will
|
||
|
|
* also be cloned otherwise they will be assigned by reference. Functions, DOM
|
||
|
|
* nodes, `arguments` objects, and objects created by constructors other than
|
||
|
|
* `Object` are **not** cloned.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to clone.
|
||
|
|
* @param {Boolean} deep A flag to indicate a deep clone.
|
||
|
|
* @param- {Object} [guard] Internally used to allow this method to work with
|
||
|
|
* others like `_.map` without using their callback `index` argument for `deep`.
|
||
|
|
* @param- {Array} [stackA=[]] Internally used to track traversed source objects.
|
||
|
|
* @param- {Array} [stackB=[]] Internally used to associate clones with their
|
||
|
|
* source counterparts.
|
||
|
|
* @returns {Mixed} Returns the cloned `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 },
|
||
|
|
* { 'name': 'curly', 'age': 60 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.clone({ 'name': 'moe' });
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*
|
||
|
|
* var shallow = _.clone(stooges);
|
||
|
|
* shallow[0] === stooges[0];
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* var deep = _.clone(stooges, true);
|
||
|
|
* shallow[0] === stooges[0];
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function clone(value, deep, guard, stackA, stackB) {
|
||
|
|
if (value == null) {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
if (guard) {
|
||
|
|
deep = false;
|
||
|
|
}
|
||
|
|
// inspect [[Class]]
|
||
|
|
var isObj = objectTypes[typeof value];
|
||
|
|
if (isObj) {
|
||
|
|
// don't clone `arguments` objects, functions, or non-object Objects
|
||
|
|
var className = toString.call(value);
|
||
|
|
if (!cloneableClasses[className] || (noArgsClass && isArguments(value))) {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
var isArr = className == arrayClass;
|
||
|
|
isObj = isArr || (className == objectClass ? isPlainObject(value) : isObj);
|
||
|
|
}
|
||
|
|
// shallow clone
|
||
|
|
if (!isObj || !deep) {
|
||
|
|
// don't clone functions
|
||
|
|
return isObj
|
||
|
|
? (isArr ? slice.call(value) : extend({}, value))
|
||
|
|
: value;
|
||
|
|
}
|
||
|
|
|
||
|
|
var ctor = value.constructor;
|
||
|
|
switch (className) {
|
||
|
|
case boolClass:
|
||
|
|
return new ctor(value == true);
|
||
|
|
|
||
|
|
case dateClass:
|
||
|
|
return new ctor(+value);
|
||
|
|
|
||
|
|
case numberClass:
|
||
|
|
case stringClass:
|
||
|
|
return new ctor(value);
|
||
|
|
|
||
|
|
case regexpClass:
|
||
|
|
return ctor(value.source, reFlags.exec(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];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// init cloned object
|
||
|
|
var result = isArr ? ctor(length = value.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)
|
||
|
|
if (isArr) {
|
||
|
|
var index = -1;
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = clone(value[index], deep, null, stackA, stackB);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
forOwn(value, function(objValue, key) {
|
||
|
|
result[key] = clone(objValue, deep, null, stackA, stackB);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Assigns enumerable properties of the default object(s) to the `destination`
|
||
|
|
* object for all `destination` properties that resolve to `null`/`undefined`.
|
||
|
|
* Once a property is set, additional defaults of the same property will be
|
||
|
|
* ignored.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The destination object.
|
||
|
|
* @param {Object} [default1, default2, ...] The default objects.
|
||
|
|
* @returns {Object} Returns the destination object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var iceCream = { 'flavor': 'chocolate' };
|
||
|
|
* _.defaults(iceCream, { 'flavor': 'vanilla', 'sprinkles': 'rainbow' });
|
||
|
|
* // => { 'flavor': 'chocolate', 'sprinkles': 'rainbow' }
|
||
|
|
*/
|
||
|
|
var defaults = createIterator(extendIteratorOptions, {
|
||
|
|
'inLoop': 'if (result[index] == null) ' + extendIteratorOptions.inLoop
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Assigns enumerable properties of the source object(s) to the `destination`
|
||
|
|
* object. Subsequent sources will overwrite propery assignments of previous
|
||
|
|
* sources.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The destination object.
|
||
|
|
* @param {Object} [source1, source2, ...] The source objects.
|
||
|
|
* @returns {Object} Returns the destination object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.extend({ 'name': 'moe' }, { 'age': 40 });
|
||
|
|
* // => { 'name': 'moe', 'age': 40 }
|
||
|
|
*/
|
||
|
|
var extend = createIterator(extendIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterates over `object`'s own and inherited enumerable properties, executing
|
||
|
|
* the `callback` for each property. The `callback` is bound to `thisArg` and
|
||
|
|
* invoked with three arguments; (value, key, object). Callbacks may exit iteration
|
||
|
|
* early by explicitly returning `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to iterate over.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns `object`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* function Dog(name) {
|
||
|
|
* this.name = name;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* Dog.prototype.bark = function() {
|
||
|
|
* alert('Woof, woof!');
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.forIn(new Dog('Dagny'), function(value, key) {
|
||
|
|
* alert(key);
|
||
|
|
* });
|
||
|
|
* // => alerts 'name' and 'bark' (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var forIn = createIterator(baseIteratorOptions, forEachIteratorOptions, forOwnIteratorOptions, {
|
||
|
|
'useHas': false
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterates over `object`'s own enumerable properties, executing the `callback`
|
||
|
|
* for each property. The `callback` is bound to `thisArg` and invoked with three
|
||
|
|
* arguments; (value, key, object). Callbacks may exit iteration early by explicitly
|
||
|
|
* returning `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to iterate over.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns `object`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
|
||
|
|
* alert(key);
|
||
|
|
* });
|
||
|
|
* // => alerts '0', '1', and 'length' (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var forOwn = createIterator(baseIteratorOptions, forEachIteratorOptions, forOwnIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a sorted array of all enumerable properties, own and inherited,
|
||
|
|
* of `object` that have function values.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias methods
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property names that have function values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.functions(_);
|
||
|
|
* // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
|
||
|
|
*/
|
||
|
|
var functions = createIterator({
|
||
|
|
'useHas': false,
|
||
|
|
'args': 'object',
|
||
|
|
'init': '[]',
|
||
|
|
'inLoop': 'if (isFunction(value)) result.push(index)',
|
||
|
|
'bottom': 'result.sort()'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the specified object `property` exists and is a direct property,
|
||
|
|
* instead of an inherited property.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to check.
|
||
|
|
* @param {String} property The property to check for.
|
||
|
|
* @returns {Boolean} Returns `true` if key is a direct property, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function has(object, property) {
|
||
|
|
return object ? hasOwnProperty.call(object, property) : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a boolean (`true` or `false`) value.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a boolean value, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isBoolean(null);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isBoolean(value) {
|
||
|
|
return value === true || value === false || toString.call(value) == boolClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a date.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a date, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isDate(new Date);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isDate(value) {
|
||
|
|
return toString.call(value) == dateClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a DOM element.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a DOM element, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isElement(document.body);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isElement(value) {
|
||
|
|
return value ? value.nodeType === 1 : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is empty. Arrays, strings, or `arguments` objects with a
|
||
|
|
* length of `0` and objects with no own enumerable properties are considered
|
||
|
|
* "empty".
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Array|Object|String} value The value to inspect.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is empty, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isEmpty([1, 2, 3]);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isEmpty({});
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isEmpty('');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var isEmpty = createIterator({
|
||
|
|
'args': 'value',
|
||
|
|
'init': 'true',
|
||
|
|
'top':
|
||
|
|
'var className = toString.call(value),\n' +
|
||
|
|
' length = value.length;\n' +
|
||
|
|
'if (arrayLikeClasses[className]' +
|
||
|
|
(noArgsClass ? ' || isArguments(value)' : '') + ' ||\n' +
|
||
|
|
' (className == objectClass && length === +length &&\n' +
|
||
|
|
' isFunction(value.splice))' +
|
||
|
|
') return !length',
|
||
|
|
'inLoop': {
|
||
|
|
'object': 'return false'
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Performs a deep comparison between two values to determine if they are
|
||
|
|
* equivalent to each other.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} a The value to compare.
|
||
|
|
* @param {Mixed} b The other value to compare.
|
||
|
|
* @param- {Object} [stackA=[]] Internally used track traversed `a` objects.
|
||
|
|
* @param- {Object} [stackB=[]] Internally used track traversed `b` objects.
|
||
|
|
* @returns {Boolean} Returns `true` if the values are equvalent, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var moe = { 'name': 'moe', 'luckyNumbers': [13, 27, 34] };
|
||
|
|
* var clone = { 'name': 'moe', 'luckyNumbers': [13, 27, 34] };
|
||
|
|
*
|
||
|
|
* moe == clone;
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isEqual(moe, clone);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isEqual(a, b, stackA, stackB) {
|
||
|
|
// a strict comparison is necessary because `null == undefined`
|
||
|
|
if (a == null || b == null) {
|
||
|
|
return a === b;
|
||
|
|
}
|
||
|
|
// exit early for identical values
|
||
|
|
if (a === b) {
|
||
|
|
// treat `+0` vs. `-0` as not equal
|
||
|
|
return a !== 0 || (1 / a == 1 / b);
|
||
|
|
}
|
||
|
|
// unwrap any `lodash` wrapped values
|
||
|
|
if (objectTypes[typeof a] || objectTypes[typeof b]) {
|
||
|
|
a = a.__wrapped__ || a;
|
||
|
|
b = b.__wrapped__ || b;
|
||
|
|
}
|
||
|
|
// compare [[Class]] names
|
||
|
|
var className = toString.call(a);
|
||
|
|
if (className != toString.call(b)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
switch (className) {
|
||
|
|
case boolClass:
|
||
|
|
case dateClass:
|
||
|
|
// 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 +a == +b;
|
||
|
|
|
||
|
|
case numberClass:
|
||
|
|
// treat `NaN` vs. `NaN` as equal
|
||
|
|
return a != +a
|
||
|
|
? b != +b
|
||
|
|
// but treat `+0` vs. `-0` as not equal
|
||
|
|
: (a == 0 ? (1 / a == 1 / b) : a == +b);
|
||
|
|
|
||
|
|
case regexpClass:
|
||
|
|
case stringClass:
|
||
|
|
// coerce regexes to strings (http://es5.github.com/#x15.10.6.4)
|
||
|
|
// treat string primitives and their corresponding object instances as equal
|
||
|
|
return a == b + '';
|
||
|
|
}
|
||
|
|
// exit early, in older browsers, if `a` is array-like but not `b`
|
||
|
|
var isArr = arrayLikeClasses[className];
|
||
|
|
if (noArgsClass && !isArr && (isArr = isArguments(a)) && !isArguments(b)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// exit for functions and DOM nodes
|
||
|
|
if (!isArr && (className != objectClass || (noNodeClass && (
|
||
|
|
(typeof a.toString != 'function' && typeof (a + '') == 'string') ||
|
||
|
|
(typeof b.toString != 'function' && typeof (b + '') == 'string'))))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// assume cyclic structures are equal
|
||
|
|
// the algorithm for detecting cyclic structures is adapted from ES 5.1
|
||
|
|
// section 15.12.3, abstract operation `JO` (http://es5.github.com/#x15.12.3)
|
||
|
|
stackA || (stackA = []);
|
||
|
|
stackB || (stackB = []);
|
||
|
|
|
||
|
|
var length = stackA.length;
|
||
|
|
while (length--) {
|
||
|
|
if (stackA[length] == a) {
|
||
|
|
return stackB[length] == b;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var index = -1,
|
||
|
|
result = true,
|
||
|
|
size = 0;
|
||
|
|
|
||
|
|
// add `a` and `b` to the stack of traversed objects
|
||
|
|
stackA.push(a);
|
||
|
|
stackB.push(b);
|
||
|
|
|
||
|
|
// recursively compare objects and arrays (susceptible to call stack limits)
|
||
|
|
if (isArr) {
|
||
|
|
// compare lengths to determine if a deep comparison is necessary
|
||
|
|
size = a.length;
|
||
|
|
result = size == b.length;
|
||
|
|
|
||
|
|
if (result) {
|
||
|
|
// deep compare the contents, ignoring non-numeric properties
|
||
|
|
while (size--) {
|
||
|
|
if (!(result = isEqual(a[size], b[size], stackA, stackB))) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
var ctorA = a.constructor,
|
||
|
|
ctorB = b.constructor;
|
||
|
|
|
||
|
|
// non `Object` object instances with different constructors are not equal
|
||
|
|
if (ctorA != ctorB && !(
|
||
|
|
isFunction(ctorA) && ctorA instanceof ctorA &&
|
||
|
|
isFunction(ctorB) && ctorB instanceof ctorB
|
||
|
|
)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// deep compare objects
|
||
|
|
for (var prop in a) {
|
||
|
|
if (hasOwnProperty.call(a, prop)) {
|
||
|
|
// count the number of properties.
|
||
|
|
size++;
|
||
|
|
// deep compare each property value.
|
||
|
|
if (!(hasOwnProperty.call(b, prop) && isEqual(a[prop], b[prop], stackA, stackB))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// ensure both objects have the same number of properties
|
||
|
|
for (prop in b) {
|
||
|
|
// The JS engine in Adobe products, like InDesign, has a bug that causes
|
||
|
|
// `!size--` to throw an error so it must be wrapped in parentheses.
|
||
|
|
// https://github.com/documentcloud/underscore/issues/355
|
||
|
|
if (hasOwnProperty.call(b, prop) && !(size--)) {
|
||
|
|
// `size` will be `-1` if `b` has more properties than `a`
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// handle JScript [[DontEnum]] bug
|
||
|
|
if (hasDontEnumBug) {
|
||
|
|
while (++index < 7) {
|
||
|
|
prop = shadowed[index];
|
||
|
|
if (hasOwnProperty.call(a, prop) &&
|
||
|
|
!(hasOwnProperty.call(b, prop) && isEqual(a[prop], b[prop], stackA, stackB))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a finite number.
|
||
|
|
*
|
||
|
|
* Note: This is not the same as native `isFinite`, which will return true for
|
||
|
|
* booleans and other values. See http://es5.github.com/#x15.1.2.5.
|
||
|
|
*
|
||
|
|
* @deprecated
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a finite number, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isFinite(-101);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isFinite('10');
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isFinite(Infinity);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isFinite(value) {
|
||
|
|
return nativeIsFinite(value) && toString.call(value) == numberClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is the language type of Object.
|
||
|
|
* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is an object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isObject({});
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isObject([1, 2, 3]);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isObject(1);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isObject(value) {
|
||
|
|
// check if the value is the ECMAScript language type of Object
|
||
|
|
// http://es5.github.com/#x8
|
||
|
|
// and avoid a V8 bug
|
||
|
|
// http://code.google.com/p/v8/issues/detail?id=2291
|
||
|
|
return value ? objectTypes[typeof value] : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is `NaN`.
|
||
|
|
*
|
||
|
|
* Note: This is not the same as native `isNaN`, which will return true for
|
||
|
|
* `undefined` and other values. See http://es5.github.com/#x15.1.2.4.
|
||
|
|
*
|
||
|
|
* @deprecated
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is `NaN`, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isNaN(NaN);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isNaN(new Number(NaN));
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* isNaN(undefined);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isNaN(undefined);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isNaN(value) {
|
||
|
|
// `NaN` as a primitive is the only value that is not equal to itself
|
||
|
|
// (perform the [[Class]] check first to avoid errors with some host objects in IE)
|
||
|
|
return toString.call(value) == numberClass && value != +value
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is `null`.
|
||
|
|
*
|
||
|
|
* @deprecated
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is `null`, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isNull(null);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isNull(undefined);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isNull(value) {
|
||
|
|
return value === null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a number.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a number, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isNumber(8.4 * 5);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isNumber(value) {
|
||
|
|
return toString.call(value) == numberClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a regular expression.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a regular expression, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isRegExp(/moe/);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isRegExp(value) {
|
||
|
|
return toString.call(value) == regexpClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a string.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a string, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isString('moe');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isString(value) {
|
||
|
|
return toString.call(value) == stringClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is `undefined`.
|
||
|
|
*
|
||
|
|
* @deprecated
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is `undefined`, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isUndefined(void 0);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isUndefined(value) {
|
||
|
|
return value === undefined;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array composed of the own enumerable property names of `object`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property names.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.keys({ 'one': 1, 'two': 2, 'three': 3 });
|
||
|
|
* // => ['one', 'two', 'three'] (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var keys = !nativeKeys ? shimKeys : function(object) {
|
||
|
|
var type = typeof object;
|
||
|
|
|
||
|
|
// avoid iterating over the `prototype` property
|
||
|
|
if (type == 'function' && propertyIsEnumerable.call(object, 'prototype')) {
|
||
|
|
return shimKeys(object);
|
||
|
|
}
|
||
|
|
return object && objectTypes[type]
|
||
|
|
? nativeKeys(object)
|
||
|
|
: [];
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Merges enumerable properties of the source object(s) into the `destination`
|
||
|
|
* object. Subsequent sources will overwrite propery assignments of previous
|
||
|
|
* sources.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The destination object.
|
||
|
|
* @param {Object} [source1, source2, ...] The source objects.
|
||
|
|
* @param- {Object} [indicator] Internally used to indicate that the `stack`
|
||
|
|
* argument is an array of traversed objects instead of another source object.
|
||
|
|
* @param- {Array} [stackA=[]] Internally used to track traversed source objects.
|
||
|
|
* @param- {Array} [stackB=[]] Internally used to associate clones with their
|
||
|
|
* source counterparts.
|
||
|
|
* @returns {Object} Returns the destination object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe' },
|
||
|
|
* { 'name': 'larry' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* var ages = [
|
||
|
|
* { 'age': 40 },
|
||
|
|
* { 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.merge(stooges, ages);
|
||
|
|
* // => [{ 'name': 'moe', 'age': 40 }, { 'name': 'larry', 'age': 50 }]
|
||
|
|
*/
|
||
|
|
var merge = createIterator(extendIteratorOptions, {
|
||
|
|
'args': 'object, source, indicator',
|
||
|
|
'top':
|
||
|
|
'var isArr, args = arguments, argsIndex = 0;\n' +
|
||
|
|
'if (indicator == compareAscending) {\n' +
|
||
|
|
' var argsLength = 2, stackA = args[3], stackB = args[4]\n' +
|
||
|
|
'} else {\n' +
|
||
|
|
' var argsLength = args.length, stackA = [], stackB = []\n' +
|
||
|
|
'}\n' +
|
||
|
|
'while (++argsIndex < argsLength) {\n' +
|
||
|
|
' if (iteratee = args[argsIndex]) {',
|
||
|
|
'inLoop':
|
||
|
|
'if ((source = value) && ((isArr = isArray(source)) || isPlainObject(source))) {\n' +
|
||
|
|
' var found = false, stackLength = stackA.length;\n' +
|
||
|
|
' while (stackLength--) {\n' +
|
||
|
|
' if (found = stackA[stackLength] == source) break\n' +
|
||
|
|
' }\n' +
|
||
|
|
' if (found) {\n' +
|
||
|
|
' result[index] = stackB[stackLength]\n' +
|
||
|
|
' } else {\n' +
|
||
|
|
' stackA.push(source);\n' +
|
||
|
|
' stackB.push(value = (value = result[index]) && isArr\n' +
|
||
|
|
' ? (isArray(value) ? value : [])\n' +
|
||
|
|
' : (isPlainObject(value) ? value : {})\n' +
|
||
|
|
' );\n' +
|
||
|
|
' result[index] = callee(value, source, compareAscending, stackA, stackB)\n' +
|
||
|
|
' }\n' +
|
||
|
|
'} else if (source != null) {\n' +
|
||
|
|
' result[index] = source\n' +
|
||
|
|
'}'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a shallow clone of `object` excluding the specified properties.
|
||
|
|
* Property names may be specified as individual arguments or as arrays of
|
||
|
|
* property names. If `callback` is passed, it will be executed for each property
|
||
|
|
* in the `object`, omitting the properties `callback` returns truthy for. The
|
||
|
|
* `callback` is bound to `thisArg` and invoked with three arguments; (value, key, object).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The source object.
|
||
|
|
* @param {Function|String} callback|[prop1, prop2, ...] The properties to omit
|
||
|
|
* or the function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns an object without the omitted properties.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.omit({ 'name': 'moe', 'age': 40, 'userid': 'moe1' }, 'userid');
|
||
|
|
* // => { 'name': 'moe', 'age': 40 }
|
||
|
|
*
|
||
|
|
* _.omit({ 'name': 'moe', '_hint': 'knucklehead', '_seed': '96c4eb' }, function(value, key) {
|
||
|
|
* return key.charAt(0) == '_';
|
||
|
|
* });
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*/
|
||
|
|
var omit = createIterator(omitIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a two dimensional array of the given object's key-value pairs,
|
||
|
|
* i.e. `[[key1, value1], [key2, value2]]`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns new array of key-value pairs.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.pairs({ 'moe': 30, 'larry': 40, 'curly': 50 });
|
||
|
|
* // => [['moe', 30], ['larry', 40], ['curly', 50]] (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var pairs = createIterator({
|
||
|
|
'args': 'object',
|
||
|
|
'init':'[]',
|
||
|
|
'inLoop': 'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '([index, value])'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a shallow clone of `object` composed of the specified properties.
|
||
|
|
* Property names may be specified as individual arguments or as arrays of
|
||
|
|
* property names. If `callback` is passed, it will be executed for each property
|
||
|
|
* in the `object`, picking the properties `callback` returns truthy for. The
|
||
|
|
* `callback` is bound to `thisArg` and invoked with three arguments; (value, key, object).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The source object.
|
||
|
|
* @param {Function|String} callback|[prop1, prop2, ...] The properties to pick
|
||
|
|
* or the function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns an object composed of the picked properties.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.pick({ 'name': 'moe', 'age': 40, 'userid': 'moe1' }, 'name', 'age');
|
||
|
|
* // => { 'name': 'moe', 'age': 40 }
|
||
|
|
*
|
||
|
|
* _.pick({ 'name': 'moe', '_hint': 'knucklehead', '_seed': '96c4eb' }, function(value, key) {
|
||
|
|
* return key.charAt(0) != '_';
|
||
|
|
* });
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*/
|
||
|
|
var pick = createIterator(omitIteratorOptions, {
|
||
|
|
'top':
|
||
|
|
'if (typeof callback != \'function\') {\n' +
|
||
|
|
' var prop,\n' +
|
||
|
|
' props = concat.apply(ArrayProto, arguments),\n' +
|
||
|
|
' length = props.length;\n' +
|
||
|
|
' for (index = 1; index < length; index++) {\n' +
|
||
|
|
' prop = props[index];\n' +
|
||
|
|
' if (prop in object) result[prop] = object[prop]\n' +
|
||
|
|
' }\n' +
|
||
|
|
'} else {\n' +
|
||
|
|
' callback = createCallback(callback, thisArg)',
|
||
|
|
'inLoop':
|
||
|
|
'if (callback(value, index, object)) result[index] = value',
|
||
|
|
'bottom': '}'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array composed of the own enumerable property values of `object`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.values({ 'one': 1, 'two': 2, 'three': 3 });
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
var values = createIterator({
|
||
|
|
'args': 'object',
|
||
|
|
'init': '[]',
|
||
|
|
'inLoop': 'result.push(value)'
|
||
|
|
});
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if a given `target` element is present in a `collection` using strict
|
||
|
|
* equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias include
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Mixed} target The value to check for.
|
||
|
|
* @returns {Boolean} Returns `true` if the `target` element is found, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.contains([1, 2, 3], 3);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.contains({ 'name': 'moe', 'age': 40 }, 'moe');
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.contains('curly', 'ur');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var contains = createIterator({
|
||
|
|
'args': 'collection, target',
|
||
|
|
'init': 'false',
|
||
|
|
'noCharByIndex': false,
|
||
|
|
'beforeLoop': {
|
||
|
|
'array': 'if (toString.call(collection) == stringClass) return collection.indexOf(target) > -1'
|
||
|
|
},
|
||
|
|
'inLoop': 'if (value === target) return true'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed of keys returned from running each element of
|
||
|
|
* `collection` through a `callback`. The corresponding value of each key is
|
||
|
|
* the number of times the key was returned by `callback`. The `callback` is
|
||
|
|
* bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
|
||
|
|
* The `callback` argument may also be the name of a property to count by (e.g. 'length').
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function|String} callback|property The function called per iteration
|
||
|
|
* or property name to count by.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns the composed aggregate object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
|
||
|
|
* // => { '4': 1, '6': 2 }
|
||
|
|
*
|
||
|
|
* _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
|
||
|
|
* // => { '4': 1, '6': 2 }
|
||
|
|
*
|
||
|
|
* _.countBy(['one', 'two', 'three'], 'length');
|
||
|
|
* // => { '3': 2, '5': 1 }
|
||
|
|
*/
|
||
|
|
var countBy = createIterator(baseIteratorOptions, countByIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the `callback` returns a truthy value for **all** elements of a
|
||
|
|
* `collection`. The `callback` is bound to `thisArg` and invoked with three
|
||
|
|
* arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias all
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Boolean} Returns `true` if all elements pass the callback check,
|
||
|
|
* else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.every([true, 1, null, 'yes'], Boolean);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
var every = createIterator(baseIteratorOptions, everyIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Examines each element in a `collection`, returning an array of all elements
|
||
|
|
* the `callback` returns truthy for. The `callback` is bound to `thisArg` and
|
||
|
|
* invoked with three arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias select
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of elements that passed the callback check.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
|
||
|
|
* // => [2, 4, 6]
|
||
|
|
*/
|
||
|
|
var filter = createIterator(baseIteratorOptions, filterIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Examines each element in a `collection`, returning the first one the `callback`
|
||
|
|
* returns truthy for. The function returns as soon as it finds an acceptable
|
||
|
|
* element, and does not iterate over the entire `collection`. The `callback` is
|
||
|
|
* bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias detect
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the element that passed the callback check,
|
||
|
|
* else `undefined`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var even = _.find([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
|
||
|
|
* // => 2
|
||
|
|
*/
|
||
|
|
var find = createIterator(baseIteratorOptions, forEachIteratorOptions, {
|
||
|
|
'init': false,
|
||
|
|
'inLoop': 'if (callback(value, index, collection)) return value'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterates over a `collection`, executing the `callback` for each element in
|
||
|
|
* the `collection`. The `callback` is bound to `thisArg` and invoked with three
|
||
|
|
* arguments; (value, index|key, collection). Callbacks may exit iteration early
|
||
|
|
* by explicitly returning `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias each
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array|Object|String} Returns `collection`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3]).forEach(alert).join(',');
|
||
|
|
* // => alerts each number and returns '1,2,3'
|
||
|
|
*
|
||
|
|
* _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, alert);
|
||
|
|
* // => alerts each number (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var forEach = createIterator(baseIteratorOptions, forEachIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed of keys returned from running each element of
|
||
|
|
* `collection` through a `callback`. The corresponding value of each key is an
|
||
|
|
* array of elements passed to `callback` that returned the key. The `callback`
|
||
|
|
* is bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
|
||
|
|
* The `callback` argument may also be the name of a property to count by (e.g. 'length').
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function|String} callback|property The function called per iteration
|
||
|
|
* or property name to group by.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns the composed aggregate object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
|
||
|
|
* // => { '4': [4.2], '6': [6.1, 6.4] }
|
||
|
|
*
|
||
|
|
* _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
|
||
|
|
* // => { '4': [4.2], '6': [6.1, 6.4] }
|
||
|
|
*
|
||
|
|
* _.groupBy(['one', 'two', 'three'], 'length');
|
||
|
|
* // => { '3': ['one', 'two'], '5': ['three'] }
|
||
|
|
*/
|
||
|
|
var groupBy = createIterator(baseIteratorOptions, countByIteratorOptions, {
|
||
|
|
'inLoop':
|
||
|
|
'var prop = callback(value, index, collection);\n' +
|
||
|
|
'(hasOwnProperty.call(result, prop) ? result[prop] : result[prop] = []).push(value)'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Invokes the method named by `methodName` on each element in the `collection`,
|
||
|
|
* returning an array of the results of each invoked method. Additional arguments
|
||
|
|
* will be passed to each invoked method. If `methodName` is a function it will
|
||
|
|
* be invoked for, and `this` bound to, each element in the `collection`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function|String} methodName The name of the method to invoke or
|
||
|
|
* the function invoked per iteration.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to invoke the method with.
|
||
|
|
* @returns {Array} Returns a new array of the results of each invoked method.
|
||
|
|
* @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 = createIterator(mapIteratorOptions, {
|
||
|
|
'args': 'collection, methodName',
|
||
|
|
'top':
|
||
|
|
'var args = slice.call(arguments, 2),\n' +
|
||
|
|
' isFunc = typeof methodName == \'function\'',
|
||
|
|
'inLoop': {
|
||
|
|
'array':
|
||
|
|
'result[index] = (isFunc ? methodName : value[methodName]).apply(value, args)',
|
||
|
|
'object':
|
||
|
|
'result' + (isKeysFast ? '[ownIndex] = ' : '.push') +
|
||
|
|
'((isFunc ? methodName : value[methodName]).apply(value, args))'
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of values by running each element in the `collection`
|
||
|
|
* through a `callback`. The `callback` is bound to `thisArg` and invoked with
|
||
|
|
* three arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias collect
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of the results of each `callback` execution.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.map([1, 2, 3], function(num) { return num * 3; });
|
||
|
|
* // => [3, 6, 9]
|
||
|
|
*
|
||
|
|
* _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
|
||
|
|
* // => [3, 6, 9] (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var map = createIterator(baseIteratorOptions, mapIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the value of a specified property from all elements in
|
||
|
|
* the `collection`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {String} property The property to pluck.
|
||
|
|
* @returns {Array} Returns a new array of property values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 },
|
||
|
|
* { 'name': 'curly', 'age': 60 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.pluck(stooges, 'name');
|
||
|
|
* // => ['moe', 'larry', 'curly']
|
||
|
|
*/
|
||
|
|
var pluck = createIterator(mapIteratorOptions, {
|
||
|
|
'args': 'collection, property',
|
||
|
|
'inLoop': {
|
||
|
|
'array': 'result[index] = value[property]',
|
||
|
|
'object': 'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '(value[property])'
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Boils down a `collection` to a single value. The initial state of the
|
||
|
|
* reduction is `accumulator` and each successive step of it should be returned
|
||
|
|
* by the `callback`. The `callback` is bound to `thisArg` and invoked with 4
|
||
|
|
* arguments; for arrays they are (accumulator, value, index|key, collection).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias foldl, inject
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [accumulator] Initial value of the accumulator.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the accumulated value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var sum = _.reduce([1, 2, 3], function(memo, num) { return memo + num; });
|
||
|
|
* // => 6
|
||
|
|
*/
|
||
|
|
var reduce = createIterator({
|
||
|
|
'args': 'collection, callback, accumulator, thisArg',
|
||
|
|
'init': 'accumulator',
|
||
|
|
'top':
|
||
|
|
'var noaccum = arguments.length < 3;\n' +
|
||
|
|
'callback = createCallback(callback, thisArg)',
|
||
|
|
'beforeLoop': {
|
||
|
|
'array': 'if (noaccum) result = iteratee[++index]'
|
||
|
|
},
|
||
|
|
'inLoop': {
|
||
|
|
'array':
|
||
|
|
'result = callback(result, value, index, collection)',
|
||
|
|
'object':
|
||
|
|
'result = noaccum\n' +
|
||
|
|
' ? (noaccum = false, value)\n' +
|
||
|
|
' : callback(result, value, index, collection)'
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The right-associative version of `_.reduce`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias foldr
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [accumulator] Initial value of the accumulator.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the accumulated value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var list = [[0, 1], [2, 3], [4, 5]];
|
||
|
|
* var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []);
|
||
|
|
* // => [4, 5, 2, 3, 0, 1]
|
||
|
|
*/
|
||
|
|
function reduceRight(collection, callback, accumulator, thisArg) {
|
||
|
|
var iteratee = collection,
|
||
|
|
length = collection ? collection.length : 0,
|
||
|
|
noaccum = arguments.length < 3;
|
||
|
|
|
||
|
|
if (length !== +length) {
|
||
|
|
var props = keys(collection);
|
||
|
|
length = props.length;
|
||
|
|
} else if (noCharByIndex && toString.call(collection) == stringClass) {
|
||
|
|
iteratee = collection.split('');
|
||
|
|
}
|
||
|
|
forEach(collection, function(value, index, object) {
|
||
|
|
index = props ? props[--length] : --length;
|
||
|
|
accumulator = noaccum
|
||
|
|
? (noaccum = false, iteratee[index])
|
||
|
|
: callback.call(thisArg, accumulator, iteratee[index], index, object);
|
||
|
|
});
|
||
|
|
return accumulator;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The opposite of `_.filter`, this method returns the values of a
|
||
|
|
* `collection` that `callback` does **not** return truthy for.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of elements that did **not** pass the
|
||
|
|
* callback check.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
|
||
|
|
* // => [1, 3, 5]
|
||
|
|
*/
|
||
|
|
var reject = createIterator(baseIteratorOptions, filterIteratorOptions, {
|
||
|
|
'inLoop': '!' + filterIteratorOptions.inLoop
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the size of the `collection` by returning `collection.length` for arrays
|
||
|
|
* and array-like objects or the number of own enumerable properties for objects.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to inspect.
|
||
|
|
* @returns {Number} Returns `collection.length` or number of own enumerable properties.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.size([1, 2]);
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* _.size({ 'one': 1, 'two': 2, 'three': 3 });
|
||
|
|
* // => 3
|
||
|
|
*
|
||
|
|
* _.size('curly');
|
||
|
|
* // => 5
|
||
|
|
*/
|
||
|
|
function size(collection) {
|
||
|
|
var length = collection ? collection.length : 0;
|
||
|
|
return length === +length ? length : keys(collection).length;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the `callback` returns a truthy value for **any** element of a
|
||
|
|
* `collection`. The function returns as soon as it finds passing value, and
|
||
|
|
* does not iterate over the entire `collection`. The `callback` is bound to
|
||
|
|
* `thisArg` and invoked with three arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias any
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Boolean} Returns `true` if any element passes the callback check,
|
||
|
|
* else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.some([null, 0, 'yes', false]);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var some = createIterator(baseIteratorOptions, everyIteratorOptions, {
|
||
|
|
'init': 'false',
|
||
|
|
'inLoop': everyIteratorOptions.inLoop.replace('!', '')
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array, stable sorted in ascending order by the results of
|
||
|
|
* running each element of `collection` through a `callback`. The `callback`
|
||
|
|
* is bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
|
||
|
|
* The `callback` argument may also be the name of a property to sort by (e.g. 'length').
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function|String} callback|property The function called per iteration
|
||
|
|
* or property name to sort by.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of sorted elements.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
|
||
|
|
* // => [3, 1, 2]
|
||
|
|
*
|
||
|
|
* _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
|
||
|
|
* // => [3, 1, 2]
|
||
|
|
*
|
||
|
|
* _.sortBy(['larry', 'brendan', 'moe'], 'length');
|
||
|
|
* // => ['moe', 'larry', 'brendan']
|
||
|
|
*/
|
||
|
|
var sortBy = createIterator(baseIteratorOptions, countByIteratorOptions, mapIteratorOptions, {
|
||
|
|
'inLoop': {
|
||
|
|
'array':
|
||
|
|
'result[index] = {\n' +
|
||
|
|
' criteria: callback(value, index, collection),\n' +
|
||
|
|
' index: index,\n' +
|
||
|
|
' value: value\n' +
|
||
|
|
'}',
|
||
|
|
'object':
|
||
|
|
'result' + (isKeysFast ? '[ownIndex] = ' : '.push') + '({\n' +
|
||
|
|
' criteria: callback(value, index, collection),\n' +
|
||
|
|
' index: index,\n' +
|
||
|
|
' value: value\n' +
|
||
|
|
'})'
|
||
|
|
},
|
||
|
|
'bottom':
|
||
|
|
'result.sort(compareAscending);\n' +
|
||
|
|
'length = result.length;\n' +
|
||
|
|
'while (length--) {\n' +
|
||
|
|
' result[length] = result[length].value\n' +
|
||
|
|
'}'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts the `collection`, to an array.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to convert.
|
||
|
|
* @returns {Array} Returns the new converted array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
|
||
|
|
* // => [2, 3, 4]
|
||
|
|
*/
|
||
|
|
function toArray(collection) {
|
||
|
|
if (!collection) {
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
var length = collection.length;
|
||
|
|
if (length === +length) {
|
||
|
|
return (noArraySliceOnStrings ? toString.call(collection) == stringClass : typeof collection == 'string')
|
||
|
|
? collection.split('')
|
||
|
|
: slice.call(collection);
|
||
|
|
}
|
||
|
|
return values(collection);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Examines each element in a `collection`, returning an array of all elements
|
||
|
|
* that contain the given `properties`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Object} properties The object of properties/values to filter by.
|
||
|
|
* @returns {Array} Returns a new array of elements that contain the given `properties`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 },
|
||
|
|
* { 'name': 'curly', 'age': 60 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.where(stooges, { 'age': 40 });
|
||
|
|
* // => [{ 'name': 'moe', 'age': 40 }]
|
||
|
|
*/
|
||
|
|
var where = createIterator(filterIteratorOptions, {
|
||
|
|
'args': 'collection, properties',
|
||
|
|
'top':
|
||
|
|
'var props = [];\n' +
|
||
|
|
'forIn(properties, function(value, prop) { props.push(prop) });\n' +
|
||
|
|
'var propsLength = props.length',
|
||
|
|
'inLoop':
|
||
|
|
'for (var prop, pass = true, propIndex = 0; propIndex < propsLength; propIndex++) {\n' +
|
||
|
|
' prop = props[propIndex];\n' +
|
||
|
|
' if (!(pass = value[prop] === properties[prop])) break\n' +
|
||
|
|
'}\n' +
|
||
|
|
'pass && result.push(value)'
|
||
|
|
});
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array with all falsey values of `array` removed. The values
|
||
|
|
* `false`, `null`, `0`, `""`, `undefined` and `NaN` are all falsey.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to compact.
|
||
|
|
* @returns {Array} Returns a new filtered array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.compact([0, 1, false, 2, '', 3]);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
function compact(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
if (array[index]) {
|
||
|
|
result.push(array[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of `array` elements not present in the other arrays
|
||
|
|
* using strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to process.
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to check.
|
||
|
|
* @returns {Array} Returns a new array of `array` elements not present in the
|
||
|
|
* other arrays.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
|
||
|
|
* // => [1, 3, 4]
|
||
|
|
*/
|
||
|
|
function difference(array) {
|
||
|
|
var result = [];
|
||
|
|
if (!array) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
var index = -1,
|
||
|
|
length = array.length,
|
||
|
|
flattened = concat.apply(ArrayProto, arguments),
|
||
|
|
contains = cachedContains(flattened, length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
if (!contains(value)) {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the first element of the `array`. Pass `n` to return the first `n`
|
||
|
|
* elements of the `array`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias head, take
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Number} [n] The number of elements to return.
|
||
|
|
* @param- {Object} [guard] Internally used to allow this method to work with
|
||
|
|
* others like `_.map` without using their callback `index` argument for `n`.
|
||
|
|
* @returns {Mixed} Returns the first element or an array of the first `n`
|
||
|
|
* elements of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.first([5, 4, 3, 2, 1]);
|
||
|
|
* // => 5
|
||
|
|
*/
|
||
|
|
function first(array, n, guard) {
|
||
|
|
if (array) {
|
||
|
|
return (n == null || guard) ? array[0] : slice.call(array, 0, n);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Flattens a nested array (the nesting can be to any depth). If `shallow` is
|
||
|
|
* truthy, `array` will only be flattened a single level.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to compact.
|
||
|
|
* @param {Boolean} shallow A flag to indicate only flattening a single level.
|
||
|
|
* @returns {Array} Returns a new flattened array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.flatten([1, [2], [3, [[4]]]]);
|
||
|
|
* // => [1, 2, 3, 4];
|
||
|
|
*
|
||
|
|
* _.flatten([1, [2], [3, [[4]]]], true);
|
||
|
|
* // => [1, 2, 3, [[4]]];
|
||
|
|
*/
|
||
|
|
function flatten(array, shallow) {
|
||
|
|
var value,
|
||
|
|
index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
value = array[index];
|
||
|
|
|
||
|
|
// recursively flatten arrays (susceptible to call stack limits)
|
||
|
|
if (isArray(value)) {
|
||
|
|
push.apply(result, shallow ? value : flatten(value));
|
||
|
|
} else {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the index at which the first occurrence of `value` is found using
|
||
|
|
* strict equality for comparisons, i.e. `===`. If the `array` is already
|
||
|
|
* sorted, passing `true` for `isSorted` will run a faster binary search.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to search.
|
||
|
|
* @param {Mixed} value The value to search for.
|
||
|
|
* @param {Boolean|Number} [fromIndex=0] The index to start searching from or
|
||
|
|
* `true` to perform a binary search on a sorted `array`.
|
||
|
|
* @returns {Number} Returns the index of the matched value or `-1`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.indexOf([1, 2, 3, 1, 2, 3], 2);
|
||
|
|
* // => 1
|
||
|
|
*
|
||
|
|
* _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
|
||
|
|
* // => 4
|
||
|
|
*
|
||
|
|
* _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
|
||
|
|
* // => 2
|
||
|
|
*/
|
||
|
|
function indexOf(array, value, fromIndex) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0;
|
||
|
|
|
||
|
|
if (typeof fromIndex == 'number') {
|
||
|
|
index = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0) - 1;
|
||
|
|
} else if (fromIndex) {
|
||
|
|
index = sortedIndex(array, value);
|
||
|
|
return array[index] === value ? index : -1;
|
||
|
|
}
|
||
|
|
while (++index < length) {
|
||
|
|
if (array[index] === value) {
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets all but the last element of `array`. Pass `n` to exclude the last `n`
|
||
|
|
* elements from the result.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Number} [n] The number of elements to return.
|
||
|
|
* @param- {Object} [guard] Internally used to allow this method to work with
|
||
|
|
* others like `_.map` without using their callback `index` argument for `n`.
|
||
|
|
* @returns {Array} Returns all but the last element or `n` elements of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.initial([3, 2, 1]);
|
||
|
|
* // => [3, 2]
|
||
|
|
*/
|
||
|
|
function initial(array, n, guard) {
|
||
|
|
return array
|
||
|
|
? slice.call(array, 0, -((n == null || guard) ? 1 : n))
|
||
|
|
: [];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the intersection of all the passed-in arrays using strict equality
|
||
|
|
* for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to process.
|
||
|
|
* @returns {Array} Returns a new array of unique elements, in order, that are
|
||
|
|
* present in **all** of the arrays.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.intersection([1, 2, 3], [101, 2, 1, 10], [2, 1]);
|
||
|
|
* // => [1, 2]
|
||
|
|
*/
|
||
|
|
function intersection(array) {
|
||
|
|
var argsLength = arguments.length,
|
||
|
|
cache = [],
|
||
|
|
index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
array: while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
if (indexOf(result, value) < 0) {
|
||
|
|
for (var argsIndex = 1; argsIndex < argsLength; argsIndex++) {
|
||
|
|
if (!(cache[argsIndex] || (cache[argsIndex] = cachedContains(arguments[argsIndex])))(value)) {
|
||
|
|
continue array;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the last element of the `array`. Pass `n` to return the last `n`
|
||
|
|
* elements of the `array`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Number} [n] The number of elements to return.
|
||
|
|
* @param- {Object} [guard] Internally used to allow this method to work with
|
||
|
|
* others like `_.map` without using their callback `index` argument for `n`.
|
||
|
|
* @returns {Mixed} Returns the last element or an array of the last `n`
|
||
|
|
* elements of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.last([3, 2, 1]);
|
||
|
|
* // => 1
|
||
|
|
*/
|
||
|
|
function last(array, n, guard) {
|
||
|
|
if (array) {
|
||
|
|
var length = array.length;
|
||
|
|
return (n == null || guard) ? array[length - 1] : slice.call(array, -n || length);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the index at which the last occurrence of `value` is found using
|
||
|
|
* strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to search.
|
||
|
|
* @param {Mixed} value The value to search for.
|
||
|
|
* @param {Number} [fromIndex=array.length-1] The index to start searching from.
|
||
|
|
* @returns {Number} Returns the index of the matched value or `-1`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
|
||
|
|
* // => 4
|
||
|
|
*
|
||
|
|
* _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
|
||
|
|
* // => 1
|
||
|
|
*/
|
||
|
|
function lastIndexOf(array, value, fromIndex) {
|
||
|
|
var index = array ? array.length : 0;
|
||
|
|
if (typeof fromIndex == 'number') {
|
||
|
|
index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1;
|
||
|
|
}
|
||
|
|
while (index--) {
|
||
|
|
if (array[index] === value) {
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the maximum value of an `array`. If `callback` is passed,
|
||
|
|
* it will be executed for each value in the `array` to generate the
|
||
|
|
* criterion by which the value is ranked. The `callback` is bound to
|
||
|
|
* `thisArg` and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to iterate over.
|
||
|
|
* @param {Function} [callback] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the maximum value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 },
|
||
|
|
* { 'name': 'curly', 'age': 60 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.max(stooges, function(stooge) { return stooge.age; });
|
||
|
|
* // => { 'name': 'curly', 'age': 60 };
|
||
|
|
*/
|
||
|
|
function max(array, callback, thisArg) {
|
||
|
|
var current,
|
||
|
|
computed = -Infinity,
|
||
|
|
index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = computed;
|
||
|
|
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
while (++index < length) {
|
||
|
|
current = callback(array[index], index, array);
|
||
|
|
if (current > computed) {
|
||
|
|
computed = current;
|
||
|
|
result = array[index];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the minimum value of an `array`. If `callback` is passed,
|
||
|
|
* it will be executed for each value in the `array` to generate the
|
||
|
|
* criterion by which the value is ranked. The `callback` is bound to `thisArg`
|
||
|
|
* and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to iterate over.
|
||
|
|
* @param {Function} [callback] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the minimum value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.min([10, 5, 100, 2, 1000]);
|
||
|
|
* // => 2
|
||
|
|
*/
|
||
|
|
function min(array, callback, thisArg) {
|
||
|
|
var current,
|
||
|
|
computed = Infinity,
|
||
|
|
index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = computed;
|
||
|
|
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
while (++index < length) {
|
||
|
|
current = callback(array[index], index, array);
|
||
|
|
if (current < computed) {
|
||
|
|
computed = current;
|
||
|
|
result = array[index];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed from arrays of `keys` and `values`. Pass either
|
||
|
|
* a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`, or
|
||
|
|
* two arrays, one of `keys` and one of corresponding `values`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} keys The array of keys.
|
||
|
|
* @param {Array} [values=[]] The array of values.
|
||
|
|
* @returns {Object} Returns an object composed of the given keys and
|
||
|
|
* corresponding values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.object(['moe', 'larry', 'curly'], [30, 40, 50]);
|
||
|
|
* // => { 'moe': 30, 'larry': 40, 'curly': 50 }
|
||
|
|
*/
|
||
|
|
function object(keys, values) {
|
||
|
|
var index = -1,
|
||
|
|
length = keys ? keys.length : 0,
|
||
|
|
result = {};
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
if (values) {
|
||
|
|
result[keys[index]] = values[index];
|
||
|
|
} else {
|
||
|
|
result[keys[index][0]] = keys[index][1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of numbers (positive and/or negative) progressing from
|
||
|
|
* `start` up to but not including `stop`. This method is a port of Python's
|
||
|
|
* `range()` function. See http://docs.python.org/library/functions.html#range.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @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 descrement by.
|
||
|
|
* @returns {Array} Returns a new range array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.range(10);
|
||
|
|
* // => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
||
|
|
*
|
||
|
|
* _.range(1, 11);
|
||
|
|
* // => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
|
||
|
|
*
|
||
|
|
* _.range(0, 30, 5);
|
||
|
|
* // => [0, 5, 10, 15, 20, 25]
|
||
|
|
*
|
||
|
|
* _.range(0, -10, -1);
|
||
|
|
* // => [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
|
||
|
|
*
|
||
|
|
* _.range(0);
|
||
|
|
* // => []
|
||
|
|
*/
|
||
|
|
function range(start, end, step) {
|
||
|
|
start = +start || 0;
|
||
|
|
step = +step || 1;
|
||
|
|
|
||
|
|
if (end == null) {
|
||
|
|
end = start;
|
||
|
|
start = 0;
|
||
|
|
}
|
||
|
|
// use `Array(length)` so V8 will avoid the slower "dictionary" mode
|
||
|
|
// http://www.youtube.com/watch?v=XAqIpGU8ZZk#t=16m27s
|
||
|
|
var index = -1,
|
||
|
|
length = nativeMax(0, Math.ceil((end - start) / step)),
|
||
|
|
result = Array(length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = start;
|
||
|
|
start += step;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The opposite of `_.initial`, this method gets all but the first value of
|
||
|
|
* `array`. Pass `n` to exclude the first `n` values from the result.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias drop, tail
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Number} [n] The number of elements to return.
|
||
|
|
* @param- {Object} [guard] Internally used to allow this method to work with
|
||
|
|
* others like `_.map` without using their callback `index` argument for `n`.
|
||
|
|
* @returns {Array} Returns all but the first value or `n` values of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.rest([3, 2, 1]);
|
||
|
|
* // => [2, 1]
|
||
|
|
*/
|
||
|
|
function rest(array, n, guard) {
|
||
|
|
return array
|
||
|
|
? slice.call(array, (n == null || guard) ? 1 : n)
|
||
|
|
: [];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of shuffled `array` values, using a version of the
|
||
|
|
* Fisher-Yates shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to shuffle.
|
||
|
|
* @returns {Array} Returns a new shuffled array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.shuffle([1, 2, 3, 4, 5, 6]);
|
||
|
|
* // => [4, 1, 6, 3, 5, 2]
|
||
|
|
*/
|
||
|
|
function shuffle(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = Array(length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var rand = nativeFloor(nativeRandom() * (index + 1));
|
||
|
|
result[index] = result[rand];
|
||
|
|
result[rand] = array[index];
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uses a binary search to determine the smallest index at which the `value`
|
||
|
|
* should be inserted into `array` in order to maintain the sort order of the
|
||
|
|
* sorted `array`. If `callback` is passed, it will be executed for `value` and
|
||
|
|
* each element in `array` to compute their sort ranking. The `callback` is
|
||
|
|
* bound to `thisArg` and invoked with one argument; (value). The `callback`
|
||
|
|
* argument may also be the name of a property to order by.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to iterate over.
|
||
|
|
* @param {Mixed} value The value to evaluate.
|
||
|
|
* @param {Function|String} [callback=identity|property] The function called
|
||
|
|
* per iteration or property name to order by.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Number} Returns the index at which the value should be inserted
|
||
|
|
* into `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.sortedIndex([20, 30, 50], 40);
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* var dict = {
|
||
|
|
* 'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
|
||
|
|
* return dict.wordToNumber[word];
|
||
|
|
* });
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
|
||
|
|
* return this.wordToNumber[word];
|
||
|
|
* }, dict);
|
||
|
|
* // => 2
|
||
|
|
*/
|
||
|
|
function sortedIndex(array, value, callback, thisArg) {
|
||
|
|
var low = 0,
|
||
|
|
high = array ? array.length : low;
|
||
|
|
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
value = callback(value);
|
||
|
|
while (low < high) {
|
||
|
|
var mid = (low + high) >>> 1;
|
||
|
|
callback(array[mid]) < value ? low = mid + 1 : high = mid;
|
||
|
|
}
|
||
|
|
return low;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the union of the passed-in arrays using strict equality for
|
||
|
|
* comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to process.
|
||
|
|
* @returns {Array} Returns a new array of unique values, in order, that are
|
||
|
|
* present in one or more of the arrays.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.union([1, 2, 3], [101, 2, 1, 10], [2, 1]);
|
||
|
|
* // => [1, 2, 3, 101, 10]
|
||
|
|
*/
|
||
|
|
function union() {
|
||
|
|
var index = -1,
|
||
|
|
flattened = concat.apply(ArrayProto, arguments),
|
||
|
|
length = flattened.length,
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
if (indexOf(result, flattened[index]) < 0) {
|
||
|
|
result.push(flattened[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a duplicate-value-free version of the `array` using strict equality
|
||
|
|
* for comparisons, i.e. `===`. If the `array` is already sorted, passing `true`
|
||
|
|
* for `isSorted` will run a faster algorithm. If `callback` is passed, each
|
||
|
|
* element of `array` is passed through a callback` before uniqueness is computed.
|
||
|
|
* The `callback` is bound to `thisArg` and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias unique
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to process.
|
||
|
|
* @param {Boolean} [isSorted=false] A flag to indicate that the `array` is already sorted.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a duplicate-value-free array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.uniq([1, 2, 1, 3, 1]);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* _.uniq([1, 1, 2, 2, 3], true);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* _.uniq([1, 2, 1.5, 3, 2.5], function(num) { return Math.floor(num); });
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* _.uniq([1, 2, 1.5, 3, 2.5], function(num) { return this.floor(num); }, Math);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
function uniq(array, isSorted, callback, thisArg) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = [],
|
||
|
|
seen = [];
|
||
|
|
|
||
|
|
// juggle arguments
|
||
|
|
if (typeof isSorted == 'function') {
|
||
|
|
thisArg = callback;
|
||
|
|
callback = isSorted;
|
||
|
|
isSorted = false;
|
||
|
|
}
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
while (++index < length) {
|
||
|
|
var computed = callback(array[index], index, array);
|
||
|
|
if (isSorted
|
||
|
|
? !index || seen[seen.length - 1] !== computed
|
||
|
|
: indexOf(seen, computed) < 0
|
||
|
|
) {
|
||
|
|
seen.push(computed);
|
||
|
|
result.push(array[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array with all occurrences of the passed values removed using
|
||
|
|
* strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to filter.
|
||
|
|
* @param {Mixed} [value1, value2, ...] Values to remove.
|
||
|
|
* @returns {Array} Returns a new filtered array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
|
||
|
|
* // => [2, 3, 4]
|
||
|
|
*/
|
||
|
|
function without(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
contains = cachedContains(arguments, 1, 20),
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
if (!contains(value)) {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Groups the elements of each array at their corresponding indexes. Useful for
|
||
|
|
* separate data sources that are coordinated through matching array indexes.
|
||
|
|
* For a matrix of nested arrays, `_.zip.apply(...)` can transpose the matrix
|
||
|
|
* in a similar fashion.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to process.
|
||
|
|
* @returns {Array} Returns a new array of grouped elements.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.zip(['moe', 'larry', 'curly'], [30, 40, 50], [true, false, false]);
|
||
|
|
* // => [['moe', 30, true], ['larry', 40, false], ['curly', 50, false]]
|
||
|
|
*/
|
||
|
|
function zip(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? max(pluck(arguments, 'length')) : 0,
|
||
|
|
result = Array(length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = pluck(arguments, index);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that is restricted to executing only after it is
|
||
|
|
* called `n` times.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Number} n The number of times the function must be called before
|
||
|
|
* it is executed.
|
||
|
|
* @param {Function} func The function to restrict.
|
||
|
|
* @returns {Function} Returns the new restricted function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var renderNotes = _.after(notes.length, render);
|
||
|
|
* _.forEach(notes, function(note) {
|
||
|
|
* note.asyncSave({ 'success': renderNotes });
|
||
|
|
* });
|
||
|
|
* // `renderNotes` is run once, after all notes have saved
|
||
|
|
*/
|
||
|
|
function after(n, func) {
|
||
|
|
if (n < 1) {
|
||
|
|
return func();
|
||
|
|
}
|
||
|
|
return function() {
|
||
|
|
if (--n < 1) {
|
||
|
|
return func.apply(this, arguments);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes `func` with the `this`
|
||
|
|
* binding of `thisArg` and prepends any additional `bind` arguments to those
|
||
|
|
* passed to the bound function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to bind.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `func`.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new bound function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var func = function(greeting) {
|
||
|
|
* return greeting + ' ' + this.name;
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* func = _.bind(func, { 'name': 'moe' }, 'hi');
|
||
|
|
* func();
|
||
|
|
* // => 'hi moe'
|
||
|
|
*/
|
||
|
|
function bind(func, thisArg) {
|
||
|
|
// use `Function#bind` if it exists and is fast
|
||
|
|
// (in V8 `Function#bind` is slower except when partially applied)
|
||
|
|
return isBindFast || (nativeBind && arguments.length > 2)
|
||
|
|
? nativeBind.call.apply(nativeBind, arguments)
|
||
|
|
: createBound(func, thisArg, slice.call(arguments, 2));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Binds methods on `object` to `object`, overwriting the existing method.
|
||
|
|
* If no method names are provided, all the function properties of `object`
|
||
|
|
* will be bound.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Object} object The object to bind and assign the bound methods to.
|
||
|
|
* @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
|
||
|
|
* @returns {Object} Returns `object`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var buttonView = {
|
||
|
|
* 'label': 'lodash',
|
||
|
|
* 'onClick': function() { alert('clicked: ' + this.label); }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.bindAll(buttonView);
|
||
|
|
* jQuery('#lodash_button').on('click', buttonView.onClick);
|
||
|
|
* // => When the button is clicked, `this.label` will have the correct value
|
||
|
|
*/
|
||
|
|
var bindAll = createIterator({
|
||
|
|
'useHas': false,
|
||
|
|
'useStrict': false,
|
||
|
|
'args': 'object',
|
||
|
|
'top':
|
||
|
|
'var funcs = arguments,\n' +
|
||
|
|
' length = funcs.length;\n' +
|
||
|
|
'if (length > 1) {\n' +
|
||
|
|
' for (var index = 1; index < length; index++) {\n' +
|
||
|
|
' result[funcs[index]] = bind(result[funcs[index]], result)\n' +
|
||
|
|
' }\n' +
|
||
|
|
' return result\n' +
|
||
|
|
'}',
|
||
|
|
'inLoop':
|
||
|
|
'if (isFunction(value)) {\n' +
|
||
|
|
' result[index] = bind(value, result)\n' +
|
||
|
|
'}'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that is the composition of the passed functions,
|
||
|
|
* where each function consumes the return value of the function that follows.
|
||
|
|
* In math terms, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} [func1, func2, ...] Functions to compose.
|
||
|
|
* @returns {Function} Returns the new composed function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var greet = function(name) { return 'hi: ' + name; };
|
||
|
|
* var exclaim = function(statement) { return statement + '!'; };
|
||
|
|
* var welcome = _.compose(exclaim, greet);
|
||
|
|
* welcome('moe');
|
||
|
|
* // => 'hi: moe!'
|
||
|
|
*/
|
||
|
|
function compose() {
|
||
|
|
var funcs = arguments;
|
||
|
|
return function() {
|
||
|
|
var args = arguments,
|
||
|
|
length = funcs.length;
|
||
|
|
|
||
|
|
while (length--) {
|
||
|
|
args = [funcs[length].apply(this, args)];
|
||
|
|
}
|
||
|
|
return args[0];
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that will delay the execution of `func` until after
|
||
|
|
* `wait` milliseconds have elapsed since the last time it was invoked. Pass
|
||
|
|
* `true` for `immediate` to cause debounce to invoke `func` on the leading,
|
||
|
|
* instead of the trailing, edge of the `wait` timeout. Subsequent calls to
|
||
|
|
* the debounced function will return the result of the last `func` call.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to debounce.
|
||
|
|
* @param {Number} wait The number of milliseconds to delay.
|
||
|
|
* @param {Boolean} immediate A flag to indicate execution is on the leading
|
||
|
|
* edge of the timeout.
|
||
|
|
* @returns {Function} Returns the new debounced function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var lazyLayout = _.debounce(calculateLayout, 300);
|
||
|
|
* jQuery(window).on('resize', lazyLayout);
|
||
|
|
*/
|
||
|
|
function debounce(func, wait, immediate) {
|
||
|
|
var args,
|
||
|
|
result,
|
||
|
|
thisArg,
|
||
|
|
timeoutId;
|
||
|
|
|
||
|
|
function delayed() {
|
||
|
|
timeoutId = null;
|
||
|
|
if (!immediate) {
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return function() {
|
||
|
|
var isImmediate = immediate && !timeoutId;
|
||
|
|
args = arguments;
|
||
|
|
thisArg = this;
|
||
|
|
|
||
|
|
clearTimeout(timeoutId);
|
||
|
|
timeoutId = setTimeout(delayed, wait);
|
||
|
|
|
||
|
|
if (isImmediate) {
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Executes the `func` function after `wait` milliseconds. Additional arguments
|
||
|
|
* will be passed to `func` when it is invoked.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to delay.
|
||
|
|
* @param {Number} wait The number of milliseconds to delay execution.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with.
|
||
|
|
* @returns {Number} Returns the `setTimeout` timeout id.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var log = _.bind(console.log, console);
|
||
|
|
* _.delay(log, 1000, 'logged later');
|
||
|
|
* // => 'logged later' (Appears after one second.)
|
||
|
|
*/
|
||
|
|
function delay(func, wait) {
|
||
|
|
var args = slice.call(arguments, 2);
|
||
|
|
return setTimeout(function() { return func.apply(undefined, args); }, wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Defers executing the `func` function until the current call stack has cleared.
|
||
|
|
* Additional arguments will be passed to `func` when it is invoked.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to defer.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with.
|
||
|
|
* @returns {Number} Returns the `setTimeout` timeout id.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.defer(function() { alert('deferred'); });
|
||
|
|
* // returns from the function before `alert` is called
|
||
|
|
*/
|
||
|
|
function defer(func) {
|
||
|
|
var args = slice.call(arguments, 1);
|
||
|
|
return setTimeout(function() { return func.apply(undefined, args); }, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes `object[methodName]` and
|
||
|
|
* prepends any additional `lateBind` arguments to those passed to the bound
|
||
|
|
* function. This method differs from `_.bind` by allowing bound functions to
|
||
|
|
* reference methods that will be redefined or don't yet exist.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Object} object The object the method belongs to.
|
||
|
|
* @param {String} methodName The method name.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new bound function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var object = {
|
||
|
|
* 'name': 'moe',
|
||
|
|
* 'greet': function(greeting) {
|
||
|
|
* return greeting + ' ' + this.name;
|
||
|
|
* }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* var func = _.lateBind(object, 'greet', 'hi');
|
||
|
|
* func();
|
||
|
|
* // => 'hi moe'
|
||
|
|
*
|
||
|
|
* object.greet = function(greeting) {
|
||
|
|
* return greeting + ', ' + this.name + '!';
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* func();
|
||
|
|
* // => 'hi, moe!'
|
||
|
|
*/
|
||
|
|
function lateBind(object, methodName) {
|
||
|
|
return createBound(methodName, object, slice.call(arguments, 2));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that memoizes the result of `func`. If `resolver` is
|
||
|
|
* passed, it will be used to determine the cache key for storing the result
|
||
|
|
* based on the arguments passed to the memoized function. By default, the first
|
||
|
|
* argument passed to the memoized function is used as the cache key.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to have its output memoized.
|
||
|
|
* @param {Function} [resolver] A function used to resolve the cache key.
|
||
|
|
* @returns {Function} Returns the new memoizing function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var fibonacci = _.memoize(function(n) {
|
||
|
|
* return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
|
||
|
|
* });
|
||
|
|
*/
|
||
|
|
function memoize(func, resolver) {
|
||
|
|
var cache = {};
|
||
|
|
return function() {
|
||
|
|
var prop = resolver ? resolver.apply(this, arguments) : arguments[0];
|
||
|
|
return hasOwnProperty.call(cache, prop)
|
||
|
|
? cache[prop]
|
||
|
|
: (cache[prop] = func.apply(this, arguments));
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that is restricted to one execution. Repeat calls to
|
||
|
|
* the function will return the value of the first call.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to restrict.
|
||
|
|
* @returns {Function} Returns the new restricted function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var initialize = _.once(createApplication);
|
||
|
|
* initialize();
|
||
|
|
* initialize();
|
||
|
|
* // Application is only created once.
|
||
|
|
*/
|
||
|
|
function once(func) {
|
||
|
|
var result,
|
||
|
|
ran = false;
|
||
|
|
|
||
|
|
return function() {
|
||
|
|
if (ran) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
ran = true;
|
||
|
|
result = func.apply(this, arguments);
|
||
|
|
|
||
|
|
// clear the `func` variable so the function may be garbage collected
|
||
|
|
func = null;
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes `func` with any additional
|
||
|
|
* `partial` arguments prepended to those passed to the new function. This method
|
||
|
|
* is similar to `bind`, except it does **not** alter the `this` binding.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to partially apply arguments to.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new partially applied function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var greet = function(greeting, name) { return greeting + ': ' + name; };
|
||
|
|
* var hi = _.partial(greet, 'hi');
|
||
|
|
* hi('moe');
|
||
|
|
* // => 'hi: moe'
|
||
|
|
*/
|
||
|
|
function partial(func) {
|
||
|
|
return createBound(func, slice.call(arguments, 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when executed, will only call the `func`
|
||
|
|
* function at most once per every `wait` milliseconds. If the throttled
|
||
|
|
* function is invoked more than once during the `wait` timeout, `func` will
|
||
|
|
* also be called on the trailing edge of the timeout. Subsequent calls to the
|
||
|
|
* throttled function will return the result of the last `func` call.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to throttle.
|
||
|
|
* @param {Number} wait The number of milliseconds to throttle executions to.
|
||
|
|
* @returns {Function} Returns the new throttled function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var throttled = _.throttle(updatePosition, 100);
|
||
|
|
* jQuery(window).on('scroll', throttled);
|
||
|
|
*/
|
||
|
|
function throttle(func, wait) {
|
||
|
|
var args,
|
||
|
|
result,
|
||
|
|
thisArg,
|
||
|
|
timeoutId,
|
||
|
|
lastCalled = 0;
|
||
|
|
|
||
|
|
function trailingCall() {
|
||
|
|
lastCalled = new Date;
|
||
|
|
timeoutId = null;
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
|
||
|
|
return function() {
|
||
|
|
var now = new Date,
|
||
|
|
remain = wait - (now - lastCalled);
|
||
|
|
|
||
|
|
args = arguments;
|
||
|
|
thisArg = this;
|
||
|
|
|
||
|
|
if (remain <= 0) {
|
||
|
|
lastCalled = now;
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
else if (!timeoutId) {
|
||
|
|
timeoutId = setTimeout(trailingCall, remain);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that passes `value` to the `wrapper` function as its
|
||
|
|
* first argument. Additional arguments passed to the new function are appended
|
||
|
|
* to those passed to the `wrapper` function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Mixed} value The value to wrap.
|
||
|
|
* @param {Function} wrapper The wrapper function.
|
||
|
|
* @returns {Function} Returns the new function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var hello = function(name) { return 'hello: ' + name; };
|
||
|
|
* hello = _.wrap(hello, function(func) {
|
||
|
|
* return 'before, ' + func('moe') + ', after';
|
||
|
|
* });
|
||
|
|
* hello();
|
||
|
|
* // => 'before, hello: moe, after'
|
||
|
|
*/
|
||
|
|
function wrap(value, wrapper) {
|
||
|
|
return function() {
|
||
|
|
var args = [value];
|
||
|
|
if (arguments.length) {
|
||
|
|
push.apply(args, arguments);
|
||
|
|
}
|
||
|
|
return wrapper.apply(this, args);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
|
||
|
|
* corresponding HTML entities.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} string The string to escape.
|
||
|
|
* @returns {String} Returns the escaped string.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.escape('Moe, Larry & Curly');
|
||
|
|
* // => "Moe, Larry & Curly"
|
||
|
|
*/
|
||
|
|
function escape(string) {
|
||
|
|
return string == null ? '' : (string + '').replace(reUnescapedHtml, escapeHtmlChar);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function returns the first argument passed to it.
|
||
|
|
*
|
||
|
|
* Note: It is used throughout Lo-Dash as a default callback.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Mixed} value Any value.
|
||
|
|
* @returns {Mixed} Returns `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var moe = { 'name': 'moe' };
|
||
|
|
* moe === _.identity(moe);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function identity(value) {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds functions properties of `object` to the `lodash` function and chainable
|
||
|
|
* wrapper.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Object} object The object of function properties to add to `lodash`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.mixin({
|
||
|
|
* 'capitalize': function(string) {
|
||
|
|
* return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
|
||
|
|
* }
|
||
|
|
* });
|
||
|
|
*
|
||
|
|
* _.capitalize('larry');
|
||
|
|
* // => 'Larry'
|
||
|
|
*
|
||
|
|
* _('curly').capitalize();
|
||
|
|
* // => 'Curly'
|
||
|
|
*/
|
||
|
|
function mixin(object) {
|
||
|
|
forEach(functions(object), function(methodName) {
|
||
|
|
var func = lodash[methodName] = object[methodName];
|
||
|
|
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
var args = [this.__wrapped__];
|
||
|
|
if (arguments.length) {
|
||
|
|
push.apply(args, arguments);
|
||
|
|
}
|
||
|
|
var result = func.apply(lodash, args);
|
||
|
|
if (this.__chain__) {
|
||
|
|
result = new lodash(result);
|
||
|
|
result.__chain__ = true;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reverts the '_' variable to its previous value and returns a reference to
|
||
|
|
* the `lodash` function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @returns {Function} Returns the `lodash` function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var lodash = _.noConflict();
|
||
|
|
*/
|
||
|
|
function noConflict() {
|
||
|
|
window._ = oldDash;
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Produces a random number between `min` and `max` (inclusive). If only one
|
||
|
|
* argument is passed, a number between `0` and the given number will be returned.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Number} [min=0] The minimum possible value.
|
||
|
|
* @param {Number} [max=1] The maximum possible value.
|
||
|
|
* @returns {Number} Returns a random number.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.random(0, 5);
|
||
|
|
* // => a number between 1 and 5
|
||
|
|
*
|
||
|
|
* _.random(5);
|
||
|
|
* // => also a number between 1 and 5
|
||
|
|
*/
|
||
|
|
function random(min, max) {
|
||
|
|
if (min == null && max == null) {
|
||
|
|
max = 1;
|
||
|
|
}
|
||
|
|
min = +min || 0;
|
||
|
|
if (max == null) {
|
||
|
|
max = min;
|
||
|
|
min = 0;
|
||
|
|
}
|
||
|
|
return min + nativeFloor(nativeRandom() * ((+max || 0) - min + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resolves the value of `property` on `object`. If `property` is a function
|
||
|
|
* it will be invoked and its result returned, else the property value is
|
||
|
|
* returned. If `object` is falsey, then `null` is returned.
|
||
|
|
*
|
||
|
|
* @deprecated
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @param {String} property The property to get the value of.
|
||
|
|
* @returns {Mixed} Returns the resolved value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var object = {
|
||
|
|
* 'cheese': 'crumpets',
|
||
|
|
* 'stuff': function() {
|
||
|
|
* return 'nonsense';
|
||
|
|
* }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.result(object, 'cheese');
|
||
|
|
* // => 'crumpets'
|
||
|
|
*
|
||
|
|
* _.result(object, 'stuff');
|
||
|
|
* // => 'nonsense'
|
||
|
|
*/
|
||
|
|
function result(object, property) {
|
||
|
|
// based on Backbone's private `getValue` function
|
||
|
|
// https://github.com/documentcloud/backbone/blob/0.9.2/backbone.js#L1419-1424
|
||
|
|
var value = object ? object[property] : null;
|
||
|
|
return isFunction(value) ? object[property]() : value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A micro-templating method that handles arbitrary delimiters, preserves
|
||
|
|
* whitespace, and correctly escapes quotes within interpolated code.
|
||
|
|
*
|
||
|
|
* Note: In the development build `_.template` utilizes sourceURLs for easier
|
||
|
|
* debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
|
||
|
|
*
|
||
|
|
* Note: Lo-Dash may be used in Chrome extensions by either creating a `lodash csp`
|
||
|
|
* build and avoiding `_.template` use, or loading Lo-Dash in a sandboxed page.
|
||
|
|
* See http://developer.chrome.com/trunk/extensions/sandboxingEval.html
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} text The template text.
|
||
|
|
* @param {Obect} data The data object used to populate the text.
|
||
|
|
* @param {Object} options The options object.
|
||
|
|
* @returns {Function|String} Returns a compiled function when no `data` object
|
||
|
|
* is given, else it returns the interpolated text.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* // using a compiled template
|
||
|
|
* var compiled = _.template('hello: <%= name %>');
|
||
|
|
* compiled({ 'name': 'moe' });
|
||
|
|
* // => 'hello: moe'
|
||
|
|
*
|
||
|
|
* var list = '<% _.forEach(people, function(name) { %><li><%= name %></li><% }); %>';
|
||
|
|
* _.template(list, { 'people': ['moe', 'larry', 'curly'] });
|
||
|
|
* // => '<li>moe</li><li>larry</li><li>curly</li>'
|
||
|
|
*
|
||
|
|
* // using the "escape" delimiter to escape HTML in data property values
|
||
|
|
* _.template('<b><%- value %></b>', { 'value': '<script>' });
|
||
|
|
* // => '<b><script></b>'
|
||
|
|
*
|
||
|
|
* // using the internal `print` function in "evaluate" delimiters
|
||
|
|
* _.template('<% print("Hello " + epithet); %>.', { 'epithet': 'stooge' });
|
||
|
|
* // => 'Hello stooge.'
|
||
|
|
*
|
||
|
|
* // using custom template delimiter settings
|
||
|
|
* _.templateSettings = {
|
||
|
|
* 'interpolate': /\{\{([\s\S]+?)\}\}/g
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.template('Hello {{ name }}!', { 'name': 'Mustache' });
|
||
|
|
* // => 'Hello Mustache!'
|
||
|
|
*
|
||
|
|
* // using the `variable` option to ensure a with-statement isn't used in the compiled template
|
||
|
|
* var compiled = _.template('hello: <%= data.name %>', null, { 'variable': 'data' });
|
||
|
|
* compiled.source;
|
||
|
|
* // => function(data) {
|
||
|
|
* var __t, __p = '', __e = _.escape;
|
||
|
|
* __p += 'hello: ' + ((__t = ( data.name )) == 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(text, data, options) {
|
||
|
|
// 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
|
||
|
|
text += '';
|
||
|
|
options || (options = {});
|
||
|
|
|
||
|
|
var isEvaluating,
|
||
|
|
result,
|
||
|
|
index = 0,
|
||
|
|
settings = lodash.templateSettings,
|
||
|
|
source = "__p += '",
|
||
|
|
variable = options.variable || settings.variable,
|
||
|
|
hasVariable = variable;
|
||
|
|
|
||
|
|
// compile regexp to match each delimiter
|
||
|
|
var reDelimiters = RegExp(
|
||
|
|
(options.escape || settings.escape || reNoMatch).source + '|' +
|
||
|
|
(options.interpolate || settings.interpolate || reNoMatch).source + '|' +
|
||
|
|
(options.evaluate || settings.evaluate || reNoMatch).source + '|$'
|
||
|
|
, 'g');
|
||
|
|
|
||
|
|
text.replace(reDelimiters, function(match, escapeValue, interpolateValue, evaluateValue, offset) {
|
||
|
|
// escape characters that cannot be included in string literals
|
||
|
|
source += text.slice(index, offset).replace(reUnescapedString, escapeStringChar);
|
||
|
|
|
||
|
|
// replace delimiters with snippets
|
||
|
|
source +=
|
||
|
|
escapeValue ? "' +\n__e(" + escapeValue + ") +\n'" :
|
||
|
|
evaluateValue ? "';\n" + evaluateValue + ";\n__p += '" :
|
||
|
|
interpolateValue ? "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'" : '';
|
||
|
|
|
||
|
|
isEvaluating || (isEvaluating = evaluateValue || reComplexDelimiter.test(escapeValue || interpolateValue));
|
||
|
|
index = offset + match.length;
|
||
|
|
});
|
||
|
|
|
||
|
|
source += "';\n";
|
||
|
|
|
||
|
|
// if `variable` is not specified and the template contains "evaluate"
|
||
|
|
// delimiters, wrap a with-statement around the generated code to add the
|
||
|
|
// data object to the top of the scope chain
|
||
|
|
if (!hasVariable) {
|
||
|
|
variable = 'obj';
|
||
|
|
if (isEvaluating) {
|
||
|
|
source = 'with (' + variable + ') {\n' + source + '\n}\n';
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// avoid a with-statement by prepending data object references to property names
|
||
|
|
var reDoubleVariable = RegExp('(\\(\\s*)' + variable + '\\.' + variable + '\\b', 'g');
|
||
|
|
source = source
|
||
|
|
.replace(reInsertVariable, '$&' + variable + '.')
|
||
|
|
.replace(reDoubleVariable, '$1__d');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// 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 + ') {\n' +
|
||
|
|
(hasVariable ? '' : variable + ' || (' + variable + ' = {});\n') +
|
||
|
|
'var __t, __p = \'\', __e = _.escape' +
|
||
|
|
(isEvaluating
|
||
|
|
? ', __j = Array.prototype.join;\n' +
|
||
|
|
'function print() { __p += __j.call(arguments, \'\') }\n'
|
||
|
|
: (hasVariable ? '' : ', __d = ' + variable + '.' + variable + ' || ' + variable) + ';\n'
|
||
|
|
) +
|
||
|
|
source +
|
||
|
|
'return __p\n}';
|
||
|
|
|
||
|
|
// use a sourceURL for easier debugging
|
||
|
|
// http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
|
||
|
|
var sourceURL = useSourceURL
|
||
|
|
? '\n//@ sourceURL=/lodash/template/source[' + (templateCounter++) + ']'
|
||
|
|
: '';
|
||
|
|
|
||
|
|
try {
|
||
|
|
result = Function('_', 'return ' + source + sourceURL)(lodash);
|
||
|
|
} catch(e) {
|
||
|
|
e.source = source;
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (data) {
|
||
|
|
return result(data);
|
||
|
|
}
|
||
|
|
// provide the compiled function's source via its `toString` method, in
|
||
|
|
// supported environments, or the `source` property as a convenience for
|
||
|
|
// inlining compiled templates during the build process
|
||
|
|
result.source = source;
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Executes the `callback` function `n` times, returning an array of the results
|
||
|
|
* of each `callback` execution. The `callback` is bound to `thisArg` and invoked
|
||
|
|
* with one argument; (index).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Number} n The number of times to execute the callback.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of the results of each `callback` execution.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var diceRolls = _.times(3, _.partial(_.random, 1, 6));
|
||
|
|
* // => [3, 6, 4]
|
||
|
|
*
|
||
|
|
* _.times(3, function(n) { mage.castSpell(n); });
|
||
|
|
* // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
|
||
|
|
*
|
||
|
|
* _.times(3, function(n) { this.cast(n); }, mage);
|
||
|
|
* // => also calls `mage.castSpell(n)` three times
|
||
|
|
*/
|
||
|
|
function times(n, callback, thisArg) {
|
||
|
|
n = +n || 0;
|
||
|
|
var index = -1,
|
||
|
|
result = Array(n);
|
||
|
|
|
||
|
|
while (++index < n) {
|
||
|
|
result[index] = callback.call(thisArg, index);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts the HTML entities `&`, `<`, `>`, `"`, and `'`
|
||
|
|
* in `string` to their corresponding characters.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} string The string to unescape.
|
||
|
|
* @returns {String} Returns the unescaped string.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.unescape('Moe, Larry & Curly');
|
||
|
|
* // => "Moe, Larry & Curly"
|
||
|
|
*/
|
||
|
|
function unescape(string) {
|
||
|
|
return string == null ? '' : (string + '').replace(reEscapedHtml, unescapeHtmlChar);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates a unique id. If `prefix` is passed, the id will be appended to it.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} [prefix] The value to prefix the id with.
|
||
|
|
* @returns {Number|String} Returns a numeric id if no prefix is passed, else
|
||
|
|
* a string id may be returned.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.uniqueId('contact_');
|
||
|
|
* // => 'contact_104'
|
||
|
|
*/
|
||
|
|
function uniqueId(prefix) {
|
||
|
|
var id = idCounter++;
|
||
|
|
return prefix ? prefix + id : id;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Wraps the value in a `lodash` wrapper object.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Chaining
|
||
|
|
* @param {Mixed} value The value to wrap.
|
||
|
|
* @returns {Object} Returns the wrapper object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 },
|
||
|
|
* { 'name': 'curly', 'age': 60 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* var youngest = _.chain(stooges)
|
||
|
|
* .sortBy(function(stooge) { return stooge.age; })
|
||
|
|
* .map(function(stooge) { return stooge.name + ' is ' + stooge.age; })
|
||
|
|
* .first()
|
||
|
|
* .value();
|
||
|
|
* // => 'moe is 40'
|
||
|
|
*/
|
||
|
|
function chain(value) {
|
||
|
|
value = new lodash(value);
|
||
|
|
value.__chain__ = true;
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Invokes `interceptor` with the `value` as the first argument, and then
|
||
|
|
* returns `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 Chaining
|
||
|
|
* @param {Mixed} value The value to pass to `interceptor`.
|
||
|
|
* @param {Function} interceptor The function to invoke.
|
||
|
|
* @returns {Mixed} Returns `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.chain([1, 2, 3, 200])
|
||
|
|
* .filter(function(num) { return num % 2 == 0; })
|
||
|
|
* .tap(alert)
|
||
|
|
* .map(function(num) { return num * num })
|
||
|
|
* .value();
|
||
|
|
* // => // [2, 200] (alerted)
|
||
|
|
* // => [4, 40000]
|
||
|
|
*/
|
||
|
|
function tap(value, interceptor) {
|
||
|
|
interceptor(value);
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Enables method chaining on the wrapper object.
|
||
|
|
*
|
||
|
|
* @name chain
|
||
|
|
* @deprecated
|
||
|
|
* @memberOf _
|
||
|
|
* @category Chaining
|
||
|
|
* @returns {Mixed} Returns the wrapper object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3]).value();
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
function wrapperChain() {
|
||
|
|
this.__chain__ = true;
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Extracts the wrapped value.
|
||
|
|
*
|
||
|
|
* @name value
|
||
|
|
* @memberOf _
|
||
|
|
* @category Chaining
|
||
|
|
* @returns {Mixed} Returns the wrapped value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3]).value();
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
function wrapperValue() {
|
||
|
|
return this.__wrapped__;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The semantic version number.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @type String
|
||
|
|
*/
|
||
|
|
lodash.VERSION = '0.8.1';
|
||
|
|
|
||
|
|
// assign static methods
|
||
|
|
lodash.after = after;
|
||
|
|
lodash.bind = bind;
|
||
|
|
lodash.bindAll = bindAll;
|
||
|
|
lodash.chain = chain;
|
||
|
|
lodash.clone = clone;
|
||
|
|
lodash.compact = compact;
|
||
|
|
lodash.compose = compose;
|
||
|
|
lodash.contains = contains;
|
||
|
|
lodash.countBy = countBy;
|
||
|
|
lodash.debounce = debounce;
|
||
|
|
lodash.defaults = defaults;
|
||
|
|
lodash.defer = defer;
|
||
|
|
lodash.delay = delay;
|
||
|
|
lodash.difference = difference;
|
||
|
|
lodash.escape = escape;
|
||
|
|
lodash.every = every;
|
||
|
|
lodash.extend = extend;
|
||
|
|
lodash.filter = filter;
|
||
|
|
lodash.find = find;
|
||
|
|
lodash.first = first;
|
||
|
|
lodash.flatten = flatten;
|
||
|
|
lodash.forEach = forEach;
|
||
|
|
lodash.forIn = forIn;
|
||
|
|
lodash.forOwn = forOwn;
|
||
|
|
lodash.functions = functions;
|
||
|
|
lodash.groupBy = groupBy;
|
||
|
|
lodash.has = has;
|
||
|
|
lodash.identity = identity;
|
||
|
|
lodash.indexOf = indexOf;
|
||
|
|
lodash.initial = initial;
|
||
|
|
lodash.intersection = intersection;
|
||
|
|
lodash.invert = invert;
|
||
|
|
lodash.invoke = invoke;
|
||
|
|
lodash.isArguments = isArguments;
|
||
|
|
lodash.isArray = isArray;
|
||
|
|
lodash.isBoolean = isBoolean;
|
||
|
|
lodash.isDate = isDate;
|
||
|
|
lodash.isElement = isElement;
|
||
|
|
lodash.isEmpty = isEmpty;
|
||
|
|
lodash.isEqual = isEqual;
|
||
|
|
lodash.isFinite = isFinite;
|
||
|
|
lodash.isFunction = isFunction;
|
||
|
|
lodash.isNaN = isNaN;
|
||
|
|
lodash.isNull = isNull;
|
||
|
|
lodash.isNumber = isNumber;
|
||
|
|
lodash.isObject = isObject;
|
||
|
|
lodash.isPlainObject = isPlainObject;
|
||
|
|
lodash.isRegExp = isRegExp;
|
||
|
|
lodash.isString = isString;
|
||
|
|
lodash.isUndefined = isUndefined;
|
||
|
|
lodash.keys = keys;
|
||
|
|
lodash.last = last;
|
||
|
|
lodash.lastIndexOf = lastIndexOf;
|
||
|
|
lodash.lateBind = lateBind;
|
||
|
|
lodash.map = map;
|
||
|
|
lodash.max = max;
|
||
|
|
lodash.memoize = memoize;
|
||
|
|
lodash.merge = merge;
|
||
|
|
lodash.min = min;
|
||
|
|
lodash.mixin = mixin;
|
||
|
|
lodash.noConflict = noConflict;
|
||
|
|
lodash.object = object;
|
||
|
|
lodash.omit = omit;
|
||
|
|
lodash.once = once;
|
||
|
|
lodash.pairs = pairs;
|
||
|
|
lodash.partial = partial;
|
||
|
|
lodash.pick = pick;
|
||
|
|
lodash.pluck = pluck;
|
||
|
|
lodash.random = random;
|
||
|
|
lodash.range = range;
|
||
|
|
lodash.reduce = reduce;
|
||
|
|
lodash.reduceRight = reduceRight;
|
||
|
|
lodash.reject = reject;
|
||
|
|
lodash.rest = rest;
|
||
|
|
lodash.result = result;
|
||
|
|
lodash.shuffle = shuffle;
|
||
|
|
lodash.size = size;
|
||
|
|
lodash.some = some;
|
||
|
|
lodash.sortBy = sortBy;
|
||
|
|
lodash.sortedIndex = sortedIndex;
|
||
|
|
lodash.tap = tap;
|
||
|
|
lodash.template = template;
|
||
|
|
lodash.throttle = throttle;
|
||
|
|
lodash.times = times;
|
||
|
|
lodash.toArray = toArray;
|
||
|
|
lodash.unescape = unescape;
|
||
|
|
lodash.union = union;
|
||
|
|
lodash.uniq = uniq;
|
||
|
|
lodash.uniqueId = uniqueId;
|
||
|
|
lodash.values = values;
|
||
|
|
lodash.where = where;
|
||
|
|
lodash.without = without;
|
||
|
|
lodash.wrap = wrap;
|
||
|
|
lodash.zip = zip;
|
||
|
|
|
||
|
|
// assign aliases
|
||
|
|
lodash.all = every;
|
||
|
|
lodash.any = some;
|
||
|
|
lodash.collect = map;
|
||
|
|
lodash.detect = find;
|
||
|
|
lodash.drop = rest;
|
||
|
|
lodash.each = forEach;
|
||
|
|
lodash.foldl = reduce;
|
||
|
|
lodash.foldr = reduceRight;
|
||
|
|
lodash.head = first;
|
||
|
|
lodash.include = contains;
|
||
|
|
lodash.inject = reduce;
|
||
|
|
lodash.methods = functions;
|
||
|
|
lodash.select = filter;
|
||
|
|
lodash.tail = rest;
|
||
|
|
lodash.take = first;
|
||
|
|
lodash.unique = uniq;
|
||
|
|
|
||
|
|
// add pseudo private properties used and removed during the build process
|
||
|
|
lodash._iteratorTemplate = iteratorTemplate;
|
||
|
|
lodash._shimKeys = shimKeys;
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
// add all static functions to `lodash.prototype`
|
||
|
|
mixin(lodash);
|
||
|
|
|
||
|
|
// add `lodash.prototype.chain` after calling `mixin()` to avoid overwriting
|
||
|
|
// it with the wrapped `lodash.chain`
|
||
|
|
lodash.prototype.chain = wrapperChain;
|
||
|
|
lodash.prototype.value = wrapperValue;
|
||
|
|
|
||
|
|
// add all mutator Array functions to the wrapper.
|
||
|
|
forEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
|
||
|
|
var func = ArrayProto[methodName];
|
||
|
|
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
var value = this.__wrapped__;
|
||
|
|
func.apply(value, arguments);
|
||
|
|
|
||
|
|
// avoid array-like object bugs with `Array#shift` and `Array#splice` in
|
||
|
|
// Firefox < 10 and IE < 9
|
||
|
|
if (hasObjectSpliceBug && value.length === 0) {
|
||
|
|
delete value[0];
|
||
|
|
}
|
||
|
|
if (this.__chain__) {
|
||
|
|
value = new lodash(value);
|
||
|
|
value.__chain__ = true;
|
||
|
|
}
|
||
|
|
return value;
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
// add all accessor Array functions to the wrapper.
|
||
|
|
forEach(['concat', 'join', 'slice'], function(methodName) {
|
||
|
|
var func = ArrayProto[methodName];
|
||
|
|
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
var value = this.__wrapped__,
|
||
|
|
result = func.apply(value, arguments);
|
||
|
|
|
||
|
|
if (this.__chain__) {
|
||
|
|
result = new lodash(result);
|
||
|
|
result.__chain__ = true;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
// expose Lo-Dash
|
||
|
|
// some AMD build optimizers, like r.js, check for specific condition patterns like the following:
|
||
|
|
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
|
||
|
|
// Expose Lo-Dash to the global object even when an AMD loader is present in
|
||
|
|
// case Lo-Dash was injected by a third-party script and not intended to be
|
||
|
|
// loaded as a module. The global assignment can be reverted in the Lo-Dash
|
||
|
|
// module via its `noConflict()` method.
|
||
|
|
window._ = lodash;
|
||
|
|
|
||
|
|
// define as an anonymous module so, through path mapping, it can be
|
||
|
|
// referenced as the "underscore" module
|
||
|
|
define(function() {
|
||
|
|
return lodash;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
// check for `exports` after `define` in case a build optimizer adds an `exports` object
|
||
|
|
else if (freeExports) {
|
||
|
|
// in Node.js or RingoJS v0.8.0+
|
||
|
|
if (typeof module == 'object' && module && module.exports == freeExports) {
|
||
|
|
(module.exports = lodash)._ = lodash;
|
||
|
|
}
|
||
|
|
// in Narwhal or RingoJS v0.7.0-
|
||
|
|
else {
|
||
|
|
freeExports._ = lodash;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// in a browser or Rhino
|
||
|
|
window._ = lodash;
|
||
|
|
}
|
||
|
|
}(this));
|