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lodash.js
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lodash.js
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/**
* @license
* Lo-Dash 3.0.0-pre <http://lodash.com/>
* Copyright 2012-2014 The Dojo Foundation <http://dojofoundation.org/>
* Based on Underscore.js 1.6.0 <http://underscorejs.org/LICENSE>
* Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
* Available under MIT license <http://lodash.com/license>
*/
;(function() {
/** Used as a safe reference for `undefined` in pre ES5 environments */
var undefined;
/** Used as the semantic version number */
var VERSION = '3.0.0-pre';
/** Used to compose bitmasks for wrapper metadata */
var BIND_FLAG = 1,
BIND_KEY_FLAG = 2,
CURRY_FLAG = 4,
CURRY_RIGHT_FLAG = 8,
CURRY_BOUND_FLAG = 16,
PARTIAL_FLAG = 32,
PARTIAL_RIGHT_FLAG = 64;
/** Used to detect when a function becomes hot */
var HOT_COUNT = 150,
HOT_SPAN = 16;
/** Used as the property name for wrapper metadata */
var EXPANDO = '__lodash_' + VERSION.replace(/[-.]/g, '_') + '__';
/** Used as the TypeError message for "Functions" methods */
var FUNC_ERROR_TEXT = 'Expected a function';
/** Used as a reference for the max length of an array */
var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1;
/**
* Used as the maximum length of an array-like value.
* See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
* for more details.
*/
var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
/** Used as the internal argument placeholder */
var PLACEHOLDER = '__lodash_placeholder__';
/** Used to generate unique IDs */
var idCounter = 0;
/** Used to detect words composed of all capital letters */
var reAllCaps = /^[A-Z]+$/;
/** Used to match empty string literals in compiled template source */
var reEmptyStringLeading = /\b__p \+= '';/g,
reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
/** Used to match HTML entities and HTML characters */
var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g,
reUnescapedHtml = /[&<>"'`]/g;
/** Used to match template delimiters */
var reEscape = /<%-([\s\S]+?)%>/g,
reEvaluate = /<%([\s\S]+?)%>/g,
reInterpolate = /<%=([\s\S]+?)%>/g;
/**
* Used to match ES6 template delimiters.
* See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-template-literal-lexical-components)
* for more details.
*/
var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
/** Used to match `RegExp` flags from their coerced string values */
var reFlags = /\w*$/;
/** Used to detect named functions */
var reFuncName = /^\s*function[ \n\r\t]+\w/;
/** Used to detect hexadecimal string values */
var reHexPrefix = /^0[xX]/;
/** Used to detect host constructors (Safari > 5) */
var reHostCtor = /^\[object .+?Constructor\]$/;
/** Used to match latin-1 supplement letters */
var reLatin1 = /[\xC0-\xFF]/g;
/** Used to ensure capturing order of template delimiters */
var reNoMatch = /($^)/;
/**
* Used to match `RegExp` special characters.
* See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
* for more details.
*/
var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g;
/** Used to detect functions containing a `this` reference */
var reThis = /\bthis\b/;
/** Used to match unescaped characters in compiled string literals */
var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
/** Used to match words to create compound words */
var reWords = /[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g;
/** Used to detect and test whitespace */
var whitespace = (
// whitespace
' \t\x0B\f\xA0\ufeff' +
// line terminators
'\n\r\u2028\u2029' +
// unicode category "Zs" space separators
'\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000'
);
/** Used to assign default `context` object properties */
var contextProps = [
'Array', 'ArrayBuffer', 'Date', 'Error', 'Float32Array', 'Float64Array',
'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Math', 'Number',
'Object', 'RegExp', 'Set', 'String', '_', 'clearTimeout', 'document',
'isFinite', 'parseInt', 'setTimeout', 'TypeError', 'Uint8Array',
'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
'window', 'WinRTError'
];
/** Used to fix the JScript `[[DontEnum]]` bug */
var shadowedProps = [
'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
'toLocaleString', 'toString', 'valueOf'
];
/** Used to make template sourceURLs easier to identify */
var templateCounter = -1;
/** `Object#toString` result references */
var argsClass = '[object Arguments]',
arrayClass = '[object Array]',
boolClass = '[object Boolean]',
dateClass = '[object Date]',
errorClass = '[object Error]',
funcClass = '[object Function]',
mapClass = '[object Map]',
numberClass = '[object Number]',
objectClass = '[object Object]',
regexpClass = '[object RegExp]',
setClass = '[object Set]',
stringClass = '[object String]',
weakMapClass = '[object WeakMap]';
var arrayBufferClass = '[object ArrayBuffer]',
float32Class = '[object Float32Array]',
float64Class = '[object Float64Array]',
int8Class = '[object Int8Array]',
int16Class = '[object Int16Array]',
int32Class = '[object Int32Array]',
uint8Class = '[object Uint8Array]',
uint8ClampedClass = '[object Uint8ClampedArray]',
uint16Class = '[object Uint16Array]',
uint32Class = '[object Uint32Array]';
/** Used to identify object classifications that are treated like arrays */
var arrayLikeClasses = {};
arrayLikeClasses[argsClass] =
arrayLikeClasses[arrayClass] = arrayLikeClasses[float32Class] =
arrayLikeClasses[float64Class] = arrayLikeClasses[int8Class] =
arrayLikeClasses[int16Class] = arrayLikeClasses[int32Class] =
arrayLikeClasses[uint8Class] = arrayLikeClasses[uint8ClampedClass] =
arrayLikeClasses[uint16Class] = arrayLikeClasses[uint32Class] = true;
arrayLikeClasses[arrayBufferClass] = arrayLikeClasses[boolClass] =
arrayLikeClasses[dateClass] = arrayLikeClasses[errorClass] =
arrayLikeClasses[funcClass] = arrayLikeClasses[mapClass] =
arrayLikeClasses[numberClass] = arrayLikeClasses[objectClass] =
arrayLikeClasses[regexpClass] = arrayLikeClasses[setClass] =
arrayLikeClasses[stringClass] = arrayLikeClasses[weakMapClass] = false;
/** Used to identify object classifications that `_.clone` supports */
var cloneableClasses = {};
cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
cloneableClasses[arrayBufferClass] = cloneableClasses[boolClass] =
cloneableClasses[dateClass] = cloneableClasses[float32Class] =
cloneableClasses[float64Class] = cloneableClasses[int8Class] =
cloneableClasses[int16Class] = cloneableClasses[int32Class] =
cloneableClasses[numberClass] = cloneableClasses[objectClass] =
cloneableClasses[regexpClass] = cloneableClasses[stringClass] =
cloneableClasses[uint8Class] = cloneableClasses[uint8ClampedClass] =
cloneableClasses[uint16Class] = cloneableClasses[uint32Class] = true;
cloneableClasses[errorClass] =
cloneableClasses[funcClass] = cloneableClasses[mapClass] =
cloneableClasses[setClass] = cloneableClasses[weakMapClass] = false;
/** Used as an internal `_.debounce` options object by `_.throttle` */
var debounceOptions = {
'leading': false,
'maxWait': 0,
'trailing': false
};
/** Used as the property descriptor for wrapper metadata */
var descriptor = {
'configurable': false,
'enumerable': false,
'value': null,
'writable': false
};
/**
* Used to convert characters to HTML entities.
*
* **Note:** Though the ">" character is escaped for symmetry, characters like
* ">" and "/" don't require escaping in HTML and have no special meaning
* unless they're part of a tag or unquoted attribute value.
* See [Mathias Bynens's article](http://mathiasbynens.be/notes/ambiguous-ampersands)
* (under "semi-related fun fact") for more details.
*
* Backticks are escaped because in Internet Explorer < 9, they can break out
* of attribute values or HTML comments. See [#102](http://html5sec.org/#102),
* [#108](http://html5sec.org/#108), and [#133](http://html5sec.org/#133) of
* the [HTML5 Security Cheatsheet](http://html5sec.org/) for more details.
*/
var htmlEscapes = {
'&': '&',
'<': '<',
'>': '>',
'"': '"',
"'": ''',
'`': '`'
};
/** Used to convert HTML entities to characters */
var htmlUnescapes = {
'&': '&',
'<': '<',
'>': '>',
'"': '"',
''': "'",
'`': '`'
};
/**
* Used to convert latin-1 supplement letters to basic latin (ASCII) letters.
* See [Wikipedia](http://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
* for more details.
*/
var deburredLetters = {
'\xC0': 'A', '\xC1': 'A', '\xC2': 'A', '\xC3': 'A', '\xC4': 'A', '\xC5': 'A',
'\xE0': 'a', '\xE1': 'a', '\xE2': 'a', '\xE3': 'a', '\xE4': 'a', '\xE5': 'a',
'\xC7': 'C', '\xE7': 'c',
'\xD0': 'D', '\xF0': 'd',
'\xC8': 'E', '\xC9': 'E', '\xCA': 'E', '\xCB': 'E',
'\xE8': 'e', '\xE9': 'e', '\xEA': 'e', '\xEB': 'e',
'\xCC': 'I', '\xCD': 'I', '\xCE': 'I', '\xCF': 'I',
'\xEC': 'i', '\xED': 'i', '\xEE': 'i', '\xEF': 'i',
'\xD1': 'N', '\xF1': 'n',
'\xD2': 'O', '\xD3': 'O', '\xD4': 'O', '\xD5': 'O', '\xD6': 'O', '\xD8': 'O',
'\xF2': 'o', '\xF3': 'o', '\xF4': 'o', '\xF5': 'o', '\xF6': 'o', '\xF8': 'o',
'\xD9': 'U', '\xDA': 'U', '\xDB': 'U', '\xDC': 'U',
'\xF9': 'u', '\xFA': 'u', '\xFB': 'u', '\xFC': 'u',
'\xDD': 'Y', '\xFD': 'y', '\xFF': 'y',
'\xC6': 'AE', '\xE6': 'ae',
'\xDE': 'Th', '\xFE': 'th',
'\xDF': 'ss', '\xD7': ' ', '\xF7': ' '
};
/** Used to determine if values are of the language type `Object` */
var objectTypes = {
'function': true,
'object': true
};
/** Used to escape characters for inclusion in compiled string literals */
var stringEscapes = {
'\\': '\\',
"'": "'",
'\n': 'n',
'\r': 'r',
'\u2028': 'u2028',
'\u2029': 'u2029'
};
/** Used as a reference to the global object */
var root = (objectTypes[typeof window] && window) || this;
/** Detect free variable `exports` */
var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
/** Detect free variable `module` */
var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
/** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
var freeGlobal = freeExports && freeModule && typeof global == 'object' && global;
if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {
root = freeGlobal;
}
/** Detect the popular CommonJS extension `module.exports` */
var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
/*--------------------------------------------------------------------------*/
/**
* The base implementation of `_.at` without support for strings and individual
* key arguments.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {number[]|string[]} [props] The property names or indexes of elements to pick.
* @returns {Array} Returns the new array of picked elements.
*/
function baseAt(collection, props) {
var index = -1,
length = props.length,
result = Array(length);
while(++index < length) {
result[index] = collection[props[index]];
}
return result;
}
/**
* The base implementation of `compareAscending` which compares values and
* sorts them in ascending order without guaranteeing a stable sort.
*
* @private
* @param {*} value The value to compare to `other`.
* @param {*} other The value to compare to `value`.
* @returns {number} Returns the sort order indicator for `value`.
*/
function baseCompareAscending(value, other) {
if (value !== other) {
if (value > other || typeof value == 'undefined') {
return 1;
}
if (value < other || typeof other == 'undefined') {
return -1;
}
}
return 0;
}
/**
* The base implementation of `_.indexOf` without support for binary searches.
*
* @private
* @param {Array} array The array to search.
* @param {*} value The value to search for.
* @param {number} [fromIndex=0] The index to search from.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function baseIndexOf(array, value, fromIndex) {
var index = (fromIndex || 0) - 1,
length = array ? array.length : 0,
isReflexive = value === value;
while (++index < length) {
var other = array[index];
if ((isReflexive ? other === value : other !== other)) {
return index;
}
}
return -1;
}
/**
* The base implementation of `_.slice` without support for `start` and `end`
* arguments.
*
* @private
* @param {Array} array The array to slice.
* @returns {Array} Returns the slice of `array`.
*/
function baseSlice(array) {
var index = -1,
length = array ? array.length : 0,
result = Array(length);
while (++index < length) {
result[index] = array[index];
}
return result;
}
/**
* An implementation of `_.contains` for cache objects that mimics the return
* signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
*
* @private
* @param {Object} cache The cache object to inspect.
* @param {*} value The value to search for.
* @returns {number} Returns `0` if `value` is found, else `-1`.
*/
function cacheIndexOf(cache, value) {
return cache.has(value) ? 0 : -1;
}
/**
* Used by `_.max` and `_.min` as the default callback when a given collection
* is a string value.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the code unit of the first character of the string.
*/
function charAtCallback(string) {
return string.charCodeAt(0);
}
/**
* Used by `_.trim` and `_.trimLeft` to get the index of the first character
* of `string` that is not found in `chars`.
*
* @private
* @param {string} string The string to inspect.
* @param {string} chars The characters to find.
* @returns {number} Returns the index of the first character not found in `chars`.
*/
function charsLeftIndex(string, chars) {
var index = -1,
length = string.length;
while (++index < length && chars.indexOf(string.charAt(index)) > -1) {}
return index;
}
/**
* Used by `_.trim` and `_.trimRight` to get the index of the last character
* of `string` that is not found in `chars`.
*
* @private
* @param {string} string The string to inspect.
* @param {string} chars The characters to find.
* @returns {number} Returns the index of the last character not found in `chars`.
*/
function charsRightIndex(string, chars) {
var index = string.length;
while (index-- && chars.indexOf(string.charAt(index)) > -1) {}
return index;
}
/**
* Used by `_.sortBy` to compare transformed elements of `collection` and stable
* sort them in ascending order.
*
* @private
* @param {Object} object The object to compare to `other`.
* @param {Object} other The object to compare to `object`.
* @returns {number} Returns the sort order indicator for `object`.
*/
function compareAscending(object, other) {
return baseCompareAscending(object.criteria, other.criteria) || (object.index - other.index);
}
/**
* Used by `_.sortBy` to compare multiple properties of each element in a
* collection and stable sort them in ascending order.
*
* @private
* @param {Object} object The object to compare to `other`.
* @param {Object} other The object to compare to `object`.
* @returns {number} Returns the sort order indicator for `object`.
*/
function compareMultipleAscending(object, other) {
var index = -1,
objCriteria = object.criteria,
othCriteria = other.criteria,
length = objCriteria.length;
while (++index < length) {
var result = baseCompareAscending(objCriteria[index], othCriteria[index]);
if (result) {
return result;
}
}
// Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
// that causes it, under certain circumstances, to provide the same value
// for `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
//
// This also ensures a stable sort in V8 and other engines.
// See https://code.google.com/p/v8/issues/detail?id=90
return object.index - other.index;
}
/**
* Creates a function that produces compound words out of the words in a
* given string.
*
* @private
* @param {Function} callback The function invoked to combine each word.
* @returns {Function} Returns the new compounder function.
*/
function createCompounder(callback) {
return function(string) {
var index = -1,
words = string != null && String(string).replace(reLatin1, deburrLetter).match(reWords),
length = words ? words.length : 0,
result = '';
while (++index < length) {
result = callback(result, words[index], index, words);
}
return result;
};
}
/**
* Used by `createCompounder` to convert latin-1 supplement letters to basic
* latin (ASCII) letters.
*
* @private
* @param {string} letter The matched letter to deburr.
* @returns {string} Returns the deburred letter.
*/
function deburrLetter(letter) {
return deburredLetters[letter];
}
/**
* Used by `_.escape` to convert characters to HTML entities.
*
* @private
* @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character.
*/
function escapeHtmlChar(chr) {
return htmlEscapes[chr];
}
/**
* Used by `_.template` to escape characters for inclusion in compiled
* string literals.
*
* @private
* @param {string} chr The matched character to escape.
* @returns {string} Returns the escaped character.
*/
function escapeStringChar(chr) {
return '\\' + stringEscapes[chr];
}
/**
* Checks if `value` is a host object in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a host object, else `false`.
*/
var isHostObject = (function() {
try {
({ 'toString': 0 } + '');
} catch(e) {
return function() { return false; };
}
return function(value) {
// IE < 9 presents many host objects as `Object` objects that can coerce to
// strings despite having improperly defined `toString` methods
return typeof value.toString != 'function' && typeof (value + '') == 'string';
};
}());
/**
* Used by `_.trimmedLeftIndex` and `_.trimmedRightIndex` to determine if a
* character code is whitespace.
*
* @private
* @param {number} charCode The character code to inspect.
* @returns {boolean} Returns `true` if `charCode` is whitespace, else `false`.
*/
function isWhitespace(charCode) {
return ((charCode <= 160 && (charCode >= 9 && charCode <= 13) || charCode == 32 || charCode == 160) || charCode == 5760 || charCode == 6158 ||
(charCode >= 8192 && (charCode <= 8202 || charCode == 8232 || charCode == 8233 || charCode == 8239 || charCode == 8287 || charCode == 12288 || charCode == 65279)));
}
/**
* Used by `_.trim` and `_.trimLeft` to get the index of the first non-whitespace
* character of `string`.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the index of the first non-whitespace character.
*/
function trimmedLeftIndex(string) {
var index = -1,
length = string.length;
while (++index < length && isWhitespace(string.charCodeAt(index))) {}
return index;
}
/**
* Used by `_.trim` and `_.trimRight` to get the index of the last non-whitespace
* character of `string`.
*
* @private
* @param {string} string The string to inspect.
* @returns {number} Returns the index of the last non-whitespace character.
*/
function trimmedRightIndex(string) {
var index = string.length;
while (index-- && isWhitespace(string.charCodeAt(index))) {}
return index;
}
/**
* Used by `_.unescape` to convert HTML entities to characters.
*
* @private
* @param {string} chr The matched character to unescape.
* @returns {string} Returns the unescaped character.
*/
function unescapeHtmlChar(chr) {
return htmlUnescapes[chr];
}
/*--------------------------------------------------------------------------*/
/**
* Create a new pristine `lodash` function using the given `context` object.
*
* @static
* @memberOf _
* @category Utility
* @param {Object} [context=root] The context object.
* @returns {Function} Returns a new `lodash` function.
* @example
*
* _.mixin({ 'add': function(a, b) { return a + b; } }, false);
*
* var lodash = _.runInContext();
* lodash.mixin({ 'sub': function(a, b) { return a - b; } }, false);
*
* _.isFunction(_.add);
* // => true
*
* _.isFunction(_.sub);
* // => false
*
* lodash.isFunction(lodash.add);
* // => false
*
* lodash.isFunction(lodash.sub);
* // => true
*/
function runInContext(context) {
// Avoid issues with some ES3 environments that attempt to use values, named
// after built-in constructors like `Object`, for the creation of literals.
// ES5 clears this up by stating that literals must use built-in constructors.
// See http://es5.github.io/#x11.1.5.
context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;
/** Native constructor references */
var Array = context.Array,
Date = context.Date,
Error = context.Error,
Function = context.Function,
Math = context.Math,
Number = context.Number,
Object = context.Object,
RegExp = context.RegExp,
String = context.String,
TypeError = context.TypeError;
/** Used for native method references */
var arrayProto = Array.prototype,
errorProto = Error.prototype,
objectProto = Object.prototype,
stringProto = String.prototype;
/** Used to detect DOM support */
var document = (document = context.window) && document.document;
/** Used to resolve the decompiled source of functions */
var fnToString = Function.prototype.toString;
/** Used to check objects for own properties */
var hasOwnProperty = objectProto.hasOwnProperty;
/** Used to restore the original `_` reference in `_.noConflict` */
var oldDash = context._;
/** Used to resolve the internal `[[Class]]` of values */
var toString = objectProto.toString;
/** Used to detect if a method is native */
var reNative = RegExp('^' +
escapeRegExp(toString)
.replace(/toString|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);
/** Native method references */
var ArrayBuffer = isNative(ArrayBuffer = context.ArrayBuffer) && ArrayBuffer,
bufferSlice = isNative(bufferSlice = ArrayBuffer && new ArrayBuffer(0).slice) && bufferSlice,
ceil = Math.ceil,
clearTimeout = context.clearTimeout,
floor = Math.floor,
getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
push = arrayProto.push,
propertyIsEnumerable = objectProto.propertyIsEnumerable,
Set = isNative(Set = context.Set) && Set,
setTimeout = context.setTimeout,
splice = arrayProto.splice,
Uint8Array = isNative(Uint8Array = context.Uint8Array) && Uint8Array,
unshift = arrayProto.unshift,
WeakMap = isNative(WeakMap = context.WeakMap) && WeakMap;
/** Used to clone array buffers */
var Float64Array = (function() {
// Safari 5 errors when using an array buffer to initialize a typed array
// where the array buffer's `byteLength` is not a multiple of the typed
// array's `BYTES_PER_ELEMENT`
try {
var func = isNative(func = context.Float64Array) && func,
result = new func(new ArrayBuffer(10), 0, 1) && func;
} catch(e) {}
return result;
}());
/** Used to set metadata on functions */
var defineProperty = (function() {
// IE 8 only accepts DOM elements
try {
var o = {},
func = isNative(func = Object.defineProperty) && func,
result = func(o, o, o) && func;
} catch(e) {}
return result;
}());
/* Native method references for those with the same name as other `lodash` methods */
var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
nativeIsFinite = context.isFinite,
nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
nativeMax = Math.max,
nativeMin = Math.min,
nativeNow = isNative(nativeNow = Date.now) && nativeNow,
nativeNumIsFinite = isNative(nativeNumIsFinite = Number.isFinite) && nativeNumIsFinite,
nativeParseInt = context.parseInt,
nativeRandom = Math.random;
/** Used as the size, in bytes, of each Float64Array element */
var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0;
/** Used to store function metadata */
var metaMap = WeakMap && new WeakMap;
/** Used to lookup a built-in constructor by [[Class]] */
var ctorByClass = {};
ctorByClass[float32Class] = context.Float32Array;
ctorByClass[float64Class] = context.Float64Array;
ctorByClass[int8Class] = context.Int8Array;
ctorByClass[int16Class] = context.Int16Array;
ctorByClass[int32Class] = context.Int32Array;
ctorByClass[uint8Class] = context.Uint8Array;
ctorByClass[uint8ClampedClass] = context.Uint8ClampedArray;
ctorByClass[uint16Class] = context.Uint16Array;
ctorByClass[uint32Class] = context.Uint32Array;
/** Used to avoid iterating over non-enumerable properties in IE < 9 */
var nonEnumProps = {};
nonEnumProps[arrayClass] = nonEnumProps[dateClass] = nonEnumProps[numberClass] = { 'constructor': true, 'toLocaleString': true, 'toString': true, 'valueOf': true };
nonEnumProps[boolClass] = nonEnumProps[stringClass] = { 'constructor': true, 'toString': true, 'valueOf': true };
nonEnumProps[errorClass] = nonEnumProps[funcClass] = nonEnumProps[regexpClass] = { 'constructor': true, 'toString': true };
nonEnumProps[objectClass] = { 'constructor': true };
arrayEach(shadowedProps, function(key) {
for (var className in nonEnumProps) {
if (hasOwnProperty.call(nonEnumProps, className)) {
var props = nonEnumProps[className];
props[key] = hasOwnProperty.call(props, key);
}
}
});
/*--------------------------------------------------------------------------*/
/**
* Creates a `lodash` object which wraps the given value to enable intuitive
* method chaining.
*
* In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
* `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
* and `unshift`
*
* Chaining is supported in custom builds as long as the `value` method is
* implicitly or explicitly included in the build.
*
* The chainable wrapper functions are:
* `after`, `assign`, `at`, `before`, `bind`, `bindAll`, `bindKey`, `callback`,
* `chain`, `chunk`, `compact`, `concat`, `constant`, `countBy`, `create`,
* `curry`, `debounce`, `defaults`, `defer`, `delay`, `difference`, `drop`,
* `dropRight`, `dropRightWhile`, `dropWhile`, `filter`, `flatten`, `flattenDeep`,
* `flow`, `flowRight`, `forEach`, `forEachRight`, `forIn`, `forInRight`,
* `forOwn`, `forOwnRight`, `functions`, `groupBy`, `indexBy`, `initial`,
* `intersection`, `invert`, `invoke`, `keys`, `keysIn`, `map`, `mapValues`,
* `matches`, `memoize`, `merge`, `mixin`, `negate`, `noop`, `omit`, `once`,
* `pairs`, `partial`, `partialRight`, `partition`, `pick`, `pluck`, `property`,
* `pull`, `pullAt`, `push`, `range`, `reject`, `remove`, `rest`, `reverse`,
* `shuffle`, `slice`, `sort`, `sortBy`, `splice`, `take`, `takeRight`,
* `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `times`, `toArray`,
* `transform`, `union`, `uniq`, `unshift`, `unzip`, `values`, `valuesIn`,
* `where`, `without`, `wrap`, `xor`, `zip`, and `zipObject`
*
* The non-chainable wrapper functions are:
* `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `contains`,
* `endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`,
* `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `has`,
* `identity`, `indexOf`, `isArguments`, `isArray`, `isBoolean`, isDate`,
* `isElement`, `isEmpty`, `isEqual`, `isError`, `isFinite`, `isFunction`,
* `isNative`, `isNaN`, `isNull`, `isNumber`, `isObject`, `isPlainObject`,
* `isRegExp`, `isString`, `isUndefined`, `join`, `kebabCase`, `last`,
* `lastIndexOf`, `max`, `min`, `noConflict`, `now`, `pad`, `padLeft`,
* `padRight`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, `repeat`,
* `result`, `runInContext`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`,
* `sortedLastIndex`, `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`,
* `trunc`, `unescape`, `uniqueId`, and `value`
*
* The wrapper function `sample` will return a wrapped value when `n` is
* provided, otherwise it will return an unwrapped value.
*
* Explicit chaining can be enabled by using the `_.chain` method.
*
* @name _
* @constructor
* @category Chain
* @param {*} value The value to wrap in a `lodash` instance.
* @returns {Object} Returns a `lodash` instance.
* @example
*
* var wrapped = _([1, 2, 3]);
*
* // returns an unwrapped value
* wrapped.reduce(function(sum, n) { return sum + n; });
* // => 6
*
* // returns a wrapped value
* var squares = wrapped.map(function(n) { return n * n; });
*
* _.isArray(squares);
* // => false
*
* _.isArray(squares.value());
* // => true
*/
function lodash(value) {
if (value && typeof value == 'object') {
if (value instanceof lodashWrapper) {
return value;
}
if (!isArray(value) && hasOwnProperty.call(value, '__wrapped__')) {
value = value.__wrapped__;
}
}
return new lodashWrapper(value);
}
/**
* A fast path for creating `lodash` wrapper objects.
*
* @private
* @param {*} value The value to wrap in a `lodash` instance.
* @param {boolean} [chainAll=false] Enable chaining for all methods.
* @returns {Object} Returns a `lodash` instance.
*/
function lodashWrapper(value, chainAll) {
this.__chain__ = !!chainAll;
this.__wrapped__ = value;
}
/**
* An object environment feature flags.
*
* @static
* @memberOf _
* @type Object
*/
var support = lodash.support = {};
(function(x) {
var Ctor = function() { this.x = 1; },
object = { '0': 1, 'length': 1 },
props = [];
Ctor.prototype = { 'valueOf': 1, 'y': 1 };
for (var key in new Ctor) { props.push(key); }
/**
* Detect if the `[[Class]]` of `arguments` objects is resolvable
* (all but Firefox < 4, IE < 9).
*
* @memberOf _.support
* @type boolean
*/
support.argsClass = toString.call(arguments) == argsClass;
/**
* Detect if `name` or `message` properties of `Error.prototype` are
* enumerable by default (IE < 9, Safari < 5.1).
*
* @memberOf _.support
* @type boolean
*/
support.enumErrorProps = propertyIsEnumerable.call(errorProto, 'message') ||
propertyIsEnumerable.call(errorProto, 'name');
/**
* Detect if `prototype` properties are enumerable by default.
*
* 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 the `[[Enumerable]]` value of a function's `prototype`
* property to `true`.
*
* @memberOf _.support
* @type boolean
*/
support.enumPrototypes = propertyIsEnumerable.call(Ctor, 'prototype');
/**
* Detect if functions can be decompiled by `Function#toString`
* (all but Firefox OS certified apps, older Opera mobile browsers, and
* the PlayStation 3; forced `false` for Windows 8 apps).
*
* @memberOf _.support
* @type boolean
*/
support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext);
/**
* Detect if `Function#name` is supported (all but IE).
*
* @memberOf _.support
* @type boolean
*/
support.funcNames = typeof Function.name == 'string';
/**
* Detect if the `[[Class]]` of DOM nodes is resolvable (all but IE < 9).
*
* @memberOf _.support
* @type boolean
*/
support.nodeClass = toString.call(document) != objectClass;
/**
* Detect if string indexes are non-enumerable
* (IE < 9, RingoJS, Rhino, Narwhal).
*
* @memberOf _.support
* @type boolean
*/
support.nonEnumStrings = !propertyIsEnumerable.call('x', 0);
/**
* Detect if properties shadowing those on `Object.prototype` are
* non-enumerable.
*
* In IE < 9 an object's own properties, shadowing non-enumerable ones,
* are made non-enumerable as well (a.k.a the JScript `[[DontEnum]]` bug).
*
* @memberOf _.support
* @type boolean
*/
support.nonEnumShadows = !/valueOf/.test(props);
/**
* Detect if own properties are iterated after inherited properties
* (IE < 9).
*
* @memberOf _.support
* @type boolean
*/
support.ownLast = props[0] != 'x';
/**
* Detect if `Array#shift` and `Array#splice` augment array-like objects
* correctly.
*
* Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()`
* and `splice()` functions that fail to remove the last element, `value[0]`,
* of array-like objects even though the `length` property is set to `0`.
* The `shift()` method is buggy in IE 8 compatibility mode, while `splice()`
* is buggy regardless of mode in IE < 9 and buggy in compatibility mode
* in IE 9.
*
* @memberOf _.support
* @type boolean
*/
support.spliceObjects = (splice.call(object, 0, 1), !object[0]);
/**
* Detect lack of support for accessing string characters by index.
*