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fblundun/clones.js

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clones.js
/**
* @license
* Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/>
* Build: `lodash exports="node" include="isArray, isFunction, isString, isObject, isDate, isUndefined, isNull, map, filter, find, compact, isEmpty, clone, cloneDeep" --debug --output src/js/lib_managed/lodash.js`
* Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
* Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
* Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
* Available under MIT license <http://lodash.com/license>
*/
;(function() {
/** Used to pool arrays and objects used internally */
var arrayPool = [];
/** Used internally to indicate various things */
var indicatorObject = {};
/** Used as the max size of the `arrayPool` and `objectPool` */
var maxPoolSize = 40;
/** Used to match regexp flags from their coerced string values */
var reFlags = /\w*$/;
/** Used to detected named functions */
var reFuncName = /^\s*function[ \n\r\t]+\w/;
/** Used to detect functions containing a `this` reference */
var reThis = /\bthis\b/;
/** Used to fix the JScript [[DontEnum]] bug */
var shadowedProps = [
'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
'toLocaleString', 'toString', 'valueOf'
];
/** `Object#toString` result shortcuts */
var argsClass = '[object Arguments]',
arrayClass = '[object Array]',
boolClass = '[object Boolean]',
dateClass = '[object Date]',
errorClass = '[object Error]',
funcClass = '[object Function]',
numberClass = '[object Number]',
objectClass = '[object Object]',
regexpClass = '[object RegExp]',
stringClass = '[object String]';
/** Used to identify object classifications that `_.clone` supports */
var cloneableClasses = {};
cloneableClasses[funcClass] = false;
cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
cloneableClasses[boolClass] = cloneableClasses[dateClass] =
cloneableClasses[numberClass] = cloneableClasses[objectClass] =
cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;
/** Used as the property descriptor for `__bindData__` */
var descriptor = {
'configurable': false,
'enumerable': false,
'value': null,
'writable': false
};
/** Used as the data object for `iteratorTemplate` */
var iteratorData = {
'args': '',
'array': null,
'bottom': '',
'firstArg': '',
'init': '',
'keys': null,
'loop': '',
'shadowedProps': null,
'support': null,
'top': '',
'useHas': false
};
/** Used to determine if values are of the language type Object */
var objectTypes = {
'boolean': false,
'function': true,
'object': true,
'number': false,
'string': false,
'undefined': false
};
/** 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 the popular CommonJS extension `module.exports` */
var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
/** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
var freeGlobal = objectTypes[typeof global] && global;
if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
root = freeGlobal;
}
/*--------------------------------------------------------------------------*/
/**
* Gets an array from the array pool or creates a new one if the pool is empty.
*
* @private
* @returns {Array} The array from the pool.
*/
function getArray() {
return arrayPool.pop() || [];
}
/**
* Checks if `value` is a DOM node in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if the `value` is a DOM node, else `false`.
*/
function isNode(value) {
// IE < 9 presents DOM nodes as `Object` objects except they have `toString`
// methods that are `typeof` "string" and still can coerce nodes to strings
return typeof value.toString != 'function' && typeof (value + '') == 'string';
}
/**
* Releases the given array back to the array pool.
*
* @private
* @param {Array} [array] The array to release.
*/
function releaseArray(array) {
array.length = 0;
if (arrayPool.length < maxPoolSize) {
arrayPool.push(array);
}
}
/**
* Slices the `collection` from the `start` index up to, but not including,
* the `end` index.
*
* Note: This function is used instead of `Array#slice` to support node lists
* in IE < 9 and to ensure dense arrays are returned.
*
* @private
* @param {Array|Object|string} collection The collection to slice.
* @param {number} start The start index.
* @param {number} end The end index.
* @returns {Array} Returns the new array.
*/
function slice(array, start, end) {
start || (start = 0);
if (typeof end == 'undefined') {
end = array ? array.length : 0;
}
var index = -1,
length = end - start || 0,
result = Array(length < 0 ? 0 : length);
while (++index < length) {
result[index] = array[start + index];
}
return result;
}
/*--------------------------------------------------------------------------*/
/**
* Used for `Array` method references.
*
* Normally `Array.prototype` would suffice, however, using an array literal
* avoids issues in Narwhal.
*/
var arrayRef = [];
/** Used for native method references */
var errorProto = Error.prototype,
objectProto = Object.prototype,
stringProto = String.prototype;
/** Used to resolve the internal [[Class]] of values */
var toString = objectProto.toString;
/** Used to detect if a method is native */
var reNative = RegExp('^' +
String(toString)
.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
.replace(/toString| for [^\]]+/g, '.*?') + '$'
);
/** Native method shortcuts */
var fnToString = Function.prototype.toString,
hasOwnProperty = objectProto.hasOwnProperty,
push = arrayRef.push,
propertyIsEnumerable = objectProto.propertyIsEnumerable,
unshift = arrayRef.unshift;
/** Used to set meta data 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 shortcuts for methods with the same name as other `lodash` methods */
var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys;
/** Used to lookup a built-in constructor by [[Class]] */
var ctorByClass = {};
ctorByClass[arrayClass] = Array;
ctorByClass[boolClass] = Boolean;
ctorByClass[dateClass] = Date;
ctorByClass[funcClass] = Function;
ctorByClass[objectClass] = Object;
ctorByClass[numberClass] = Number;
ctorByClass[regexpClass] = RegExp;
ctorByClass[stringClass] = String;
/** Used to avoid iterating 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 };
(function() {
var length = shadowedProps.length;
while (length--) {
var key = shadowedProps[length];
for (var className in nonEnumProps) {
if (hasOwnProperty.call(nonEnumProps, className) && !hasOwnProperty.call(nonEnumProps[className], key)) {
nonEnumProps[className][key] = false;
}
}
}
}());
/*--------------------------------------------------------------------------*/
/**
* 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`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`,
* `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`,
* `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`,
* `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
* `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`,
* `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`,
* `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`,
* `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`,
* `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`,
* `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`,
* and `zip`
*
* The non-chainable wrapper functions are:
* `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`,
* `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`,
* `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`,
* `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`,
* `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`,
* `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`,
* `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`,
* `template`, `unescape`, `uniqueId`, and `value`
*
* The wrapper functions `first` and `last` return wrapped values when `n` is
* provided, otherwise they return unwrapped values.
*
* Explicit chaining can be enabled by using the `_.chain` method.
*
* @name _
* @constructor
* @category Chaining
* @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, num) {
* return sum + num;
* });
* // => 6
*
* // returns a wrapped value
* var squares = wrapped.map(function(num) {
* return num * num;
* });
*
* _.isArray(squares);
* // => false
*
* _.isArray(squares.value());
* // => true
*/
function lodash() {
// no operation performed
}
/**
* An object used to flag environments features.
*
* @static
* @memberOf _
* @type Object
*/
var support = lodash.support = {};
(function() {
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); }
for (key in arguments) { }
/**
* Detect if an `arguments` object's [[Class]] is resolvable (all but Firefox < 4, IE < 9).
*
* @memberOf _.support
* @type boolean
*/
support.argsClass = toString.call(arguments) == argsClass;
/**
* Detect if `arguments` objects are `Object` objects (all but Narwhal and Opera < 10.5).
*
* @memberOf _.support
* @type boolean
*/
support.argsObject = arguments.constructor == Object && !(arguments instanceof Array);
/**
* 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 a function's `prototype` property [[Enumerable]]
* value to `true`.
*
* @memberOf _.support
* @type boolean
*/
support.enumPrototypes = propertyIsEnumerable.call(ctor, 'prototype');
/**
* Detect if functions can be decompiled by `Function#toString`
* (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).
*
* @memberOf _.support
* @type boolean
*/
support.funcDecomp = !isNative(root.WinRTError) && reThis.test(function() { return this; });
/**
* Detect if `Function#name` is supported (all but IE).
*
* @memberOf _.support
* @type boolean
*/
support.funcNames = typeof Function.name == 'string';
/**
* Detect if `arguments` object indexes are non-enumerable
* (Firefox < 4, IE < 9, PhantomJS, Safari < 5.1).
*
* @memberOf _.support
* @type boolean
*/
support.nonEnumArgs = key != 0;
/**
* Detect if properties shadowing those on `Object.prototype` are non-enumerable.
*
* In IE < 9 an objects 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 `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 = (arrayRef.splice.call(object, 0, 1), !object[0]);
/**
* Detect lack of support for accessing string characters by index.
*
* IE < 8 can't access characters by index and IE 8 can only access
* characters by index on string literals.
*
* @memberOf _.support
* @type boolean
*/
support.unindexedChars = ('x'[0] + Object('x')[0]) != 'xx';
/**
* Detect if a DOM node's [[Class]] is resolvable (all but IE < 9)
* and that the JS engine errors when attempting to coerce an object to
* a string without a `toString` function.
*
* @memberOf _.support
* @type boolean
*/
try {
support.nodeClass = !(toString.call(document) == objectClass && !({ 'toString': 0 } + ''));
} catch(e) {
support.nodeClass = true;
}
}(1));
/*--------------------------------------------------------------------------*/
/**
* The template used to create iterator functions.
*
* @private
* @param {Object} data The data object used to populate the text.
* @returns {string} Returns the interpolated text.
*/
var iteratorTemplate = function(obj) {
var __p = 'var index, iterable = ' +
(obj.firstArg) +
', result = ' +
(obj.init) +
';\nif (!iterable) return result;\n' +
(obj.top) +
';';
if (obj.array) {
__p += '\nvar length = iterable.length; index = -1;\nif (' +
(obj.array) +
') { ';
if (support.unindexedChars) {
__p += '\n if (isString(iterable)) {\n iterable = iterable.split(\'\')\n } ';
}
__p += '\n while (++index < length) {\n ' +
(obj.loop) +
';\n }\n}\nelse { ';
} else if (support.nonEnumArgs) {
__p += '\n var length = iterable.length; index = -1;\n if (length && isArguments(iterable)) {\n while (++index < length) {\n index += \'\';\n ' +
(obj.loop) +
';\n }\n } else { ';
}
if (support.enumPrototypes) {
__p += '\n var skipProto = typeof iterable == \'function\';\n ';
}
if (support.enumErrorProps) {
__p += '\n var skipErrorProps = iterable === errorProto || iterable instanceof Error;\n ';
}
var conditions = []; if (support.enumPrototypes) { conditions.push('!(skipProto && index == "prototype")'); } if (support.enumErrorProps) { conditions.push('!(skipErrorProps && (index == "message" || index == "name"))'); }
if (obj.useHas && obj.keys) {
__p += '\n var ownIndex = -1,\n ownProps = objectTypes[typeof iterable] && keys(iterable),\n length = ownProps ? ownProps.length : 0;\n\n while (++ownIndex < length) {\n index = ownProps[ownIndex];\n';
if (conditions.length) {
__p += ' if (' +
(conditions.join(' && ')) +
') {\n ';
}
__p +=
(obj.loop) +
'; ';
if (conditions.length) {
__p += '\n }';
}
__p += '\n } ';
} else {
__p += '\n for (index in iterable) {\n';
if (obj.useHas) { conditions.push("hasOwnProperty.call(iterable, index)"); } if (conditions.length) {
__p += ' if (' +
(conditions.join(' && ')) +
') {\n ';
}
__p +=
(obj.loop) +
'; ';
if (conditions.length) {
__p += '\n }';
}
__p += '\n } ';
if (support.nonEnumShadows) {
__p += '\n\n if (iterable !== objectProto) {\n var ctor = iterable.constructor,\n isProto = iterable === (ctor && ctor.prototype),\n className = iterable === stringProto ? stringClass : iterable === errorProto ? errorClass : toString.call(iterable),\n nonEnum = nonEnumProps[className];\n ';
for (k = 0; k < 7; k++) {
__p += '\n index = \'' +
(obj.shadowedProps[k]) +
'\';\n if ((!(isProto && nonEnum[index]) && hasOwnProperty.call(iterable, index))';
if (!obj.useHas) {
__p += ' || (!nonEnum[index] && iterable[index] !== objectProto[index])';
}
__p += ') {\n ' +
(obj.loop) +
';\n } ';
}
__p += '\n } ';
}
}
if (obj.array || support.nonEnumArgs) {
__p += '\n}';
}
__p +=
(obj.bottom) +
';\nreturn result';
return __p
};
/*--------------------------------------------------------------------------*/
/**
* The base implementation of `_.bind` that creates the bound function and
* sets its meta data.
*
* @private
* @param {Array} bindData The bind data array.
* @returns {Function} Returns the new bound function.
*/
function baseBind(bindData) {
var func = bindData[0],
partialArgs = bindData[2],
thisArg = bindData[4];
function bound() {
// `Function#bind` spec
// http://es5.github.io/#x15.3.4.5
if (partialArgs) {
// avoid `arguments` object deoptimizations by using `slice` instead
// of `Array.prototype.slice.call` and not assigning `arguments` to a
// variable as a ternary expression
var args = slice(partialArgs);
push.apply(args, arguments);
}
// mimic the constructor's `return` behavior
// http://es5.github.io/#x13.2.2
if (this instanceof bound) {
// ensure `new bound` is an instance of `func`
var thisBinding = baseCreate(func.prototype),
result = func.apply(thisBinding, args || arguments);
return isObject(result) ? result : thisBinding;
}
return func.apply(thisArg, args || arguments);
}
setBindData(bound, bindData);
return bound;
}
/**
* The base implementation of `_.clone` without argument juggling or support
* for `thisArg` binding.
*
* @private
* @param {*} value The value to clone.
* @param {boolean} [isDeep=false] Specify a deep clone.
* @param {Function} [callback] The function to customize cloning values.
* @param {Array} [stackA=[]] Tracks traversed source objects.
* @param {Array} [stackB=[]] Associates clones with source counterparts.
* @returns {*} Returns the cloned value.
*/
function baseClone(value, isDeep, callback, stackA, stackB) {
if (callback) {
var result = callback(value);
if (typeof result != 'undefined') {
return result;
}
}
// inspect [[Class]]
var isObj = isObject(value);
if (isObj) {
var className = toString.call(value);
if (!cloneableClasses[className] || (!support.nodeClass && isNode(value))) {
return value;
}
var ctor = ctorByClass[className];
switch (className) {
case boolClass:
case dateClass:
return new ctor(+value);
case numberClass:
case stringClass:
return new ctor(value);
case regexpClass:
result = ctor(value.source, reFlags.exec(value));
result.lastIndex = value.lastIndex;
return result;
}
} else {
return value;
}
var isArr = isArray(value);
if (isDeep) {
// check for circular references and return corresponding clone
var initedStack = !stackA;
stackA || (stackA = getArray());
stackB || (stackB = getArray());
var length = stackA.length;
while (length--) {
if (stackA[length] == value) {
return stackB[length];
}
}
result = isArr ? ctor(value.length) : {};
}
else {
result = isArr ? slice(value) : assign({}, value);
}
// add array properties assigned by `RegExp#exec`
if (isArr) {
if (hasOwnProperty.call(value, 'index')) {
result.index = value.index;
}
if (hasOwnProperty.call(value, 'input')) {
result.input = value.input;
}
}
// exit for shallow clone
if (!isDeep) {
return result;
}
// add the source value to the stack of traversed objects
// and associate it with its clone
stackA.push(value);
stackB.push(result);
// recursively populate clone (susceptible to call stack limits)
(isArr ? baseEach : forOwn)(value, function(objValue, key) {
result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);
});
if (initedStack) {
releaseArray(stackA);
releaseArray(stackB);
}
return result;
}
/**
* The base implementation of `_.create` without support for assigning
* properties to the created object.
*
* @private
* @param {Object} prototype The object to inherit from.
* @returns {Object} Returns the new object.
*/
function baseCreate(prototype, properties) {
return isObject(prototype) ? nativeCreate(prototype) : {};
}
// fallback for browsers without `Object.create`
if (!nativeCreate) {
baseCreate = (function() {
function Object() {}
return function(prototype) {
if (isObject(prototype)) {
Object.prototype = prototype;
var result = new Object;
Object.prototype = null;
}
return result || root.Object();
};
}());
}
/**
* The base implementation of `_.createCallback` without support for creating
* "_.pluck" or "_.where" style callbacks.
*
* @private
* @param {*} [func=identity] The value to convert to a callback.
* @param {*} [thisArg] The `this` binding of the created callback.
* @param {number} [argCount] The number of arguments the callback accepts.
* @returns {Function} Returns a callback function.
*/
function baseCreateCallback(func, thisArg, argCount) {
if (typeof func != 'function') {
return identity;
}
// exit early for no `thisArg` or already bound by `Function#bind`
if (typeof thisArg == 'undefined' || !('prototype' in func)) {
return func;
}
var bindData = func.__bindData__;
if (typeof bindData == 'undefined') {
if (support.funcNames) {
bindData = !func.name;
}
bindData = bindData || !support.funcDecomp;
if (!bindData) {
var source = fnToString.call(func);
if (!support.funcNames) {
bindData = !reFuncName.test(source);
}
if (!bindData) {
// checks if `func` references the `this` keyword and stores the result
bindData = reThis.test(source);
setBindData(func, bindData);
}
}
}
// exit early if there are no `this` references or `func` is bound
if (bindData === false || (bindData !== true && bindData[1] & 1)) {
return func;
}
switch (argCount) {
case 1: return function(value) {
return func.call(thisArg, value);
};
case 2: return function(a, b) {
return func.call(thisArg, a, b);
};
case 3: return function(value, index, collection) {
return func.call(thisArg, value, index, collection);
};
case 4: return function(accumulator, value, index, collection) {
return func.call(thisArg, accumulator, value, index, collection);
};
}
return bind(func, thisArg);
}
/**
* The base implementation of `createWrapper` that creates the wrapper and
* sets its meta data.
*
* @private
* @param {Array} bindData The bind data array.
* @returns {Function} Returns the new function.
*/
function baseCreateWrapper(bindData) {
var func = bindData[0],
bitmask = bindData[1],
partialArgs = bindData[2],
partialRightArgs = bindData[3],
thisArg = bindData[4],
arity = bindData[5];
var isBind = bitmask & 1,
isBindKey = bitmask & 2,
isCurry = bitmask & 4,
isCurryBound = bitmask & 8,
key = func;
function bound() {
var thisBinding = isBind ? thisArg : this;
if (partialArgs) {
var args = slice(partialArgs);
push.apply(args, arguments);
}
if (partialRightArgs || isCurry) {
args || (args = slice(arguments));
if (partialRightArgs) {
push.apply(args, partialRightArgs);
}
if (isCurry && args.length < arity) {
bitmask |= 16 & ~32;
return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
}
}
args || (args = arguments);
if (isBindKey) {
func = thisBinding[key];
}
if (this instanceof bound) {
thisBinding = baseCreate(func.prototype);
var result = func.apply(thisBinding, args);
return isObject(result) ? result : thisBinding;
}
return func.apply(thisBinding, args);
}
setBindData(bound, bindData);
return bound;
}
/**
* The base implementation of `_.isEqual`, without support for `thisArg` binding,
* that allows partial "_.where" style comparisons.
*
* @private
* @param {*} a The value to compare.
* @param {*} b The other value to compare.
* @param {Function} [callback] The function to customize comparing values.
* @param {Function} [isWhere=false] A flag to indicate performing partial comparisons.
* @param {Array} [stackA=[]] Tracks traversed `a` objects.
* @param {Array} [stackB=[]] Tracks traversed `b` objects.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
*/
function baseIsEqual(a, b, callback, isWhere, stackA, stackB) {
// used to indicate that when comparing objects, `a` has at least the properties of `b`
if (callback) {
var result = callback(a, b);
if (typeof result != 'undefined') {
return !!result;
}
}
// exit early for identical values
if (a === b) {
// treat `+0` vs. `-0` as not equal
return a !== 0 || (1 / a == 1 / b);
}
var type = typeof a,
otherType = typeof b;
// exit early for unlike primitive values
if (a === a &&
!(a && objectTypes[type]) &&
!(b && objectTypes[otherType])) {
return false;
}
// exit early for `null` and `undefined` avoiding ES3's Function#call behavior
// http://es5.github.io/#x15.3.4.4
if (a == null || b == null) {
return a === b;
}
// compare [[Class]] names
var className = toString.call(a),
otherClass = toString.call(b);
if (className == argsClass) {
className = objectClass;
}
if (otherClass == argsClass) {
otherClass = objectClass;
}
if (className != otherClass) {
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.io/#x15.10.6.4)
// treat string primitives and their corresponding object instances as equal
return a == String(b);
}
var isArr = className == arrayClass;
if (!isArr) {
// unwrap any `lodash` wrapped values
var aWrapped = hasOwnProperty.call(a, '__wrapped__'),
bWrapped = hasOwnProperty.call(b, '__wrapped__');
if (aWrapped || bWrapped) {
return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB);
}
// exit for functions and DOM nodes
if (className != objectClass || (!support.nodeClass && (isNode(a) || isNode(b)))) {
return false;
}
// in older versions of Opera, `arguments` objects have `Array` constructors
var ctorA = !support.argsObject && isArguments(a) ? Object : a.constructor,
ctorB = !support.argsObject && isArguments(b) ? Object : 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) &&
('constructor' in a && 'constructor' in b)
) {
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.io/#x15.12.3)
var initedStack = !stackA;
stackA || (stackA = getArray());
stackB || (stackB = getArray());
var length = stackA.length;
while (length--) {
if (stackA[length] == a) {
return stackB[length] == b;
}
}
var size = 0;
result = true;
// 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
length = a.length;
size = b.length;
result = size == length;
if (result || isWhere) {
// deep compare the contents, ignoring non-numeric properties
while (size--) {
var index = length,
value = b[size];
if (isWhere) {
while (index--) {
if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) {
break;
}
}
} else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) {
break;
}
}
}
}
else {
// deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys`
// which, in this case, is more costly
forIn(b, function(value, key, b) {
if (hasOwnProperty.call(b, key)) {
// count the number of properties.
size++;
// deep compare each property value.
return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB));
}
});
if (result && !isWhere) {
// ensure both objects have the same number of properties
forIn(a, function(value, key, a) {
if (hasOwnProperty.call(a, key)) {
// `size` will be `-1` if `a` has more properties than `b`
return (result = --size > -1);
}
});
}
}
stackA.pop();
stackB.pop();
if (initedStack) {
releaseArray(stackA);
releaseArray(stackB);
}
return result;
}
/**
* Creates a function that, when called, either curries or invokes `func`
* with an optional `this` binding and partially applied arguments.
*
* @private
* @param {Function|string} func The function or method name to reference.
* @param {number} bitmask The bitmask of method flags to compose.
* The bitmask may be composed of the following flags:
* 1 - `_.bind`
* 2 - `_.bindKey`
* 4 - `_.curry`
* 8 - `_.curry` (bound)
* 16 - `_.partial`
* 32 - `_.partialRight`
* @param {Array} [partialArgs] An array of arguments to prepend to those
* provided to the new function.
* @param {Array} [partialRightArgs] An array of arguments to append to those
* provided to the new function.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {number} [arity] The arity of `func`.
* @returns {Function} Returns the new function.
*/
function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
var isBind = bitmask & 1,
isBindKey = bitmask & 2,
isCurry = bitmask & 4,
isCurryBound = bitmask & 8,
isPartial = bitmask & 16,
isPartialRight = bitmask & 32;
if (!isBindKey && !isFunction(func)) {
throw new TypeError;
}
if (isPartial && !partialArgs.length) {
bitmask &= ~16;
isPartial = partialArgs = false;
}
if (isPartialRight && !partialRightArgs.length) {
bitmask &= ~32;
isPartialRight = partialRightArgs = false;
}
var bindData = func && func.__bindData__;
if (bindData && bindData !== true) {
// clone `bindData`
bindData = slice(bindData);
if (bindData[2]) {
bindData[2] = slice(bindData[2]);
}
if (bindData[3]) {
bindData[3] = slice(bindData[3]);
}
// set `thisBinding` is not previously bound
if (isBind && !(bindData[1] & 1)) {
bindData[4] = thisArg;
}
// set if previously bound but not currently (subsequent curried functions)
if (!isBind && bindData[1] & 1) {
bitmask |= 8;
}
// set curried arity if not yet set
if (isCurry && !(bindData[1] & 4)) {
bindData[5] = arity;
}
// append partial left arguments
if (isPartial) {
push.apply(bindData[2] || (bindData[2] = []), partialArgs);
}
// append partial right arguments
if (isPartialRight) {
unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
}
// merge flags
bindData[1] |= bitmask;
return createWrapper.apply(null, bindData);
}
// fast path for `_.bind`
var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
}
/**
* Creates compiled iteration functions.
*
* @private
* @param {...Object} [options] The compile options object(s).
* @param {string} [options.array] Code to determine if the iterable is an array or array-like.
* @param {boolean} [options.useHas] Specify using `hasOwnProperty` checks in the object loop.
* @param {Function} [options.keys] A reference to `_.keys` for use in own property iteration.
* @param {string} [options.args] A comma separated string of iteration function arguments.
* @param {string} [options.top] Code to execute before the iteration branches.
* @param {string} [options.loop] Code to execute in the object loop.
* @param {string} [options.bottom] Code to execute after the iteration branches.
* @returns {Function} Returns the compiled function.
*/
function createIterator() {
// data properties
iteratorData.shadowedProps = shadowedProps;
// iterator options
iteratorData.array = iteratorData.bottom = iteratorData.loop = iteratorData.top = '';
iteratorData.init = 'iterable';
iteratorData.useHas = true;
// merge options into a template data object
for (var object, index = 0; object = arguments[index]; index++) {
for (var key in object) {
iteratorData[key] = object[key];
}
}
var args = iteratorData.args;
iteratorData.firstArg = /^[^,]+/.exec(args)[0];
// create the function factory
var factory = Function(
'baseCreateCallback, errorClass, errorProto, hasOwnProperty, ' +
'indicatorObject, isArguments, isArray, isString, keys, objectProto, ' +
'objectTypes, nonEnumProps, stringClass, stringProto, toString',
'return function(' + args + ') {\n' + iteratorTemplate(iteratorData) + '\n}'
);
// return the compiled function
return factory(
baseCreateCallback, errorClass, errorProto, hasOwnProperty,
indicatorObject, isArguments, isArray, isString, iteratorData.keys, objectProto,
objectTypes, nonEnumProps, stringClass, stringProto, toString
);
}
/**
* Checks if `value` is a native function.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if the `value` is a native function, else `false`.
*/
function isNative(value) {
return typeof value == 'function' && reNative.test(value);
}
/**
* Sets `this` binding data on a given function.
*
* @private
* @param {Function} func The function to set data on.
* @param {Array} value The data array to set.
*/
var setBindData = !defineProperty ? noop : function(func, value) {
descriptor.value = value;
defineProperty(func, '__bindData__', descriptor);
};
/*--------------------------------------------------------------------------*/
/**
* Checks if `value` is an `arguments` object.
*
* @static
* @memberOf _
* @category Objects
* @param {*} 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 value && typeof value == 'object' && typeof value.length == 'number' &&
toString.call(value) == argsClass || false;
}
// fallback for browsers that can't detect `arguments` objects by [[Class]]
if (!support.argsClass) {
isArguments = function(value) {
return value && typeof value == 'object' && typeof value.length == 'number' &&
hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee') || false;
};
}
/**
* Checks if `value` is an array.
*
* @static
* @memberOf _
* @type Function
* @category Objects
* @param {*} 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 value && typeof value == 'object' && typeof value.length == 'number' &&
toString.call(value) == arrayClass || false;
};
/**
* A fallback implementation of `Object.keys` which produces an array of the
* given object's own enumerable property names.
*
* @private
* @type Function
* @param {Object} object The object to inspect.
* @returns {Array} Returns an array of property names.
*/
var shimKeys = createIterator({
'args': 'object',
'init': '[]',
'top': 'if (!(objectTypes[typeof object])) return result',
'loop': 'result.push(index)'
});
/**
* Creates an array composed of the own enumerable property names of an object.
*
* @static
* @memberOf _
* @category Objects
* @param {Object} object The object to inspect.
* @returns {Array} Returns an array of property names.
* @example
*
* _.keys({ 'one': 1, 'two': 2, 'three': 3 });
* // => ['one', 'two', 'three'] (property order is not guaranteed across environments)
*/
var keys = !nativeKeys ? shimKeys : function(object) {
if (!isObject(object)) {
return [];
}
if ((support.enumPrototypes && typeof object == 'function') ||
(support.nonEnumArgs && object.length && isArguments(object))) {
return shimKeys(object);
}
return nativeKeys(object);
};
/** Reusable iterator options shared by `each`, `forIn`, and `forOwn` */
var eachIteratorOptions = {
'args': 'collection, callback, thisArg',
'top': "callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3)",
'array': "typeof length == 'number'",
'keys': keys,
'loop': 'if (callback(iterable[index], index, collection) === false) return result'
};
/** Reusable iterator options for `assign` and `defaults` */
var defaultsIteratorOptions = {
'args': 'object, source, guard',
'top':
'var args = arguments,\n' +
' argsIndex = 0,\n' +
" argsLength = typeof guard == 'number' ? 2 : args.length;\n" +
'while (++argsIndex < argsLength) {\n' +
' iterable = args[argsIndex];\n' +
' if (iterable && objectTypes[typeof iterable]) {',
'keys': keys,
'loop': "if (typeof result[index] == 'undefined') result[index] = iterable[index]",
'bottom': ' }\n}'
};
/** Reusable iterator options for `forIn` and `forOwn` */
var forOwnIteratorOptions = {
'top': 'if (!objectTypes[typeof iterable]) return result;\n' + eachIteratorOptions.top,
'array': false
};
/**
* A function compiled to iterate `arguments` objects, arrays, objects, and
* strings consistenly across environments, 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`.
*
* @private
* @type Function
* @param {Array|Object|string} collection The collection to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {Array|Object|string} Returns `collection`.
*/
var baseEach = createIterator(eachIteratorOptions);
/*--------------------------------------------------------------------------*/
/**
* Assigns own enumerable properties of source object(s) to the destination
* object. Subsequent sources will overwrite property assignments of previous
* sources. If a callback is provided it will be executed to produce the
* assigned values. The callback is bound to `thisArg` and invoked with two
* arguments; (objectValue, sourceValue).
*
* @static
* @memberOf _
* @type Function
* @alias extend
* @category Objects
* @param {Object} object The destination object.
* @param {...Object} [source] The source objects.
* @param {Function} [callback] The function to customize assigning values.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns the destination object.
* @example
*
* _.assign({ 'name': 'fred' }, { 'employer': 'slate' });
* // => { 'name': 'fred', 'employer': 'slate' }
*
* var defaults = _.partialRight(_.assign, function(a, b) {
* return typeof a == 'undefined' ? b : a;
* });
*
* var object = { 'name': 'barney' };
* defaults(object, { 'name': 'fred', 'employer': 'slate' });
* // => { 'name': 'barney', 'employer': 'slate' }
*/
var assign = createIterator(defaultsIteratorOptions, {
'top':
defaultsIteratorOptions.top.replace(';',
';\n' +
"if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {\n" +
' var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);\n' +
"} else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {\n" +
' callback = args[--argsLength];\n' +
'}'
),
'loop': 'result[index] = callback ? callback(result[index], iterable[index]) : iterable[index]'
});
/**
* Creates a clone of `value`. If `isDeep` is `true` nested objects will also
* be cloned, otherwise they will be assigned by reference. If a callback
* is provided it will be executed to produce the cloned values. If the
* callback returns `undefined` cloning will be handled by the method instead.
* The callback is bound to `thisArg` and invoked with one argument; (value).
*
* @static
* @memberOf _
* @category Objects
* @param {*} value The value to clone.
* @param {boolean} [isDeep=false] Specify a deep clone.
* @param {Function} [callback] The function to customize cloning values.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {*} Returns the cloned value.
* @example
*
* var characters = [
* { 'name': 'barney', 'age': 36 },
* { 'name': 'fred', 'age': 40 }
* ];
*
* var shallow = _.clone(characters);
* shallow[0] === characters[0];
* // => true
*
* var deep = _.clone(characters, true);
* deep[0] === characters[0];
* // => false
*
* _.mixin({
* 'clone': _.partialRight(_.clone, function(value) {
* return _.isElement(value) ? value.cloneNode(false) : undefined;
* })
* });
*
* var clone = _.clone(document.body);
* clone.childNodes.length;
* // => 0
*/
function clone(value, isDeep, callback, thisArg) {
// allows working with "Collections" methods without using their `index`
// and `collection` arguments for `isDeep` and `callback`
if (typeof isDeep != 'boolean' && isDeep != null) {
thisArg = callback;
callback = isDeep;
isDeep = false;
}
return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
}
/**
* Creates a deep clone of `value`. If a callback is provided it will be
* executed to produce the cloned values. If the callback returns `undefined`
* cloning will be handled by the method instead. The callback is bound to
* `thisArg` and invoked with one argument; (value).
*
* Note: This method is loosely based on the structured clone algorithm. Functions
* and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
* objects created by constructors other than `Object` are cloned to plain `Object` objects.
* See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
*
* @static
* @memberOf _
* @category Objects
* @param {*} value The value to deep clone.
* @param {Function} [callback] The function to customize cloning values.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {*} Returns the deep cloned value.
* @example
*
* var characters = [
* { 'name': 'barney', 'age': 36 },
* { 'name': 'fred', 'age': 40 }
* ];
*
* var deep = _.cloneDeep(characters);
* deep[0] === characters[0];
* // => false
*
* var view = {
* 'label': 'docs',
* 'node': element
* };
*
* var clone = _.cloneDeep(view, function(value) {
* return _.isElement(value) ? value.cloneNode(true) : undefined;
* });
*
* clone.node == view.node;
* // => false
*/
function cloneDeep(value, callback, thisArg) {
return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
}
/**
* Iterates over own and inherited enumerable properties of an object,
* 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 _
* @type Function
* @category Objects
* @param {Object} object The object to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns `object`.
* @example
*
* function Shape() {
* this.x = 0;
* this.y = 0;
* }
*
* Shape.prototype.move = function(x, y) {
* this.x += x;
* this.y += y;
* };
*
* _.forIn(new Shape, function(value, key) {
* console.log(key);
* });
* // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments)
*/
var forIn = createIterator(eachIteratorOptions, forOwnIteratorOptions, {
'useHas': false
});
/**
* Iterates over own enumerable properties of an object, 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 _
* @type Function
* @category Objects
* @param {Object} object The object to iterate over.
* @param {Function} [callback=identity] The function called per iteration.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {Object} Returns `object`.
* @example
*
* _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
* console.log(key);
* });
* // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
*/
var forOwn = createIterator(eachIteratorOptions, forOwnIteratorOptions);
/**
* Checks if `value` is a date.
*
* @static
* @memberOf _
* @category Objects
* @param {*} 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 value && typeof value == 'object' && toString.call(value) == dateClass || 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
*/
function isEmpty(value) {
var result = true;
if (!value) {
return result;
}
var className = toString.call(value),
length = value.length;
if ((className == arrayClass || className == stringClass ||
(support.argsClass ? className == argsClass : isArguments(value))) ||
(className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
return !length;
}
forOwn(value, function() {
return (result = false);
});
return result;
}
/**
* Checks if `value` is a function.
*
* @static
* @memberOf _
* @category Objects
* @param {*} 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 typeof value == 'function' && toString.call(value) == funcClass;
};
}
/**
* 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 {*} 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.io/#x8
// and avoid a V8 bug
// http://code.google.com/p/v8/issues/detail?id=2291
return !!(value && objectTypes[typeof value]);
}
/**
* Checks if `value` is `null`.
*
* @static
* @memberOf _
* @category Objects
* @param {*} 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 string.
*
* @static
* @memberOf _
* @category Objects
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if the `value` is a string, else `false`.
* @example
*
* _.isString('fred');
* // => true
*/
function isString(value) {
return typeof value == 'string' ||
value && typeof value == 'object' && toString.call(value) == stringClass || false;
}
/**
* Checks if `value` is `undefined`.
*
* @static
* @memberOf _
* @category Objects
* @param {*} 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 typeof value == 'undefined';
}
/*--------------------------------------------------------------------------*/
/**
* Iterates over elements of a collection, returning an array of all elements
* the callback returns truey for. The callback is bound to `thisArg` and
* invoked with three arguments; (value, index|key, collection).
*
* If a property name is provided for `callback` the created "_.pluck" style
* callback will return the property value of the given element.
*
* If an object is provided for `callback` the created "_.where" style callback
* will return `true` for elements that have the properties of the given object,
* else `false`.
*
* @static
* @memberOf _
* @alias select
* @category Collections
* @param {Array|Object|string} collection The collection to iterate over.
* @param {Function|Object|string} [callback=identity] The function called
* per iteration. If a property name or object is provided it will be used
* to create a "_.pluck" or "_.where" style callback, respectively.
* @param {*} [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 characters = [
* { 'name': 'barney', 'age': 36, 'blocked': false },
* { 'name': 'fred', 'age': 40, 'blocked': true }
* ];
*
* // using "_.pluck" callback shorthand
* _.filter(characters, 'blocked');
* // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
*
* // using "_.where" callback shorthand
* _.filter(characters, { 'age': 36 });
* // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
*/
function filter(collection, callback, thisArg) {
var result = [];
callback = lodash.createCallback(callback, thisArg, 3);
if (isArray(collection)) {
var index = -1,
length = collection.length;
while (++index < length) {
var value = collection[index];
if (callback(value, index, collection)) {
result.push(value);
}
}
} else {
baseEach(collection, function(value, index, collection) {
if (callback(value, index, collection)) {
result.push(value);
}
});
}
return result;
}
/**
* Iterates over elements of a collection, returning the first element that
* the callback returns truey for. The callback is bound to `thisArg` and
* invoked with three arguments; (value, index|key, collection).
*
* If a property name is provided for `callback` the created "_.pluck" style
* callback will return the property value of the given element.
*
* If an object is provided for `callback` the created "_.where" style callback
* will return `true` for elements that have the properties of the given object,
* else `false`.
*
* @static
* @memberOf _
* @alias detect, findWhere
* @category Collections
* @param {Array|Object|string} collection The collection to iterate over.
* @param {Function|Object|string} [callback=identity] The function called
* per iteration. If a property name or object is provided it will be used
* to create a "_.pluck" or "_.where" style callback, respectively.
* @param {*} [thisArg] The `this` binding of `callback`.
* @returns {*} Returns the found element, else `undefined`.
* @example
*
* var characters = [
* { 'name': 'barney', 'age': 36, 'blocked': false },
* { 'name': 'fred', 'age': 40, 'blocked': true },
* { 'name': 'pebbles', 'age': 1, 'blocked': false }
* ];
*
* _.find(characters, function(chr) {
* return chr.age < 40;
* });
* // => { 'name': 'barney', 'age': 36, 'blocked': false }
*
* // using "_.where" callback shorthand
* _.find(characters, { 'age': 1 });
* // => { 'name': 'pebbles', 'age': 1, 'blocked': false }
*
* // using "_.pluck" callback shorthand
* _.find(characters, 'blocked');
* // => { 'name': 'fred', 'age': 40, 'blocked': true }
*/
function find(collection, callback, thisArg) {
callback = lodash.createCallback(callback, thisArg, 3);
if (isArray(collection)) {
var index = -1,
length = collection.length;
while (++index < length) {
var value = collection[index];
if (callback(value, index, collection)) {
return value;
}
}
} else {
var result;
baseEach(collection, function(value, index, collection) {
if (callback(value, index, collection)) {
result = value;
return false;
}
});
return result;
}
}
/**
* Creates an array of values by running each element in the collection
* through the callback. The callback is bound to `thisArg` and invoked with
* three arguments; (value, index|key, collection).
*
* If a property name is provided for `callback` the created "_.pluck" style
* callback will return the property value of the given element.
*
* If an object is provided for `callback` the created "_.where" style callback
* will return `true` for elements that have the properties of the given object,
* else `false`.
*
* @static
* @memberOf _
* @alias collect
* @category Collections
* @param {Array|Object|string} collection The collection to iterate over.
* @param {Function|Object|string} [callback=identity] The function called
* per iteration. If a property name or object is provided it will be used
* to create a "_.pluck" or "_.where" style callback, respectively.
* @param {*} [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] (property order is not guaranteed across environments)
*
* var characters = [
* { 'name': 'barney', 'age': 36 },
* { 'name': 'fred', 'age': 40 }
* ];
*
* // using "_.pluck" callback shorthand
* _.map(characters, 'name');
* // => ['barney', 'fred']
*/
function map(collection, callback, thisArg) {
var index = -1,
length = collection ? collection.length : 0,
result = Array(typeof length == 'number' ? length : 0);
callback = lodash.createCallback(callback, thisArg, 3);
if (isArray(collection)) {
while (++index < length) {
result[index] = callback(collection[index], index, collection);
}
} else {
baseEach(collection, function(value, key, collection) {
result[++index] = callback(value, key, collection);
});
}
return result;
}
/*--------------------------------------------------------------------------*/
/**
* Creates an array with all falsey values 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 array of filtered values.
* @example
*
* _.compact([0, 1, false, 2, '', 3]);
* // => [1, 2, 3]
*/
function compact(array) {
var index = -1,
length = array ? array.length : 0,
result = [];
while (++index < length) {
var value = array[index];
if (value) {
result.push(value);
}
}
return result;
}
/*--------------------------------------------------------------------------*/
/**
* Creates a function that, when called, invokes `func` with the `this`
* binding of `thisArg` and prepends any additional `bind` arguments to those
* provided to the bound function.
*
* @static
* @memberOf _
* @category Functions
* @param {Function} func The function to bind.
* @param {*} [thisArg] The `this` binding of `func`.
* @param {...*} [arg] 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': 'fred' }, 'hi');
* func();
* // => 'hi fred'
*/
function bind(func, thisArg) {
return arguments.length > 2
? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
: createWrapper(func, 1, null, null, thisArg);
}
/*--------------------------------------------------------------------------*/
/**
* Produces a callback bound to an optional `thisArg`. If `func` is a property
* name the created callback will return the property value for a given element.
* If `func` is an object the created callback will return `true` for elements
* that contain the equivalent object properties, otherwise it will return `false`.
*
* @static
* @memberOf _
* @category Utilities
* @param {*} [func=identity] The value to convert to a callback.
* @param {*} [thisArg] The `this` binding of the created callback.
* @param {number} [argCount] The number of arguments the callback accepts.
* @returns {Function} Returns a callback function.
* @example
*
* var characters = [
* { 'name': 'barney', 'age': 36 },
* { 'name': 'fred', 'age': 40 }
* ];
*
* // wrap to create custom callback shorthands
* _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) {
* var match = /^(.+?)__([gl]t)(.+)$/.exec(callback);
* return !match ? func(callback, thisArg) : function(object) {
* return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
* };
* });
*
* _.filter(characters, 'age__gt38');
* // => [{ 'name': 'fred', 'age': 40 }]
*/
function createCallback(func, thisArg, argCount) {
var type = typeof func;
if (func == null || type == 'function') {
return baseCreateCallback(func, thisArg, argCount);
}
// handle "_.pluck" style callback shorthands
if (type != 'object') {
return property(func);
}
var props = keys(func),
key = props[0],
a = func[key];
// handle "_.where" style callback shorthands
if (props.length == 1 && a === a && !isObject(a)) {
// fast path the common case of providing an object with a single
// property containing a primitive value
return function(object) {
var b = object[key];
return a === b && (a !== 0 || (1 / a == 1 / b));
};
}
return function(object) {
var length = props.length,
result = false;
while (length--) {
if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) {
break;
}
}
return result;
};
}
/**
* This method returns the first argument provided to it.
*
* @static
* @memberOf _
* @category Utilities
* @param {*} value Any value.
* @returns {*} Returns `value`.
* @example
*
* var object = { 'name': 'fred' };
* _.identity(object) === object;
* // => true
*/
function identity(value) {
return value;
}
/**
* A no-operation function.
*
* @static
* @memberOf _
* @category Utilities
* @example
*
* var object = { 'name': 'fred' };
* _.noop(object) === undefined;
* // => true
*/
function noop() {
// no operation performed
}
/**
* Creates a "_.pluck" style function, which returns the `key` value of a
* given object.
*
* @static
* @memberOf _
* @category Utilities
* @param {string} key The name of the property to retrieve.
* @returns {Function} Returns the new function.
* @example
*
* var characters = [
* { 'name': 'fred', 'age': 40 },
* { 'name': 'barney', 'age': 36 }
* ];
*
* var getName = _.property('name');
*
* _.map(characters, getName);
* // => ['barney', 'fred']
*
* _.sortBy(characters, getName);
* // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }]
*/
function property(key) {
return function(object) {
return object[key];
};
}
/*--------------------------------------------------------------------------*/
lodash.assign = assign;
lodash.bind = bind;
lodash.compact = compact;
lodash.createCallback = createCallback;
lodash.filter = filter;
lodash.forIn = forIn;
lodash.forOwn = forOwn;
lodash.keys = keys;
lodash.map = map;
lodash.property = property;
// add aliases
lodash.collect = map;
lodash.extend = assign;
lodash.select = filter;
/*--------------------------------------------------------------------------*/
// add functions that return unwrapped values when chaining
lodash.clone = clone;
lodash.cloneDeep = cloneDeep;
lodash.find = find;
lodash.identity = identity;
lodash.isArguments = isArguments;
lodash.isArray = isArray;
lodash.isDate = isDate;
lodash.isEmpty = isEmpty;
lodash.isFunction = isFunction;
lodash.isNull = isNull;
lodash.isObject = isObject;
lodash.isString = isString;
lodash.isUndefined = isUndefined;
lodash.noop = noop;
lodash.detect = find;
lodash.findWhere = find;
/*--------------------------------------------------------------------------*/
/**
* The semantic version number.
*
* @static
* @memberOf _
* @type string
*/
lodash.VERSION = '2.4.1';
/*--------------------------------------------------------------------------*/
window.lodash = lodash;
}.call(this));
Raw
myjson.js
/*
http://www.JSON.org/json2.js
2011-02-23
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
See http://www.JSON.org/js.html
This code should be minified before deployment.
See http://javascript.crockford.com/jsmin.html
USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
NOT CONTROL.
This file creates a global JSON object containing two methods: stringify
and parse.
JSON.stringify(value, replacer, space)
value any JavaScript value, usually an object or array.
replacer an optional parameter that determines how object
values are stringified for objects. It can be a
function or an array of strings.
space an optional parameter that specifies the indentation
of nested structures. If it is omitted, the text will
be packed without extra whitespace. If it is a number,
it will specify the number of spaces to indent at each
level. If it is a string (such as '\t' or '&nbsp;'),
it contains the characters used to indent at each level.
This method produces a JSON text from a JavaScript value.
When an object value is found, if the object contains a toJSON
method, its toJSON method will be called and the result will be
stringified. A toJSON method does not serialize: it returns the
value represented by the name/value pair that should be serialized,
or undefined if nothing should be serialized. The toJSON method
will be passed the key associated with the value, and this will be
bound to the value
For example, this would serialize Dates as ISO strings.
Date.prototype.toJSON = function (key) {
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
return this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
f(this.getUTCHours()) + ':' +
f(this.getUTCMinutes()) + ':' +
f(this.getUTCSeconds()) + 'Z';
};
You can provide an optional replacer method. It will be passed the
key and value of each member, with this bound to the containing
object. The value that is returned from your method will be
serialized. If your method returns undefined, then the member will
be excluded from the serialization.
If the replacer parameter is an array of strings, then it will be
used to select the members to be serialized. It filters the results
such that only members with keys listed in the replacer array are
stringified.
Values that do not have JSON representations, such as undefined or
functions, will not be serialized. Such values in objects will be
dropped; in arrays they will be replaced with null. You can use
a replacer function to replace those with JSON values.
JSON.stringify(undefined) returns undefined.
The optional space parameter produces a stringification of the
value that is filled with line breaks and indentation to make it
easier to read.
If the space parameter is a non-empty string, then that string will
be used for indentation. If the space parameter is a number, then
the indentation will be that many spaces.
Example:
text = JSON.stringify(['e', {pluribus: 'unum'}]);
// text is '["e",{"pluribus":"unum"}]'
text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
// text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
text = JSON.stringify([new Date()], function (key, value) {
return this[key] instanceof Date ?
'Date(' + this[key] + ')' : value;
});
// text is '["Date(---current time---)"]'
JSON.parse(text, reviver)
This method parses a JSON text to produce an object or array.
It can throw a SyntaxError exception.
The optional reviver parameter is a function that can filter and
transform the results. It receives each of the keys and values,
and its return value is used instead of the original value.
If it returns what it received, then the structure is not modified.
If it returns undefined then the member is deleted.
Example:
// Parse the text. Values that look like ISO date strings will
// be converted to Date objects.
myData = JSON.parse(text, function (key, value) {
var a;
if (typeof value === 'string') {
a =
/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
if (a) {
return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+a[5], +a[6]));
}
}
return value;
});
myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
var d;
if (typeof value === 'string' &&
value.slice(0, 5) === 'Date(' &&
value.slice(-1) === ')') {
d = new Date(value.slice(5, -1));
if (d) {
return d;
}
}
return value;
});
This is a reference implementation. You are free to copy, modify, or
redistribute.
*/
/*jslint evil: true, strict: false, regexp: false */
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
lastIndex, length, parse, prototype, push, replace, slice, stringify,
test, toJSON, toString, valueOf
*/
// Create a JSON object only if one does not already exist. We create the
// methods in a closure to avoid creating global variables.
var JSON;
if (!JSON) {
JSON = {};
}
(function () {
"use strict";
var global = Function('return this')()
, JSON = global.JSON
;
if (!JSON) {
JSON = {};
}
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
if (typeof Date.prototype.toJSON !== 'function') {
Date.prototype.toJSON = function (key) {
return isFinite(this.valueOf()) ?
this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
f(this.getUTCHours()) + ':' +
f(this.getUTCMinutes()) + ':' +
f(this.getUTCSeconds()) + 'Z' : null;
};
String.prototype.toJSON =
Number.prototype.toJSON =
Boolean.prototype.toJSON = function (key) {
return this.valueOf();
};
}
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
gap,
indent,
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
},
rep;
function quote(string) {
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.
escapable.lastIndex = 0;
return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
var c = meta[a];
return typeof c === 'string' ? c :
'\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) + '"' : '"' + string + '"';
}
function str(key, holder) {
// Produce a string from holder[key].
var i, // The loop counter.
k, // The member key.
v, // The member value.
length,
mind = gap,
partial,
value = holder[key];
// If the value has a toJSON method, call it to obtain a replacement value.
if (value && typeof value === 'object' &&
typeof value.toJSON === 'function') {
value = value.toJSON(key);
}
// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.
if (typeof rep === 'function') {
value = rep.call(holder, key, value);
}
// What happens next depends on the value's type.
switch (typeof value) {
case 'string':
return quote(value);
case 'number':
// JSON numbers must be finite. Encode non-finite numbers as null.
return isFinite(value) ? String(value) : 'null';
case 'boolean':
case 'null':
// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.
return String(value);
// If the type is 'object', we might be dealing with an object or an array or
// null.
case 'object':
// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.
if (!value) {
return 'null';
}
// Make an array to hold the partial results of stringifying this object value.
gap += indent;
partial = [];
// Is the value an array?
if (Object.prototype.toString.apply(value) === '[object Array]') {
// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.
length = value.length;
for (i = 0; i < length; i += 1) {
partial[i] = str(i, value) || 'null';
}
// Join all of the elements together, separated with commas, and wrap them in
// brackets.
v = partial.length === 0 ? '[]' : gap ?
'[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
'[' + partial.join(',') + ']';
gap = mind;
return v;
}
// If the replacer is an array, use it to select the members to be stringified.
if (rep && typeof rep === 'object') {
length = rep.length;
for (i = 0; i < length; i += 1) {
if (typeof rep[i] === 'string') {
k = rep[i];
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
} else {
// Otherwise, iterate through all of the keys in the object.
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
}
// Join all of the member texts together, separated with commas,
// and wrap them in braces.
v = partial.length === 0 ? '{}' : gap ?
'{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
'{' + partial.join(',') + '}';
gap = mind;
return v;
}
}
// If the JSON object does not yet have a stringify method, give it one.
if (typeof JSON.stringify !== 'function') {
JSON.stringify = function (value, replacer, space) {
// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.
var i;
gap = '';
indent = '';
// If the space parameter is a number, make an indent string containing that
// many spaces.
if (typeof space === 'number') {
for (i = 0; i < space; i += 1) {
indent += ' ';
}
// If the space parameter is a string, it will be used as the indent string.
} else if (typeof space === 'string') {
indent = space;
}
// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.
rep = replacer;
if (replacer && typeof replacer !== 'function' &&
(typeof replacer !== 'object' ||
typeof replacer.length !== 'number')) {
throw new Error('JSON.stringify');
}
// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.
return str('', {'': value});
};
}
// If the JSON object does not yet have a parse method, give it one.
if (typeof JSON.parse !== 'function') {
JSON.parse = function (text, reviver) {
// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.
var j;
function walk(holder, key) {
// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.
var k, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}
// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.
text = String(text);
cx.lastIndex = 0;
if (cx.test(text)) {
text = text.replace(cx, function (a) {
return '\\u' +
('0000' + a.charCodeAt(0).toString(16)).slice(-4);
});
}
// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.
// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
if (/^[\],:{}\s]*$/
.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
.replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.
j = eval('(' + text + ')');
// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.
return typeof reviver === 'function' ?
walk({'': j}, '') : j;
}
// If the text is not JSON parseable, then a SyntaxError is thrown.
throw new SyntaxError('JSON.parse');
};
}
window.myjson = JSON;
}());
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