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-// Underscore.js 1.3.1
-// (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc.
-// Underscore is freely distributable under the MIT license.
-// Portions of Underscore are inspired or borrowed from Prototype,
-// Oliver Steele's Functional, and John Resig's Micro-Templating.
-// For all details and documentation:
-// http://documentcloud.github.com/underscore
-
-(function() {
-
- // Baseline setup
- // --------------
-
- // Establish the root object, `window` in the browser, or `global` on the server.
- var root = this;
-
- // Save the previous value of the `_` variable.
- var previousUnderscore = root._;
-
- // Establish the object that gets returned to break out of a loop iteration.
- var breaker = {};
-
- // Save bytes in the minified (but not gzipped) version:
- var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
-
- // Create quick reference variables for speed access to core prototypes.
- var slice = ArrayProto.slice,
- unshift = ArrayProto.unshift,
- toString = ObjProto.toString,
- hasOwnProperty = ObjProto.hasOwnProperty;
-
- // All **ECMAScript 5** native function implementations that we hope to use
- // are declared here.
- var
- nativeForEach = ArrayProto.forEach,
- nativeMap = ArrayProto.map,
- nativeReduce = ArrayProto.reduce,
- nativeReduceRight = ArrayProto.reduceRight,
- nativeFilter = ArrayProto.filter,
- nativeEvery = ArrayProto.every,
- nativeSome = ArrayProto.some,
- nativeIndexOf = ArrayProto.indexOf,
- nativeLastIndexOf = ArrayProto.lastIndexOf,
- nativeIsArray = Array.isArray,
- nativeKeys = Object.keys,
- nativeBind = FuncProto.bind;
-
- // Create a safe reference to the Underscore object for use below.
- var _ = function(obj) { return new wrapper(obj); };
-
- // Export the Underscore object for **Node.js**, with
- // backwards-compatibility for the old `require()` API. If we're in
- // the browser, add `_` as a global object via a string identifier,
- // for Closure Compiler "advanced" mode.
- if (typeof exports !== 'undefined') {
- if (typeof module !== 'undefined' && module.exports) {
- exports = module.exports = _;
- }
- exports._ = _;
- } else {
- root['_'] = _;
- }
-
- // Current version.
- _.VERSION = '1.3.1';
-
- // Collection Functions
- // --------------------
-
- // The cornerstone, an `each` implementation, aka `forEach`.
- // Handles objects with the built-in `forEach`, arrays, and raw objects.
- // Delegates to **ECMAScript 5**'s native `forEach` if available.
- var each = _.each = _.forEach = function(obj, iterator, context) {
- if (obj == null) return;
- if (nativeForEach && obj.forEach === nativeForEach) {
- obj.forEach(iterator, context);
- } else if (obj.length === +obj.length) {
- for (var i = 0, l = obj.length; i < l; i++) {
- if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return;
- }
- } else {
- for (var key in obj) {
- if (_.has(obj, key)) {
- if (iterator.call(context, obj[key], key, obj) === breaker) return;
- }
- }
- }
- };
-
- // Return the results of applying the iterator to each element.
- // Delegates to **ECMAScript 5**'s native `map` if available.
- _.map = _.collect = function(obj, iterator, context) {
- var results = [];
- if (obj == null) return results;
- if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
- each(obj, function(value, index, list) {
- results[results.length] = iterator.call(context, value, index, list);
- });
- if (obj.length === +obj.length) results.length = obj.length;
- return results;
- };
-
- // **Reduce** builds up a single result from a list of values, aka `inject`,
- // or `foldl`. Delegates to **ECMAScript 5**'s native `reduce` if available.
- _.reduce = _.foldl = _.inject = function(obj, iterator, memo, context) {
- var initial = arguments.length > 2;
- if (obj == null) obj = [];
- if (nativeReduce && obj.reduce === nativeReduce) {
- if (context) iterator = _.bind(iterator, context);
- return initial ? obj.reduce(iterator, memo) : obj.reduce(iterator);
- }
- each(obj, function(value, index, list) {
- if (!initial) {
- memo = value;
- initial = true;
- } else {
- memo = iterator.call(context, memo, value, index, list);
- }
- });
- if (!initial) throw new TypeError('Reduce of empty array with no initial value');
- return memo;
- };
-
- // The right-associative version of reduce, also known as `foldr`.
- // Delegates to **ECMAScript 5**'s native `reduceRight` if available.
- _.reduceRight = _.foldr = function(obj, iterator, memo, context) {
- var initial = arguments.length > 2;
- if (obj == null) obj = [];
- if (nativeReduceRight && obj.reduceRight === nativeReduceRight) {
- if (context) iterator = _.bind(iterator, context);
- return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator);
- }
- var reversed = _.toArray(obj).reverse();
- if (context && !initial) iterator = _.bind(iterator, context);
- return initial ? _.reduce(reversed, iterator, memo, context) : _.reduce(reversed, iterator);
- };
-
- // Return the first value which passes a truth test. Aliased as `detect`.
- _.find = _.detect = function(obj, iterator, context) {
- var result;
- any(obj, function(value, index, list) {
- if (iterator.call(context, value, index, list)) {
- result = value;
- return true;
- }
- });
- return result;
- };
-
- // Return all the elements that pass a truth test.
- // Delegates to **ECMAScript 5**'s native `filter` if available.
- // Aliased as `select`.
- _.filter = _.select = function(obj, iterator, context) {
- var results = [];
- if (obj == null) return results;
- if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context);
- each(obj, function(value, index, list) {
- if (iterator.call(context, value, index, list)) results[results.length] = value;
- });
- return results;
- };
-
- // Return all the elements for which a truth test fails.
- _.reject = function(obj, iterator, context) {
- var results = [];
- if (obj == null) return results;
- each(obj, function(value, index, list) {
- if (!iterator.call(context, value, index, list)) results[results.length] = value;
- });
- return results;
- };
-
- // Determine whether all of the elements match a truth test.
- // Delegates to **ECMAScript 5**'s native `every` if available.
- // Aliased as `all`.
- _.every = _.all = function(obj, iterator, context) {
- var result = true;
- if (obj == null) return result;
- if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context);
- each(obj, function(value, index, list) {
- if (!(result = result && iterator.call(context, value, index, list))) return breaker;
- });
- return result;
- };
-
- // Determine if at least one element in the object matches a truth test.
- // Delegates to **ECMAScript 5**'s native `some` if available.
- // Aliased as `any`.
- var any = _.some = _.any = function(obj, iterator, context) {
- iterator || (iterator = _.identity);
- var result = false;
- if (obj == null) return result;
- if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
- each(obj, function(value, index, list) {
- if (result || (result = iterator.call(context, value, index, list))) return breaker;
- });
- return !!result;
- };
-
- // Determine if a given value is included in the array or object using `===`.
- // Aliased as `contains`.
- _.include = _.contains = function(obj, target) {
- var found = false;
- if (obj == null) return found;
- if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1;
- found = any(obj, function(value) {
- return value === target;
- });
- return found;
- };
-
- // Invoke a method (with arguments) on every item in a collection.
- _.invoke = function(obj, method) {
- var args = slice.call(arguments, 2);
- return _.map(obj, function(value) {
- return (_.isFunction(method) ? method || value : value[method]).apply(value, args);
- });
- };
-
- // Convenience version of a common use case of `map`: fetching a property.
- _.pluck = function(obj, key) {
- return _.map(obj, function(value){ return value[key]; });
- };
-
- // Return the maximum element or (element-based computation).
- _.max = function(obj, iterator, context) {
- if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
- if (!iterator && _.isEmpty(obj)) return -Infinity;
- var result = {computed : -Infinity};
- each(obj, function(value, index, list) {
- var computed = iterator ? iterator.call(context, value, index, list) : value;
- computed >= result.computed && (result = {value : value, computed : computed});
- });
- return result.value;
- };
-
- // Return the minimum element (or element-based computation).
- _.min = function(obj, iterator, context) {
- if (!iterator && _.isArray(obj)) return Math.min.apply(Math, obj);
- if (!iterator && _.isEmpty(obj)) return Infinity;
- var result = {computed : Infinity};
- each(obj, function(value, index, list) {
- var computed = iterator ? iterator.call(context, value, index, list) : value;
- computed < result.computed && (result = {value : value, computed : computed});
- });
- return result.value;
- };
-
- // Shuffle an array.
- _.shuffle = function(obj) {
- var shuffled = [], rand;
- each(obj, function(value, index, list) {
- if (index == 0) {
- shuffled[0] = value;
- } else {
- rand = Math.floor(Math.random() * (index + 1));
- shuffled[index] = shuffled[rand];
- shuffled[rand] = value;
- }
- });
- return shuffled;
- };
-
- // Sort the object's values by a criterion produced by an iterator.
- _.sortBy = function(obj, iterator, context) {
- return _.pluck(_.map(obj, function(value, index, list) {
- return {
- value : value,
- criteria : iterator.call(context, value, index, list)
- };
- }).sort(function(left, right) {
- var a = left.criteria, b = right.criteria;
- return a < b ? -1 : a > b ? 1 : 0;
- }), 'value');
- };
-
- // Groups the object's values by a criterion. Pass either a string attribute
- // to group by, or a function that returns the criterion.
- _.groupBy = function(obj, val) {
- var result = {};
- var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; };
- each(obj, function(value, index) {
- var key = iterator(value, index);
- (result[key] || (result[key] = [])).push(value);
- });
- return result;
- };
-
- // Use a comparator function to figure out at what index an object should
- // be inserted so as to maintain order. Uses binary search.
- _.sortedIndex = function(array, obj, iterator) {
- iterator || (iterator = _.identity);
- var low = 0, high = array.length;
- while (low < high) {
- var mid = (low + high) >> 1;
- iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid;
- }
- return low;
- };
-
- // Safely convert anything iterable into a real, live array.
- _.toArray = function(iterable) {
- if (!iterable) return [];
- if (iterable.toArray) return iterable.toArray();
- if (_.isArray(iterable)) return slice.call(iterable);
- if (_.isArguments(iterable)) return slice.call(iterable);
- return _.values(iterable);
- };
-
- // Return the number of elements in an object.
- _.size = function(obj) {
- return _.toArray(obj).length;
- };
-
- // Array Functions
- // ---------------
-
- // Get the first element of an array. Passing **n** will return the first N
- // values in the array. Aliased as `head`. The **guard** check allows it to work
- // with `_.map`.
- _.first = _.head = function(array, n, guard) {
- return (n != null) && !guard ? slice.call(array, 0, n) : array[0];
- };
-
- // Returns everything but the last entry of the array. Especcialy useful on
- // the arguments object. Passing **n** will return all the values in
- // the array, excluding the last N. The **guard** check allows it to work with
- // `_.map`.
- _.initial = function(array, n, guard) {
- return slice.call(array, 0, array.length - ((n == null) || guard ? 1 : n));
- };
-
- // Get the last element of an array. Passing **n** will return the last N
- // values in the array. The **guard** check allows it to work with `_.map`.
- _.last = function(array, n, guard) {
- if ((n != null) && !guard) {
- return slice.call(array, Math.max(array.length - n, 0));
- } else {
- return array[array.length - 1];
- }
- };
-
- // Returns everything but the first entry of the array. Aliased as `tail`.
- // Especially useful on the arguments object. Passing an **index** will return
- // the rest of the values in the array from that index onward. The **guard**
- // check allows it to work with `_.map`.
- _.rest = _.tail = function(array, index, guard) {
- return slice.call(array, (index == null) || guard ? 1 : index);
- };
-
- // Trim out all falsy values from an array.
- _.compact = function(array) {
- return _.filter(array, function(value){ return !!value; });
- };
-
- // Return a completely flattened version of an array.
- _.flatten = function(array, shallow) {
- return _.reduce(array, function(memo, value) {
- if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value));
- memo[memo.length] = value;
- return memo;
- }, []);
- };
-
- // Return a version of the array that does not contain the specified value(s).
- _.without = function(array) {
- return _.difference(array, slice.call(arguments, 1));
- };
-
- // Produce a duplicate-free version of the array. If the array has already
- // been sorted, you have the option of using a faster algorithm.
- // Aliased as `unique`.
- _.uniq = _.unique = function(array, isSorted, iterator) {
- var initial = iterator ? _.map(array, iterator) : array;
- var result = [];
- _.reduce(initial, function(memo, el, i) {
- if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) {
- memo[memo.length] = el;
- result[result.length] = array[i];
- }
- return memo;
- }, []);
- return result;
- };
-
- // Produce an array that contains the union: each distinct element from all of
- // the passed-in arrays.
- _.union = function() {
- return _.uniq(_.flatten(arguments, true));
- };
-
- // Produce an array that contains every item shared between all the
- // passed-in arrays. (Aliased as "intersect" for back-compat.)
- _.intersection = _.intersect = function(array) {
- var rest = slice.call(arguments, 1);
- return _.filter(_.uniq(array), function(item) {
- return _.every(rest, function(other) {
- return _.indexOf(other, item) >= 0;
- });
- });
- };
-
- // Take the difference between one array and a number of other arrays.
- // Only the elements present in just the first array will remain.
- _.difference = function(array) {
- var rest = _.flatten(slice.call(arguments, 1));
- return _.filter(array, function(value){ return !_.include(rest, value); });
- };
-
- // Zip together multiple lists into a single array -- elements that share
- // an index go together.
- _.zip = function() {
- var args = slice.call(arguments);
- var length = _.max(_.pluck(args, 'length'));
- var results = new Array(length);
- for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i);
- return results;
- };
-
- // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**),
- // we need this function. Return the position of the first occurrence of an
- // item in an array, or -1 if the item is not included in the array.
- // Delegates to **ECMAScript 5**'s native `indexOf` if available.
- // If the array is large and already in sort order, pass `true`
- // for **isSorted** to use binary search.
- _.indexOf = function(array, item, isSorted) {
- if (array == null) return -1;
- var i, l;
- if (isSorted) {
- i = _.sortedIndex(array, item);
- return array[i] === item ? i : -1;
- }
- if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item);
- for (i = 0, l = array.length; i < l; i++) if (i in array && array[i] === item) return i;
- return -1;
- };
-
- // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available.
- _.lastIndexOf = function(array, item) {
- if (array == null) return -1;
- if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item);
- var i = array.length;
- while (i--) if (i in array && array[i] === item) return i;
- return -1;
- };
-
- // Generate an integer Array containing an arithmetic progression. A port of
- // the native Python `range()` function. See
- // [the Python documentation](http://docs.python.org/library/functions.html#range).
- _.range = function(start, stop, step) {
- if (arguments.length <= 1) {
- stop = start || 0;
- start = 0;
- }
- step = arguments[2] || 1;
-
- var len = Math.max(Math.ceil((stop - start) / step), 0);
- var idx = 0;
- var range = new Array(len);
-
- while(idx < len) {
- range[idx++] = start;
- start += step;
- }
-
- return range;
- };
-
- // Function (ahem) Functions
- // ------------------
-
- // Reusable constructor function for prototype setting.
- var ctor = function(){};
-
- // Create a function bound to a given object (assigning `this`, and arguments,
- // optionally). Binding with arguments is also known as `curry`.
- // Delegates to **ECMAScript 5**'s native `Function.bind` if available.
- // We check for `func.bind` first, to fail fast when `func` is undefined.
- _.bind = function bind(func, context) {
- var bound, args;
- if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1));
- if (!_.isFunction(func)) throw new TypeError;
- args = slice.call(arguments, 2);
- return bound = function() {
- if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
- ctor.prototype = func.prototype;
- var self = new ctor;
- var result = func.apply(self, args.concat(slice.call(arguments)));
- if (Object(result) === result) return result;
- return self;
- };
- };
-
- // Bind all of an object's methods to that object. Useful for ensuring that
- // all callbacks defined on an object belong to it.
- _.bindAll = function(obj) {
- var funcs = slice.call(arguments, 1);
- if (funcs.length == 0) funcs = _.functions(obj);
- each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
- return obj;
- };
-
- // Memoize an expensive function by storing its results.
- _.memoize = function(func, hasher) {
- var memo = {};
- hasher || (hasher = _.identity);
- return function() {
- var key = hasher.apply(this, arguments);
- return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments));
- };
- };
-
- // Delays a function for the given number of milliseconds, and then calls
- // it with the arguments supplied.
- _.delay = function(func, wait) {
- var args = slice.call(arguments, 2);
- return setTimeout(function(){ return func.apply(func, args); }, wait);
- };
-
- // Defers a function, scheduling it to run after the current call stack has
- // cleared.
- _.defer = function(func) {
- return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1)));
- };
-
- // Returns a function, that, when invoked, will only be triggered at most once
- // during a given window of time.
- _.throttle = function(func, wait) {
- var context, args, timeout, throttling, more;
- var whenDone = _.debounce(function(){ more = throttling = false; }, wait);
- return function() {
- context = this; args = arguments;
- var later = function() {
- timeout = null;
- if (more) func.apply(context, args);
- whenDone();
- };
- if (!timeout) timeout = setTimeout(later, wait);
- if (throttling) {
- more = true;
- } else {
- func.apply(context, args);
- }
- whenDone();
- throttling = true;
- };
- };
-
- // Returns a function, that, as long as it continues to be invoked, will not
- // be triggered. The function will be called after it stops being called for
- // N milliseconds.
- _.debounce = function(func, wait) {
- var timeout;
- return function() {
- var context = this, args = arguments;
- var later = function() {
- timeout = null;
- func.apply(context, args);
- };
- clearTimeout(timeout);
- timeout = setTimeout(later, wait);
- };
- };
-
- // Returns a function that will be executed at most one time, no matter how
- // often you call it. Useful for lazy initialization.
- _.once = function(func) {
- var ran = false, memo;
- return function() {
- if (ran) return memo;
- ran = true;
- return memo = func.apply(this, arguments);
- };
- };
-
- // Returns the first function passed as an argument to the second,
- // allowing you to adjust arguments, run code before and after, and
- // conditionally execute the original function.
- _.wrap = function(func, wrapper) {
- return function() {
- var args = [func].concat(slice.call(arguments, 0));
- return wrapper.apply(this, args);
- };
- };
-
- // Returns a function that is the composition of a list of functions, each
- // consuming the return value of the function that follows.
- _.compose = function() {
- var funcs = arguments;
- return function() {
- var args = arguments;
- for (var i = funcs.length - 1; i >= 0; i--) {
- args = [funcs[i].apply(this, args)];
- }
- return args[0];
- };
- };
-
- // Returns a function that will only be executed after being called N times.
- _.after = function(times, func) {
- if (times <= 0) return func();
- return function() {
- if (--times < 1) { return func.apply(this, arguments); }
- };
- };
-
- // Object Functions
- // ----------------
-
- // Retrieve the names of an object's properties.
- // Delegates to **ECMAScript 5**'s native `Object.keys`
- _.keys = nativeKeys || function(obj) {
- if (obj !== Object(obj)) throw new TypeError('Invalid object');
- var keys = [];
- for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key;
- return keys;
- };
-
- // Retrieve the values of an object's properties.
- _.values = function(obj) {
- return _.map(obj, _.identity);
- };
-
- // Return a sorted list of the function names available on the object.
- // Aliased as `methods`
- _.functions = _.methods = function(obj) {
- var names = [];
- for (var key in obj) {
- if (_.isFunction(obj[key])) names.push(key);
- }
- return names.sort();
- };
-
- // Extend a given object with all the properties in passed-in object(s).
- _.extend = function(obj) {
- each(slice.call(arguments, 1), function(source) {
- for (var prop in source) {
- obj[prop] = source[prop];
- }
- });
- return obj;
- };
-
- // Fill in a given object with default properties.
- _.defaults = function(obj) {
- each(slice.call(arguments, 1), function(source) {
- for (var prop in source) {
- if (obj[prop] == null) obj[prop] = source[prop];
- }
- });
- return obj;
- };
-
- // Create a (shallow-cloned) duplicate of an object.
- _.clone = function(obj) {
- if (!_.isObject(obj)) return obj;
- return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
- };
-
- // Invokes interceptor with the obj, and then returns obj.
- // The primary purpose of this method is to "tap into" a method chain, in
- // order to perform operations on intermediate results within the chain.
- _.tap = function(obj, interceptor) {
- interceptor(obj);
- return obj;
- };
-
- // Internal recursive comparison function.
- function eq(a, b, stack) {
- // Identical objects are equal. `0 === -0`, but they aren't identical.
- // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal.
- if (a === b) return a !== 0 || 1 / a == 1 / b;
- // A strict comparison is necessary because `null == undefined`.
- if (a == null || b == null) return a === b;
- // Unwrap any wrapped objects.
- if (a._chain) a = a._wrapped;
- if (b._chain) b = b._wrapped;
- // Invoke a custom `isEqual` method if one is provided.
- if (a.isEqual && _.isFunction(a.isEqual)) return a.isEqual(b);
- if (b.isEqual && _.isFunction(b.isEqual)) return b.isEqual(a);
- // Compare `[[Class]]` names.
- var className = toString.call(a);
- if (className != toString.call(b)) return false;
- switch (className) {
- // Strings, numbers, dates, and booleans are compared by value.
- case '[object String]':
- // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
- // equivalent to `new String("5")`.
- return a == String(b);
- case '[object Number]':
- // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
- // other numeric values.
- return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b);
- case '[object Date]':
- case '[object Boolean]':
- // Coerce dates and booleans to numeric primitive values. Dates are compared by their
- // millisecond representations. Note that invalid dates with millisecond representations
- // of `NaN` are not equivalent.
- return +a == +b;
- // RegExps are compared by their source patterns and flags.
- case '[object RegExp]':
- return a.source == b.source &&
- a.global == b.global &&
- a.multiline == b.multiline &&
- a.ignoreCase == b.ignoreCase;
- }
- if (typeof a != 'object' || typeof b != 'object') return false;
- // Assume equality for cyclic structures. The algorithm for detecting cyclic
- // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
- var length = stack.length;
- while (length--) {
- // Linear search. Performance is inversely proportional to the number of
- // unique nested structures.
- if (stack[length] == a) return true;
- }
- // Add the first object to the stack of traversed objects.
- stack.push(a);
- var size = 0, result = true;
- // Recursively compare objects and arrays.
- if (className == '[object Array]') {
- // Compare array lengths to determine if a deep comparison is necessary.
- size = a.length;
- result = size == b.length;
- if (result) {
- // Deep compare the contents, ignoring non-numeric properties.
- while (size--) {
- // Ensure commutative equality for sparse arrays.
- if (!(result = size in a == size in b && eq(a[size], b[size], stack))) break;
- }
- }
- } else {
- // Objects with different constructors are not equivalent.
- if ('constructor' in a != 'constructor' in b || a.constructor != b.constructor) return false;
- // Deep compare objects.
- for (var key in a) {
- if (_.has(a, key)) {
- // Count the expected number of properties.
- size++;
- // Deep compare each member.
- if (!(result = _.has(b, key) && eq(a[key], b[key], stack))) break;
- }
- }
- // Ensure that both objects contain the same number of properties.
- if (result) {
- for (key in b) {
- if (_.has(b, key) && !(size--)) break;
- }
- result = !size;
- }
- }
- // Remove the first object from the stack of traversed objects.
- stack.pop();
- return result;
- }
-
- // Perform a deep comparison to check if two objects are equal.
- _.isEqual = function(a, b) {
- return eq(a, b, []);
- };
-
- // Is a given array, string, or object empty?
- // An "empty" object has no enumerable own-properties.
- _.isEmpty = function(obj) {
- if (_.isArray(obj) || _.isString(obj)) return obj.length === 0;
- for (var key in obj) if (_.has(obj, key)) return false;
- return true;
- };
-
- // Is a given value a DOM element?
- _.isElement = function(obj) {
- return !!(obj && obj.nodeType == 1);
- };
-
- // Is a given value an array?
- // Delegates to ECMA5's native Array.isArray
- _.isArray = nativeIsArray || function(obj) {
- return toString.call(obj) == '[object Array]';
- };
-
- // Is a given variable an object?
- _.isObject = function(obj) {
- return obj === Object(obj);
- };
-
- // Is a given variable an arguments object?
- _.isArguments = function(obj) {
- return toString.call(obj) == '[object Arguments]';
- };
- if (!_.isArguments(arguments)) {
- _.isArguments = function(obj) {
- return !!(obj && _.has(obj, 'callee'));
- };
- }
-
- // Is a given value a function?
- _.isFunction = function(obj) {
- return toString.call(obj) == '[object Function]';
- };
-
- // Is a given value a string?
- _.isString = function(obj) {
- return toString.call(obj) == '[object String]';
- };
-
- // Is a given value a number?
- _.isNumber = function(obj) {
- return toString.call(obj) == '[object Number]';
- };
-
- // Is the given value `NaN`?
- _.isNaN = function(obj) {
- // `NaN` is the only value for which `===` is not reflexive.
- return obj !== obj;
- };
-
- // Is a given value a boolean?
- _.isBoolean = function(obj) {
- return obj === true || obj === false || toString.call(obj) == '[object Boolean]';
- };
-
- // Is a given value a date?
- _.isDate = function(obj) {
- return toString.call(obj) == '[object Date]';
- };
-
- // Is the given value a regular expression?
- _.isRegExp = function(obj) {
- return toString.call(obj) == '[object RegExp]';
- };
-
- // Is a given value equal to null?
- _.isNull = function(obj) {
- return obj === null;
- };
-
- // Is a given variable undefined?
- _.isUndefined = function(obj) {
- return obj === void 0;
- };
-
- // Has own property?
- _.has = function(obj, key) {
- return hasOwnProperty.call(obj, key);
- };
-
- // Utility Functions
- // -----------------
-
- // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
- // previous owner. Returns a reference to the Underscore object.
- _.noConflict = function() {
- root._ = previousUnderscore;
- return this;
- };
-
- // Keep the identity function around for default iterators.
- _.identity = function(value) {
- return value;
- };
-
- // Run a function **n** times.
- _.times = function (n, iterator, context) {
- for (var i = 0; i < n; i++) iterator.call(context, i);
- };
-
- // Escape a string for HTML interpolation.
- _.escape = function(string) {
- return (''+string).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;').replace(/'/g, '&#x27;').replace(/\//g,'&#x2F;');
- };
-
- // Add your own custom functions to the Underscore object, ensuring that
- // they're correctly added to the OOP wrapper as well.
- _.mixin = function(obj) {
- each(_.functions(obj), function(name){
- addToWrapper(name, _[name] = obj[name]);
- });
- };
-
- // Generate a unique integer id (unique within the entire client session).
- // Useful for temporary DOM ids.
- var idCounter = 0;
- _.uniqueId = function(prefix) {
- var id = idCounter++;
- return prefix ? prefix + id : id;
- };
-
- // By default, Underscore uses ERB-style template delimiters, change the
- // following template settings to use alternative delimiters.
- _.templateSettings = {
- evaluate : /<%([\s\S]+?)%>/g,
- interpolate : /<%=([\s\S]+?)%>/g,
- escape : /<%-([\s\S]+?)%>/g
- };
-
- // When customizing `templateSettings`, if you don't want to define an
- // interpolation, evaluation or escaping regex, we need one that is
- // guaranteed not to match.
- var noMatch = /.^/;
-
- // Within an interpolation, evaluation, or escaping, remove HTML escaping
- // that had been previously added.
- var unescape = function(code) {
- return code.replace(/\\\\/g, '\\').replace(/\\'/g, "'");
- };
-
- // JavaScript micro-templating, similar to John Resig's implementation.
- // Underscore templating handles arbitrary delimiters, preserves whitespace,
- // and correctly escapes quotes within interpolated code.
- _.template = function(str, data) {
- var c = _.templateSettings;
- var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
- 'with(obj||{}){__p.push(\'' +
- str.replace(/\\/g, '\\\\')
- .replace(/'/g, "\\'")
- .replace(c.escape || noMatch, function(match, code) {
- return "',_.escape(" + unescape(code) + "),'";
- })
- .replace(c.interpolate || noMatch, function(match, code) {
- return "'," + unescape(code) + ",'";
- })
- .replace(c.evaluate || noMatch, function(match, code) {
- return "');" + unescape(code).replace(/[\r\n\t]/g, ' ') + ";__p.push('";
- })
- .replace(/\r/g, '\\r')
- .replace(/\n/g, '\\n')
- .replace(/\t/g, '\\t')
- + "');}return __p.join('');";
- var func = new Function('obj', '_', tmpl);
- if (data) return func(data, _);
- return function(data) {
- return func.call(this, data, _);
- };
- };
-
- // Add a "chain" function, which will delegate to the wrapper.
- _.chain = function(obj) {
- return _(obj).chain();
- };
-
- // The OOP Wrapper
- // ---------------
-
- // If Underscore is called as a function, it returns a wrapped object that
- // can be used OO-style. This wrapper holds altered versions of all the
- // underscore functions. Wrapped objects may be chained.
- var wrapper = function(obj) { this._wrapped = obj; };
-
- // Expose `wrapper.prototype` as `_.prototype`
- _.prototype = wrapper.prototype;
-
- // Helper function to continue chaining intermediate results.
- var result = function(obj, chain) {
- return chain ? _(obj).chain() : obj;
- };
-
- // A method to easily add functions to the OOP wrapper.
- var addToWrapper = function(name, func) {
- wrapper.prototype[name] = function() {
- var args = slice.call(arguments);
- unshift.call(args, this._wrapped);
- return result(func.apply(_, args), this._chain);
- };
- };
-
- // Add all of the Underscore functions to the wrapper object.
- _.mixin(_);
-
- // Add all mutator Array functions to the wrapper.
- each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
- var method = ArrayProto[name];
- wrapper.prototype[name] = function() {
- var wrapped = this._wrapped;
- method.apply(wrapped, arguments);
- var length = wrapped.length;
- if ((name == 'shift' || name == 'splice') && length === 0) delete wrapped[0];
- return result(wrapped, this._chain);
- };
- });
-
- // Add all accessor Array functions to the wrapper.
- each(['concat', 'join', 'slice'], function(name) {
- var method = ArrayProto[name];
- wrapper.prototype[name] = function() {
- return result(method.apply(this._wrapped, arguments), this._chain);
- };
- });
-
- // Start chaining a wrapped Underscore object.
- wrapper.prototype.chain = function() {
- this._chain = true;
- return this;
- };
-
- // Extracts the result from a wrapped and chained object.
- wrapper.prototype.value = function() {
- return this._wrapped;
- };
-
-}).call(this);
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-05-25 18:53:34 +0200