From c9c176a53b1632ca2b1c6ed27382ab72ac21d45d Mon Sep 17 00:00:00 2001
From: Adam Abrons
Date: Tue, 5 Jan 2010 16:36:58 -0800
Subject: angular.js

---
 lib/underscore/underscore.js | 609 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 609 insertions(+)
 create mode 100644 lib/underscore/underscore.js

(limited to 'lib/underscore/underscore.js')

diff --git a/lib/underscore/underscore.js b/lib/underscore/underscore.js
new file mode 100644
index 00000000..047f01c5
--- /dev/null
+++ b/lib/underscore/underscore.js
@@ -0,0 +1,609 @@
+// Underscore.js
+// (c) 2009 Jeremy Ashkenas, DocumentCloud Inc.
+// Underscore is freely distributable under the terms of the MIT license.
+// Portions of Underscore are inspired by or borrowed from Prototype.js,
+// 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._;
+
+  // 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; };
+
+  // Establish the object that gets thrown to break out of a loop iteration.
+  var breaker = typeof StopIteration !== 'undefined' ? StopIteration : '__break__';
+
+  // Create a safe reference to the Underscore object for reference below.
+  var _ = root._ = function(obj) { return new wrapper(obj); };
+
+  // Export the Underscore object for CommonJS.
+  if (typeof exports !== 'undefined') exports._ = _;
+
+  // Create quick reference variables for speed access to core prototypes.
+  var slice                 = Array.prototype.slice,
+      unshift               = Array.prototype.unshift,
+      toString              = Object.prototype.toString,
+      hasOwnProperty        = Object.prototype.hasOwnProperty,
+      propertyIsEnumerable  = Object.prototype.propertyIsEnumerable;
+
+  // Current version.
+  _.VERSION = '0.5.1';
+
+  /*------------------------ Collection Functions: ---------------------------*/
+
+  // The cornerstone, an each implementation.
+  // Handles objects implementing forEach, arrays, and raw objects.
+  _.each = function(obj, iterator, context) {
+    var index = 0;
+    try {
+      if (obj.forEach) {
+        obj.forEach(iterator, context);
+      } else if (_.isArray(obj) || _.isArguments(obj)) {
+        for (var i=0, l=obj.length; i<l; i++) iterator.call(context, obj[i], i, obj);
+      } else {
+        var keys = _.keys(obj), l = keys.length;
+        for (var i=0; i<l; i++) iterator.call(context, obj[keys[i]], keys[i], obj);
+      }
+    } catch(e) {
+      if (e != breaker) throw e;
+    }
+    return obj;
+  };
+
+  // Return the results of applying the iterator to each element. Use JavaScript
+  // 1.6's version of map, if possible.
+  _.map = function(obj, iterator, context) {
+    if (obj && _.isFunction(obj.map)) return obj.map(iterator, context);
+    var results = [];
+    _.each(obj, function(value, index, list) {
+      results.push(iterator.call(context, value, index, list));
+    });
+    return results;
+  };
+
+  // Reduce builds up a single result from a list of values. Also known as
+  // inject, or foldl. Uses JavaScript 1.8's version of reduce, if possible.
+  _.reduce = function(obj, memo, iterator, context) {
+    if (obj && _.isFunction(obj.reduce)) return obj.reduce(_.bind(iterator, context), memo);
+    _.each(obj, function(value, index, list) {
+      memo = iterator.call(context, memo, value, index, list);
+    });
+    return memo;
+  };
+
+  // The right-associative version of reduce, also known as foldr. Uses
+  // JavaScript 1.8's version of reduceRight, if available.
+  _.reduceRight = function(obj, memo, iterator, context) {
+    if (obj && _.isFunction(obj.reduceRight)) return obj.reduceRight(_.bind(iterator, context), memo);
+    var reversed = _.clone(_.toArray(obj)).reverse();
+    _.each(reversed, function(value, index) {
+      memo = iterator.call(context, memo, value, index, obj);
+    });
+    return memo;
+  };
+
+  // Return the first value which passes a truth test.
+  _.detect = function(obj, iterator, context) {
+    var result;
+    _.each(obj, function(value, index, list) {
+      if (iterator.call(context, value, index, list)) {
+        result = value;
+        _.breakLoop();
+      }
+    });
+    return result;
+  };
+
+  // Return all the elements that pass a truth test. Use JavaScript 1.6's
+  // filter(), if it exists.
+  _.select = function(obj, iterator, context) {
+    if (obj && _.isFunction(obj.filter)) return obj.filter(iterator, context);
+    var results = [];
+    _.each(obj, function(value, index, list) {
+      iterator.call(context, value, index, list) && results.push(value);
+    });
+    return results;
+  };
+
+  // Return all the elements for which a truth test fails.
+  _.reject = function(obj, iterator, context) {
+    var results = [];
+    _.each(obj, function(value, index, list) {
+      !iterator.call(context, value, index, list) && results.push(value);
+    });
+    return results;
+  };
+
+  // Determine whether all of the elements match a truth test. Delegate to
+  // JavaScript 1.6's every(), if it is present.
+  _.all = function(obj, iterator, context) {
+    iterator = iterator || _.identity;
+    if (obj && _.isFunction(obj.every)) return obj.every(iterator, context);
+    var result = true;
+    _.each(obj, function(value, index, list) {
+      if (!(result = result && iterator.call(context, value, index, list))) _.breakLoop();
+    });
+    return result;
+  };
+
+  // Determine if at least one element in the object matches a truth test. Use
+  // JavaScript 1.6's some(), if it exists.
+  _.any = function(obj, iterator, context) {
+    iterator = iterator || _.identity;
+    if (obj && _.isFunction(obj.some)) return obj.some(iterator, context);
+    var result = false;
+    _.each(obj, function(value, index, list) {
+      if (result = iterator.call(context, value, index, list)) _.breakLoop();
+    });
+    return result;
+  };
+
+  // Determine if a given value is included in the array or object,
+  // based on '==='.
+  _.include = function(obj, target) {
+    if (_.isArray(obj)) return _.indexOf(obj, target) != -1;
+    var found = false;
+    _.each(obj, function(value) {
+      if (found = value === target) _.breakLoop();
+    });
+    return found;
+  };
+
+  // Invoke a method with arguments on every item in a collection.
+  _.invoke = function(obj, method) {
+    var args = _.rest(arguments, 2);
+    return _.map(obj, function(value) {
+      return (method ? value[method] : value).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 item or (item-based computation).
+  _.max = function(obj, iterator, context) {
+    if (!iterator && _.isArray(obj)) return Math.max.apply(Math, obj);
+    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);
+    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;
+  };
+
+  // Sort the object's values by a criteria 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');
+  };
+
+  // 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;
+  };
+
+  // Convert anything iterable into a real, live array.
+  _.toArray = function(iterable) {
+    if (!iterable)                return [];
+    if (iterable.toArray)         return iterable.toArray();
+    if (_.isArray(iterable))      return iterable;
+    if (_.isArguments(iterable))  return slice.call(iterable);
+    return _.map(iterable, function(val){ return val; });
+  };
+
+  // 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 = function(array, n, guard) {
+    return n && !guard ? slice.call(array, 0, n) : array[0];
+  };
+
+  // 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 = function(array, index, guard) {
+    return slice.call(array, _.isUndefined(index) || guard ? 1 : index);
+  };
+
+  // Get the last element of an array.
+  _.last = function(array) {
+    return array[array.length - 1];
+  };
+
+  // Trim out all falsy values from an array.
+  _.compact = function(array) {
+    return _.select(array, function(value){ return !!value; });
+  };
+
+  // Return a completely flattened version of an array.
+  _.flatten = function(array) {
+    return _.reduce(array, [], function(memo, value) {
+      if (_.isArray(value)) return memo.concat(_.flatten(value));
+      memo.push(value);
+      return memo;
+    });
+  };
+
+  // Return a version of the array that does not contain the specified value(s).
+  _.without = function(array) {
+    var values = _.rest(arguments);
+    return _.select(array, function(value){ return !_.include(values, value); });
+  };
+
+  // Produce a duplicate-free version of the array. If the array has already
+  // been sorted, you have the option of using a faster algorithm.
+  _.uniq = function(array, isSorted) {
+    return _.reduce(array, [], function(memo, el, i) {
+      if (0 == i || (isSorted === true ? _.last(memo) != el : !_.include(memo, el))) memo.push(el);
+      return memo;
+    });
+  };
+
+  // Produce an array that contains every item shared between all the
+  // passed-in arrays.
+  _.intersect = function(array) {
+    var rest = _.rest(arguments);
+    return _.select(_.uniq(array), function(item) {
+      return _.all(rest, function(other) {
+        return _.indexOf(other, item) >= 0;
+      });
+    });
+  };
+
+  // Zip together multiple lists into a single array -- elements that share
+  // an index go together.
+  _.zip = function() {
+    var args = _.toArray(arguments);
+    var length = _.max(_.pluck(args, 'length'));
+    var results = new Array(length);
+    for (var i=0; i<length; i++) results[i] = _.pluck(args, String(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 occurence of an
+  // item in an array, or -1 if the item is not included in the array.
+  _.indexOf = function(array, item) {
+    if (array.indexOf) return array.indexOf(item);
+    for (var i=0, l=array.length; i<l; i++) if (array[i] === item) return i;
+    return -1;
+  };
+
+  // Provide JavaScript 1.6's lastIndexOf, delegating to the native function,
+  // if possible.
+  _.lastIndexOf = function(array, item) {
+    if (array.lastIndexOf) return array.lastIndexOf(item);
+    var i = array.length;
+    while (i--) if (array[i] === item) return i;
+    return -1;
+  };
+
+  // Generate an integer Array containing an arithmetic progression. A port of
+  // the native Python range() function. See:
+  // http://docs.python.org/library/functions.html#range
+  _.range = function(start, stop, step) {
+    var a     = _.toArray(arguments);
+    var solo  = a.length <= 1;
+    var start = solo ? 0 : a[0], stop = solo ? a[0] : a[1], step = a[2] || 1;
+    var len   = Math.ceil((stop - start) / step);
+    if (len <= 0) return [];
+    var range = new Array(len);
+    for (var i = start, idx = 0; true; i += step) {
+      if ((step > 0 ? i - stop : stop - i) >= 0) return range;
+      range[idx++] = i;
+    }
+  };
+
+  /* ----------------------- Function Functions: -----------------------------*/
+
+  // Create a function bound to a given object (assigning 'this', and arguments,
+  // optionally). Binding with arguments is also known as 'curry'.
+  _.bind = function(func, obj) {
+    var args = _.rest(arguments, 2);
+    return function() {
+      return func.apply(obj || root, args.concat(_.toArray(arguments)));
+    };
+  };
+
+  // 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 = _.rest(arguments);
+    if (funcs.length == 0) funcs = _.functions(obj);
+    _.each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); });
+    return obj;
+  };
+
+  // Delays a function for the given number of milliseconds, and then calls
+  // it with the arguments supplied.
+  _.delay = function(func, wait) {
+    var args = _.rest(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(_.rest(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(_.toArray(arguments));
+      return wrapper.apply(wrapper, 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 = _.toArray(arguments);
+    return function() {
+      var args = _.toArray(arguments);
+      for (var i=funcs.length-1; i >= 0; i--) {
+        args = [funcs[i].apply(this, args)];
+      }
+      return args[0];
+    };
+  };
+
+  /* ------------------------- Object Functions: ---------------------------- */
+
+  // Retrieve the names of an object's properties.
+  _.keys = function(obj) {
+    if(_.isArray(obj)) return _.range(0, obj.length);
+    var keys = [];
+    for (var key in obj) if (hasOwnProperty.call(obj, key)) keys.push(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 in Underscore.
+  _.functions = function(obj) {
+    return _.select(_.keys(obj), function(key){ return _.isFunction(obj[key]); }).sort();
+  };
+
+  // Extend a given object with all of the properties in a source object.
+  _.extend = function(destination, source) {
+    for (var property in source) destination[property] = source[property];
+    return destination;
+  };
+
+  // Create a (shallow-cloned) duplicate of an object.
+  _.clone = function(obj) {
+    if (_.isArray(obj)) return obj.slice(0);
+    return _.extend({}, obj);
+  };
+
+  // Perform a deep comparison to check if two objects are equal.
+  _.isEqual = function(a, b) {
+    // Check object identity.
+    if (a === b) return true;
+    // Different types?
+    var atype = typeof(a), btype = typeof(b);
+    if (atype != btype) return false;
+    // Basic equality test (watch out for coercions).
+    if (a == b) return true;
+    // One is falsy and the other truthy.
+    if ((!a && b) || (a && !b)) return false;
+    // One of them implements an isEqual()?
+    if (a.isEqual) return a.isEqual(b);
+    // Check dates' integer values.
+    if (_.isDate(a) && _.isDate(b)) return a.getTime() === b.getTime();
+    // Both are NaN?
+    if (_.isNaN(a) && _.isNaN(b)) return true;
+    // Compare regular expressions.
+    if (_.isRegExp(a) && _.isRegExp(b))
+      return a.source     === b.source &&
+             a.global     === b.global &&
+             a.ignoreCase === b.ignoreCase &&
+             a.multiline  === b.multiline;
+    // If a is not an object by this point, we can't handle it.
+    if (atype !== 'object') return false;
+    // Check for different array lengths before comparing contents.
+    if (a.length && (a.length !== b.length)) return false;
+    // Nothing else worked, deep compare the contents.
+    var aKeys = _.keys(a), bKeys = _.keys(b);
+    // Different object sizes?
+    if (aKeys.length != bKeys.length) return false;
+    // Recursive comparison of contents.
+    for (var key in a) if (!_.isEqual(a[key], b[key])) return false;
+    return true;
+  };
+
+  // Is a given array or object empty?
+  _.isEmpty = function(obj) {
+    return _.keys(obj).length == 0;
+  };
+
+  // Is a given value a DOM element?
+  _.isElement = function(obj) {
+    return !!(obj && obj.nodeType == 1);
+  };
+
+  // Is a given variable an arguments object?
+  _.isArguments = function(obj) {
+    return obj && _.isNumber(obj.length) && !_.isArray(obj) && !propertyIsEnumerable.call(obj, 'length');
+  };
+
+  // Is the given value NaN -- this one is interesting. NaN != NaN, and
+  // isNaN(undefined) == true, so we make sure it's a number first.
+  _.isNaN = function(obj) {
+    return _.isNumber(obj) && isNaN(obj);
+  };
+
+  // Is a given value equal to null?
+  _.isNull = function(obj) {
+    return obj === null;
+  };
+
+  // Is a given variable undefined?
+  _.isUndefined = function(obj) {
+    return typeof obj == 'undefined';
+  };
+
+  // Define the isArray, isDate, isFunction, isNumber, isRegExp, and isString
+  // functions based on their toString identifiers.
+  var types = ['Array', 'Date', 'Function', 'Number', 'RegExp', 'String'];
+  for (var i=0, l=types.length; i<l; i++) {
+    (function() {
+      var identifier = '[object ' + types[i] + ']';
+      _['is' + types[i]] = function(obj) { return toString.call(obj) == identifier; };
+    })();
+  }
+
+  /* -------------------------- 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;
+  };
+
+  // Break out of the middle of an iteration.
+  _.breakLoop = function() {
+    throw breaker;
+  };
+
+  // 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;
+  };
+
+  // JavaScript templating a-la ERB, pilfered from John Resig's
+  // "Secrets of the JavaScript Ninja", page 83.
+  _.template = function(str, data) {
+    var fn = new Function('obj',
+      'var p=[],print=function(){p.push.apply(p,arguments);};' +
+      'with(obj){p.push(\'' +
+      str
+        .replace(/[\r\t\n]/g, " ")
+        .split("<%").join("\t")
+        .replace(/((^|%>)[^\t]*)'/g, "$1\r")
+        .replace(/\t=(.*?)%>/g, "',$1,'")
+        .split("\t").join("');")
+        .split("%>").join("p.push('")
+        .split("\r").join("\\'")
+    + "');}return p.join('');");
+    return data ? fn(data) : fn;
+  };
+
+  /*------------------------------- Aliases ----------------------------------*/
+
+  _.forEach  = _.each;
+  _.foldl    = _.inject       = _.reduce;
+  _.foldr    = _.reduceRight;
+  _.filter   = _.select;
+  _.every    = _.all;
+  _.some     = _.any;
+  _.head     = _.first;
+  _.tail     = _.rest;
+  _.methods  = _.functions;
+
+  /*------------------------ Setup the OOP Wrapper: --------------------------*/
+
+  // Helper function to continue chaining intermediate results.
+  var result = function(obj, chain) {
+    return chain ? _(obj).chain() : obj;
+  };
+
+  // Add all of the Underscore functions to the wrapper object.
+  _.each(_.functions(_), function(name) {
+    var method = _[name];
+    wrapper.prototype[name] = function() {
+      unshift.call(arguments, this._wrapped);
+      return result(method.apply(_, arguments), this._chain);
+    };
+  });
+
+  // Add all mutator Array functions to the wrapper.
+  _.each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+    var method = Array.prototype[name];
+    wrapper.prototype[name] = function() {
+      method.apply(this._wrapped, arguments);
+      return result(this._wrapped, this._chain);
+    };
+  });
+
+  // Add all accessor Array functions to the wrapper.
+  _.each(['concat', 'join', 'slice'], function(name) {
+    var method = Array.prototype[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;
+  };
+
+})();
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