text: // 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._;
    
    // Create a safe reference to the Underscore object for the functions below.
    var _ = root._ = {};
    
    // Export the Underscore object for CommonJS.
    if (typeof exports !== 'undefined') _ = exports;
    
    // Current version.
    _.VERSION = '0.3.2';
        
    /*------------------------ Collection Functions: ---------------------------*/
      
    // The cornerstone, an each implementation.
    // Handles objects implementing forEach, each, arrays, and raw objects.
    _.each = function(obj, iterator, context) {
      var index = 0;
      try {
        if (obj.forEach) {
          obj.forEach(iterator, context);
        } else if (obj.length) {
          for (var i=0, l = obj.length; i<l; i++) iterator.call(context, obj[i], i, obj);
        } else if (obj.each) {
          obj.each(function(value) { iterator.call(context, value, index++, obj); });
        } else {
          for (var key in obj) if (Object.prototype.hasOwnProperty.call(obj, key)) {
            iterator.call(context, obj[key], key, obj);
          }
        }
      } catch(e) {
        if (e != '__break__') 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 && 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.
    _.reduce = function(obj, memo, iterator, context) {
      _.each(obj, function(value, index, list) {
        memo = iterator.call(context, memo, value, index, list);
      });
      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;
          throw '__break__';
        }
      });
      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.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.every) return obj.every(iterator, context);
      var result = true;
      _.each(obj, function(value, index, list) {
        if (!(result = result && iterator.call(context, value, index, list))) throw '__break__';
      });
      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.some) return obj.some(iterator, context);
      var result = false;
      _.each(obj, function(value, index, list) {
        if (result = iterator.call(context, value, index, list)) throw '__break__';
      });
      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) {
          throw '__break__';
        }
      });
      return found;
    };
    
    // Invoke a method with arguments on every item in a collection.
    _.invoke = function(obj, method) {
      var args = _.toArray(arguments).slice(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 (_.isArray(iterable)) return 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.
    _.first = function(array) {
      return array[0];
    };
    
    // 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 = array.slice.call(arguments, 0);
      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 ? _.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 = _.toArray(arguments).slice(1);
      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 (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;
    };
    
    /* ----------------------- 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, context) {
      if (!context) return func;
      var args = _.toArray(arguments).slice(2);
      return function() {
        var a = args.concat(_.toArray(arguments));
        return func.apply(context, a);
      };
    };
    
    // 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() {
      var args = _.toArray(arguments);
      var context = args.pop();
      _.each(args, function(methodName) {
        context[methodName] = _.bind(context[methodName], context);
      });
    };
    
    // Delays a function for the given number of milliseconds, and then calls
    // it with the arguments supplied.
    _.delay = function(func, wait) {
      var args = _.toArray(arguments).slice(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(_.toArray(arguments).slice(1)));
    };
    
    // 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() {
        for (var i=funcs.length-1; i >= 0; i--) {
          arguments = [funcs[i].apply(this, arguments)];
        }
        return arguments[0];
      };
    };
    
    /* ------------------------- Object Functions: ---------------------------- */
    
    // Retrieve the names of an object's properties.
    _.keys = function(obj) {
      return _.map(obj, function(value, key){ return key; });
    };
    
    // Retrieve the values of an object's properties.
    _.values = function(obj) {
      return _.map(obj, _.identity);
    };
    
    // 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) {
      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 of them implements an isEqual()?
      if (a.isEqual) return a.isEqual(b);
      // If a is not an object by this point, we can't handle it.
      if (atype !== 'object') 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 value a DOM element?
    _.isElement = function(obj) {
      return !!(obj && obj.nodeType == 1);
    };
    
    // Is a given value a real Array?
    _.isArray = function(obj) {
      return Object.prototype.toString.call(obj) == '[object Array]';
    };
    
    // Is a given value a Function?
    _.isFunction = function(obj) {
      return Object.prototype.toString.call(obj) == '[object Function]';
    };
    
    // Is a given variable undefined?
    _.isUndefined = function(obj) {
      return typeof obj == 'undefined';
    };
    
    /* -------------------------- 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;
    };
    
    // Generate a unique integer id (unique within the entire client session).
    // Useful for temporary DOM ids.
    _.uniqueId = function(prefix) {
      var id = this._idCounter = (this._idCounter || 0) + 1;
      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;
    _.inject   = _.reduce;
    _.filter   = _.select;
    _.every    = _.all;
    _.some     = _.any;  
  
  })();
  