underscore.js in rails-backbone-0.5.0

- old
+ new

@@ -53,12 +53,11 @@
   // global object.
   if (typeof module !== 'undefined' && module.exports) {
     module.exports = _;
     _._ = _;
   } else {
-    // Exported as a string, for Closure Compiler "advanced" mode.
-    root['_'] = _;
+    root._ = _;
   }
 
   // Current version.
   _.VERSION = '1.1.6';
 
@@ -72,11 +71,11 @@
     if (obj == null) return;
     if (nativeForEach && obj.forEach === nativeForEach) {
       obj.forEach(iterator, context);
     } else if (_.isNumber(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;
+        if (iterator.call(context, obj[i], i, obj) === breaker) return;
       }
     } else {
       for (var key in obj) {
         if (hasOwnProperty.call(obj, key)) {
           if (iterator.call(context, obj[key], key, obj) === breaker) return;
@@ -250,20 +249,10 @@
       var a = left.criteria, b = right.criteria;
       return a < b ? -1 : a > b ? 1 : 0;
     }), 'value');
   };
 
-  // Groups the object's values by a criterion produced by an iterator
-  _.groupBy = function(obj, iterator) {
-    var result = {};
-    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;
@@ -511,10 +500,10 @@
   // consuming the return value of the function that follows.
   _.compose = function() {
     var funcs = slice.call(arguments);
     return function() {
       var args = slice.call(arguments);
-      for (var i = funcs.length - 1; i >= 0; i--) {
+      for (var i=funcs.length-1; i >= 0; i--) {
         args = [funcs[i].apply(this, args)];
       }
       return args[0];
     };
   };