Merge pull request prototypejs#59 from jochenberger/fix-objectrange-each

Ensure index is passed to the iterator in `ObjectRange#each`.

Author: savetheclocktower

src/prototype/lang/range.js

@@ -108,9 +108,9 @@ var ObjectRange = Class.create(Enumerable, (function() {
   }
 
   function _each(iterator, context) {
-    var value = this.start;
-    while (this.include(value)) {
-      iterator.call(context, value);
+    var value = this.start, i;
+    for (i = 0; this.include(value); i++) {
+      iterator.call(context, value, i);
       value = value.succ();
     }
   }

test/unit/range_test.js

@@ -27,6 +27,13 @@ new Test.Unit.Runner({
     });
 
     this.assertEnumEqual([0, 1, 2, 3], results);
+
+    results = [];
+    $R(2, 4, true).each(function(value, index) {
+      results.push(index);
+    });
+    this.assertEnumEqual([0, 1], results);
+
   },
 
   testAny: function() {