Merge pull request prototypejs#60 from jochenberger/fix-hash-each

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

Author: savetheclocktower

src/prototype/lang/hash.js

@@ -94,11 +94,13 @@ var Hash = Class.create(Enumerable, (function() {
 
   // Our _internal_ each
   function _each(iterator, context) {
+    var i = 0;
     for (var key in this._object) {
       var value = this._object[key], pair = [key, value];
       pair.key = key;
       pair.value = value;
-      iterator.call(context, pair);
+      iterator.call(context, pair, i);
+      i++;
     }
   }
 

test/unit/hash_test.js

@@ -182,6 +182,15 @@ new Test.Unit.Runner({
     var foo = new FooMaker('bar');
     this.assertEqual("key=bar", new Hash(foo).toQueryString());
     this.assertEqual("key=bar", new Hash(new Hash(foo)).toQueryString());
+  },
+
+  testIterationWithEach: function()  {
+    var h = $H({a:1, b:2});
+    var result = []
+    h.each(function(kv, i){
+      result.push(i);
+    });
+   this.assertEnumEqual([0,1], result);
   }
 
 });