Ticket #2616: map[5753].diff

jquery/src/core.js

@@ -1201 +1201 @@
         return ret;
     },
 
-    map: function( elems, callback ) {
-        var ret = [];
-
+    map: function( source, callback, target ) { 
+        if( !target ) 
+            target = 'length' in source ? [ ] : { }; 
+        
+        if( 'length' in target ){ // Is it an array(-like) ? else a hash 
+            var arr = true; 
+            if( !target.concat )// Fix array-like objects, or they will fail the final concat 
+                target = jQuery.makeArray(target); 
+        } 
         // Go through the items, translating each of the items to their
         // new value (or values).
-        for ( var i = 0, length = elems.length; i < length; i++ ) {
-            var value = callback( elems[ i ], i );
+        jQuery.each( source , function( key, value ){ 
+            value = callback( value, key ); 
+        
+            if ( value != null ) 
+                target[ arr ? target.length : key ] = value; 
+        }); 
 
-            if ( value != null )
-                ret[ ret.length ] = value;
-        }
-
-        return ret.concat.apply( [], ret );
+        return arr ? target.concat.apply( [], target ) : target;
     }
 });