jquery core: enhancements to jquery.map, closes #2803

diff --git a/src/core.js b/src/core.js
index 6b497fd..c9076b6 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -1194,15 +1194,11 @@ jQuery.extend({
                for ( var i = 0, length = elems.length; i < length; i++ ) {
                        var value = callback( elems[ i ], i );
 
-                       if ( value !== null && value != undefined ) {
-                               if ( value.constructor != Array )
-                                       value = [ value ];
-
-                               ret = ret.concat( value );
-                       }
+                       if ( value != null )
+                               ret[ ret.length ] = value;
                }
 
-               return ret;
+               return ret.concat.apply( [], ret );
        }
 });