Fix #14313: Optimize jQuery.merge for size. Close gh-1344.

diff --git a/src/core.js b/src/core.js
index 6d5c747f42fa0c0900778e5fb582563e1e2174b3..82616eaa57cd4f7ba4e661864ced6cf7ff81074c 100644 (file)
--- a/src/core.js
+++ b/src/core.js
@@ -552,18 +552,14 @@ jQuery.extend({
        },
 
        merge: function( first, second ) {
-               var l = second.length,
+               var l = +second.length,
                        i = first.length,
                        j = 0;
 
-               if ( typeof l === "number" ) {
+               if ( l ) {
                        for ( ; j < l; j++ ) {
                                first[ i++ ] = second[ j ];
                        }
-               } else {
-                       while ( second[j] !== undefined ) {
-                               first[ i++ ] = second[ j++ ];
-                       }
                }
 
                first.length = i;