code: function( arr, results ) {
  		var ret = results || [];
  
  		if ( arr != null ) {
  			if ( isArraylike( Object(arr) ) ) {
  				jQuery.merge( ret,
  					typeof arr === "string" ?
  					[ arr ] : arr
  				);
  			} else {
  				core_push.call( ret, arr );
  			}
  		}
  
  		return ret;
  	}
docs: results is for internal usage only