JavaScript Tutorial

jQuery.noop()

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>noop </title>    
    <script src="http://cdn.static.w3big.com/libs/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>
    <span></span>
    <script>
        $(function () { 
            var result = $.map( [1, 2, 3], $.noop );
            document.writeln( result.length ); // 0
        })
    </script>
</body>
</html>