examples/KonamiCode.html

<!DOCTYPE html>
    <head>
        <title>Rx for JavaScript Rocks!</title>   
        <script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.1.min.js" type="text/javascript"></script>
        <script src="rx.js" type="text/javascript"></script>
        <script src="rx.aggregates.js" type="text/javascript"></script>
        <script src="../lib/rx.jquery.js" type="text/javascript"></script>
        <script type="text/javascript">

            (function ($) {

                $(function () {
                    var codes = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65]
                    ,   konami = Rx.Observable.fromArray(codes)
                    ,   result = $('#result');

                    $(document).keyupAsObservable()
                        .select(function (e) { return e.keyCode; })
                        .windowWithCount(10)
                        .selectMany(function (x) { return x.sequenceEqual(konami); })
                        .where(function (equal) { return equal; })
                        .subscribe(function () {
                            result.html('KONAMI!').fadeOut(2000);
                        });
                });
            })(jQuery);
        </script>
    </head>

    <body style="font-family: Consolas, monospace; overflow: hidden">
        <div id="result"></div>
    </body>
</html>