Letter konami-code [jQuery Plugin]

jquery.konami.js

jQuery.konami = function(fn, code) {
    // ↑ ↑ ↓ ↓ ← → ← → B A
    code = code || [38, 38, 40, 40, 37, 39, 37, 39, 66, 65];
    var i = 0;

    $(document).keydown(function(e) {
        var char = typeof code === 'string' ? String.fromCharCode(e.which).toLowerCase() : e.which;
        i = char === code[i] ? i + 1 : 0;
        if (i === code.length) {
            fn();
            i = 0;
        }
    });
};

$.konami(function() {
    alert('Woohoo!');
});

$.konami(function() {
    alert('Woohoo!');
}, 'foo');

Moved to repo: https://github.com/yckart/jquery.konami.js