72行代码贪吃蛇

【Javascript】

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<script type='text/javascript'>
X = Y = 30;
var S='';
for (var y = 0; y < Y; y++)
    for (var x = 0; x < X; x++)
        S+='<div style="display:inline-block;_display:inline;width:10px;height:10px;font-size:1px;background-color:#c0c0c0;" id="x' + x + 'y' + y + '"></div>'+(x == X - 1?'<br>':'');
document.write(S);
var sk = {
    Snake: [[X >> 1, Y >> 1]],
    Dir: [0, 1]
};
function $(xy) {
    return document.getElementById('x' + xy[0] + 'y' + xy[1]);
}
function setc(obj, color) {
    obj.style.backgroundColor = color;
}
var cancel, R ,add = 2;
(function() {
    cancel = 0;
    var st;
    with(sk) {
        for (var i=Snake.length; i--;) {
            if(i==Snake.length-1){
                setc($(Snake[i]), '#c0c0c0');
                st = Snake[i].join(',').split(',');
            }
            i && setc($(Snake[i] = Snake[i - 1].join(',').split(',')), 'blue');
            if (uequ(Snake[i], R)) R = 0 * ++add;
        }
        if (add) {
            --add;
            Snake.push(st);
        }
        Snake[0][0] += Dir[0];
        Snake[0][1] += Dir[1];
        var res;
        if (res = ('x'+Snake.join('xx')+'x').match(new RegExp('x'+X + ',|,' + Y + 'x|-|(x\\d+,\\d+x).*?x\\1', 'ig')))
            return alert(((res + '').match(/x.+?x/) ? '咬到自己！': '撞墙！'));
	setTimeout(arguments.callee,100);
        setc($(Snake[0]), 'red');
    }
    setc($(R = R || [Math.random() * X | 0, Math.random() * Y | 0]), 'green');
})();
document.onkeydown = function(e) {
    e = e || event;
    e = e.keyCode || e.which;
    var w = {
        '38': [0, -1],
        '39': [1, 0],
        '40': [0, 1],
        '37': [ - 1, 0]
    };
    if (!cancel && !uequ(sk.Dir, w[e])) {
        cancel = sk.Dir = w[e]||sk.Dir;
    }
};
function uequ(a1, a2) {
    return (a1 + '\n' + a2).replace(/-|,/g, '').match(/^(\d+)\n\1$/);
}
alert('按确定开始游戏！');
</script>