知乎上看到这个逆天的代码，感觉我不会写js.
https://www.zhihu.com/question/44213758/answer/97448141?group_id=708529590292713472
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GBK"> </head> <body> <div id="box" style="252px;font:25px/25px 宋体;background:#000;color:#9f9;text-shadow:2px 3px 1px #0f0;"></div> <script> var map = eval("[" + Array(23).join("0x801,") + "0xfff]"); var tatris = [ [0x6600], [0x2222, 0xf00], [0xc600, 0x2640], [0x6c00, 0x4620], [0x4460, 0x2e0, 0x6220, 0x740], [0x2260, 0xe20, 0x6440, 0x4700], [0x2620, 0x720, 0x2320, 0x2700] ]; var keycom = { "38": "rotate(1)", "40": "down()", "37": "move(2,1)", "39": "move(0.5,-1)" }; var dia, pos, bak, run; function start() { dia = tatris[~~(Math.random() * 7)]; bak = pos = { fk: [], y: 0, x: 4, s: ~~(Math.random() * 4) }; rotate(0); } function over() { document.onkeydown = null; clearInterval(run); alert("GAME OVER"); } function update(t) { bak = { fk: pos.fk.slice(0), y: pos.y, x: pos.x, s: pos.s }; if (t) return; for (var i = 0, a2 = ""; i < 22; i++) a2 += map[i].toString(2).slice(1, -1) + "<br/>"; for (var i = 0, n; i < 4; i++) if (/([^0]+)/.test(bak.fk[i].toString(2).replace(/1/g, "u25a1"))) a2 = a2.substr(0, n = (bak.y + i + 1) * 15 - RegExp.$_.length - 4) + RegExp.$1 + a2.slice(n + RegExp.$1.length); document.getElementById("box").innerHTML = a2.replace(/1/g, "u25a0").replace(/0/g, "u3000"); } function is() { for (var i = 0; i < 4; i++) if ((pos.fk[i] & map[pos.y + i]) != 0) return pos = bak; } function rotate(r) { var f = dia[pos.s = (pos.s + r) % dia.length]; for (var i = 0; i < 4; i++) pos.fk[i] = (f >> (12 - i * 4) & 15) << pos.x; update(is()); } function down() { ++pos.y; if (is()) { for (var i = 0; i < 4 && pos.y + i < 22; i++) if ((map[pos.y + i] |= pos.fk[i]) == 0xfff) map.splice(pos.y + i, 1), map.unshift(0x801); if (map[1] != 0x801) return over(); start(); } update(); } function move(t, k) { pos.x += k; for (var i = 0; i < 4; i++) pos.fk[i] *= t; update(is()); } document.onkeydown = function(e) { eval(keycom[(e ? e : event).keyCode]); }; start(); run = setInterval("down()", 400); </script> </body> </html>
