变态js脚本解析？

[cctrys]

今天看到一个网站的变态js脚本，不知是如何计算出来的，还请各位大牛帮忙看看啊！感激不尽！

var tttt = (function(){return ((!+[]+!![]+!![]+!![]+!![]+[])+(+[]+[])+(+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+(+!![]+[])+(+[]+[])+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(![]+[])[+[]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(+{}+[])[+!![]]+(+{}+[])[+!![]]+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+(!+[]+!![]+!![]+!![]+[])+([]+{})[!+[]+!![]]+([]+[][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]][([]+{})[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]]+(![]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!![]+[])[+[]]+([]+{})[+!![]]+(!![]+[])[+!![]]]((!![]+[])[+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!![]]+([][[]]+[])[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]+!![]+!![]]+(![]+[])[!+[]+!![]]+([]+{})[+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]]+(!![]+[])[+[]]+([][[]]+[])[!+[]+!![]+!![]+!![]+!![]]+([]+{})[+!![]]+([][[]]+[])[+!![]])())[+[]]+(![]+[])[+[]]+([][[]]+[])[!+[]+!![]+!![]]+(+!![]+[])+(![]+[])[+[]]+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+([][[]]+[])[!+[]+!![]+!![]]+([][[]]+[])[!+[]+!![]+!![]]+([][[]]+[])[!+[]+!![]]+(!+[]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(![]+[])[+[]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(![]+[])[+[]]+(+{}+[])[+!![]]+(+!![]+[])+(+[]+[])+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+(+{}+[])[+!![]]+(+!![]+[])+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(+[]+[])+([][[]]+[])[!+[]+!![]]+(!+[]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(![]+[])[+[]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]]+(![]+[])[+[]]+(!+[]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+[])+(![]+[])[+[]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+([]+{})[!+[]+!![]+!![]+!![]+!![]]+([][[]]+[])[!+[]+!![]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+([]+{})[!+[]+!![]]+(![]+[])[+[]]+([]+{})[!+[]+!![]]+([]+{})[!+[]+!![]]+(!+[]+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+(!+[]+!![]+!![]+!![]+[])+(![]+[])[+[]]+(!+[]+!![]+!![]+[])+(!+[]+!![]+!![]+[])+(![]+[])[+[]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+[])+([]+{})[!+[]+!![]]+([][[]]+[])[!+[]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+([][[]]+[])[!+[]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(+!![]+[])+(![]+[])[+[]]+(+{}+[])[+!![]]+(+!![]+[])+([][[]]+[])[!+[]+!![]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+[])+(![]+[])[+[]]+(+[]+[])+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(!+[]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+[])+(+[]+[])+([]+{})[!+[]+!![]]+(![]+[])[+[]]+(+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+!![]+!![]+[])+(+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+[])+(!+[]+!![]+[])+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+([]+{})[!+[]+!![]]+(!+[]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+!![]+[])+([][[]]+[])[!+[]+!![]]+(![]+[])[+[]]+([][[]]+[])[!+[]+!![]]+([]+{})[!+[]+!![]]+(+!![]+[])+(!+[]+!![]+!![]+!![]+[])+([]+{})[!+[]+!![]+!![]+!![]+!![]]+(+{}+[])[+!![]])})();

最后函数返回对象 ttt 的值是：
50151048f8aa43e8e4bffe1f4661e66eeed39345c46f8fa10445a14780d5759161556fcaf45f7ece6bfbb2e4f33f7bd6d69171fa1e83f0c340bf1941729b9dfdb14ca

不知是怎么计算出来的？

[老鼠拧刀满街找猫]

http://mp.weixin.qq.com/s/6G1T1prouf4pF7mt4lOQMw 看这里你就明白了

[二月十六]

混淆过的、很容易还原的