一段神奇的代码

alert((++[[]][+[]]/[]+[])[+[]]+([{}]+[])[++[[]][+[]]+[+[]]-+!+[]-+!+[]-+!+[]]+(![]+[])[!+[]+!+[]]+([{}]+[])[+!+[]]+'v'+(-{}+[]+[]+[][+[]])[+!+[]+[+[]]]+([{}]+[])[++[[]][+[]]+[+[]]-+!+[]-+!+[]-+!+[]]+(++[[]][+[]]/[]+[])[+!+[]+[+[]]-!+[]-!+[]-!+[]]+([{}]+[])[+!+[]]+([][[]]+[])[+[]]);