(function(vv){ alert(vv) })(1) !function(vv){ alert(vv) }(2) +function(vv){ alert(vv) }(3) -function(vv){ alert(vv) }(4) ~function(vv){ alert(vv) }(5)
立即执行函数
原文：https://www.cnblogs.com/hyx626/p/10375717.html
