李嘉杰的博客

一、reduce    function findlongest(str){ let arr=str.split(" ")//切割成数组,注意中间有个空格 var longest=arr.reduce((first,next)=>next.length>first.length?first:next) return longest.length ] 二、sort    funct

转载自http://blog.youkuaiyun.com/nazhidao/article/details/51379401