关于es6的问题

Question

function findShort(s){

        return Math.min(...s.split(" ").map (s => s.length));

        }

var p1 = findShort("bitcoin take over the world maybe who knows perhaps"); //3

var p2 = findShort("turns out random test cases are easier than writing out basic ones") //3

console.log(p1); //3

console.log(p2); //3

找出最短的长度的字符串，这里的...起到什么作用？这好像不是类数组把。。

Answer 1

function findShort(s) {    let arr = s.split(" ").map(s => s.length);    return Math.min(...arr);}