JS如何从数组中随机取出若干个数，且不重复

//原数组

var  arr = [0,1,2,3,4,5,6,7,8,9,10,11];
//输出数组
var  out = [];
//输出个数
var  num = 5;
while (out.length < num){
    var  temp = (Math.random()*arr.length) >> 0;
    out.push(arr.splice(temp,1));
}
alert(out);

转载于:https://www.cnblogs.com/Zeki/p/5902558.html