数组随机打乱顺序方法

let arr = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];

function shuffle(arr) {
    let i = arr.length;
    while (i) {
        let j = Math.floor(Math.random() * i--);
        [arr[j], arr[i]] = [arr[i], arr[j]];
    }
    return arr;
}
shuffle(arr);