1
var Solution = function (nums) {
2
  this.nums = nums;
3
  this.resetArray = [...nums];
4
};
5

6
Solution.prototype.reset = function () {
7
  return this.resetArray;
8
};
9

10
Solution.prototype.shuffle = function () {
11
  const n = this.nums.length;
12
  const numsArray = this.nums;
13

14
  for (let i = 0; i < n; i++) {
15
    const j = Math.floor(Math.random() * (n - i)) + i;
16
    const tmp = numsArray[i];
17
    numsArray[i] = numsArray[j];
18
    numsArray[j] = tmp;
19
  }
20

21
  return numsArray;
22
};