LeetCode: Duplicate Zeros Solution

1/**
2 * @param {number[]} arr
3 * @return {void} Do not return anything, modify arr in-place instead.
4 */
5var duplicateZeros = function (arr) {
6  const N = arr.length
7  for (let i = 0; i < N - 1; i++) {
8    if (arr[i] === 0) {
9      let prev = arr[i + 1]
10      for (let j = i + 2; j < N; j++) {
11        let temp = arr[j]
12        arr[j] = prev
13        prev = temp
14      }
15      arr[++i] = 0
16    }
17  }
18}