move-zero.js

// Description:
// Given an integer array nums, move all 0's to the end of it while maintaining the relative order of the non-zero elements.
// Note that you must do this in-place without making a copy of the array.

// Example 1:
// Input: nums = [0,1,0,3,12]
// Output: [1,3,12,0,0]

// Example 2:
// Input: nums = [0]
// Output: [0]

// Constraints:
// 1 <= nums.length <= 104
// -231 <= nums[i] <= 231 - 1

// my solution:
var moveZeroes = function (nums) {
  let left = 0;
  let right = 0;

  while (right < nums.length) {
    if (nums[right] !== 0) {
      [nums[left], nums[right]] = [nums[right], nums[left]];
      left++;
    }
    right++;
  }

  for (let i = left; i < nums.length; i++) {
    nums[i] = 0;
  }
  return nums;
};