283-easy-Move_Zeroes.js

/**
283. Move Zeroes

Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements.

For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].

Note:
You must do this in-place without making a copy of the array.
Minimize the total number of operations.
Credits:
Special thanks to @jianchao.li.fighter for adding this problem and creating all test cases.
 */

/**
 * @param {number[]} nums
 * @return {void} Do not return anything, modify nums in-place instead.
 */
var moveZeroes = function (nums) {
  let i = nums.length;
  for (let j = i - 1; j >= 0;) {
    const endNum = nums[j];
    if (endNum !== 0) {
      nums.splice(j, 1);
      nums.splice(0, 0, endNum);
    } else {
      j -= 1;
    }
    i -= 1;
    if (i <= 0) break;
  }
  console.log(nums);
};

moveZeroes([0, 1, 0, 3, 12])