/**

* Difficulty:

* Easy

*

* Desc:

* 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.

*

* 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.

*/

/**

* @param {number[]} nums

* @return {void} Do not return anything, modify nums in-place instead.

*/

var moveZeroes = function(nums) {

const zeroIndexs = [];

for (let i = 0; i < nums.length; i += 1) {

const num = nums[i];

if (num === 0) {

zeroIndexs.push(i);

} else if (num !== 0 && zeroIndexs.length) {

const zIndex = zeroIndexs.shift();

nums[zIndex] = num;

nums[i] = 0;

zeroIndexs.push(i);

}

}

};