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.

这个题目用JS的splice 函数也是非常方便的。

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