283. Move Zeroes

https://leetcode.com/problems/move-zeroes/description/
Solution 1, use iterators to erase 0s and add 0 to the end.
    void moveZeroes(vector<int>& nums) {
        vector<int>::iterator it=nums.begin();
        for(int i=0;i<nums.size();i++) {
            if(*it == 0) {
                nums.erase(it);
                nums.push_back(0);
            }
            else
                it++;
        }
    }
Solution 2, for i = 0 to nums.size()-1, copy nums[i] to an array starts from j=0. Since non-zeros is less than nums.size() and i>=j always, just use &nums[0] for the copied array.
    void moveZeroes(vector<int>& nums) {
        int j = 0;
        for(int i=0;i<nums.size();i++) {
            if(nums[i]!=0) {
                nums[j++] = nums[i];
            }
        }
        while(j<nums.size()) {
            nums[j] = 0; ->
            j++;
        }
    }