LeetCode: 27. Remove Element

LeetCode: 27. Remove Element

Given an array and a value, remove all instances of that value in
place and return the new length.

Do not allocate extra space for another array, you must do this in
place with constant memory.

The order of elements can be changed. It doesn’t matter what you leave
beyond the new length.

Example: Given input array nums = [3,2,2,3], val = 3

Your function should return length = 2, with the first two elements of
nums being 2.

自己的答案，9ms

public class Solution {    public int removeElement(int[] nums, int val) {        if (nums == null) {            return 0;        }        int length = nums.length;        int result = 0;        for (int i = 0; i < length; i++) {            if (nums[i] != val) {                nums[result++] = nums[i];            }        }        return result;    }}