0027-remove-element.cs

public class Solution {
    public int RemoveElement(int[] nums, int val) {
        if (nums == null || nums.Length == 0)
            return 0;
        
        int i = 0;
        
        for (int j = 0; j < nums.Length; j++)
        {
            while (j < nums.Length && nums[j] == val)
                j++;
            
            if (j < nums.Length)
                nums[i++] = nums[j];
        }
        
        return i;
    }
}