Leetcode–Remove Element

The Problem:

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

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


  1. Two pointer easy one.

Java Solution:

public class Solution {
    public int removeElement(int[] A, int elem) {
        if(A.length==0)return 0;
        int replace = 0;
        for(int i = 0; i < A.length; i++){
                A[replace] = A[i];
        return replace;

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