78일차 - Array.diff

--------------------------------------------🤞 My Solution -----------------------------------------

import java.util.ArrayList;
import java.util.List;
public class Kata {

  public static int[] arrayDiff(int[] a, int[] b) {
    for(int i = 0; i < b.length; i++) {
	for(int j = 0; j < a.length; j++) {
		if(a[j] == b[i]) {
			a[j] = -1;
			}
		}
	}
    List<Integer> list = new ArrayList<Integer>();
    for(int i = 0; i < a.length; i++) {
    	if(a[i] != -1) {
        	list.add(a[i]);
            	}
        }
    int[] result = list.stream().mapToInt(i->i).toArray();
    return result;
  }

}