Contains Duplicate

217. Contains Duplicate
Easy
Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.

class Solution {
 
  public boolean containsDuplicate(int[] nums) {
    HashSet<Integer> uniques = new HashSet<>();
    for (int num : nums) {
      if (uniques.contains(num)) {
        return true;
      }
      uniques.add(num);
    }
    return false;
  }
}