This repository is intended for students to practice TDD in Javascript using a fun TDD Ping Pong approach.
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.
Example 1:
Input: nums = [1,2,3,1]
Output: true
Example 2:
Input: nums = [1,2,3,4]
Output: false
Example 3:
Input: nums = [1,1,1,3,3,4,3,2,4,2]
Output: true
1 <= nums.length <= 105
-109 <= nums[i] <= 109
Take from Leetcode