Contains Duplicate

Description

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

Explanation:

The element 1 occurs at the indices 0 and 3.

Example 2:

Input: nums = [1,2,3,4]

Output: false

Explanation:

All elements are distinct.

Example 3:

Input: nums = [1,1,1,3,3,4,3,2,4,2]

Output: true

Constraints:

- `1 <= nums.length <= 105`
- `-109 <= nums[i] <= 109`

Solve

var containsDuplicate = function(nums) {

    nums.sort((a, b) => a - b);

    for (let i = 1; i < nums.length; i++) {
        if (nums[i] == nums[i - 1]) {
            return true;
        }
    }
    return false;    
};