217

// Contains Duplicate

/**
 * @param {number[]} nums
 * @return {boolean}
 */
var containsDuplicate = function (nums) {
    var output = false;
    nums = nums.sort((a, b) => a - b);

    for (i = 0; i < nums.length; i++) {
        if (nums[i] == nums[i + 1]) output = true;
    }

    return output
};