Contains Duplicateeasy

/**
 * @param {number[]} nums
 * @return {boolean}
 */
function containsDuplicate(nums) {
    // TODO: return true if any value appears more than once
    return false;
}

console.log(containsDuplicate([1, 2, 3, 1])); // true
console.log(containsDuplicate([1, 2, 3, 4])); // false