Contains Duplicate

Can you do this by a one-liner?

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

Constraints:

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

Solution

class Solution:
    def containsDuplicate(self, nums: List[int]) -> bool:
      return len(nums)!=len(set(nums))

O(N) for both time and space complexities.

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