Contains DuplicateEasy

Contains Duplicate

Easy 11.4k61% acceptance

ArrayHash Table

Given an integer array nums, return true if any value appears at least twice, and 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

Constraints

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JavaScript

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Case 1

[1,2,3,1]

expected: true

Case 2

[1,2,3,4]

expected: false

Case 3

[1,1,1,3,3,4,3,2,4,2]

expected: true