LeetCode: Contains Duplicate Solution
SetApproach
Compare size of set created from array and the length of original array
Implementation
1var containsDuplicate = function (nums) {2 return new Set(nums).size !== nums.length3}
References
Similar problems
Contains Duplicate III
Make Array Zero by Subtracting Equal Amounts
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Tags
leetcode
neetcode
array
hash table
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Stale solution might be time-limit exceeded someday