LeetCode: Contains Duplicate Solution

Set

Approach

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.length
3}

References

Original problem

Similar problems

Contains Duplicate II

Contains Duplicate III

Make Array Zero by Subtracting Equal Amounts

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leetcode

neetcode

array

hash table

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