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[namgiho96] WEEK 01 solutions #1717

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[namgiho96] WEEK 01 solutions #1717

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12 changes: 12 additions & 0 deletions contains-duplicate/namgiho96.ts
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안녕하세요, TypeScript 언어에 대한 background가 없어 덕분에 새롭게 찾아보고 알아갑니다. Set을 사용해서 기존 nums와 길이 비교를 하는 방법이 새롭습니다. 이렇게 풀면 O(n)으로 빠른 처리가 가능할 것 같네요. 코드 풀이가 좋아서 배워갑니다.

Original file line number Diff line number Diff line change
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/**
* @param {number[]} nums
* @return {boolean}
* @Description
* 1. Set을 사용하여 중복된 값을 확인한다.
* 2. Set의 크기가 nums의 길이와 다르면 중복된 값이 있다는 의미이므로 true를 반환한다.
* 3. Set의 크기가 nums의 길이와 같으면 중복된 값이 없다는 의미이므로 false를 반환한다.
*/

function containsDuplicate(nums: number[]): boolean {
return new Set(nums).size !== nums.length;
}