[비교] 집합 연산

- Java Collection<Integer> a = new HashSet<Integer>(Arrays.asList(1, 2, 3)); Collection<Integer> b = Arrays.asList(3, 4, 5); a.addAll(b); //[1, 2, 3, 4, 5] a.retainAll(b); //[3] a.removeAll(b); //[1, 2]
- Groovy
a = [1, 2, 3]
a.class
Result: class java.util.ArrayList

- Python a = set([1, 2, 3]) b = set((3, 4, 5)) a | b #{1, 2, 3, 4, 5} a & b #{3} a - b #{1, 2}
- SQL
http://pantarei.tistory.com/1197

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JavaScript로 Set(집합), 관련 함수(합집합, 교집합, 차집합)들 구현하기

https://jun-choi-4928.medium.com/javascript%EB%A1%9C-set-%EC%A7%91%ED%95%A9-%EA%B4%80%EB%A0%A8-%ED%95%A8%EC%88%98-%ED%95%A9%EC%A7%91%ED%95%A9-%EA%B5%90%EC%A7%91%ED%95%A9-%EC%B0%A8%EC%A7%91%ED%95%A9-%EB%93%A4-%EA%B5%AC%ED%98%84%ED%95%98%EA%B8%B0-e7d4d820b03c

Set()은 ie11부터...ㅋㅋ

jQuery 합집합, 교집합, 차집합, 대칭차

https://zetawiki.com/wiki/JQuery_%ED%95%A9%EC%A7%91%ED%95%A9,_%EA%B5%90%EC%A7%91%ED%95%A9,_%EC%B0%A8%EC%A7%91%ED%95%A9,_%EB%8C%80%EC%B9%AD%EC%B0%A8