[이태훈] 3주차 미션 제출합니다. #10
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binary-ho
approved these changes
Aug 27, 2023
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| - 게으른 특성으로 인한 최적화 | ||
| - limit연산, 쇼트 서킷: 300 칼로리가 넘는 요리는 여러 개지만 처음 3개만 선택됨 | ||
| - 루프 퓨전(loop fusion): filter와 map은 서로 다은 연산이지만 한 과정으로 병합 |
There was a problem hiding this comment.
이미 아시겠지만, 중간에 sorted가 있으면, sorted 전에 루프 퓨전을 끊습니다.
결과물이 있어야 정렬할 수 있으니까요!
아래 코드는
3
3
1
1
2
2
ㅡㅡㅡㅡㅡㅡㅡㅡㅡ(보기 쉬우라고 넣은 공백)
1
1
2
2
3
3
이렇게 출력됩니다.
루프 퓨전이 sorted 이전까지 일어난 다음 한번 정렬하고, 다음 출력을 이어갑니다
List<Integer> list = List.of(3, 1, 2);
list.stream()
.peek(System.out::println)
.peek(System.out::println)
.sorted()
.peek(System.out::println)
.forEach(System.out::println);There was a problem hiding this comment.
결합불가능한 연산에서는 루프퓨전이 끊기는군요.이해했습니다!
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| → 스트림 파이프라인의 개념은 빌터 패턴과 유사하다. | ||
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| ❓빌더 패턴: 복잡한 객체의 생성 과정과 표현 방법을 분리하여 다양한 구성의 인스턴스를 만드는 생성 패턴 |
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심심할 때 읽어보세요!
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LGTM! 고생 많으셨습니다! |
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모던 자바 인 액션 소스 코드 공부 Repo: https://github.com/xogns1514/modernJava.git