[럿고] 자동차 경주 게임 제출합니다. #2
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added 16 commits
June 22, 2020 13:18
- 5자 초과시 예외 발생
- 2미만이거나 10을 초과했을 경우 예외처리
- 2미만이거나 10을 초과했을 경우 예외처리
- 위치는 0 ~ 10만 가지고 있다.
hongbin-dev
reviewed
Jun 25, 2020
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| package domain.car; | |||
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| @FunctionalInterface | |||
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| public interface CarMoveStrategy { | ||
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| int move(); |
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interface만 봤을 때 이동하는 전략일까? 라는 생각이 드는 네이밍이에요.
move의 메서드이름도 integer를 생성하는 일만 하고있는데 move가 맞을까 생각이 듭니다.
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네이밍을 조금 더 고민했어야 하는데, ㅎㅎ 감사합니다~
| public class RacingController { | ||
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| private static final String SPLIT_DELIMITER = ","; | ||
| private static final CarMoveStrategy carMoveStrategy = () -> (int)(Math.random() * 10); |
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| OutputView.runResultGuide(); | ||
| for (int i = 0; i < gameCount.getGameCount(); i++) { | ||
| cars.moveCars(carMoveStrategy); | ||
| OutputView.printRunResult(cars.getCars()); | ||
| } |
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for-each문으로 바꿀수있는 방법은 없을까요?
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getCount.getGameCount()가 int인데 어떻게 해야 하나요.. ㅠㅠ 정말 몰라서 물어봅니다 ㅠㅠ
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| private List<Car> createCars(final String inputCarNames) { | ||
| List<String> carNames = Arrays.stream(inputCarNames.split(SPLIT_DELIMITER)) | ||
| .collect(Collectors.toList()); | ||
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| return carNames.stream() | ||
| .map(Name::new) | ||
| .map(name -> new Car(name, PositionFactory.of(0))) | ||
| .collect(Collectors.toList()); |
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Suggested change
| private List<Car> createCars(final String inputCarNames) { | |
| List<String> carNames = Arrays.stream(inputCarNames.split(SPLIT_DELIMITER)) | |
| .collect(Collectors.toList()); | |
| return carNames.stream() | |
| .map(Name::new) | |
| .map(name -> new Car(name, PositionFactory.of(0))) | |
| .collect(Collectors.toList()); | |
| private Cars createCars(final String inputCarNames) { | |
| List<String> carNames = Arrays.stream(inputCarNames.split(SPLIT_DELIMITER)) | |
| .collect(Collectors.toList()); | |
| return carNames.stream() | |
| .map(Name::new) | |
| .map(name -> new Car(name, PositionFactory.of(0))) | |
| .collect(collectingAndThen(toList(), Cars::new)); |
이렇게 가져가도 가독성이 좋을 것 같아요.
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| protected Position(final int position) { | ||
| this.position = position; | ||
| } |
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패키지레벨을 더 디테일하게 만들고, default 접근지정자는 어떨까요?
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| private static final List<Position> positions = IntStream.range(0, 11) | ||
| .mapToObj(Position::new) | ||
| .collect(Collectors.toList()); | ||
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| private PositionFactory() { | ||
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| } | ||
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| public static Position of(int positionValue) { | ||
| return positions.stream() | ||
| .filter(position -> position.getPosition() == positionValue) | ||
| .findFirst() | ||
| .orElseThrow(() -> new IllegalArgumentException("나올 수 없는 위치 입니다. position = " + positionValue)); | ||
| } |
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10개밖에 없어서 큰 차이는 아니지만 Map<Integer, Position> map 으로 갖고있으면, of에서 순회하면서 찾는것보다 빠를것 같아요.
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Intstream.rangeClosed(0,10)이 가독성이 더 좋을 것 같군요
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- 다음에 고려해볼께요. 절대로 귀찮아서가 아닙니다!
- 그렇네요~
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| private static final List<GameCount> gameCounts = IntStream.range(2, 11) | ||
| .mapToObj(GameCount::new) | ||
| .collect(Collectors.toList()); |
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stream.rangeClosed() 사용을 추천드리고, 상수 값을 활용해볼까요?
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| private static void validateNotNumber(final String gameCount){ | ||
| try{ | ||
| Integer.parseInt(gameCount); | ||
| }catch (NumberFormatException e){ | ||
| throw new NumberFormatException("숫자만 입력이 가능합니다. gameCount = " + gameCount); | ||
| } | ||
| } |
src/main/java/view/OutputView.java
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| String winner = winners.stream() | ||
| .map(Car::getName) | ||
| .collect(Collectors.joining(", ")); |
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오랜만에 하니깐 재미있네요 ㅎㅎ
전체적으로 부족한 코드인데 마음껏 까주세요 ㅎㅎ
잘 부탁드려요!