[로또] 염규영 미션 제출합니다. #1344

gyuoo · 2024-11-04T14:57:41Z

😥 자기 반성

핑계겠지만.. 평일 일정과 약 50인의 코드 리뷰 진행 때문에 바쁘다고 구현을 월요일 오후 9시에 시작했다.
구현도 오전 2시에 마쳤을 뿐더러 테스트 코드, 소감문은 당연히 적지 못했다.
심지어 기본 제공된 테스트도 하나 통과하지 못한다.
구현한 코드 마저 깔끔하게 해내지 못한 것이 너무나도 훤히 보인다 ...
이번 주는 코드 리뷰 비중을 줄이고, 쉬는 시간도 4주차 과제에 투자해서 성공적으로 구현하도록 하자.
＋추후 리팩토링 예정

📂 패키지 구조

🌐 src.main.java.lotto
│
├── 📦 constants
│   └── LottoConstantNumbers
│
├── 📦 controller
│   └── LottoController
│
├── 📦 domain
│   ├── Lotto
│   ├── LottoResult
│   ├── Prize
│   └── WinningNumber
│
├── 📦 exception
│   ├──📦 lottoticketexception
│   │   ├── DuplicateException
│   │   └── LottoNumberSizeException
│   │
│   ├──📦 numberexception
│   │   ├── InvalidNumberException
│   │   └── OutOfRangeNumberException
│   │
│   ├──📦 purchaseamountexception
│   │   ├── InvalidPurchaseAmountException
│   │   ├── MaxPurchaseExceedException
│   │   ├── NegativePurchaseAmountException
│   │   └── NotDivisibleByLottoPriceException
│   │
│   ├── ErrorConstants
│   └── ErrorMessage
│
├── 📦 factory
│   └── LottoTicketStore
│
├── 📦 service
│   ├── LottoGameService
│   ├── LottoPurchaseService
│   ├── LottoResultCalculator
│   └── LottoStatisticsService
│
├── 📦 util
│   ├── DuplicateValidator
│   ├── LottoNumberSorter
│   ├── NumberValidator
│   ├── PurchaseAmountValidator
│   ├── RandomNumberGenerator
│   └── WinningNumberSeparator
│
├── 📦 view
│   ├── ConsoleMessage
│   ├── InputView
│   └── OutputView
│
└── Application

📌 계획

로또의 흐름 파악
어울리는 디자인 패턴 선정
패키지 구조 설계
구현할 기능 목록 정리
README.md 작성
프로젝트 초기 설정
구현
예외 처리에 대한 검토
테스트 코드 작성
리팩토링

…ated constants

…th winning numbers

gyuoo · 2024-11-05T07:44:55Z

src/main/java/lotto/Application.java

+	public static void main(String[] args) {
+		RandomNumberGenerator randomNumberGenerator = new RandomNumberGenerator();
+		LottoNumberSorter lottoNumberSorter = new LottoNumberSorter();
+		LottoTicketStore lottoTicketStore = new LottoTicketStore(randomNumberGenerator, lottoNumberSorter);
+
+		NumberValidator numberValidator = new NumberValidator();
+		DuplicateValidator duplicateValidator = new DuplicateValidator();
+		WinningNumberSeparator winningNumberSeparator = new WinningNumberSeparator();
+		PurchaseAmountValidator purchaseAmountValidator = new PurchaseAmountValidator(numberValidator);
+
+		OutputView outputView = new OutputView();
+		InputView inputView = new InputView(outputView, purchaseAmountValidator, winningNumberSeparator,
+			duplicateValidator);
+
+		LottoPurchaseService lottoPurchaseService = new LottoPurchaseService(inputView, outputView, lottoTicketStore);
+		LottoGameService lottoGameService = new LottoGameService(inputView);
+		LottoResultCalculator lottoResultCalculator = new LottoResultCalculator();
+		LottoStatisticsService lottoStatisticsService = new LottoStatisticsService(lottoResultCalculator, outputView);
+		LottoController lottoController = new LottoController(lottoGameService, lottoPurchaseService,
+			lottoStatisticsService);
+
+		lottoController.play();
+	}


리팩토링이 필요해 보인다. 15줄을 넘기기도 했다.

의존성을 관리하는 객체를 생성해보시길 추천드립니다.

gyuoo · 2024-11-05T07:46:34Z

src/main/java/lotto/controller/LottoController.java

+	public void play() {
+		int purchaseAmount = lottoPurchaseService.purchaseForLottos();
+		List<Lotto> lottos = lottoPurchaseService.buyLottos(purchaseAmount);
+		WinningNumber winningNumber = lottoGameService.setWinningNumber();
+		LottoResult lottoResult = lottoGameService.playLottoGame(lottos, winningNumber);
+		lottoStatisticsService.summarizeStatistics(purchaseAmount, lottos, winningNumber);
+	}


개인적으로 맘에 드는 부분이다... service단을 잘 나누었다고 생각한다 😅

service단을 객체가 아닌 기능별로 나누신 이유가 있을까요?

gyuoo · 2024-11-05T07:51:22Z

src/main/java/lotto/util/PurchaseAmountValidator.java

+	private boolean canDivideWithPrice(int purchaseAmount) {
+		return purchaseAmount % LottoConstantNumbers.LOTTO_PRICE.getValue() == 0;
+	}
+
+	private boolean isExceedMaxPurchaseAmount(int purchaseAmount) {
+		return purchaseAmount > LottoConstantNumbers.MAX_PURCHASE_AMOUNT.getValue();
+	}


boolean으로 검증하고 싶었는데, 그냥 각 메서드별로 throw하는 게 나았나 싶다

각 boolean값을 지역변수로 가져와 한번에 throw하는 방안을 고려할 수 있을것 같습니다.

gyuoo · 2024-11-05T07:52:13Z

src/main/java/lotto/view/ConsoleMessage.java

+	MATCH_3("3개 일치 (5,000원) - %d개"),
+	MATCH_4("4개 일치 (50,000원) - %d개"),
+	MATCH_5("5개 일치 (1,500,000원) - %d개"),
+	MATCH_5_BONUS("5개 일치, 보너스 볼 일치 (30,000,000원) - %d개"),
+	MATCH_6("6개 일치 (2,000,000,000원) - %d개"),


일치하는 숫자의 수, 당첨금도 상수로 표현하고 싶었는데 그러지 못했다

gyuoo · 2024-11-05T07:52:40Z

src/main/java/lotto/view/InputView.java

+	public int getPurchaseAmount() {
+		while (true) {
+			outputView.printPurchaseAmountMessage();
+			String input = readLine();
+
+			try {
+				return purchaseAmountValidator.validateInput(input);
+			} catch (InvalidPurchaseAmountException e) {
+				outputView.printInvalidPurchaseAmountMessage();
+			} catch (NegativePurchaseAmountException e) {
+				outputView.printInvalidPurchaseAmountMessage();
+			} catch (NotDivisibleByLottoPriceException e) {
+				outputView.printNotDivisibleByLottoPriceMessage();
+			} catch (MaxPurchaseExceedException e) {
+				outputView.printMaxPurchaseExceedMessage();
+			}
+		}
+	}
+
+	public List<Integer> getWinningNumbers() {
+		while (true) {
+			outputView.printToGetWinningNumbers();
+			String input = readLine();
+			List<Integer> numbers = winningNumberSeparator.splitByComma(input);
+			try {
+				return duplicateValidator.validateNoDuplicates(numbers);
+			} catch (NumberFormatException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (LottoNumberSizeException e) {
+				outputView.printInvalidLottoNumberSizeMessage();
+			} catch (OutOfRangeNumberException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (DuplicateException e) {
+				outputView.printDuplicateNumberMessage();
+			}
+		}
+	}
+
+	public int getBonusNumber(List<Integer> winningNumbers) {
+		while (true) {
+			outputView.printToGetBonusNumbers();
+			String input = readLine();
+
+			try {
+				int bonusNumber = Integer.parseInt(input);
+				duplicateValidator.validateNoOverlapWithWinningNumbers(bonusNumber, winningNumbers);
+				return bonusNumber;
+			} catch (NumberFormatException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (OutOfRangeNumberException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (DuplicateException e) {
+				outputView.printDuplicateNumberMessage();
+			}
+		}
+	}


으악 이게 뭐야

나눠주세요.

gyuoo · 2024-11-05T07:53:05Z

src/main/java/lotto/view/OutputView.java

+	public void printPrizeStatistics(Map<Prize, Integer> prizeCounts) {
+		StringBuilder statisticBuilder = new StringBuilder();
+		statisticBuilder.append(WINNING_STATISTICS.getMessage())
+			.append('\n')
+			.append(DIVIDER.getMessage())
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_3.getMessage(), prizeCounts.get(Prize.FIFTH)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_4.getMessage(), prizeCounts.get(Prize.FOURTH)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_5.getMessage(), prizeCounts.get(Prize.THIRD)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_5_BONUS.getMessage(), prizeCounts.get(Prize.SECOND)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_6.getMessage(), prizeCounts.get(Prize.FIRST)))
+			.append('\n');
+		System.out.print(statisticBuilder);
+	}


좀 더 예쁘게 작성할 수 없었을까?

print메서드를 좀더 제네릭하게 만들면 어떨까요?

gyuoo · 2024-11-05T07:53:45Z

src/test/java/lotto/LottoTest.java

테스트 코드 어디갔을까... 시간에 쫓겨 구현한 나를 또 반성한다
이번 주는 꼭 넉넉하게 하자

아쉽습니다. 이번 주는 충분한 시간을 갖길 바랍니다.

jiffyin7

3주차도 고생하셨습니다.
50인의 코드리뷰는 많이 무섭네요..
그럼에도 불구하고 좋은 퀄리티의 코드를 작성하신거 같습니다.
4주차도 화이팅 입니다.

jiffyin7 · 2024-11-05T09:54:45Z

src/main/java/lotto/Application.java

+	public static void main(String[] args) {
+		RandomNumberGenerator randomNumberGenerator = new RandomNumberGenerator();
+		LottoNumberSorter lottoNumberSorter = new LottoNumberSorter();
+		LottoTicketStore lottoTicketStore = new LottoTicketStore(randomNumberGenerator, lottoNumberSorter);
+
+		NumberValidator numberValidator = new NumberValidator();
+		DuplicateValidator duplicateValidator = new DuplicateValidator();
+		WinningNumberSeparator winningNumberSeparator = new WinningNumberSeparator();
+		PurchaseAmountValidator purchaseAmountValidator = new PurchaseAmountValidator(numberValidator);
+
+		OutputView outputView = new OutputView();
+		InputView inputView = new InputView(outputView, purchaseAmountValidator, winningNumberSeparator,
+			duplicateValidator);
+
+		LottoPurchaseService lottoPurchaseService = new LottoPurchaseService(inputView, outputView, lottoTicketStore);
+		LottoGameService lottoGameService = new LottoGameService(inputView);
+		LottoResultCalculator lottoResultCalculator = new LottoResultCalculator();
+		LottoStatisticsService lottoStatisticsService = new LottoStatisticsService(lottoResultCalculator, outputView);
+		LottoController lottoController = new LottoController(lottoGameService, lottoPurchaseService,
+			lottoStatisticsService);
+
+		lottoController.play();
+	}


의존성을 관리하는 객체를 생성해보시길 추천드립니다.

jiffyin7 · 2024-11-05T09:55:09Z

src/main/java/lotto/constants/LottoConstantNumbers.java

+	LOTTO_PRICE(1_000),
+	MAX_PURCHASE_AMOUNT(100_000),
+	LOTTO_NUMBERS_COUNT(6),
+	MIN_LOTTO_NUMBER(1),
+	MAX_LOTTO_NUMBER(45);


숫자 가독성을 위해 '_'를 붙인 점 좋네요!

jiffyin7 · 2024-11-05T09:56:20Z

src/main/java/lotto/controller/LottoController.java

+	public void play() {
+		int purchaseAmount = lottoPurchaseService.purchaseForLottos();
+		List<Lotto> lottos = lottoPurchaseService.buyLottos(purchaseAmount);
+		WinningNumber winningNumber = lottoGameService.setWinningNumber();
+		LottoResult lottoResult = lottoGameService.playLottoGame(lottos, winningNumber);
+		lottoStatisticsService.summarizeStatistics(purchaseAmount, lottos, winningNumber);
+	}


service단을 객체가 아닌 기능별로 나누신 이유가 있을까요?

jiffyin7 · 2024-11-05T09:56:54Z

src/main/java/lotto/domain/Prize.java

+
+	public static Prize findPrize(int matchCount, boolean matchBonus) {
+		return Arrays.stream(values())
+			.filter(prize -> prize.matchCount == matchCount && prize.matchBonus == matchBonus)


코드 줄이 너무 길어서 두개의 필터로 나눠도 될것 같습니다.

jiffyin7 · 2024-11-05T09:57:25Z

src/main/java/lotto/exception/lottoticketexception/DuplicateException.java

예외처리를 클래스로 관리한 이유가 있을까요?

jiffyin7 · 2024-11-05T09:58:38Z

src/main/java/lotto/util/PurchaseAmountValidator.java

+	private boolean canDivideWithPrice(int purchaseAmount) {
+		return purchaseAmount % LottoConstantNumbers.LOTTO_PRICE.getValue() == 0;
+	}
+
+	private boolean isExceedMaxPurchaseAmount(int purchaseAmount) {
+		return purchaseAmount > LottoConstantNumbers.MAX_PURCHASE_AMOUNT.getValue();
+	}


각 boolean값을 지역변수로 가져와 한번에 throw하는 방안을 고려할 수 있을것 같습니다.

jiffyin7 · 2024-11-05T09:59:04Z

src/main/java/lotto/view/InputView.java

+	public int getPurchaseAmount() {
+		while (true) {
+			outputView.printPurchaseAmountMessage();
+			String input = readLine();
+
+			try {
+				return purchaseAmountValidator.validateInput(input);
+			} catch (InvalidPurchaseAmountException e) {
+				outputView.printInvalidPurchaseAmountMessage();
+			} catch (NegativePurchaseAmountException e) {
+				outputView.printInvalidPurchaseAmountMessage();
+			} catch (NotDivisibleByLottoPriceException e) {
+				outputView.printNotDivisibleByLottoPriceMessage();
+			} catch (MaxPurchaseExceedException e) {
+				outputView.printMaxPurchaseExceedMessage();
+			}
+		}
+	}
+
+	public List<Integer> getWinningNumbers() {
+		while (true) {
+			outputView.printToGetWinningNumbers();
+			String input = readLine();
+			List<Integer> numbers = winningNumberSeparator.splitByComma(input);
+			try {
+				return duplicateValidator.validateNoDuplicates(numbers);
+			} catch (NumberFormatException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (LottoNumberSizeException e) {
+				outputView.printInvalidLottoNumberSizeMessage();
+			} catch (OutOfRangeNumberException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (DuplicateException e) {
+				outputView.printDuplicateNumberMessage();
+			}
+		}
+	}
+
+	public int getBonusNumber(List<Integer> winningNumbers) {
+		while (true) {
+			outputView.printToGetBonusNumbers();
+			String input = readLine();
+
+			try {
+				int bonusNumber = Integer.parseInt(input);
+				duplicateValidator.validateNoOverlapWithWinningNumbers(bonusNumber, winningNumbers);
+				return bonusNumber;
+			} catch (NumberFormatException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (OutOfRangeNumberException e) {
+				outputView.printOutOfRangeNumberMessage();
+			} catch (DuplicateException e) {
+				outputView.printDuplicateNumberMessage();
+			}
+		}
+	}


나눠주세요.

jiffyin7 · 2024-11-05T09:59:30Z

src/main/java/lotto/view/OutputView.java

+	public void printPrizeStatistics(Map<Prize, Integer> prizeCounts) {
+		StringBuilder statisticBuilder = new StringBuilder();
+		statisticBuilder.append(WINNING_STATISTICS.getMessage())
+			.append('\n')
+			.append(DIVIDER.getMessage())
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_3.getMessage(), prizeCounts.get(Prize.FIFTH)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_4.getMessage(), prizeCounts.get(Prize.FOURTH)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_5.getMessage(), prizeCounts.get(Prize.THIRD)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_5_BONUS.getMessage(), prizeCounts.get(Prize.SECOND)))
+			.append('\n')
+			.append(String.format(ConsoleMessage.MATCH_6.getMessage(), prizeCounts.get(Prize.FIRST)))
+			.append('\n');
+		System.out.print(statisticBuilder);
+	}


print메서드를 좀더 제네릭하게 만들면 어떨까요?

jiffyin7 · 2024-11-05T10:00:22Z

src/test/java/lotto/LottoTest.java

아쉽습니다. 이번 주는 충분한 시간을 갖길 바랍니다.

ljhee92

안녕하세요 코드 리뷰 반사하고 갑니다!😁 급하게 하신 코드라고 하기엔 잘 하신 것 같아요! 너무 고생 많으셨고 이번주도 화이팅입니다!!👍

ljhee92 · 2024-11-06T05:52:34Z

src/main/java/lotto/controller/LottoController.java

+	}
+
+	public void play() {
+		int purchaseAmount = lottoPurchaseService.purchaseForLottos();


purchaseForLottos 라는 메서드명이 아래의 buyLottos와 혼동될 수 있을 것 같아요! 반환되는 amount가 포함된 메서드명으로 네이밍해보는
것은 어떠실까요?

ljhee92 · 2024-11-06T05:57:10Z

src/main/java/lotto/exception/ErrorConstants.java

+
+public enum ErrorConstants {
+	ERROR_MESSAGE_PREFIX("[ERROR]"),
+	SPACE(" ");


PREFIX에 공백을 함께 넣지 않고 따로 빼신 이유가 있으실까요?!

ljhee92 · 2024-11-06T06:04:28Z

src/main/java/lotto/service/LottoPurchaseService.java

@@ -0,0 +1,37 @@
+package lotto.service;
+
+import static lotto.constants.LottoConstantNumbers.*;


import시 와일드 카드 사용은 지양하는 것이 좋다고 합니다!

ljhee92 · 2024-11-06T06:11:06Z

src/main/java/lotto/service/LottoResultCalculator.java

+			prizeCountMap.put(prize, 0);
+		}
+		return prizeCountMap;
+	}


LottoResult 도메인 객체를 생성할 때와 로직이
겹치는 것 같은데 Service로 분리하신 이유가 있으실까요?

ljhee92 · 2024-11-06T06:14:26Z

src/main/java/lotto/util/LottoNumberSorter.java

+import java.util.List;
+
+public class LottoNumberSorter {
+	public List<Integer> sortInAscendingOrder(List<Integer> numbers) {


LottoNumberSorter는 로또 번호를 정렬하는 일만 하는데 객체로 만드신 이유가 있으신지 궁금합니다! 저는 개인적으로 util 클래스는 도메인의 로직과 연관되면 안 된다고 생각해서 클래스명을 NumberSorter 정도로 하면 더 좋지 않았을까 의견 드려봐요!

ljhee92 · 2024-11-06T06:16:15Z

src/main/java/lotto/util/PurchaseAmountValidator.java

+		if (numberValidator.isNegativeNumber(parsedInput)) {
+			throw new InvalidPurchaseAmountException();
+		}
+		if (!canDivideWithPrice(parsedInput)) {


if문의 조건 부분에 부정형은 가독성이 떨어지는 듯 한데 메서드명을 canNotDivideWithPrice로 해주고 내부 로직을 수정해주시는 것도 좋을 것 같아요!

ljhee92 · 2024-11-06T06:17:36Z

src/main/java/lotto/view/ConsoleMessage.java

+	public String getMessage() {
+		return message;
+	}
+}


콘솔 메시지를 Enum으로 이렇게 관리하는 방법도 좋은 것 같네요!

ljhee92 · 2024-11-06T06:19:31Z

src/main/java/lotto/view/InputView.java

+			}
+		}
+	}
+}


중복되는 while ~ try ~ catch 부분만 메서드로 나눠주셔도 조금 더 좋아질 것 같아요!

gyuoo added 30 commits November 4, 2024 21:05

docs(readme): update README.md

b73ca1c

docs(readme): add package structure

0a4fcb2

refactor(domain): move Lotto class to domain package

771c0e9

feat(exception): add ErrorMessage enum for error handling

b1c3f61

feat(exception): add LottoException base class for custom exceptions

33c2af8

feat(view): add ConsoleMessage enum for standardized console messages

edfa3fb

refactor(exception): update method name for consistency

49d5ec8

feat(domain): add Prize enum for lottery prize management

c28342d

feat(view): add InputView for handling user input

69a2fc0

feat(constants): add LottoConstantNumbers enum for managing lotto rel…

28459e9

…ated constants

feat(exception): add error messages for lotto purchase validation

996b213

feat(view): add ConsoleMessage enum for user prompts and outputs

d3a07a3

feat(view): add purchase amount message output

06615de

feat(view): add method to get purchase amount from user

9fa4490

refactor(exception): remove unnecessary codes

6849849

feat(constants): add ErrorConstants enum for error message management

90a90ee

feat(exception): add custom exceptions for purchase amount

2544898

refactor(exception): update exception

9682d41

refactor(exception): remove unnecessary parameter

7bba61a

feat(view): add input validation for purchase amount

5b829f4

feat(util): add purchase amount validation logic

5a59eac

feat(exception): add exception for lotto number counts

baf6ff2

feat(exception): add error messages

a61364f

refactor(exception): move package

e846966

refactor(exception): move package

1df5094

feat(exception): add exception for winning number range

6d4c0b7

refactor(exception): update import paths

223d57d

refactor(exception): move package

eb2c9ec

refactor(exception): move package

18db5b5

feat(util): add WinningNumberSeparator to split winning numbers by comma

81ef077

gyuoo added 24 commits November 5, 2024 01:12

docs(readme): mark checklists

add95e4

feat(domain): add LottoResult class

ad41f5e

fix(service): change return type

0dcda77

feat(controller): update lotto playing method

b8230ea

feat(domain): add getter for lotto entity

5addac6

feat(service): add LottoGameService class

12ba4ba

feat(domain): update Prize enum

202ed91

refactor(exception): add white space for error message

5e543c6

feat(util): add DuplicateValidator class

d6fdf49

feat(util): add validation to ensure bonus number does not overlap wi…

85f6555

…th winning numbers

refactor(view): update InputView class

1121ef1

refactor(service): update LottoGameService class

6524cd2

feat(domain): add getter for WinningNumber class

3bf9b52

feat(controller): add logic for all lotto games

7a45bd5

feat(util): add LottoResultCalculator class

623eb63

feat(service): add LottoStatisticsService class

f0fe0c4

refactor(service): seperate method

ab41dba

refactor(service): seperate method

2268065

feat(view): update OutputView class

6af6985

feat(application): update Application to run the lotto game

29ba68a

docs(readme): mark checklists

a83d0e4

docs(readme): add comments

b09fb49

docs(readme): update package structure

641d1aa

fix(view): remove unnecessary newline

f481890

gyuoo commented Nov 5, 2024

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jiffyin7 reviewed Nov 5, 2024

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hepheir mentioned this pull request Nov 5, 2024

[로또] 미션 제출합니다. smu-oss/w4-mission-too-many-commits#1

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[로또] 염규영 미션 제출합니다. #1344

[로또] 염규영 미션 제출합니다. #1344

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		@@ -0,0 +1,37 @@
		package lotto.service;

		import static lotto.constants.LottoConstantNumbers.*;

[로또] 염규영 미션 제출합니다. #1344

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[로또] 염규영 미션 제출합니다. #1344

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gyuoo commented Nov 4, 2024 • edited Loading

😥 자기 반성

📂 패키지 구조

📌 계획

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gyuoo commented Nov 4, 2024 •

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