[알고리즘] 피보나치수
long long fibonacci(int n) { if(n==0) return 0; if(n==1) return 1; return fibonacci(n-2) + fibonacci(n-1); } int main() { int testCase = 10; long long testAnswer = fibonacci(testCase); cout<<testAnswer; }...
Category: IT/개발
[JAVA8] Stream API 사용 예 정리중
public String findKim(String[] seoul){ //x에 김서방의 위치를 저장하세요. int x = 0; x = IntStream.range(0, seoul.length) .filter(idx -> seoul[idx].equals(“Kim”)) .findFirst().getAsInt(); return “김서방은 “+ x + “에 있다”; } class Divisible...
[디자인 패턴] 팩토리 패턴
JAVA EE로 팩토리 패턴을 구현 public class EventProducer{ @Produces public String getMessage(){ return “메시지입니다”; } } public class EventService{ @Inject private String message; public void startService(){ System.out.println(“서비스 호출::”+message); } }...
[디자인 패턴] 싱글톤 구현
public class MySingleton { private static MySingleton instance; private MySingleton(){} public static synchronized MySingleton getInstance(){ // 경합조건 해결을 위해 synchronized 추가 if(instance == null){ instance = new MySingleton(); } return...
[Android] Cannot set the value of read-only property ‘outputFile’ for ApkVariantOutputImpl_Decorated
안드로이드 Gradle 플러그인이 3.0.0 으로 업데이트되면서 마이그레이션 이슈가 생겼다. https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration.html#variant_api gradle 빌드파일을 열어 아래와 같이 변경해준다. Use all() instead of each() Use outputFileName instead of output.outputFile if you change only file name (that is your case) 종속성...
IntelliJ IDEA 2018.1 RELEASED! / 바뀐점 알아보기
Hello KyoBin, Ready for a change? Please meet IntelliJ IDEA 2018.1 – our first major update of this year! This new release brings with it significant improvements to supported languages, frameworks, version...
[GUAVA] Predicate 사용예
<!– https://mvnrepository.com/artifact/com.google.guava/guava –> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>24.0-jre</version> </dependency> List<OnlineMenuVO> selectMenu2List = this.uiMainService.selectMenu2List(this.custCoCd); Predicate<OnlineMenuVO> lvl1ListPredicate = new Predicate<OnlineMenuVO>() { @Override public boolean apply(@Nullable OnlineMenuVO onlineMenuVO) { if(onlineMenuVO.getClsLvl() == 1){ return true;...
[자료구조] Binary Tree Level Order Traversal
바이너리 트리 레벨선회 구현하기 Given a binary tree, return the level order traversal of its nodes’ values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 3 /...
[자료구조] Binary Tree Postorder Traversal
바이너리 트리 후위선회 구현하기 Given a binary tree, return the postorder traversal of its nodes’ values. For example: Given binary tree [1,null,2,3], 1 \ 2 / 3 return [3,2,1]. Note: Recursive solution is trivial,...
[자료구조] Binary Tree Inorder Traversal
바이너리 트리 중위순회 구현하기 Given a binary tree, return the inorder traversal of its nodes’ values. For example: Given binary tree [1,null,2,3], 1 \ 2 / 3 return [1,3,2]. Note: Recursive solution is trivial, could...
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