묻고 답해요

176만명의 커뮤니티!! 함께 토론해봐요.

고립형 입출력

해결됨

개발자를 위한 컴퓨터공학 1: 혼자 공부하는 컴퓨터구조 + 운영체제

메모리 맵 입출력 방식에 메모리와 입출력 장치에 같은 명령어 사용 가능이라고 하셨는데 명령어에 입출력 전용 명령어도 포함 인가요??

컴퓨터-구조
기술면접

zkzk7290 2023-07-10T13:53:41.534Z 댓글 1 좋아요 0 조회수 597

setup 문법질문이요!!

미해결

Vue3 완벽 마스터: 기초부터 실전까지 - "기본편"

vue.js

corp 2023-07-10T13:48:47.522Z 댓글 1 좋아요 0 조회수 464

[긴급] 플러터 앱 개발 시 안드로이드 에뷸레이터에서 아래와 같은 에러가 납니다

미해결

[코드팩토리] [초급] Flutter 3.0 앱 개발 - 10개의 프로젝트로 오늘 초보 탈출!

선생님 레슨, 책, 유튜브 잘 보고 있습니다. 플러터 챗 봇 앱 만들었는데 아이폰 시뮬레이터에서는 잘 돌아가는데 안드로이드 에뷸레이터에서는 아래와 같은 에러가 뜨고 채팅 창에 글자도 입력이 안되네요 현재 구글 플레이 스토어에 출시는 한 상태입니다. 보시면 전송 버튼을 눌러도 아무런 응답이 없습니다. 어떻게 해결하면 좋을까요? 앱 이름은 '친절한 한쌤' 입니다. 빠른 답변 늘 감사합니다... Launching lib/main.dart on sdk gphone64 x86 64 in debug mode... Running Gradle task 'assembleDebug'... ✓ Built build/app/outputs/flutter-apk/app-debug.apk. Debug service listening on ws://127.0.0.1:53849/OrbnIHJyefU=/ws Syncing files to device sdk gphone64 x86 64... I/ImeTracker( 4545): com.aihanssam.kindteacherhan:a09ac563: onRequestShow at ORIGIN_CLIENT_SHOW_SOFT_INPUT reason SHOW_SOFT_INPUT D/InputMethodManager( 4545): showSoftInput() view=io.flutter.embedding.android.FlutterView{86562a2 VFE...... .F....ID 0,0-1080,1857 #1 aid=1073741824} flags=0 reason=SHOW_SOFT_INPUT I/AssistStructure( 4545): Flattened final assist data: 472 bytes, containing 1 windows, 3 views D/EGL_emulation( 4545): app_time_stats: avg=15687.04ms min=37.24ms max=46608.22ms count=3 D/InsetsController( 4545): show(ime(), fromIme=true) I/ImeTracker( 4545): com.aihanssam.kindteacherhan:a09ac563: onShown D/EGL_emulation( 4545): app_time_stats: avg=205.99ms min=65.45ms max=322.47ms count=5 D/EGL_emulation( 4545): app_time_stats: avg=293.51ms min=39.90ms max=566.13ms count=4 D/EGL_emulation( 4545): app_time_stats: avg=500.04ms min=499.71ms max=500.36ms count=2 D/EGL_emulation( 4545): app_time_stats: avg=499.55ms min=483.14ms max=516.56ms count=3 D/EGL_emulation( 4545): app_time_stats: avg=500.43ms min=499.89ms max=500.97ms count=2 D/EGL_emulation( 4545): app_time_stats: avg=500.48ms min=500.24ms max=500.72ms count=2

flutter
클론코딩

amorvo 2023-07-10T13:42:17.250Z 댓글 1 좋아요 0 조회수 1446

set 안에 boolean

미해결

프로그래밍 시작하기 : 파이썬 입문 (Inflearn Original)

a = {1, 'Hello', True, 1.233 } print (a) 를 하니 True만 제외하고 나오는데요, boolean 타입은 set에서 사용이 불가능한 걸까요?

python

주윤정 2023-07-10T13:27:10.734Z 댓글 1 좋아요 0 조회수 353

요소공개트리거 활용

미해결

실무자를 위한 구글애널리틱스(GA4+GTM) 활용법(26년 Update)

요소공개트리거 활용 파트 강의 듣다가 질문남깁니다. 중앙 배너에 노출된 사람이 중앙 배너를 클릭했는지 알아보려면 매개변수를 어떻게 해야하나요?

Google-Analytics
Google-Tag-Manager
데이터-리터러시
GA4

yoonji 2023-07-10T13:22:15.617Z 댓글 1 좋아요 0 조회수 365

div에 on:click 이벤트 붙일 때 on:key와 관련된 이벤트를 같이 사용해야하나요?

미해결

Svelte.js 입문 가이드

visible, non-interactive elements with an on:click event must be accompanied by an on:keydown, on:keyup, or on:keypress event div에 on:click를 붙일 때 위와 같은 문구가 표시됩니다. on:key와 관련된 이벤트를 붙이니까 해당 문구가 사라지던데 꼭 그렇게 사용해야 하나요? 제가 div에 onclick 이벤트를 자주 쓰는데 div가 아닌 button을 사용해야 할 까요?

svelte

best fat person 2023-07-10T13:15:33.856Z 댓글 1 좋아요 1 조회수 959

숫자 key update 함수

미해결

프로그래밍 시작하기 : 파이썬 입문 (Inflearn Original)

a = {0: 'Hello World'} a.update ( 0 = 'Hello Python') 로 돌리면 오류가 발생하는데, 숫자 key에서는 update 함수 사용이 불가한가요?

python

주윤정 2023-07-10T13:15:13.534Z 댓글 1 좋아요 0 조회수 448

state is not defined 에러가 뜹니다

해결됨

[리뉴얼] React로 NodeBird SNS 만들기

이 에러는 왜 발생한 건가요? 구글에 검색도 해봤는데 안나오네요 도와주세요 ㅠ reducers/user.js 코드입니다 export const initialState = { } export const loginAction = (data) => { return { type: 'LOG_IN', data, } } export const logoutAction = () => { return { type: 'LOG_OUT', } } const reducer = (State = initialState, action) => { switch (action.type) { case 'LOG_IN': { return { ...state, isLoggedIn: true, user: action.data, }; } case 'LOG_OUT': { return { ...state, isLoggedIn: false, user: null, }; } default: return state; } }; export default reducer; 터미널창 오류 메세지 입니다 error - reducers/user.js (37:12) @ reducer error - ReferenceError: state is not defined at reducer (webpack-internal:///./reducers/user.js:39:13) at /Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/node_modules/redux/lib/redux.js:476:24 at Array.forEach (<anonymous>) at assertReducerShape (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/node_modules/redux/lib/redux.js:474:25) at combineReducers (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/node_modules/redux/lib/redux.js:539:5) at eval (webpack-internal:///./reducers/index.js:15:75) at Object../reducers/index.js (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/.next/server/pages/_app.js:33:1) at __webpack_require__ (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/.next/server/webpack-runtime.js:33:42) at eval (webpack-internal:///./store/configureStore.js:9:67) at Object../store/configureStore.js (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/.next/server/pages/_app.js:66:1) { page: '/' } 35 | } 36 | default: > 37 | return state; | ^ 38 | 39 | } 40 | }; event - compiled client and server successfully in 100 ms (1518 modules) 4. WrappedApp created new store with withRedux(NodeBird) { initialState: undefined, initialStateFromGSPorGSSR: undefined } ReferenceError: state is not defined at reducer (webpack-internal:///./reducers/user.js:39:13) at /Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/node_modules/redux/lib/redux.js:476:24 at Array.forEach (<anonymous>) at assertReducerShape (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/node_modules/redux/lib/redux.js:474:25) at combineReducers (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/node_modules/redux/lib/redux.js:539:5) at eval (webpack-internal:///./reducers/index.js:15:75) at Object../reducers/index.js (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/.next/server/pages/_app.js:33:1) at __webpack_require__ (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/.next/server/webpack-runtime.js:33:42) at eval (webpack-internal:///./store/configureStore.js:9:67) at Object../store/configureStore.js (/Users/hyeonyeongjeong/Documents/2023project/nodebird/prepare/front/.next/server/pages/_app.js:66:1) http://localhost:3060 에 뜬 오류 입니다 Server Error ReferenceError: state is not defined This error happened while generating the page. Any console logs will be displayed in the terminal window. Source reducers/user.js (35:12) @ reducer 33 | } 34 | default: > 35 | return state; | ^ 36 | 37 | } 38 | };

react
redux
node.js
express
next.js

정현영 2023-07-10T12:53:35.157Z 댓글 1 좋아요 0 조회수 738

Mysql 연결 문제..

미해결

[NarP Series] MVC 프레임워크는 내 손에 [나프1탄]

Could not connect to New MySQL. Error creating SQL Model Connection connection to New MySQL. (Error: Could not create connection to database server.) Could not create connection to database server. Error creating JDBC Connection connection to New MySQL. (Error: Could not create connection to database server.) Could not create connection to database server. 계속 이 에러가 뜨면서 Mysql 연결이 안됩니다.. 구글링 해봤는데도 해결이 안되네요..

jsp
mysql
mvc
ajax
pojo

도댕 2023-07-10T12:53:29.588Z 댓글 2 좋아요 0 조회수 704

튜플의 수정

미해결

프로그래밍 시작하기 : 파이썬 입문 (Inflearn Original)

튜플을 리스트로 변환하여 수정한 후 튜플로 다시 변환해도 사용에 문제가 없을까요? 예를 들어, a = (1, 2, 3) list_a = list(a) list_a [0] = 2 print(list_a) = [2, 2, 3] tuple_a = tuple(list_a) print(tuple_a) = (2, 2, 3) 또한, 튜플 내에 있는 리스트 수정이 가능한 것이 맞을까요? 코드 돌려보았을 때는 가능해 보이는데, 이 경우 불변하는 정보를 담는다는 튜플의 의도에 반하는 게 아닌가 싶어 여쭤봅니다ㅎㅎ; 예를 들어, b = (1, [2, 3]) b [1][0] = 4 print (b) = (1, [4, 3])

python

주윤정 2023-07-10T12:39:59.009Z 댓글 1 좋아요 0 조회수 326

여러 계층의 상속관계 질문

해결됨

자바 ORM 표준 JPA 프로그래밍 - 기본편

안녕하세요. 상속관계 매핑을 할 때 예를 들어 위와 같이 Item을 상속받는 Book, Album, Movie, TVSerise의 4개의 품목이 있다고 했을 때, 비슷한 속성끼리 중간에 묶는 방법에 대해 질문드리고 싶습니다. 상속관계를 한 단계 더 쓰고 싶은 이유는 일부 항목들끼리는 자주 엮어서 조회할 일이 있는데 그 때마다 두 객체를 모두 불러오는 게 번거롭게 느껴져서 입니다. 이전에 비슷한 질문을 드렸었는데 김영한 강사님께서 이런 경우 상속관계보다는 연관관계를 사용하기를 추천하신다고 말씀 주셨었어요. 조금만 더 자세히 설명 부탁드리겠습니다. 감사합니다! ps. 다른 글에서 추천해주신 draw.io 좋아요. 감사합니다.

java
jpa

아름 2023-07-10T12:26:55.604Z 댓글 1 좋아요 0 조회수 678

6-10. 어셈블리 질문!

해결됨

홍정모의 따라하며 배우는 C언어

안녕하세요. 강의에서 일반문과 그것의 축약문의 어셈블리 비교를 통해 효율성을 체크했습니다. 그냥 보면 둘은 똑같아 보였는데, 자세히 보니 끝에서 두 자리가 다르더군요. 이건 제 단계에서 크게 신경쓰지 않아도 되는 것 같은데, 그래도 궁금해서 질문드립니다. 일반문과 축약문의 어셈블리가 완전 같지는 않은데, 저 정도는 효율성을 따지는데 있어 굳이 신경 쓰지 않아도 되는 건가요?

이재완 2023-07-10T12:24:56.695Z 댓글 2 좋아요 2 조회수 464

save.jsp 오류

미해결

스프링 MVC 1편 - 백엔드 웹 개발 핵심 기술

[질문 템플릿] 1. 강의 내용과 관련된 질문인가요? 예 2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? 예 3. 질문 잘하기 메뉴얼을 읽어보셨나요? 예 [질문 내용] 여기에 질문 내용을 남겨주세요. new-form.jsp는 잘 접속이 되는데 전송을 누르면 아래와 같이 오류가 발생합니다. "C:\Program Files\Java\jdk-17.0.2\bin\java.exe" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2022.3.2\lib\idea_rt.jar=64020:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2022.3.2\bin" -Dfile.encoding=UTF-8 -classpath 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hello.servlet.ServletApplication . ____ _ /\\ / ___'_ __ ( _)_ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.0.6) 2023-07-10T21:21:29.054+09:00 INFO 18224 --- [ main] hello.servlet.ServletApplication : Starting ServletApplication using Java 17.0.2 with PID 18224 (C:\Users\user\Desktop\여름방학\mvc1\servlet\servlet\out\production\classes started by user in C:\Users\user\Desktop\여름방학\mvc1\servlet\servlet) 2023-07-10T21:21:29.057+09:00 INFO 18224 --- [ main] hello.servlet.ServletApplication : No active profile set, falling back to 1 default profile: "default" 2023-07-10T21:21:29.690+09:00 INFO 18224 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode. 2023-07-10T21:21:29.722+09:00 INFO 18224 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 21 ms. Found 0 JPA repository interfaces. 2023-07-10T21:21:30.369+09:00 INFO 18224 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2023-07-10T21:21:30.380+09:00 INFO 18224 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2023-07-10T21:21:30.380+09:00 INFO 18224 --- [ main] o.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/10.1.8] 2023-07-10T21:21:30.613+09:00 INFO 18224 --- [ main] org.apache.jasper.servlet.TldScanner : At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. 2023-07-10T21:21:30.622+09:00 INFO 18224 --- [ main] o.a.c.c.C.[Tomcat].[ localhost ].[/] : Initializing Spring embedded WebApplicationContext 2023-07-10T21:21:30.623+09:00 INFO 18224 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1515 ms 2023-07-10T21:21:30.874+09:00 INFO 18224 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... 2023-07-10T21:21:31.055+09:00 INFO 18224 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Added connection conn0: url=jdbc:h2:mem:2a429fff-9c3c-4c40-906c-f7cb210a3f6a user=SA 2023-07-10T21:21:31.057+09:00 INFO 18224 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed. 2023-07-10T21:21:31.109+09:00 INFO 18224 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default] 2023-07-10T21:21:31.171+09:00 INFO 18224 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 6.1.7.Final 2023-07-10T21:21:31.473+09:00 INFO 18224 --- [ main] SQL dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect 2023-07-10T21:21:31.720+09:00 INFO 18224 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform] 2023-07-10T21:21:31.734+09:00 INFO 18224 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default' 2023-07-10T21:21:31.767+09:00 WARN 18224 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning 2023-07-10T21:21:31.964+09:00 INFO 18224 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page: ServletContext resource [/index.html] 2023-07-10T21:21:32.242+09:00 INFO 18224 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2023-07-10T21:21:32.251+09:00 INFO 18224 --- [ main] hello.servlet.ServletApplication : Started ServletApplication in 3.565 seconds (process running for 3.966) 2023-07-10T21:21:38.052+09:00 DEBUG 18224 --- [nio-8080-exec-1] o.a.coyote.http11.Http11InputBuffer : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [0] 2023-07-10T21:21:38.053+09:00 DEBUG 18224 --- [nio-8080-exec-1] o.a.coyote.http11.Http11InputBuffer : Received [POST /jsp/members/save.jsp HTTP/1.1 Host: localhost:8080 Connection: keep-alive Content-Length: 19 Cache-Control: max-age=0 sec-ch-ua: "Not.A/Brand";v="8", "Chromium";v="114", "Google Chrome";v="114" sec-ch-ua-mobile: ?0 sec-ch-ua-platform: "Windows" Upgrade-Insecure-Requests: 1 Origin: http://localhost:8080 Content-Type: application/x-www-form-urlencoded User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 Sec-Fetch-Site: same-origin Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Referer: http://localhost:8080/jsp/members/new-form.jsp Accept-Encoding: gzip, deflate, br Accept-Language: ko-KR,ko;q=0.9,en-US;q=0.8,en;q=0.7 Cookie: JSESSIONID=3F23CBF50B03D193E74C819FC83D3488 username=kim&age=20] 2023-07-10T21:21:38.623+09:00 ERROR 18224 --- [nio-8080-exec-1] o.a.c.c.C.[.[ localhost ].[/].[jsp] : Servlet.service() for servlet [jsp] in context with path [] threw exception [Unable to compile class for JSP: An error occurred at line: [14] in the generated java file: [C:\Users\user\AppData\Local\Temp\tomcat.8080.1494250641129783002\work\Tomcat\ localhost \ROOT\org\apache\jsp\jsp\members\save_jsp.java] Only a type can be imported. hello.servlet.domain.member.MemberRepository resolves to a package An error occurred at line: [15] in the generated java file: [C:\Users\user\AppData\Local\Temp\tomcat.8080.1494250641129783002\work\Tomcat\ localhost \ROOT\org\apache\jsp\jsp\members\save_jsp.java] Only a type can be imported. hello.servlet.domain.member.Member resolves to a package An error occurred at line: [6] in the jsp file: [/jsp/members/save.jsp] MemberRepository cannot be resolved to a type 3: <%@ page contentType="text/html;charset=UTF-8" language="java" %> 4: <% 5: // request, response 사용 가능 6: MemberRepository memberRepository = MemberRepository.getInstance(); 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); An error occurred at line: [6] in the jsp file: [/jsp/members/save.jsp] MemberRepository cannot be resolved 3: <%@ page contentType="text/html;charset=UTF-8" language="java" %> 4: <% 5: // request, response 사용 가능 6: MemberRepository memberRepository = MemberRepository.getInstance(); 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); An error occurred at line: [10] in the jsp file: [/jsp/members/save.jsp] Member cannot be resolved to a type 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); 10: Member member = new Member(username, age); 11: System.out.println("member = " + member); 12: memberRepository.save (member); 13: %> An error occurred at line: [10] in the jsp file: [/jsp/members/save.jsp] Member cannot be resolved to a type 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); 10: Member member = new Member(username, age); 11: System.out.println("member = " + member); 12: memberRepository.save (member); 13: %> Stacktrace:] with root cause org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: [14] in the generated java file: [C:\Users\user\AppData\Local\Temp\tomcat.8080.1494250641129783002\work\Tomcat\ localhost \ROOT\org\apache\jsp\jsp\members\save_jsp.java] Only a type can be imported. hello.servlet.domain.member.MemberRepository resolves to a package An error occurred at line: [15] in the generated java file: [C:\Users\user\AppData\Local\Temp\tomcat.8080.1494250641129783002\work\Tomcat\ localhost \ROOT\org\apache\jsp\jsp\members\save_jsp.java] Only a type can be imported. hello.servlet.domain.member.Member resolves to a package An error occurred at line: [6] in the jsp file: [/jsp/members/save.jsp] MemberRepository cannot be resolved to a type 3: <%@ page contentType="text/html;charset=UTF-8" language="java" %> 4: <% 5: // request, response 사용 가능 6: MemberRepository memberRepository = MemberRepository.getInstance(); 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); An error occurred at line: [6] in the jsp file: [/jsp/members/save.jsp] MemberRepository cannot be resolved 3: <%@ page contentType="text/html;charset=UTF-8" language="java" %> 4: <% 5: // request, response 사용 가능 6: MemberRepository memberRepository = MemberRepository.getInstance(); 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); An error occurred at line: [10] in the jsp file: [/jsp/members/save.jsp] Member cannot be resolved to a type 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); 10: Member member = new Member(username, age); 11: System.out.println("member = " + member); 12: memberRepository.save (member); 13: %> An error occurred at line: [10] in the jsp file: [/jsp/members/save.jsp] Member cannot be resolved to a type 7: System.out.println("save.jsp"); 8: String username = request.getParameter("username"); 9: int age = Integer.parseInt(request.getParameter("age")); 10: Member member = new Member(username, age); 11: System.out.println("member = " + member); 12: memberRepository.save (member); 13: %> Stacktrace: at org.apache.jasper.compiler.DefaultErrorHandler.javacError( DefaultErrorHandler.java:102 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.compiler.ErrorDispatcher.javacError( ErrorDispatcher.java:213 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.compiler.JDTCompiler.generateClass( JDTCompiler.java:513 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.compiler.Compiler.compile( Compiler.java:402 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.compiler.Compiler.compile( Compiler.java:372 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.compiler.Compiler.compile( Compiler.java:356 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.JspCompilationContext.compile( JspCompilationContext.java:603 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.servlet.JspServletWrapper.service( JspServletWrapper.java:396 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.servlet.JspServlet.serviceJspFile( JspServlet.java:380 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at org.apache.jasper.servlet.JspServlet.service( JspServlet.java:328 ) ~[tomcat-embed-jasper-10.1.8.jar:10.1.8] at jakarta.servlet.http.HttpServlet.service( HttpServlet.java:614 ) ~[jakarta.servlet-api-6.0.0.jar:6.0.0] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:205 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.tomcat.websocket.server.WsFilter.doFilter( WsFilter.java:51 ) ~[tomcat-embed-websocket-10.1.8.jar:10.1.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.springframework.web.filter.RequestContextFilter.doFilterInternal( RequestContextFilter.java:100 ) ~[spring-web-6.0.8.jar:6.0.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:116 ) ~[spring-web-6.0.8.jar:6.0.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.springframework.web.filter.FormContentFilter.doFilterInternal( FormContentFilter.java:93 ) ~[spring-web-6.0.8.jar:6.0.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:116 ) ~[spring-web-6.0.8.jar:6.0.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal( CharacterEncodingFilter.java:201 ) ~[spring-web-6.0.8.jar:6.0.8] at org.springframework.web.filter.OncePerRequestFilter.doFilter( OncePerRequestFilter.java:116 ) ~[spring-web-6.0.8.jar:6.0.8] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:174 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.ApplicationFilterChain.doFilter( ApplicationFilterChain.java:149 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.StandardWrapperValve.invoke( StandardWrapperValve.java:166 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.StandardContextValve.invoke( StandardContextValve.java:90 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.authenticator.AuthenticatorBase.invoke( AuthenticatorBase.java:482 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:115 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.valves.ErrorReportValve.invoke( ErrorReportValve.java:93 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.core.StandardEngineValve.invoke( StandardEngineValve.java:74 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.catalina.connector.CoyoteAdapter.service( CoyoteAdapter.java:341 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.coyote.http11.Http11Processor.service( Http11Processor.java:390 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.coyote.AbstractProcessorLight.process( AbstractProcessorLight.java:63 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process( AbstractProtocol.java:894 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.tomcat.util.net .NioEndpoint$SocketProcessor.doRun( NioEndpoint.java:1741 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.tomcat.util.net.SocketProcessorBase.run ( SocketProcessorBase.java:52 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker( ThreadPoolExecutor.java:1191 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run( ThreadPoolExecutor.java:659 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run( TaskThread.java:61 ) ~[tomcat-embed-core-10.1.8.jar:10.1.8] at java.base/java.lang.Thread.run( Thread.java:833 ) ~[na:na] 2023-07-10T21:21:38.633+09:00 INFO 18224 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[ localhost ].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet' 2023-07-10T21:21:38.634+09:00 INFO 18224 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet' 2023-07-10T21:21:38.635+09:00 INFO 18224 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms 2023-07-10T21:21:38.743+09:00 DEBUG 18224 --- [nio-8080-exec-1] o.apache.coyote.http11.Http11Processor : Socket: [ org.apache.tomcat.util.net .NioEndpoint$NioSocketWrapper@53f4c2e: org.apache.tomcat.util.net .NioChannel@1e491a57:java.nio.channels.SocketChannel[connected local=/[0:0:0:0:0:0:0:1]:8080 remote=/[0:0:0:0:0:0:0:1]:64023]], Status in: [OPEN_READ], State out: [CLOSED]

spring
mvc

감귤 2023-07-10T12:23:17.390Z 댓글 1 좋아요 0 조회수 1008

깃허브

미해결

따라하며 배우는 노드, 리액트 시리즈 - 기본 강의

PS C:\Users\user\Documents\boiler-plate> git push -u origin main fatal: failed to load library 'libcurl-4.dll' 이럴 경우엔 어떻게 깃허브 연결 할 수 있을까요?

react
node.js

002seojin 2023-07-10T12:18:59.859Z 댓글 1 좋아요 0 조회수 1067

ApolloError: null value in column "writer" of relation "board" violates not-null constraint

해결됨

[코드캠프] 부트캠프에서 만든 고농축 프론트엔드 코스

하드코딩으로 값을 넣었을때는 잘진행이 되었는데요ㅠㅠ 안에 값을 지정하니 에러가 계속뜨네요 아마 이 부분 에서 고쳐야 할 점이 있는 것 같은데 똑같이 작성을 한 것 같음에도 동작이 안되서 질문드려봅니다

react
node.js
seo
graphql
next.js

김윤원 2023-07-10T12:12:43.339Z 댓글 2 좋아요 0 조회수 598

sumArray()재귀함수 이해가 안됩니다!

해결됨

그림으로 쉽게 배우는 자료구조와 알고리즘 (기본편)

sumArray 함수에서 return 값인 sumArray(arr.slice(0, -1)) + arr[arr.length - 1] 구문이 이해가 잘 안되는데 arr.slice(0, -1) 은 [1, 2, 3, 4]이고 arr[arr.length - 1]은 5인데 [1, 2, 3, 4] + 5 값으로는 1, 2, 3, 4, 55 나와야 되는게 아닌가요?? 어째서 sumArray([1, 2, 3, 4])를 줬다고 해서 1 + 2 + 3 + 4 가 되는 지 모르겠습니다. 만약 그렇게 되려면 아래 같은 로직이라고 있어야되는거 아닌가요?? let plus = 0; arr.forEach(el => { plus += el }); 도저히 이해가 안되네요 도와주시면 감사하겠습니다!!

알고리즘
재귀함수
재귀

락토 2023-07-10T12:01:57.726Z 댓글 2 좋아요 1 조회수 435

프로바이더와 싱글톤의 차이

미해결

[코드팩토리] [중급] Flutter 진짜 실전! 상태관리, 캐시관리, Code Generation, GoRouter, 인증로직 등 중수가 되기 위한 필수 스킬들!

프로바이더를 보고 있다보니 싱글톤이 생각나는데, 둘 간의 차이가 있을까요? 있다면 어떤 차이가 있을 까요?

flutter
하이브리드-앱

Seung Min Liang 2023-07-10T11:52:32.999Z 댓글 1 좋아요 0 조회수 534

.ipynb_checkpoints 폴더 질문드립니다.

미해결

프로그래밍 시작하기 : 도전! 45가지 파이썬 기초 문법 실습 (Inflearn Original)

안녕하세요. 주피터 노트북 관련해서 궁금한 점이 있는데요, 제가 처음에 지정해놓은 경로에 파일을 두고, 주피터 노트북 실행해서 작업을 하닥, 주피터 노트북 경로 파일 폴더를 열어보니, 아래와 같이 .ipynb_checkpoints라는 폴더가 만들어져있더라구요. 해당 폴더 안에 들어가보면 원래의 파일들이 해당 폴더 안에 또 만들어져있는데, 이거는 자동으로 백업해주는 기능인가요?

python

눈물의초보 2023-07-10T11:28:47.397Z 댓글 1 좋아요 0 조회수 3097

1-H 코드 질문있습니다

미해결

10주완성 C++ 코딩테스트 | 알고리즘 코딩테스트

안녕하십니까 큰돌님 강의 보기 전에 prefix sum 이 기억이 안나서 혼자 풀어봤는데 어디에서 틀린 건지 모르겠습니다 ㅜㅠ http://boj.kr/b45a32d5c6db4cda94b0a3177e17291a

c++
코딩-테스트

대기업목표 2023-07-10T11:15:12.333Z 댓글 1 좋아요 0 조회수 413

로드맵 관련

미해결

[게임 프로그래머 입문 올인원] C++ & 자료구조/알고리즘 & STL & 게임 수학 & Windows API & 게임 서버

기존에 있던 강의랑 겹치는게 있고 안겹치는게 있는거 같은데 이 강의를 듣고 다음 강의는 어떤걸 들어야 할까요?

c++
네트워크
ue-blueprint
게임수학
windows-api

황소코끼리 2023-07-10T11:13:29.011Z 댓글 1 좋아요 0 조회수 485

묻고 답해요

고립형 입출력

setup 문법질문이요!!

[긴급] 플러터 앱 개발 시 안드로이드 에뷸레이터에서 아래와 같은 에러가 납니다

set 안에 boolean

요소공개트리거 활용

div에 on:click 이벤트 붙일 때 on:key와 관련된 이벤트를 같이 사용해야하나요?

숫자 key update 함수

state is not defined 에러가 뜹니다

Mysql 연결 문제..

튜플의 수정

여러 계층의 상속관계 질문

6-10. 어셈블리 질문!

save.jsp 오류

깃허브

ApolloError: null value in column "writer" of relation "board" violates not-null constraint

sumArray()재귀함수 이해가 안됩니다!

프로바이더와 싱글톤의 차이

.ipynb_checkpoints 폴더 질문드립니다.

1-H 코드 질문있습니다

로드맵 관련

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