선생님, 수업 잘 듣고 있습니다.   책을 보면, CounterVectorizer()나 StandardScaler, MinMaxScaler 사용을 하면, 학습/테스트 데이터 적용시 동일한 object를 사용해야 한다고 적혀져 있는데요. 만약, 학습을 다 완료하고 해당 모델로 서비스에 적용하려고 해도 동일한 object를 사용해야 하는 것인가요? 그럼, 대체적으로 어떻게 관리해서 사용하게 되는지 궁금합니다^^   특히나, 텍스트분석의 경우는 학습시 사용되지 않았던 단어들이 서비스시에 나올 수 도 있을거 같거든요. 신조어같은게 계속 늘어나니까요.... 이런경우도 어떻게 처리하는지 궁금합니다~   감사합니다^^    

  listener2의 경우 라디오에서 클릭이 일어나면 checkedTextView4.setOnClickListener(listener2)checkedTextView5.setOnClickListener(listener2)checkedTextView6.setOnClickListener(listener2 에 의해서 다른 라디오 버튼들이 checkedTextView4.isChecked=falsecheckedTextView5.isChecked=falsecheckedTextView6.isChecked=false 로 인해 false로 초기화 되는 것을 알겠습니다. 하지만 listener1의 경우는 잘 이해가 가지 않습니다. 들어온 값이 true이면 true인 것인데 왜 false로 초기화를 하는지 잘 모르겠습니다.  

ksoomin25@gmail.com입니다! 감사합니다!

typing 플러그인에서  글자를 한번 타이핑을 수행하고, 다시 반복해서 지속적으로 타이핑 에니메이션이 수행되었으면 합니다.  방법이 있는지요?

16강에서 소개해주시는 판다스 롤링 및 익스팬딩관련 웹사이트가 지금 바뀐것 같은데   https://pandas.pydata.org/pandas-docs/stable/user_guide/window.html#rolling-window     여기에서 찾으면 되는 거 맞나요??

CORS Referer Policy와 관련하여 질문드립니다. 강사님의 강의에 사용된 Chrome Version은 85이하 버전이라 CORS Referer Policy가 no-referrer-when-downgrade로  설정되어 있는것을 확인했습니다. 그런데 강의를 수강하는 현재는 Google Chrome 정책이 변경되어 최신버전의 Chrome의 경우 Referer Policy는 default가 strict-origin-when-cross-origin으로 변경되었습니다. 그래서 node.js backend server 주소 localhost:3000 으로 API 호출시 요청은 가고 서버에서 로그도 확인이 가능하지만 Network 패널에서 200 응답이 오지 않아서  Chrome에서 제공하는 CORS Plugin 을 설치하고나서 다시 Backend Server로 API 호출을 해보았는데 Network 패널에서 200 응답은 확인되지만 Response 부분을 확인하려고하면 No resource with given identifler found 가 표시되어 확인이 불가능하고 API 호출후 화면도 reload 되어 <p>태그에 선언한 내용도 바로 사라집니다. 첨부한 스크린샷을 보면 vue-til-server에 cors 설정에 대한 내용도 확인되지만 지금처럼 Network 패널 Response tab 에서 response data를 확인할수 있도록 하거나 API 호출후 화면이 새로고침되는 현상을 방지하려면 어떤 설정을 추가해야 할까요? 답변기다리겠습니다. 감사합니다.

- 학습 관련 질문을 남겨주세요. 상세히 작성하면 더 좋아요! - 먼저 유사한 질문이 있었는지 검색해보세요. - 서로 예의를 지키며 존중하는 문화를 만들어가요. - 잠깐! 인프런 서비스 운영 관련 문의는 1:1 문의하기를 이용해주세요.   위와 같은 에러가 나오는 데 인터넷 찾아 봤는데 이유를 해결 방법을 모르겠습니다.

따라 하고 있는데 이 부분에서 막힙니다  

안녕하세요.   웹사이트 전체 배경색을 흰색이 아니라 검은색, 분홍색 등 다른 색깔로 했을 시 동영상 이미지들을 뽑아내려면 동영상 배경이 transparent하게 png로 전부 뽑아내야 하나요? 웹사이트 배경색이 흰색이 아닌 다른 색일 때 동영상 파일을 어떻게 rendering 해야 하는지 궁금합니다. 

실전 모의고사 강의 python버전도 출시 예정일까요?

탈퇴하려고 하는데 못찾겠어요 ㅜㅜ

강의 내용과 상관없긴하지만 노이즈가 설명하는 말소리보다 커서 뭐라고 하는지 집중도 안되고, 거슬립니다. 혹시 이부분 개선 안될까요?

#include <iostream>   using namespace std;   class Stock { private: string name; int shares; float share_val; double total_val; void set_total() { total_val = shares * share_val; }   public: void acquire(string&, int, float); void buy(int, float); void sell(int, float); void updata(float); void show(); Stock(); ~Stock(); }; void Stock::acquire(string& co, int n, float pr) { name = co; shares = n; share_val = pr; set_total();  }   void Stock::buy(int n, float pr) { shares += n; share_val = pr; set_total(); }   void Stock::updata(float pr) { share_val = pr; set_total(); }   void Stock::show() { cout << "회사 명 : " << name << endl; cout << "주식 수 : " << shares << endl; cout << "주가 : " << share_val << endl; cout << "주식 총 가치 : " << total_val << endl; }   Stock::Stock() {   } Stock::~Stock() {   } int main() { Stock temp; temp.acquire("",100, 1000); temp.show(); temp.buy(10, 1200); temp.show(); temp.sell(5, 800); temp.show();   return 0; } 심각도 코드 설명 프로젝트 파일 줄 비표시 오류(Suppression) 상태 오류(활성) E0434 "std::string &" 형식(const 한정 형식 아님)의 참조를 "const char [1]" 형식의 값으로 초기화할 수 없습니다. 1 C:\Users\user\source\repos\1\1\main.cpp 63 디버깅이 않 되요ㅠㅠ    

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://docs.google.com/document/d/1j0jcJ9EoXMGzwAA2H0b9TOvRtpwlxI5Dtn3sRtuXQas/edit#heading=h.w2tomwsznga7)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://docs.google.com/document/d/1xCQKit-1V6l6ObeCe49St33RHPzLF_P_c3o7aSDTKs0/edit#heading=h.7dhnp46ven0v)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]   안녕하세요. 질문 있습니다.   store.put(member.getId(), member)에서 value로 member.getName()이 와야하지 않나요? 왜 member인지 모르겠습니다..ㅠ

안녕하세요 강의 잘 듣고 있습니다. 인터셉터 안에 this를 사용하고 싶으면 바인딩을 어떤 방식으로 하는 것이 좋은지 조언을 구하고 싶습니다. 감사합니다

[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]입문, 핵심원리 강의 다 들었을 때 예를들어 회원시스템, 주문 코드 등등, 제가 강의에서 본 그 코드들을 몇개는 만들 수 있겠지만 처음부터 끝까지는 못만들 것 같아요. 이 상황에서 실습느낌으로 제가 코드를 한번 전체적으로 강의에 쓰인 코드처럼 짜보는 게 맞는건지 질문드립니다. 이 이후 강의를 더 듣고 그 다음 제가 구현해봐야 하는건지 아니면 지금 한번 느낌잡고 가는게 맞는건지 모르겠어서요. 만약 저 혼자 강의 실습코드들 처럼 만든다고 가정했을 때, 강의에 나온 할인, 회원조회 이런 기능들을 만들어보는게 맞겠죠?    

변수를 생성할때, String result; 와 String result = ""; 의 차이점이 뭔가요?

안녕하세요 Spring 기본편들은 후 JPA와 함께 혼자 간단한 토이 프로젝트 진행하다가 해결이 안되서 질문 남깁니다!   간단히 jpaUserRepositroy 빈이 생성됬는지부터 확인해보고 싶은데 어떤 것이 문젠지 모르겠습니다ㅜㅜ     "C:\Program Files\OpenJDK\jdk-11.0.1\bin\java.exe" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1.1\lib\idea_rt.jar=1641:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 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\82103\.gradle\caches\modules-2\files-2.1\org.ow2.asm\asm\5.0.4\da08b8cce7bbf903602a25a3a163ae252435795\asm-5.0.4.jar;C:\Users\82103\.gradle\caches\modules-2\files-2.1\com.h2database\h2\1.4.200\f7533fe7cb8e99c87a43d325a77b4b678ad9031a\h2-1.4.200.jar;C:\Users\82103\.gradle\caches\modules-2\files-2.1\org.junit.jupiter\junit-jupiter-engine\5.6.2\c0833bd6de29dd77f8d071025b97b8b434308cd3\junit-jupiter-engine-5.6.2.jar;C:\Users\82103\.gradle\caches\modules-2\files-2.1\org.junit.platform\junit-platform-engine\1.6.2\1752cad2579e20c2b224602fe846fc660fb35805\junit-platform-engine-1.6.2.jar;C:\Users\82103\.gradle\caches\modules-2\files-2.1\com.sun.activation\jakarta.activation\1.2.2\74548703f9851017ce2f556066659438019e7eb5\jakarta.activation-1.2.2.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit5 com.example.user.repository.JpaUserRepositoryTest 18:21:39.100 [main] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@1da2cb77 18:21:39.122 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor' 18:21:39.285 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor' 18:21:39.288 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory' 18:21:39.290 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor' 18:21:39.292 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor' 18:21:39.298 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalPersistenceAnnotationProcessor' 18:21:39.306 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'appConfig'   org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.example.user.repository.UserRepository' available   at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:352) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:343) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1127) at com.example.user.repository.JpaUserRepositoryTest.빈등록확인(JpaUserRepositoryTest.java:20) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:686) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:212) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:208) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:137) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:71) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.base/java.util.ArrayList.forEach(ArrayList.java:1540) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at java.base/java.util.ArrayList.forEach(ArrayList.java:1540) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248) at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211) at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132) at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:221) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)     Process finished with exit code -1   package com.example.user.entity;import javax.persistence.Embedded;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class User { @Id @GeneratedValue private Long id; private String name; private String email; @Embedded private Address address; public User(){ } public User(Long id, String name, String email, Address address) { this.id = id; this.name = name; this.email = email; this.address = address; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public Address getAddress() { return address; } public void setAddress(Address address) { this.address = address; } @Override public String toString() { return "User{" + "id=" + id + ", name='" + name + '\'' + ", email='" + email + '\'' + ", address=" + address + '}'; }} package com.example;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;@Configurationpublic class AppConfig {} package com.example.user.repository;import com.example.AppConfig;import com.example.Application;import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.context.ApplicationContext;import org.springframework.context.annotation.AnnotationConfigApplicationContext;public class JpaUserRepository {// @Autowired UserRepository userRepository; @Test public void 빈등록확인(){ ApplicationContext ac=new AnnotationConfigApplicationContext(AppConfig.class); UserRepository userRepository=ac.getBean(UserRepository.class); System.out.println(userRepository); }} package com.example.user.repository;import com.example.user.entity.User;import org.springframework.stereotype.Component;import javax.persistence.EntityManager;import javax.persistence.PersistenceContext;import java.util.Optional;@Componentpublic class JpaUserRepository implements UserRepository { @PersistenceContext EntityManager em; @Override public void save(User user) { em.persist(user);// return user.getId(); } @Override public User findOne(Long id) { return em.find(User.class,id); } @Override public Optional<User> findByEmail(String email) { return Optional.empty(); }}

항상 고생이 많으십니다.     메인페이지 새로고침시 위와 같은 에러가 나왔는데 어디가 문제인지 못찾고 있습니다.   User에 관련된 부분이 문제인것 같은데 리덕스에선 보시다시피 User 관련이 Null로 나오고 있습니다. 어디쪽을 봐야할까요     워크벤치에서도 UserId 부분이 Null로 표시 돼 있습니다. 터미널에서 서버와 프론트 모두 에러로그 표시는 없습니다.  

고유한 이메일 문제풀이 1번에서는  domaing은 @이후로 substring 하고, local은 앞에서 부터 for 문을 돌면서 +와 @를 만나면 break 하는 방식으로 풀었는데다음 강의 보니까 subString 방식은 이미 풀어져있고, 설명은 없네요