안드로이드 튜토리얼 잘 설명
[Android] MVVM + AAC + Coroutine + Retrofit + Github API 예제

다른 설명
[Android] Architecture 정리 – AAC ViewModel, LiveData, Coroutine

안드로이드 Color
Material Theming with MDC: Color

Kotlin JVM Target Error
[Android][Kotlin] JVM 1.8 Target Error

Java 8 컴파일 문제

> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
   > Failed to transform retrofit-2.9.0.jar (com.squareup.retrofit2:retrofit:2.9.0) to match attributes {artifactType=android-dex, dexing-enable-desugaring=false, dexing-incremental-desugaring-v2=false, dexing-is-debuggable=true, dexing-min-sdk=20, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Execution failed for DexingNoClasspathTransform: /Users/derek/.gradle/caches/transforms-2/files-2.1/dda555eae69a5ef1d912ba1b49de4fa6/jetified-retrofit-2.9.0.jar.
         > Error while dexing.
           The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
           android {
               compileOptions {
                   sourceCompatibility 1.8
                   targetCompatibility 1.8
           See for details. Alternatively, increase the minSdkVersion to 26 or above.

Use Java 8 language features and APIs  |  Android Developers


글자 수 세기
[Javascript] 글자수 체크, 문자열 길이 구하기(한글 포함)


파일 업로드시 413 에러 발생
File upload limit in Kubernetes & Nginx


[PostgreSQL] 테이블 Range Partition 정리 공식 문서