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Today I Learned
  • Today I Learned
  • algorithm
    • Binary Search (์ด์ง„ ํƒ์ƒ‰)
    • Brute Force Search (์™„์ „ํƒ์ƒ‰)
    • DFS์™€ BFS
    • Dijkstra Algorithm (๋‹ค์ต์ŠคํŠธ๋ผ ์•Œ๊ณ ๋ฆฌ์ฆ˜)
    • Dynamic Programming (๋™์  ๊ณ„ํš๋ฒ•)
    • Floyd-Warshall Algorithm (ํ”Œ๋กœ์ด๋“œ-์›Œ์…œ ์•Œ๊ณ ๋ฆฌ์ฆ˜)
    • Greedy
    • ์ •๋ ฌ ์•Œ๊ณ ๋ฆฌ์ฆ˜(Sorting Algorithm)
  • data-structure
    • Array, List, LinkedList
    • Graph vs Tree
    • Hash, Map, HashMap
    • Heap
    • Stack, Queue (์Šคํƒ, ํ)
  • database
    • Database Lock
    • Execution Plan
    • Index
    • Join Algorithm
    • MySQL ์‚ฌ์šฉ์ž ๊ถŒํ•œ๋ถ€์—ฌ
    • Normalization (์ •๊ทœํ™”)
    • Row-Oriented vs Column-Oriented
    • Transaction
    • ํŠธ๋žœ์žญ์…˜ ๊ฒฉ๋ฆฌ ์ˆ˜์ค€ (Transaction Isolation Level)
    • VARCHAR์˜ ๊ธธ์ด์ œํ•œ
  • ๋””์ž์ธ ํŒจํ„ด์˜ ์ข…๋ฅ˜
    • Abstract Factory Pattern
    • Adapter Pattern
    • Bridge Pattern
    • Builder Pattern
    • Chain of Responsibility Pattern
    • Class Diagram
    • Command Pattern
    • Composite Pattern
    • Decorator Pattern
    • Facade Pattern
    • Factory Method Pattern (ํŒฉํ† ๋ฆฌ ๋ฉ”์†Œ๋“œ ํŒจํ„ด)
    • Flyweight Pattern
    • Iterator Pattern
    • Mediator Pattern
    • Memento Pattern
    • Observer Pattern
    • Prototype Pattern
    • Proxy Pattern
    • SOLID
    • Singleton Pattern
    • State Pattern
    • Strategy Pattern
    • Template Method
    • UML
    • ๊ฐ์ฒด์ง€ํ–ฅ_ํŒจ๋Ÿฌ๋‹ค์ž„
  • docker
    • Docker
    • Docker Network
  • etc
    • Block vs Non-block, Sync vs Async
  • git
    • Git Merge vs Git Rebase
    • ์ž์ฃผ ์‚ฌ์šฉํ•˜๋Š” Git ๋ช…๋ น์–ด ๋ชจ์Œ
  • java
    • Annotation
    • Exception Handling (์˜ˆ์™ธ ์ฒ˜๋ฆฌ)
    • Generic
    • JVM
    • Java ์ฝ”๋“œ์˜ ์‹คํ–‰ ๊ณผ์ •
    • Lambda Expression
    • Object Class
    • Optional
    • Primitive Type & Reference Type
    • Reflection
    • Serialize And Deserialize
    • Stream
    • String, StringBuilder, StringBuffer
    • Tiles
    • Type Casting
    • ์™œ Java์˜ ์ •๋ ฌ ํ•จ์ˆ˜ sort()๋Š” static ๋ฉ”์†Œ๋“œ์ผ๊นŒ?
    • ์ถ”์ƒํด๋ž˜์Šค์™€ ์ธํ„ฐํŽ˜์ด์Šค์˜ ์ฐจ์ด
    • effective-java
      • Item 1. ์ƒ์„ฑ์ž ๋Œ€์‹  ์ •์  ํŒฉํ† ๋ฆฌ ๋ฉ”์„œ๋“œ๋ฅผ ๊ณ ๋ คํ•˜๋ผ
      • Item 10. equals๋Š” ์ผ๋ฐ˜ ๊ทœ์•ฝ์„ ์ง€์ผœ ์žฌ์ •์˜(์˜ค๋ฒ„๋ผ์ด๋”ฉ)ํ•˜๋ผ
      • Item 11. equals๋ฅผ ์˜ค๋ฒ„๋ผ์ด๋”ฉํ•  ๊ฑฐ๋ฉด hashCode๋„ ์˜ค๋ฒ„๋ผ์ด๋”ฉํ•˜๋ผ
      • Item 12. toString์€ ํ•ญ์ƒ ์˜ค๋ฒ„๋ผ์ด๋”ฉํ•˜๋ผ
      • Item 13. clone ์˜ค๋ฒ„๋ผ์ด๋”ฉ์€ ์ฃผ์˜ํ•ด์„œ ์ง„ํ–‰ํ•˜๋ผ
      • Item 14. Comparable์„ ๊ตฌํ˜„ํ• ์ง€ ๊ณ ๋ คํ•˜๋ผ
      • Item 15. ํด๋ž˜์Šค์™€ ๋ฉค๋ฒ„์˜ ์ ‘๊ทผ ๊ถŒํ•œ์„ ์ตœ์†Œํ™”ํ•˜๋ผ
      • Item 16. public ํด๋ž˜์Šค์—์„œ๋Š” public ํ•„๋“œ๊ฐ€ ์•„๋‹Œ ์ ‘๊ทผ์ž ๋ฉ”์„œ๋“œ๋ฅผ ์‚ฌ์šฉํ•˜๋ผ
      • Item 17. ๋ณ€๊ฒฝ ๊ฐ€๋Šฅ์„ฑ์„ ์ตœ์†Œํ™”ํ•˜๋ผ
      • Item 18. ์ƒ์† ๋Œ€์‹  ์ปดํฌ์ง€์…˜์„ ์‚ฌ์šฉํ•˜๋ผ
      • Item 19. ์ƒ์†์„ ๊ณ ๋ คํ•ด ์„ค๊ณ„ํ•˜๊ณ  ๋ฌธ์„œํ™”ํ•˜๋ผ. ๊ทธ๋ ‡์ง€ ์•Š์•˜๋‹ค๋ฉด ์ƒ์†์„ ๊ธˆ์ง€ํ•˜๋ผ
      • Item 2. ์ƒ์„ฑ์ž์— ๋งค๊ฐœ๋ณ€์ˆ˜๊ฐ€ ๋งŽ๋‹ค๋ฉด ๋นŒ๋”๋ฅผ ๊ณ ๋ คํ•˜๋ผ
      • Item 20. ์ถ”์ƒ ํด๋ž˜์Šค๋ณด๋‹ค๋Š” ์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ์šฐ์„ ํ•˜๋ผ
      • Item 21. ์ธํ„ฐํŽ˜์ด์Šค๋Š” ๊ตฌํ˜„ํ•˜๋Š” ์ชฝ์„ ์ƒ๊ฐํ•ด ์„ค๊ณ„
      • Item 22. ์ธํ„ฐํŽ˜์ด์Šค๋Š” ํƒ€์ž…์„ ์ •์˜ํ•˜๋Š” ์šฉ๋„๋กœ๋งŒ ์‚ฌ์šฉํ•˜๋ผ
      • ํƒœ๊ทธ ๋‹ฌ๋ฆฐ ํด๋ž˜์Šค๋ณด๋‹ค๋Š” ํด๋ž˜์Šค ๊ณ„์ธต๊ตฌ์กฐ๋ฅผ ํ™œ์šฉ
      • Item 24. ๋ฉค๋ฒ„ ํด๋ž˜์Šค๋Š” ๋˜๋„๋ก static์œผ๋กœ ๋งŒ๋“ค๋ผ
      • Top Level Class๋Š” ํ•œ ํŒŒ์ผ ๋‹น ํ•˜๋‚˜๋งŒ ์„ ์–ธํ•˜๋ผ
      • Item 26. ๋กœ์šฐ ํƒ€์ž…(raw type)์€ ์‚ฌ์šฉํ•˜์ง€ ๋ง๋ผ
      • Item 27. ๋น„๊ฒ€์‚ฌ ๊ฒฝ๊ณ ๋ฅผ ์ œ๊ฑฐํ•˜๋ผ
      • Item 28. ๋ฐฐ์—ด๋ณด๋‹ค๋Š” ๋ฆฌ์ŠคํŠธ๋ฅผ ์‚ฌ์šฉํ•˜๋ผ
      • Item 29. ์ด์™•์ด๋ฉด ์ œ๋„ค๋ฆญ ํƒ€์ž…์œผ๋กœ(ํด๋ž˜์Šค๋กœ) ๋งŒ๋“ค๋ผ
      • Item 3. private ์ƒ์„ฑ์ž๋‚˜ ์—ด๊ฑฐ ํƒ€์ž…์œผ๋กœ ์‹ฑ๊ธ€ํ„ด์ž„์„ ๋ณด์ฆํ•˜๋ผ
      • Item 4. ์ธ์Šคํ„ด์Šคํ™”๋ฅผ ๋ง‰์œผ๋ ค๊ฑฐ๋“  private ์ƒ์„ฑ์ž๋ฅผ ์‚ฌ์šฉํ•˜๋ผ
      • Item 5. ์ž์›์„ ์ง์ ‘ ๋ช…์‹œํ•˜์ง€ ๋ง๊ณ  ์˜์กด ๊ฐ์ฒด ์ฃผ์ž…์„ ์‚ฌ์šฉํ•˜๋ผ
      • Item 6. ๋ถˆํ•„์š”ํ•œ ๊ฐ์ฒด ์ƒ์„ฑ์„ ํ”ผํ•˜๋ผ
      • Item 7. ๋‹ค ์“ด ๊ฐ์ฒด ์ฐธ์กฐ๋ฅผ ํ•ด์ œํ•˜๋ผ
      • Item 8. finalizer์™€ cleaner์˜ ์‚ฌ์šฉ์„ ํ”ผํ•˜๋ผ
      • Item 9. try-finally๋ณด๋‹ค๋Š” try-with-resources๋ฅผ ์‚ฌ์šฉํ•˜๋ผ
  • linux
    • Linux์˜ Permission
  • network
    • OSI 7 Layer
    • Subnet
    • ๊ทธ๋ฆผ์œผ๋กœ_๋ฐฐ์šฐ๋Š”_http_&_network_basic
  • python
    • ํŒŒ์ด์ฌ์˜ ์žฌ๊ท€ ์ œํ•œ(Recursion Limit)
  • server
    • CI & CD
    • Cache
    • Cloud Service
    • REST API
    • ์ •์  ์„œ๋ฒ„(Web Server)์™€ ๋™์  ์„œ๋ฒ„(Web Application Server, WAS)
  • spring
    • Configuration
    • @RequestParam, @RequestBody, @ModelAttribute
    • AOP (Aspect Oriented Programming)
    • ์˜์กด์„ฑ ์ž๋™ ์ฃผ์ž…
    • Bean Scope (๋นˆ์˜ ์œ ํšจ ๋ฒ”์œ„)
    • [Error] Bean could not be injected because it is a JDK dynamic proxy
    • Component Scan
    • ๐Ÿฑโ€๐Ÿ‘ค Component vs Bean
    • ์—ฌ๋Ÿฌ ๊ฐœ์˜ @Configuration(์„ค์ • ํŒŒ์ผ)์„ ์‚ฌ์šฉํ•˜๋Š” ๋ฐฉ๋ฒ•
    • DI (Dependency Injection, ์˜์กด์„ฑ ์ฃผ์ž…)
    • Filter, Interceptor, (Spring) AOP
    • IoC Container
    • Nested Class์˜ Bean ๋“ฑ๋ก
    • Profile
    • Properties
    • Spring Bean์˜ ์ƒ๋ช…์ฃผ๊ธฐ(life-cycle)
    • Spring vs Spring Boot
    • Thymeleaf
    • jpa
      • Dirty Checking
      • JPA์˜ Fetch ์ „๋žต
      • JPA N+1 Problem
    • spring-boot
      • Spring Web Layer (์Šคํ”„๋ง ์›น ๊ณ„์ธต)
      • Spring Boot
    • spring-mvc
      • Argument Resolver
      • Filter
      • Interceptor
      • RestController
      • Validator
      • Exception Handling
      • Spring MVC
    • spring-security
      • Spring Security
  • testing
    • Test Double (ํ…Œ์ŠคํŠธ ๋”๋ธ”)
    • ํ™”์ดํŠธ๋ฐ•์Šค ํ…Œ์ŠคํŠธ, ๋ธ”๋ž™๋ฐ•์Šค ํ…Œ์ŠคํŠธ
  • web
    • Browser Caching
    • CORS
    • HTTP Header
    • HTTP์™€_HTTPS
    • ๐Ÿ›ก๏ธOAuth
    • PRG Pattern
    • Query Parameter, Path Variable
    • ๐ŸŸข๐ŸŸก๐Ÿ”ด Status Code (์ƒํƒœ ์ฝ”๋“œ)
    • WebSocket
    • application/octet-stream
    • Cookie-Session
    • JWT
    • multipart/form-data
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linux

Linux์˜ Permission
PreviousItem 9. try-finally๋ณด๋‹ค๋Š” try-with-resources๋ฅผ ์‚ฌ์šฉํ•˜๋ผNextLinux์˜ Permission

Last updated 2 years ago