2021-08-24-TIL

2021-08-24-TIL

MySQL

여러개의 컬럼을 유니크하게 관리

• https://myhappyman.tistory.com/148

MUL key

• https://torbjorn.tistory.com/557

Java

문자열 붙이기

• https://rullurangrang.tistory.com/5

정규표현식

• https://medium.com/@limgyumin/%EC%BD%94%ED%8B%80%EB%A6%B0-%EC%97%90%EC%84%9C-%EC%A0%95%EA%B7%9C-%ED%91%9C%ED%98%84%EC%8B%9D-%EC%82%AC%EC%9A%A9%ED%95%98%EA%B8%B0-2c655ba35c36
• https://sang12.co.kr/91/JAVA-%EC%A0%95%EA%B7%9C%EC%8B%9D-%ED%8A%B9%EC%A0%95-%EB%AC%B8%EC%9E%90%EC%97%B4-%EC%B9%98%ED%99%98%ED%95%98%EA%B8%B0
• https://offbyone.tistory.com/399
• https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html
• https://regexr.com/
• http://egloos.zum.com/sweeper/v/3064464
• https://stackoverflow.com/questions/1379191/why-does-this-java-regex-cause-illegal-escape-character-errors
• https://offbyone.tistory.com/400

파일이름에 사용할 수 없는 문자

• https://zetawiki.com/wiki/%ED%8C%8C%EC%9D%BC_%EC%9D%B4%EB%A6%84%EC%97%90%EB%8A%94%EB%8B%A4%EC%9D%8C%EB%AC%B8%EC%9E%90%EB%A5%BC_%EC%82%AC%EC%9A%A9%ED%95%A0%EC%88%98%EC%97%86%EC%8A%B5%EB%8B%88%EB%8B%A4

Kotlin

isEmpty vs isBlank

• https://holika.tistory.com/entry/%EB%82%B4-%EB%A7%98%EB%8C%80%EB%A1%9C-%EC%A0%95%EB%A6%AC%ED%95%9C-Kotlin-isEmpty%EC%99%80-isBlank%EC%9D%98-%EC%B0%A8%EC%9D%B4%EC%A0%90