Joinc proposes educational computer-engineering contents. Especially, the contents focus on recently
popular and meaningful topics, technically helpful for those who already work or to-be developers in the
computer industry and theoretical or typical topics covered in undergraduate courses.
디렉토리 관련 함수들
데이터베이스에서의 디렉토리 구현
디렉토리 갯수만큼 필드를 만들기