nodejs-doc-api

• node doc api for me
• https://nodejs.org/ko/docs/
• http://nodejs.sideeffect.kr/docs/ 한글버전(10.x 이전꺼부터 있음)

Buffer

• https://namik.tistory.com/115

File System

• https://kamsi76.tistory.com/entry/NodeJS-File-System
• https://code-daniel.tistory.com/6

fs.open(file, flags[, mode], callback)

fs.read(fd, buffer, offset, length, position, callback)

• fd : 파일디스크립터
• Read data from the file specified by fd.
• buffer : 읽은 내용을 담을 버퍼( let buf = Buffer.alloc(10) )
• buffer is the buffer that the data will be written to.
• offset : 버퍼 오프셋(덮어쓸 버퍼 시작 위치)
• offset is the offset in the buffer to start writing at.
• length : 읽을 사이즈
• length is an integer specifying the number of bytes to read.
• position : 어디서부터 읽을지 정하는 포지션(위치값) 4로 지정할 경우 4byte 부터 읽는다(0부터 시작함.. 주의)
• position is an argument specifying where to begin reading from in the file. If position is null, data will be read from the current file + position, and the file position will be updated. If position is an integer, the file position will remain unchanged.

fs.close(fd, callback)

fs.stats(fd, callback)