[PHP] SQL Escape & Bypass
[C] dup2 + pipe
[C] File IO : open, fopen, setbuf / fd VS fp
[C] File IO : mmap - memcpy family
[python] File IO open 함수 및 내장함수
[python] pyplot.matplotlib
[C] 타입 Types / Type Casting / 가변 인자
[C/C++] define, inline, const, enum, enum class
[python] asyncio
[python] ( coroutine / Task )와 비동기 모듈
[python] threading, multiprocessing, GIL, concurrent.futures.ThreadPoolExecutor
[C] the end of the address space check