trivial

• 2018/10/23 My Notes for Makefile
• 2018/10/22 error messages
• 2018/07/19 Notes on Multithreading in C++
• 2018/07/17 Road to 100 reputation on stack overflow
• 2018/01/25 `apply` and `do.call`
• 2017/07/11 Time management