why bother with null and java 8 has optional

Write a program in efficient way as you write for kernel scheduler

linux is my kernel programming is my bus

If you are too lazy to cleanup your database after testing, your filesystem after testing or your memory based system consider moving to a different profession. This isn't a job for you.

The most important property of a program is whether it accomplishes the intention of its user.

The best programs are written so that computing machines can perform them quickly and so that human beings can understand them clearly. A programmer is ideally an essayist who works with traditional aesthetic and literary forms as well as mathematical concepts, to communicate the way that an algorithm works and to convince a reader that the results will be correct.