It is always a good time to write a blog if your source code access permission expires and you wait for someone to approve your request. Since I couldn’t find a good example how to do this and spend some time this thing deserves its blog post. What I...

I am sure you heard about this interview question “a king wants to send a locked box to another king but he must use a pirate as a carrier, how can he make sure the pirate cannot open the box without breaking it". The correct solution is to use a public...