Programming is not an easy job, and requires a lot of concentration and expert reference. You might get struck anytime, anywhere in the code, where you can’t work out the things, but need to finish the code as soon as possible, for your boss sitting hot over your head. At that moment of time, you wish, that something existed that could give you a quick help, or a quick reference, solving your problem in moments, and you get the things to work, as they are supposed to be! The good news, there exists a tool like this. Not actually a tool, we call them Cheat Sheets.