It does not make sense if you think you have to learn every single function in a language's standard library. And if you think you have to, you are thinking wro

It does not make sense if you think you have to learn every single function in a language's standard library. And if you think you have to, you are thinking wrong of a language like C++. This sheets are just a summary of what a language is capable of, you don't have to memorize every library function just look up what you need.