In C++, how do I declare a class? Should I put a ; after declaring it? And when creating a closure, what exactly &, = mean? When should I use std::cout and when not, and why? What exactly is the syntax for inheritance?

Ok, you can learn all that while using the language, but a card deck allows me to review it 5 minutes before sleeping.

Though I love Swift, the transition from ObjC has left some warts in parts of Foundation / UIKit, and regular expressions are a great example of that.

In Python, I can use regex from memory. In Swift, I have to look up the docs every time. It would be nice to have it memorized.