When to use 'raise NotImplementedError'??

Is it to remind yourself and your team to implement the class correctly? I don't fully get the use of an abstract cl...

Semicolon after class declaration braces?

In C++ classes, why the semi-colon after the closing brace? I regularly forget it and get compiler errors, and hence...

Why do we assign a parent reference to the child object in Java??

I am asking a quite simple question, but I am bit confused in this. Suppose I have a class Parent: public class Pa...