3 posts.
A practical guide to Python function arguments — defaults, keyword arguments, *args, **kwargs, positional-only and keyword-only parameters, and the mutable default gotcha.
A practical guide to Python functions — defining with def, returning values, arguments and parameters, docstrings, and the habits that make functions worth reusing.
A practical, beginner-friendly guide to typing functions in TypeScript — parameter and return types, optional and default parameters, rest parameters, callbacks, and overloads.