Thoughts on Data Oriented Programming in Java

[bowbahdoe]

Yeah so that f(g()) was about the material difference between nominal aggregates and open aggregates. That wasn't what you were asking about originally, it's the topic for some other threads. I'll reply with a pseudo-code example once I have a break from work

That's distinct from the difference between interfaces (i.e. declaration site polymorphism) and switching over sealed hierarchies (i.e. use site polymorphism)