Silvana Ramírez

What we won’t do is say that functional programming is better than object-oriented programming, or that you must choose one over the other. OOP vs FP is a false dichotomy. Every real Javascript application I’ve seen in recent years mixes FP and OOP extensively.

The latter causes a large variety of well-known problems in object o…duce composite objects, but not all composite objects are produced by classes or class inheritance. “Favor object composition over class inheritance” means that you should form composite objects from small component parts, rather than inheriting all properties from an ancestor in a class hierarchy. The latter causes a large variety of well-known problems in object oriented design:

…can’t avoid composition just because you’re not aware of it. You still do it — but you do it badly. You write code with more bugs, and make it harder for other developers to understand. This is a big problem. The effects are very costly. We spend more time maintaining software than we do creating it from scratch, and our bugs impact billions of people all over the world.