You can do FP in any programming languages, some are just focusing more on it than others. With OCaml, you will have what might be the best type system of the world. With Haskell, purity everywhere. With clojure, Lisp which is awesome. So Ruby should just fit, here are some resources to make you understand what is FP :

• What’s Functional Programming All About?
• Why Isn’t Functional Programming the Norm?

Another interesting resource is how John Carmack talk about potential use of purity (with haskell in its case) in event passing to entities in video game at the Quake Con 2013 (~17min 30). It made me better understand how pure and impure code should coexist.

They sadly don’t seem to push much effort into Linux, which is a shame, because it ties you to Windows. I don’t say that it is impossible, but much harder than on steam. The most upvoted wish is the port of GOG galaxy on Linux after all

😲 Please share how 🙏

I like the typing system of OCaml but I also like the fact that typing systems are optional in the lisps (Typed Racket, Typed Clojure, the CLOS…)