I recently started working primarily in a statically-typed functional programming language (OCaml). While learning, I spent a lot of time trying to fit OCaml into a Ruby-shaped box. While there are plenty of things that I miss about Ruby day-to-day, there are also a lot of good lessons to take away! No, I’m not talking about static typing, or some rant on how nil is an anti-pattern. This talk instead will dig into concepts from around the functional world and how they can be modeled in Ruby for cleaner, more future-proof code.