I enjoyed that post so much, I took a couple of minutes and made an Elixir version https://github.com/bryanjos/arithmetic https://github.com/bryanjos/arithmetic

I enjoyed that post so much, I took a couple of minutes and made an Elixir version https://github.com/bryanjos/arithmetic https://github.com/bryanjos/arithmetic. The book is pretty expensive, but I want to get a copy.