Elixir in Action was written in 2015, and since then a lot is changed, so if I am using this book today with Elixir 1.5.2, what should I keep in mind.

Thanks everyone for responding. Just to confirm, yes the biggest deprecations I’m currently aware of are HashSet and childspecs. I’ve already started working on the updated version, which I expect to finish by mid March 2018. EDIT: one more change I forgot to mention is the addition of Registry , wh…