Elixir

[AstonJ]

This is a good video by Prag Dave, but I don’t recommend watching it until after you’ve at least read through the basics of Elixir - the first time I watched it it actually put me off Elixir as I was like omgwtf!

LoneStarRuby Conf 2013 - Elixir: Power of Erlang, Joy of Ruby by Dave Thomas

Also, arity in Elixir sounds really neat:

Note: Functions in Elixir are identified by name and by number of arguments (i.e. arity). Therefore, is_boolean/1 identifies a function named is_boolean that takes 1 argument. is_boolean/2 identifies a different (nonexistent) function with the same name but different arity.