Protocols (dynamic dispatch per object instance): https://elixir-lang.org/getting-started/protocols.html
Behaviors (not-exactly-dynamic dispatch per module, not per object instance): https://elixir-lang.org/getting-started/typespecs-and-behaviours.html
Just make a small project, open up iex -S mix when you cd into it and experiment by yourself. Elixir has a super-enabling REPL, use it to your full advantage. It’s a very freeing feeling and I bet you’ll miss it in the languages that don’t have it afterwards. 
