As far as I as an Erlang developer can say, I think there's a misunderstanding about arity in Elixir (and probably even more misunderstandings on everything els

As far as I as an Erlang developer can say, I think there's a misunderstanding about arity in Elixir (and probably even more misunderstandings on everything else that's borrowed from Erlang). There is no "Pattern matching on arity feature". Normal functions are defined by a name and arity, `foo/1` and `foo/2` are two different functions and not two clauses of the same `foo` function. Erlang makes this clear when it forces you to export both instead of just exporting `foo`, maybe Elixir just tries to hide this limitation. Funs/lambdas are limited by this too, as another comment already showed, funs are sometimes (often?) compiled to normal functions.