Lol, yes, yes you can indeed do impure in Elixir. 
I like to give myself little challenges like this, then try to see how many ways I can come up with to both code-golf it and break the language. ^.^
OvermindDL1
Qqwy
TypeCheck Core Team
The weird thing about anonymous functions, is that each definition creates a new anonymous function object. But if you assign an anonymous function to a variable, or compile a module that contains it in one of its functions, then this will only create one anonymous function object, and so it will be equal to itself.
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GustavoCaso
It would be great to have a place with language specific challenges, so every one can collaborate.
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OvermindDL1
True, just recently I added ocaml and rust to an Elixir Ports benchmark on a github repo recently. I like the test to see how things go. ^.^
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