I'll also leave these here, in case the conversation inevitably turns to pattern-matched function definition in Elixir. :)

https://github.com/clojure/core.match -- pattern matching as a library

https://github.com/killme2008/defun -- using core.match to implement Elixir/Erlang-like function definition

https://github.com/noprompt/meander -- advanced pattern matching, for some fun and flavor :)

What's also fun is that core.match is implemented using a paper from INRIA on how to efficiently convert patterns into decision trees:

https://github.com/clojure/core.match/wiki/Understanding-the...