Clojurians Log v2

I would put a runtime guard in the body of the function.

Return nil when wrong input

Pretty sure this is how I handled this in the past

You can replace your fspec with fn? or ifn?

yes, I can but then I don’t check that the signature/shape matches. The real signature is something like this:

(s/fspec :args (s/cat :state any?) :res (s/cat :state any :result any?))

This would be easy with static typing 🙂

Spec is not a type system.

I know, it’s much more than a type system! This is the first thing I did find that would be easier with a static type system. That’s why I mentioned it.