Functors for dependency injection?

[dbuenzli]

@bobbypriambodo

And how quickly is “quickly” (i.e. is the actionable “avoid it at all cost” or “we can use it, but don’t go overboard”)?

This twenty years old ICFP presentation by Benjamin Pierce makes the case quite well that a fully functorized style does not scale in practice (slides 45-48) and gives you a key insight on when to actually use a functor (slide 27-b).