Zulip Chat Archive

Stream: lean4

Topic: Functor Array


David Thrane Christiansen (Oct 15 2022 at 13:53):

I'm curious as to why there's no instance like this by default:

instance : Functor Array where
  map := Array.map

As far as I can see, it satisfies the functor laws, preserves linearity as one would like, and is generally convenient.


Last updated: May 02 2025 at 03:31 UTC