:: (a -> b) -> [a] -> [b] is:exact -package:stm-hamt -package:comonad -package:generic-deriving -package:ghc -package:base-prelude -package:base-compat -package:basement -package:adjunctions -package:imports -package:Cabal-syntax -package:semigroupoids package:vector
O(n) Map a function over a vector.