map is:exact -package:text -package:base -package:charset -package:ghc -package:basement -package:containers -package:os-string -package:invertible -package:monoidal-containers -package:conduit -package:incipit-base -package:pipes package:unordered-containers
Transform this map by applying a function to every value.
Transform this set by applying a function to every value.
The resulting set may be smaller than the source.
>>> HashSet.map show (HashSet.fromList [1,2,3])
HashSet.fromList ["1","2","3"]