map -package:containers -package:base -package:insert-ordered-containers -package:basement -package:conduit -package:regex-tdfa -package:monoidal-containers is:exact -package:case-insensitive -package:aeson -package:incipit-base -package:text 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"]