map is:exact -package:aeson -package:containers -package:conduit -package:basement -package:dlist -package:charset -package:os-string -package:regex-tdfa -package:base-compat-batteries -package:insert-ordered-containers -package:bytestring 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"]