map -package:containers -package:base-prelude -package:basement -package:aeson -package:bytestring -package:monoidal-containers -package:os-string -package:regex-tdfa -package:filepath -package:insert-ordered-containers -package:base-compat-batteries package:unordered-containers is:exact
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"]