map -package:containers -package:bytestring -package:ghc -package:base-prelude -package:monoidal-containers -package:basement -package:dlist -package:psqueues -package:filepath -package:text -package:base 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"]