map is:exact -package:text -package:Cabal-syntax -package:conduit -package:dense-linear-algebra -package:incipit-base -package:foldl -package:filepath -package:case-insensitive -package:aeson -package:base -package:basement -package:insert-ordered-containers package:monoidal-containers
O(n) Transform this map by applying a function to every value.