map is:exact -package:lens -package:bytestring -package:Cabal-syntax -package:base-compat -package:base-prelude -package:dense-linear-algebra -package:base-compat-batteries -package:aeson -package:dlist -package:foldl -package:blaze-html package:monoidal-containers
O(n) Transform this map by applying a function to every value.