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map -package:containers -package:basement -package:conduit -is:exact -package:aeson -package:invertible -package:base-compat -package:charset -package:pipes -package:ghc package:foldl is:exact
map
:: Ord a => Fold (a, b) (Map a b)
foldl
Control.Foldl
Fold pairs into a map.
Packages