map -package:containers -package:case-insensitive -package:aeson -package:bytestring -package:blaze-html -package:monoidal-containers -package:basement -package:insert-ordered-containers -package:foldl -package:hedgehog -package:text -package:psqueues -package:vector package:vector-stream
Map a monadic function over a
Stream
Execute a monadic action for each element of the
Stream
Apply monadic function to each element and drop all Nothings