map -package:vector -package:basement -package:conduit -package:case-insensitive -package:bytestring -package:aeson -package:hedgehog -package:containers -package:blaze-html -package:psqueues -is:exact -package:pipes -package:imports -package:dlist -package:unordered-containers 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