map -package:vector -package:conduit -package:containers -package:base-prelude -package:basement -package:dense-linear-algebra -package:monoidal-containers -package:dlist -package:imports -package:ghc -package:aeson -package:charset -package:insert-ordered-containers -package:incipit-base -package:bytestring -package:text package:vector-stream

Map a function over a 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