map -package:vector -package:conduit -package:containers -package:base-prelude -package:blaze-html -package:insert-ordered-containers -package:basement -package:imports -package:invertible -package:monoidal-containers -package:regex-tdfa -package:dense-linear-algebra -package:dlist -package:Cabal-syntax -package:incipit-base -package:unordered-containers 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