map -package:containers -package:insert-ordered-containers -package:blaze-html -package:conduit -package:basement -package:invertible -package:case-insensitive -package:monoidal-containers -is:exact -package:dense-linear-algebra -package:filepath -package:os-string -package:dlist -package:vector -package:unordered-containers -package:hedgehog 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