map -package:containers -package:insert-ordered-containers -package:dense-linear-algebra -package:basement -package:psqueues -package:conduit -package:dlist -is:exact -package:Cabal-syntax -package:regex-tdfa -package:unordered-containers -package:ghc -package:vector -package:bloodhound 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