map -package:containers -package:base-prelude -package:basement -package:aeson -package:psqueues -package:base-compat-batteries -package:dlist -package:bytestring -package:conduit -package:incipit-base -package:monoidal-containers -package:integration -package:text -package:foldl -package:imports -is:exact -package:vector -package:os-string -is:exact -package:pipes 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