map -package:containers -package:bytestring -package:Cabal-syntax -package:dense-linear-algebra -package:ghc -package:blaze-html -package:incipit-base -package:dlist -package:foldl -package:integration -package:conduit is:exact -package:case-insensitive package:basement
Map all element a from a block to a new block of b
Map all elements in a list