map -package:containers -package:Cabal-syntax -package:base -package:incipit-base -package:base-compat -package:dense-linear-algebra is:exact -package:base-compat-batteries -package:base-prelude -package:ghc -package:insert-ordered-containers -package:conduit package:basement
Map all element a from a block to a new block of b
Map all elements in a list