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