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