map -package:containers -package:base-compat -package:foldl -package:amazonka-core -package:base-prelude -package:Cabal-syntax -package:dense-linear-algebra -package:case-insensitive -package:imports -package:blaze-html -package:bytestring package:basement is:exact
Map all element a from a block to a new block of b
Map all elements in a list