map -package:containers is:exact -package:aeson -package:case-insensitive -package:base-compat -package:base-prelude -package:amazonka-core -package:dense-linear-algebra -package:insert-ordered-containers -package:incipit-base -package:dlist -package:ghc package:basement
Map all element a from a block to a new block of b
Map all elements in a list