map -package:containers -package:ghc -package:insert-ordered-containers -package:blaze-html -package:case-insensitive -package:dlist -package:amazonka-core -package:incipit-base -package:monoidal-containers -package:integration -package:base-prelude package:basement is:exact
Map all element a from a block to a new block of b
Map all elements in a list