map -package:containers is:exact -package:blaze-html -package:base-compat -package:Cabal-syntax -package:dlist -package:ghc -package:foldl -package:base-compat-batteries -package:incipit-base -package:amazonka-core -package:dense-linear-algebra package:basement
Map all element a from a block to a new block of b
Map all elements in a list