map -package:containers -package:bytestring -package:dlist -package:base-prelude -package:base-compat-batteries -package:foldl -package:dense-linear-algebra -package:case-insensitive is:exact -package:Cabal-syntax -package:os-string -package:base package:basement
Map all element a from a block to a new block of b
Map all elements in a list