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