map -package:containers -package:insert-ordered-containers -package:dlist -package:blaze-html -package:Cabal-syntax -package:dense-linear-algebra -package:monoidal-containers -package:imports is:exact -package:incipit-base -package:base-prelude -package:charset package:basement
Map all element a from a block to a new block of b
Map all elements in a list