map -package:containers -package:aeson -package:insert-ordered-containers -package:base-compat-batteries -package:blaze-html -package:dlist -package:hedgehog -package:base-prelude -package:os-string -package:dense-linear-algebra -package:monoidal-containers package:basement is:exact
Map all element a from a block to a new block of b
Map all elements in a list