map -package:containers -package:charset -package:dense-linear-algebra -package:blaze-html -package:base-prelude -package:basement -package:base -package:filepath -package:case-insensitive -package:pipes -package:Cabal-syntax -package:monoidal-containers -package:os-string -package:base-compat-batteries package:hedgehog is:exact
Generates a map using a
Range to determine the length.
This may fail to generate anything if the keys produced by the
generator do not account for a large enough number of unique
items to satify the required map size.