lib/rufus/tokyo/cabinet/abstract.rb
def delete_keys_with_prefix (prefix)

      call_misc(
        'outlist', lib.abs_fwmkeys(@db, prefix, Rufus::Tokyo.blen(prefix), -1))
          # -1 for no limits

      nil
    end
def delete_keys_with_prefix (prefix)

      call_misc(
        'outlist', lib.abs_fwmkeys(@db, prefix, Rufus::Tokyo.blen(prefix), -1))
          # -1 for no limits

      nil
    end
Deletes all the entries whose keys begin with the given prefix