1. 2

There are two other parts to this series (http://smallcultfollowing.com/babysteps/blog/2016/02/25/parallel-iterators-part-2-producers/ and http://smallcultfollowing.com/babysteps/blog/2016/11/14/parallel-iterators-part-3-consumers/) but I thought I would post the first one so people could start there.

  1.