Before we finish up with our core.async portion of the book, it would be unwise of me not to mention what is coming up in Clojure 1.7 as well as how this affects core.async.

At the time of this writing, Clojure's latest release is 1.7.0-alpha5—and even though it is an alpha release, a lot of people—myself included—are already using it in production.

As such, a final version could be just around the corner and perhaps by the time you read this, 1.7 final will be out already.

One of the big changes in this upcoming release is the introduction of transducers. We will not cover the nuts and bolts of it here but rather focus on what it means at a high-level with examples using both Clojure sequences and core.async channels.

If you would like to know more I recommend Carin Meier's Green Eggs and Transducers blog post (http://gigasquidsoftware.com/blog/2014/09/06/green-eggs-and-transducers/). It's a great place to start.

Additionally, the official Clojure documentation site on the subject...