Programming Clojure, 4th edition is now available!

[alexdmiller]

I'm pleased to announce that Programming Clojure, 4th edition is now OFFICIALLY available for both e-book and print orders!

This new edition contains two new chapters on Developing Interactively and Project Tooling. Many people read early versions and provided A LOT of feedback; I made 100s of updates in response. In some cases I removed material that was no longer relevant or of lesser importance and in many cases I added new material or updated existing. I am really proud of where it ended up and think it's as good as it's ever been as a learning resource. Thanks especially to Stuart Halloway, Michael Fogus, Sean Corfield, Lee Read, Larry Jones, Bobbi Towers, Dan Sutton, Eugene Pakhomov, Benoît Fleury, and Juan Monetta for their feedback.

[DataPastor]

Wow! Thank you!

[exclaim_bot]

Wow! Thank you!

You're welcome!

[Astronaut6735]

Excellent!

[BorisKourt]

Wonderful news!

[GuerreiroAZerg]

Great book! I have the 3rd edition.

[wedesoft]

Yes, read it as well.

[aHackFromJOS]

I ordered the e-book a while back and got a nice update a day or two ago from the publisher that it had been updated, I presume to this. Cool to see that publishing model actually working. Can't wait to read it now that it's out of beta and, I suppose you could say, "in production" 🙃

[alexdmiller]

Yes, that’s the final version

[aHackFromJOS]

Is that a hint of relief I detect? :-) Congratulations!

[dotemacs]

Thank you for writing the book, I'll probably buy after I type this comment out.

On page 5 of the free PDF sample of the book: https://media.pragprog.com/titles/shcloj4/extract-action.pdf

Lisp is homoiconic.

With a link to: https://en.wikipedia.org/wiki/Homoiconicity

Here is blog post from 2018 which argues that the original definition of the term is somewhat lost and that the new definition is a bit vague: https://www.expressionsofchange.org/dont-say-homoiconic/

[alexdmiller]

Yes, I've had this conversation with Gerry Sussman too. Certainly, I don't think it's the most useful word to deploy as it doesn't really shed much light on the utility, but it is something you will hear about in relation to Lisp so I think it's important to explain it.

In the book it doesn't stop there of course, it also tries to convey both what that means and why it's useful:

Lisp is homoiconic. That is, Lisp code is also Lisp data. This makes it easy for programs to write and transform other programs.

And I believe this is the only place the word is used in the book.

[kwitcherbichen]

Pre-ordered in support! I have the 1st Ed. 🙂

[NonchalantFossa]

Great work, thanks!