boolean vs not not

[tjg]

Happy to read the book!

On p.114 (published 2012-10-17), you use the example:

(comp not not predicate)

As I understand, boolean does the job:

(comp boolean predicate)

It might be worth changing the example or at least noting this, lest it give the impression that inelegant Clojure code is needed here.

[marick]

Yes, I managed to not know about boolean for way too long. I'll fix this in the final version.