Brian,

Thanks! I bought and started reading your book. Seems excellent so far, and 
wanted to say that I particularly appreciate your stated willingness to help 
those of us with no experience in functional programming. 

Nando

On Dec 11, 2012, at 20:14, Brian Marick <mar...@exampler.com> wrote:

> 
> On Dec 11, 2012, at 1:04 PM, Brian Marick <mar...@exampler.com> wrote:
>> If you want to "edit" trees, using zippers is often much much easier than 
>> collection functions. I find the code easier to understand, too.
> 
> 
> I almost forgot to make a shameless plug for /Functional Programming for the 
> Object-Oriented Programmer/ <https://leanpub.com/fp-oo> I have a chapter 
> about zippers, with lots of exercises. (I also have a set of exercises in 
> which you implement zippers. It's a nifty data structure.)
> 
> What the heck: anyone who sends me mail this week can have $5 off.
> 
> --------
> Occasional consulting on programming technique
> Contract programming in Ruby and Clojure
> Latest book: /Functional Programming for the Object-Oriented Programmer/
> https://leanpub.com/fp-oo
> 
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