[Haskell-cafe] Re: Tree Guidance

[Thomas Schilling]

On 27 jun 2007, at 18.41, Hans van Thiel wrote:

> [snip]
>
> Thanks, Apfelmus, for the references. Guess I'll start there, then.  
> And
> thanks, Chris, for the info and code. Read only 'up pointers' could be
> what is needed. But before going on, I want first to get more
> confortable with programming with trees. It's all very well to say
> they're easy to roll, but lists are even simpler, and look at them...

I guess it's in the papers, too, but the chapter on zippers in the  
Wikibook is very nice, too:

   http://en.wikibooks.org/wiki/Haskell/Zippers

/ Thomas