Re: [Haskell-beginners] Tying the knot with binary trees

Hi Markus,

They say that for this or similar reasons you have to use a zipper, but I know nothing more about them than this :-)

Thanks for the hint. I hadn't heard of zippers before and after some reading, they indeed seem to do the trick, although I have yet to implement it in my solution. Anyways, here are the resources which worked best for my understanding: [1] http://en.wikibooks.org/wiki/Haskell/Zippers [2] http://learnyouahaskell.com/zippers Best, Michael