Hey Jonathan,

Thanks for the kudos, it's nice that this library is actually useful to 
people because I wrote it last year and it sat for a while.

I know you said you solved the problem you were having, I just figured I'd 
share a github repository of the prototype work I was doing on a UI Tree 
component in case you wanted to compare it to another idea. Again, I wrote 
this code a year ago so I don't know if it will be useful to you, but I was 
able to get a functioning UI tree that I was happy with.



On Tuesday, October 18, 2016 at 5:21:41 AM UTC-4, Jonathan Fishbein wrote:
> Actually might have gotten it to work!  Thanks again for making the library
> On Thursday, November 26, 2015 at 10:01:05 AM UTC-5, Tom Kidd wrote:
>> I am working on creating a Tree UI Component that would eventually use 
>> the Elm Architecture. In doing this work, I uncovered the need to be able 
>> to update and navigate tree data structures, and found Huet zippers as a 
>> reasonable starting point. I searched the the elm packages and didn't find 
>> an implementation, so I created one.
>> So far, the implementation is not complete (have not implemented 
>> attach/delete), but I believe it is still useful.
>> I am looking for feedback because I intend to use this code as a basis 
>> for the Tree Component, which I also intend to share when it is ready. This 
>> is my first package, so before I submitted it, I wanted to get some 
>> feedback. Anyone who is interested in this, please review at the following:
>> https://github.com/tomjkidd/elm-multiway-tree-zipper
>> *Resources*
>> *LYAH Zippers (used for tree updates)*
>> http://learnyouahaskell.com/zippers
>> *Elm Maybe Monad (needed for possible errors with traversal)*
>> https://groups.google.com/forum/#!topic/elm-discuss/hEvS6DgNbwM
>> https://github.com/maxsnew/Scramble/blob/master/Scramble/Utils.elm#L12-L27
>>  `andThen`, or &> could be used with Zipper a -> Maybe (Zipper a) to 
>> compose them together.
>> *Huet Zipper*
>> https://www.st.cs.uni-saarland.de/edu/seminare/2005/advanced-fp/docs/huet-zipper.pdf
>> I still would need to implement the attach and remove functions in order 
>> to create a useful library.

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