Proposal: Add a catamorphism on Trees

[Tikhon Jelvis]

I was just thinking about refactoring some code to a tree fold—I had
assumed it was in the library already, and only realized it wasn't when I
saw this thread.

Definite +1.
On May 18, 2016 8:28 AM, <amindfv at gmail.com> wrote:

> +1
>
> Tom
>
>
> El 18 may 2016, a las 08:55, Jake McArthur <jake.mcarthur at gmail.com>
> escribió:
>
> +1 from me as well. I think I'm unlikely to ever turn down a
> straightforward catamorphism or anamorphism.
>
> On Wed, May 18, 2016, 8:52 AM Alp Mestanogullari <alpmestan at gmail.com>
> wrote:
>
>> +1, have implemented it in a few occasions already.
>>
>> On Tue, May 17, 2016 at 11:03 PM, David Feuer <david.feuer at gmail.com>
>> wrote:
>>
>>> Daniel Wagner would like to add the following straightforward function
>>> to Data.Tree. I think this is a grand idea.
>>>
>>> foldTree :: (a -> [b] -> b) -> Tree a -> b
>>> foldTree f = go
>>>   where
>>>     go (Node x ts) = f x (map go ts)
>>> _______________________________________________
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>>> Libraries at haskell.org
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>>>
>>
>>
>>
>> --
>> Alp Mestanogullari
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>>
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