Re: Re: Useful utility function: org-sort-multi

From: Carsten Dominik <carsten.dominik@gmail.com>
To: "Ryan C. Thompson" <rct@thompsonclan.org>
Cc: emacs-orgmode@gnu.org
Subject: Re: Re: Useful utility function: org-sort-multi
Date: Mon, 31 Aug 2009 07:40:42 +0200	[thread overview]
Message-ID: <0D40B28E-0CD1-4FD3-9EC9-74BDD14494AC@gmail.com> (raw)
In-Reply-To: <4A9AE751.2080208@thompsonclan.org>

Hi Ryan, hi Benjamin

Yes, I think I was mistaken, I firth though this would not work  
correctly
with more that 2 criteria, but I think now that it does in fact work.

While I think about the if and how to add this, you might just want to
go ahead and add it to the org-hacks.org file on Worg.....

- Carsten

On Aug 30, 2009, at 10:55 PM, Ryan C. Thompson wrote:

> Benjamin Andresen wrote:
>
>> if you have the following list
>> * Test Sorting
>> ** TODO Charlie
>> ** WAITING Beta
>> ** TODO Alpha
>> ** STARTED Beta
>> ** STARTED Charlie
>> ** TODO Beta
>> ** STARTED Alpha
>> ** WAITING Charlie
>> ** WAITING Alpha
>
>> calling org-multi-sort with ?o ?a will sort it like this
>> * Test Sorting
>> ** TODO Alpha
>> ** TODO Beta
>> ** TODO Charlie
>> ** STARTED Alpha
>> ** STARTED Beta
>> ** STARTED Charlie
>> ** WAITING Alpha
>> ** WAITING Beta
>> ** WAITING Charlie
>
>> but just ?a would completely ignore the TODO, STARTED, WAITING order.
>
>> Thanks Ryan, pretty useful.
>
>
>> br,
>> benny
>
>
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>
> That's right, the function relies on the fact that org's sorting is  
> stable. So the results of earlier sorts are preserved as much as  
> possible in later sorts. Of course, this is really inefficient, but  
> oh well.
>
> As another test case, try using (org-sort-multi ?o ?p) on this:
> * Multi-sort test
> ** DONE [#B]
> ** TODO [#C]
> ** STARTED [#C]
> ** STARTED [#A]
> ** DONE [#C]
> ** TODO [#B]
> ** TODO [#A]
> ** STARTED [#B]
> ** DONE [#A]
>
>
> Anyway, Carsten, if you think this would be useful, feel free to  
> include some variant of this in org-mode itself. You'd probably want  
> to implement it as a one-pass sort in which the set of sorting  
> criteria function as a series of fallbacks for tiebreakers, rather  
> than a series of sorts.
>
> Ryan
>
>
>
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