Re: [ROOT] sorting TCollections

From: Fons Rademakers (Fons.Rademakers@cern.ch)
Date: Sun Nov 18 2001 - 22:54:13 MET


Hi Pasha,

  I'll look into it and provide something coming week.

Cheers, Fons.



On Sunday 18 November 2001 21:22, Pasha Murat (630)840-8237 FNAL 
(630)859-3463 home wrote:
> Dear Rooters,
>
> some time ago (see http://root.cern.ch/root/roottalk/roottalk00/3261.html)
> we discussed extending sorting functionality of TCollections by adding
> one more sort method which would be looking as follows:
>
> void TSecCollection::QSort(less),
>
> where `less' is a comparison function for 2 objects with the signature
>
> Int_t less(TObject* a, TObject* b);
>
> Such a method would allow to sort ROOT collections using an external
> function to compare 2 objects and hence w/o the need to modify the class
> definitions in case one wants to reorder the objects stored in a collection
> in a different way.
>
> I'd like to reiterate on this request - it would be nice to have it in
> production release of 3.02 and I again apologise if I missed something
> which has already been coded in.
> 						thanks a lot, Pasha
>
> P.S. Otherwise I'm pretty much willing to provide the implementation.

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