Re: [ROOT] TObjectSet/TDataSet vs. TFolder (Was: TFolder: examples? and a bug.)

From: Rene Brun (Rene.Brun@cern.ch)
Date: Tue Jun 26 2001 - 18:57:06 MEST


Hi Brett,

There is a fundamental difference between TFolder and TDataSet.
TDataSet is an interesting container. TFolder is NOT a container.
It is a white board where you post references to your objects or
containers. TFolder has an additional functionality: From a TFolder,
you can generate automatically a TTree (or several TTrees).

Rene Brun

On Tue, 26 Jun 2001, Brett Viren wrote:

> Valeri Fine writes:
>  > 
>  > Please find the example of TDataSet class test.
> 
> I don't find this test. Valeri, can you point it out? 
> 
> In the mean time, I have looked over the TObjectSet/TDataSet classes
> and the document you gave and also the TFolder class and Rene's
> example (thanks!).  These two indeed seem to do much of the same
> things.  
> 
> Can someone give a comparison between the two from an end-user
> (programmer) point of view.
> 
> The particular context in which I am interested is a system where
> various reconstruction modules and chains of modules can register
> themselves, their various entry points, and their configuration
> parameters in such a way that they can be accessed from a GUI
> (menus/browser) or at the prompt.
> 
> Thanks,
> -Brett.
> 



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