Hi Jean-Eric,
I have some difficulty understanding what you want to do,
but your solution will be VERY VERY innefficient.
You should simply do:
if (!list->FindObject(obj)) list->Add(obj);
Rene Brun
On Thu, 5 Jun
2003, Jean-Eric Campagne wrote:
> Hi Fons,
>
> What do you think of the following routine...
>
> Chers. Jean-Eric
>
> //-------------------------------------------------------------------------
> ---/
> #include <set>
> typedef std::set<void*> AddressBook;
>
>
> void SecureDelete(TList* aList) {
> AddressBook uniqueInstanceSet; //Address Container with unique instance
> pair<AddressBook::iterator,bool> rc;
>
> TIter next(aList);
> TObject* aObj;
> //referencer les addresses dans un set (une entree par adresse differente)
> while ( (aObj = next()) ) {
> rc = uniqueInstanceSet.insert((void*)aObj);
> if (rc.second) {// the objet has not been referenced so it can be
> deleted
> delete aObj;
> }
> }//eow
> //Use Clear with nodelete option to reset the List wo deletion of the
> objects
> //as they have been deleted in previous while loop.
> aList->Clear("nodelete");
> }
>
> --On mercredi 4 juin 2003 21:33 +0200 Fons Rademakers
> <Fons.Rademakers@cern.ch> wrote:
>
> > Hi Jean-Eric,
> >
> > this cannot be done automatically, you have to make some add method
> > that first looks if the object is already in the list (like
> > list->FindObject(newObj)) and only add the method if FindObject()
> > returns 0.
> >
> > Cheers, Fons.
> >
> >
> > On Wed, 2003-06-04 at 16:05, Jean-Eric Campagne wrote:
> >> Hello,
> >>
> >> If I make add twice the same instance of an object in a TList, then at
> >> the Delete phase of the TList there is a crash for known reason.
> >> How, I can ask the TList to keep Unique Instance of an Object?
> >>
> >> Regards
> >> Jean-Eric Campagne
> >>
> >> ........................................................................
> >> ... .LAL - IN2P3 - CNRS
> >> .LAL - B.P 34 - 91898 Orsay Cedex - France
> >> .Piece 108
> >> .Tel +33 (0)1 64 46 84 29
> >> .Fax +33 (0)1 64 46 83 97
> >> ........................................................................
> >> ...
> > --
> > Org: CERN, European Laboratory for Particle Physics.
> > Mail: 1211 Geneve 23, Switzerland
> > E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
> > WWW: http://root.cern.ch/~rdm/ Fax: +41 22 7679480
> >
>
>
>
> ...........................................................................
> .LAL - IN2P3 - CNRS
> .LAL - B.P 34 - 91898 Orsay Cedex - France
> .Piece 108
> .Tel +33 (0)1 64 46 84 29
> .Fax +33 (0)1 64 46 83 97
> ...........................................................................
>
>
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:12 MET