AW: [Insight-users] STL vector iterator

[salah]

Thanks Frederic,

one more question please.

I am calling the erase function to erase the elements of the vector
between these two iterators as follows:

   std::cout << "Contour length BEFORE cutting = " << contour.size() << std::endl;
   contour.erase(startIter, endIter);
   std::cout << "Contour length AFTER cutting = " << contour.size() << std::endl;

The strange thing is that the printed length of the counter after erasing 
elements is greater than before!

Could you guess what is going on?

Many thanks,

Zein



> -----Ursprüngliche Nachricht-----
> Von: FREDERICPCX [mailto:FREDERICPCX at terra.es]
> Gesendet: Wednesday, August 11, 2004 4:57 PM
> An: salah
> Cc: insight-users at itk.org
> Betreff: Re: [Insight-users] STL vector iterator
> 
> 
> 
> Hello Zein,
> 
> if your vector is called v, maybe you can simply use something like
> the following:
> 
> if (distance(v.begin(), iter1) < distance(v.begin(), iter2) { ...
> 
> Beware that calling some methods on the STL containers can invalidate
> their related iterators. More in Chapter 23 of the 1997 C++ Public
> Review Document: http://anubis.dkuug.dk/jtc1/sc22/open/n2356/
> 
> Hope this helps,
> 
> Frederic
> 
> ----- Mensaje Original -----
> De: "salah" <salah at gris.uni-tuebingen.de>
> Fecha: Miercoles, Agosto 11, 2004 4:38 pm
> Asunto: [Insight-users] STL vector iterator
> 
> > Hello,
> > 
> > I am using two iterators to point to two different 
> positions on an STL
> > vector. I want to decide which iterator is advancing more that the 
> > other.is it meaningful to just compare the two iterator? i.e. 
> > something like this
> > 
> >   typedef std::vector< ...... > VectorType;
> >   VectorType::iterator  iter1, iter2;
> >   ....
> >   ....
> >   if (iter1  < iter2) {
> >      ....
> >      ....
> >   } 
> > 
> > or something else is needed. This comparison does not seem 
> > to work by me.
> > 
> > Thanks,
> > Zein
> > _______________________________________________
> > Insight-users mailing list
> > Insight-users at itk.org
> > http://www.itk.org/mailman/listinfo/insight-users
> > 
> 
> 
>