[cs13001] Question after class

[Mikhail Nesterenko]

CSI students,

Ignore this discussion. It was mant for a different mailing list.

Thanks,
--
Mikhail

Mikhail Nesterenko wrote:
> 
> 
> > There was a question after class about modifying a container in a
> > loop without breaking things with the iterator. I had mentioned my
> > solution in Java and you wanted to look up what the standard was for
> > C++.
> 
> 
> In general, modifying a container invalidates iterators. However,
> operations that invalidate iterators often return "convenient"
> iterators. For example, erase() returns the iterator to the next
> element (in the updated container) after the one erased. Hence the
> idiom:
> 
> for(vector<int>::iterator it=myVector.begin(); 
>     it != myVector.end(); 
>     /* no increment here */)
>     if(must_erase)
>         it = myVector.erase(it);
>     else
>         ++it;