Why use iterators instead of array indices?

Question

Take the following two lines of code:

for (int i = 0; i < some_vector.size(); i++)
{
    //do stuff
}

And this:

for (som         


        

Answer 1

I don't use iterators for the same reason I dislike foreach-statements. When having multiple inner-loops it's hard enough to keep track of global/member variables without having to remember all the local values and iterator-names as well. What I find useful is to use two sets of indices for different occasions:

for(int i=0;i

I don't even want to abbreviate things like "animation_matrices[i]" to some random "anim_matrix"-named-iterator for example, because then you can't see clearly from which array this value is originated.