Removing item from vector while iterating?

Question

I have a vector that holds items that are either active or inactive. I want the size of this vector to stay small for performance issues, so I want items that have been mark

Answer 1

You can do that but you will have to reshuffle your while() a bit, I think. The erase() function returns an iterator to the element next after the erased one: iterator erase(iterator position);. Quoting from the standard from 23.1.1/7:

The iterator returned from a.erase(q) points to the element immediately following q prior to the element being erased. If no such element exists, a.end() is returned.

Though maybe you should be using the Erase-remove idiom instead.