The standard way of doing this is to just pass your iterator to std::vector::erase(). Take note that doing so invalidates active iterators. So, if you are doing this in a loop, you need something like

erase removes the element, and for a vector will preserve order and copy all the other elements up one. A list on the other hand would just pop the element out of the list without having to copy anything.

Your other option is to make a predicate function for std::remove_if along with std::erase

remove_if does your swap-to-end trick for all values that isInActive returns true. Then it gives you an iterator to the begining of the segment to erase.