Question

which STL Algorithm should i use if I want to find something but Don’t want it to return last if not found?

My use case is I need to find or return null in the vector of user-defined types.

Find and Find_If seem to return the last item if not found. I need to do “someting else” if the element is not found.

Thanks

Answer 1

The .end() if a vector does not point to the “last item”, but the empty space after the last item. If you need to do something else, just put it in a condition.

std::vector<T>::iterator it = std::find(vec.begin(), vec.end(), .....);
if (it != vec.end())
{
   // object found
   return *it;
}
else
{
   // do something else
   return NULL;
}