Question

I use something like this:

map<string, Data>::iterator it  = mymap->begin();
map<string, Data>::iterator end = mymap->end();

while (it != end) {
    // do stuff
    ++it;
}

I was just wondering if this would work even if the map is empty.
I couldn’t find any information about the return of map::begin() if the map ist empty.

Answer 1

If the map is empty, the begin and end iterators are equal, i.e. returns mymap->end().