How can I detect the last iteration in a loop over std::map?

Question

I\'m trying to figure out the best way to determine whether I\'m in the last iteration of a loop over a map in order to do something like the following:

for          


        

Answer 1

Surprised no one mentioned it yet, but of course boost has something ;)

Boost.Next (and the equivalent Boost.Prior)

Your example would look like:

for (iter = someMap.begin(); iter != someMap.end(); ++iter) {
    // do something for all iterations
    if (boost::next(iter) != someMap.end()) {
        // do something for all but the last iteration
    }
}