The following code example is taken from the book
C++ Templates - The Complete Guide, 2nd Edition
by David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor,
Addison-Wesley, 2017
© Copyright David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor 2017
#include <vector>
#include <algorithm>
#include <iterator>
int main()
{
std::vector<Person> authors = { {"David", "Vandevoorde"},
{"Nicolai", "Josuttis"},
{"Douglas", "Gregor"} };
std::copy(project(authors.begin(), &Person::firstName),
project(authors.end(), &Person::firstName),
std::ostream_iterator<std::string>(std::cout, "\n"));
}