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 <string>
int main()
{
std::vector<std::string> strings = {"banana", "apple", "cherry"};
std::vector<unsigned> indices = { 0, 1, 2 };
std::sort(indices.begin(), indices.end(),
[&strings](unsigned i, unsigned j) {
return strings[i] < strings[j];
});
}