text: // @pezy
  //
  // Exercise 10.17
  // Rewrite exercise 10.12 from  10.3.1 (p. 387)
  // to use a lambda in the call to sort instead of the compareIsbn function. 
  //
  // @See 7.26, 10.12
  
  #include <iostream>
  #include <string>
  #include <vector>
  #include <algorithm>
  #include "../ch07/ex7_26.h"     // Sales_data class.
  
  int main() {
      Sales_data d1("aa"), d2("aaaa"), d3("aaa"), d4("z"), d5("aaaaz");
      std::vector<Sales_data> v{d1, d2, d3, d4, d5};
  
      std::sort(v.begin(), v.end(), [](const Sales_data &sd1, const Sales_data &sd2) {
          return sd1.isbn().size() < sd2.isbn().size();
      });
  
      for (const auto &element : v)
          std::cout << element.isbn() << " ";
      std::cout << std::endl;
  
      return 0;
  }
  