enumerable_aggregate6.cpp

Shows how to use xtd::linq::enumerable::aggregate method.

#include <xtd/xtd>
 
auto main() -> int {
  auto fruits = array<string> {"apple", "mango", "orange", "passionfruit", "grape"}.items();
  
  // Determine whether any string in the array is longer than "banana".
  auto longest_name =
  from(fruits).aggregate("bananas",
    [](const string& longest, const string& next) {return next.length() > longest.length() ? next : longest;},
    // Return the final result as an upper case string.
    [](const string& fruit) {return fruit.to_upper();});
  
  console::write_line("The fruit with the longest name is {}", longest_name);
}
 
// This code produces the following output :
//
// The fruit with the longest name is PASSIONFRUIT