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  1. #include <iostream>
  2. #include <vector>
  3. #include <list>
  4. #include <functional>
  5. #include <algorithm>
  6.  
  7. template<typename T, typename U>
  8. void apply(T collBegin, T collEnd, std::function<bool(U const &)> f1, std::function<U(U const &)> f2, std::function<U(U const &)> f3)
  9. {
  10. 	std::for_each(collBegin, collEnd, [&](auto &el) { el = f1(el) ? f2(el) : f3(el); });
  11. }
  12.  
  13. int main()
  14. {
  15. 	std::function<bool(int const &)> predicate = [](int const &arg) -> bool { return arg % 2 == 0; };
  16. 	std::function<int(int const &)> passed = [](int const &arg) -> int { return arg / 2; };
  17. 	std::function<int(int const &)> rejected = [](int const &arg) -> int { return (3 * arg) + 1; };
  18.  
  19. 	int arr[]{ 1,2,3,4,5,6,7,8,9 };
  20. 	apply(arr, arr + sizeof(arr)/sizeof(int), predicate, passed, rejected);
  21.  
  22. 	std::vector<int> vec(arr, arr + sizeof(arr) / sizeof(int));
  23. 	apply(vec.begin(), vec.end(), predicate, passed, rejected);
  24.  
  25. 	std::list<int> lis(vec.begin(), vec.end());
  26. 	apply(lis.begin(), lis.end(), predicate, passed, rejected);
  27.  
  28. 	for (auto e : lis) std::cout << e << " ";
  29. 	std::cout << '\n';
  30. }
Success #stdin #stdout 0s 4544KB
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1 2 16 4 4 5 34 1 7
https://ideone.com/A30Dl9
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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