fork download
copy 
  1. #include <iostream>
  2. #include <vector>
  3. #include <map>
  4. #include <memory>
  5. #include <iterator>
  6. #include <algorithm>
  7.  
  8. class Element {};
  9.  
  10. int main()
  11. {
  12.     std::map<std::string, std::shared_ptr<Element>> m
  13.         {
  14.             { "hello", std::make_shared<Element>() },
  15.             { "world", std::make_shared<Element>() }
  16.         };
  17.     std::vector<Element> v;
  18.  
  19.     std::transform(m.begin(),
  20.                    m.end(),
  21.                    std::back_inserter(v),
  22.                    [](decltype(*m.begin())& p)
  23.                    {
  24.                        return *p.second;
  25.                    });
  26.  
  27.     std::cout << v.size() << "\n";
  28.     return 0;
  29. }
  30.  
Success #stdin #stdout 0s 3036KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
2
https://ideone.com/ao1C50
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!