#pragma once
 
#include <vector>
#include <string>
 
std::string get_first_uppercase_entry(std::vector<std::string> list);
std::vector<std::string> get_all_uppercase_entries(std::vector<std::string> list);

#include "if_for_each_element.hpp"
#include <algorithm> // for std::find_if and std::count_if
#include <cctype> // for std::isupper
 
std::string get_first_uppercase_entry(std::vector<std::string> list)
{
  std::vector<std::string> result;
 
  auto pos = std::find_if(
    list.begin(),
    list.end(),
    [&](std::string entry)
    {
      size_t numberOfUpperCaseChars = std::count_if(entry.begin(), entry.end(), [](unsigned char c)
      {
        return std::isupper(c);
      });
 
      return numberOfUpperCaseChars == entry.length();
    }
  );
 
  return pos == list.end() ? "" : *pos;
}
 
 
std::vector<std::string> get_all_uppercase_entries(std::vector<std::string> list)
{
  std::vector<std::string> result;
 
  std::for_each(list.begin(), list.end(), [&](std::string entry)
  {
    size_t numberOfUpperCaseChars = std::count_if(entry.begin(), entry.end(), [](unsigned char c)
    {
      return std::isupper(c);
    });
 
    if (numberOfUpperCaseChars == entry.length())
    {
      result.emplace_back(entry);
    }
  });
 
  return result;
}

https://en.cppreference.com/w/cpp/algorithm/find

https://en.cppreference.com/w/cpp/algorithm/for_each