====== C - C++ Lists - Search lists for certain elements ======

===== if_for_each_element.hpp =====

<code cpp>
#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);
</code>

----

===== if_for_each_element.cpp =====

<code cpp>
#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;
}
</code>

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===== References =====

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

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