Block helper in Rails 3

example.rb

# FrontendHelper presentation PORO

    def flag_for_country_code(country_code, &block)
      country = ::Refinery::Professionals::GeoipCountry.find_by_country_code(country_code)
      if country && country.available_locales.any?
        flag_locale = country.available_locales.first
        flag_url = "/#{flag_locale}"
        country_name = country.name

        yield(flag_url, country_name)
      end
    end
    
# In view

      <% flags.each do |hsh|  %>
        <% flag_for_country_code(hsh[:country_code]) do |url, country_name| %>
          <a href="<%= url %>" class="g--item g--two flag grad--dark-grey-inverted">
            <%= image_tag "flags/#{hsh[:asset_name]}.png", size: "80x44", alt: "" %>
            <p><%= country_name %></p>
          </a>
        <% end if @available_countries.include?(hsh[:country_code]) %>
      <% end %>

Credit to @Sailias - for helping me to skip using the capture helper
and @workmad3 - for the reminder of etag generation in production