module ISO3166::CountryFinderMethods

def find_all_by(attribute, val)
  attributes, lookup_value = parse_attributes(attribute, val)
  ISO3166::Data.cache.select do |_, v|
    country = Country.new(v)
    attributes.any? do |attr|
      Array(country.send(attr)).any? do |n|
        lookup_value === cached(n) { parse_value(n) }
      end
    end
  end
end