module Countries
module ISO3166
module ISO3166::CountryClassMethods
module ISO3166::CountryCurrencyMethods
module ISO3166::CountryFinderMethods
module ISO3166::CountrySubdivisionMethods
module ISO3166::Emoji
module ISO3166::LocalesMethods
module ISO3166::SubdivisionMethods
module ISO3166::TimezoneExtensions
module Sources
module Sources::CLDR
module Sources::CLDR::Downloader
module Sources::Local
class Country
class ISO3166::Configuration
class ISO3166::Country
class ISO3166::Data
class ISO3166::Subdivision
class ISO3166::Translations
class Sources::CLDR::Subdivision
class Sources::CLDR::SubdivisionUpdater
class Sources::Local::CachedLoader
class Sources::Local::Subdivision
countries
5.6.0
# valid_alpha2?
def valid_alpha2?(country) country.is_a?(String) && !ISO3166::Country.new(country).nil? end