Generate random country data (names and codes) in Ruby: ISO, IOC, FIFA and more

random_country.rb

require "normalize_country"  # need 0.1.0

module RandomCountry
  @@cache    = {}
  @@selector = [].respond_to?(:choice) ? :choice : :sample  # :choice is for Ruby < 1.9 

  def self.random(format)
    @@cache[format] ||= NormalizeCountry.to_a(format)
    @@cache[format].send(@@selector)
  end

  class << self
    NormalizeCountry.formats.each do |format|
      define_method(format) { random(format) }  
    end
  end
end

p RandomCountry.random(:alpha2)
p RandomCountry.alpha2
p RandomCountry.alpha3
p RandomCountry.short
# ...