in lib/twitter_cldr/js/renderers/implementation/shared/postal_codes_renderer.rb [13:19]
def postal_codes
TwitterCldr::Shared::PostalCodes.territories.inject({}) do |ret, country_code|
ret[country_code] = "^#{TwitterCldr::Shared::PostalCodes.for_territory(country_code).regexp.source}$"
ret
end.to_json
end