require 'united_states'

UnitedStates.all
# => [#<UnitedStates::State::Designation...@string="WY">]
UnitedStates.names
# => [#<UnitedStates::State::Name...@string="Wyoming">]
UnitedStates.postal_codes
# => [#<UnitedStates::State::PostalCode...@string="WY"]
UnitedStates[:LA]
# => [#<UnitedStates::State::Designation...@string="LA">]
UnitedStates['mississippi']
# => [#<UnitedStates::State::Designation...@string="MS">]
UnitedStates['car']
# => UnitedStates::NoDesignationFoundError
        
      

        
require 'rails/local_subdomain'

class ApplicationController < ActionController::Base
  include Rails::LocalSubdomain
  ...
end