Defining case statement behaviour for Ruby class

case_statement_behaviour.rb

# to do it we have to define === method inside our class

class Ticket

  attr_accessor :venue, :date, :price
  
  def initialize(venue, date, price)
    self.venue = venue
    self.date = date
    self.price = price
  end
  
  def ===(other_ticket)
    self.venue == other_ticket.venue && self.date == other_ticket.date  
  end

end

# how to use
ticket1 = Ticket.new 'Town Hall', '01/01/2013', 50
ticket2 = Ticket.new 'Town Hall', '01/01/2013', 100
ticket3 = Ticket.new 'CMD', '01/02/2013', 50

case ticket2
when ticket2 then puts 'ticket 1 and ticket 2 are the same.'
when ticket3 then puts 'ticket 1 and ticket 3 are the same.'
else puts 'No match.'