car.rb

irb(main):016:1* class Car
irb(main):017:1*   attr_accessor :model
irb(main):018:1*
irb(main):019:2*   def pretty_name
irb(main):020:2*     model + " pretty"
irb(main):021:1*   end
irb(main):022:0> end
=> :pretty_name
irb(main):023:0> c1 = Car.new
=> #<Car:0x00007ff7598f1aa8>
irb(main):024:0> c1.model = "c1"
=> "c1"
irb(main):025:0> c1.pretty_name
=> "c1 pretty"
irb(main):026:0> c2 = Car.new
=> #<Car:0x00007ff759941cb0>
irb(main):027:0> c2.model = "c2 model"
=> "c2 model"
irb(main):028:0> c2.pretty_name
=> "c2 model pretty"