irb(main):001:0> class People
irb(main):002:1> def initialize(first_name, last_name)
irb(main):003:2> @first_name = first_name
irb(main):004:2> @last_name = last_name
irb(main):005:2> end
irb(main):006:1> attr_accessor :first_name
irb(main):007:1> attr_accessor :last_name
irb(main):008:1> end
=> nil
irb(main):009:0> person1 = People.new("diego", "viola")
=> #<People:0xb7cfcc10 @first_name="diego", @last_name="viola">
irb(main):010:0> eval "person1.first_name + ' ' + person1.last_name"
=> "diego viola"
irb(main):011:0> person2 = People.new("dark", "mage")
=> #<People:0xb7cea90c @first_name="dark", @last_name="mage">
irb(main):012:0> eval "person2.first_name + ' ' + person2.last_name"
=> "dark mage"