ruby_comparable

ruby_comparable.rb

class Person
  
  include Comparable  
  attr_reader :name   
  
  def initialize(name)
    @name = name
  end
  
  def <=> other
    self.name <=> other.name
  end
  
end

p1 = Person.new 'Andrea'
p2 = Person.new 'Fabio'
p3 = Person.new 'Luigi'

p p1 < p2 #true
p p2 < p1 #false