Ruby classes

classes.rb

#simple class
class Person
end

#inheritance
class Sarah < Person
end

#class with constructor arguments
class Jet
  def initialize(wingspan)
  end
end

#class with constructor argument that maps to public readonly property
class Ashley
  attr_reader :age
  def initialize(age)
    @age = age
  end
end

#class with methods
require 'restclient'
class TwitterService
  def tweet(status)
    RestClient.post("http://api.twitter.com/update", :status => status)
  end
end