gistfile1.txt

languages = ["Ruby", "JavaScript", "HTML", "CSS"]
languages.is_a?(Array)
languages.is_a?(Object)
languages.is_a?(BasicObject)
languages.ancestors

class Person # < Object
  attr_reader :name
  def initialize(name)
    @name = name
  end
end

class Dudette < Person
end

Person.ancestors # => [Person, Object, Kernel, BasicObject]
Dudette.ancestors # => [Dudette, Person, Object, Kernel, BasicObject]

Array.ancestors

class Person
  attr_reader :first_name, :last_name

  def initialize(first_name, last_name)
    @first_name = first_name
    @last_name = last_name
  end

  def full_name
    "#{first_name} #{last_name}"
  end

  def catch_phrase
    "Howdy, Citizen!"
  end
end

class Dude < Person
  def full_name
    "Mr. #{super}"
  end

  def catch_phrase
    "What’s your damage?"
  end

  def to_s
    "#{full_name}. Dude"
  end
end


languages = ["Ruby", "JavaScript", "HTML", "CSS"]
languages.each_with_index do |language, i|
  puts i, language
end