Ruby Inheritance

ruby_inheritance.rb

# Inheritance is an important idea for Object Orientated Programming OOP
# This example will demo a simple example of inheritance

class Dog
  def talk
    puts "Woof"
  end
end

class JackRussell < Dog
end

class BichonFrise
end

roo = JackRussell.new
roo.talk
#Returns
"Woof"

candy = BichonFrise.new
candy.talk
#Returns 
" undefined method `talk' "

# Notice that the class JackRussell inherits from the class Dog on line 10.

# While JackRussell has no talk method defined, it inherits the talk method
# from the parent or Super class of Dog. This is why roo.talk returns "Woof"

# Meanwhile candy.talk returns undefined method as it is talk is not defined
# in the class BichonFrise nor did it inherit from the class Dog (line 21)