How can I extend a Ruby class?

How can I extend a Ruby class?

You can extend a Ruby class by using the class keyword followed by the class name and the < symbol to inherit from another class.

Can you show me an example of extending a class?

Sure! Here's a simple example:

class Animal
  def speak
    "Hello!"
  end
end

class Dog < Animal
  def speak
    "Woof!"
  end
end

dog = Dog.new
puts dog.speak  # Outputs: Woof!

What if I want to add a method to the existing class?

You can add a method to the existing class by reopening the class and defining the new method. For example:

class Animal
  def eat
    "Eating..."
  end
end

Is it possible to override methods in the subclass?

Yes, you can override methods in the subclass by defining a method with the same name. The subclass method will take precedence.