What are abstract classes in Ruby?

What are abstract classes in Ruby?

Abstract classes in Ruby are classes that cannot be instantiated on their own and are meant to be subclassed.

How do I define an abstract class in Ruby?

You can define an abstract class in Ruby by using the abstract keyword in a class definition, typically with the help of a gem like 'active_support'.

Can you give me an example of an abstract class?

Sure! Here's a simple example:

class Animal
  def speak
    raise NotImplementedError, 'This is an abstract method'
  end
end

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

What happens if I try to instantiate an abstract class?

If you try to instantiate an abstract class, you'll get an error because abstract classes are not meant to be instantiated.