How can I know whether a class is inherited from another one? Some methods like is_a?

Question

Simple example:

class A
end

class B < A
end

Then, how can I judge whether class B is inherited from class A? Is there a method somehow like is_a? or maybe called is_child_of??

I can't find one.

Answer 1

You can use the < operator:

B < A will be true, if B is a subclass of A.