How to find each instance of a class in Ruby

Question

Is there a way to get all the objects that are of a certain class in Ruby?

To clarify:

class Pokemon
end

pikatchu = Pokemon.new
charmander = Pokemon         


        

Answer 1

The solution is to use ObjectSpace.each_object method like

ObjectSpace.each_object(Pokemon) {|x| p x}

which produces

 => 2 

Details are discussed in the PickAxe book Chapter 25