adding attributes to a Ruby object dynamically

Question

I have an object created, and I want, based on some conditional check, to add some attributes to this object. How can I do this? To explain what I want:

A=O         


        

Answer 1

This adds the attribute to only the object:

a = Object.new
if (something happens)
  class << a
    attr_accessor :age
  end
  a.age = new_age_value
end