Attr_accessor on class variables

Question

attr_accessor does not work on the following code. The error says \"undefined method \'things\' for Parent:Class (NoMethodError)\":

Answer 1

Аlso note that a singleton method is a method only for a single object. In Ruby, a Class is also an object, so it too can have singleton methods! So be aware of when you might be calling them.

Example:

class SomeClass
  class << self
    def test
    end
  end
end

test_obj = SomeClass.new

def test_obj.test_2
end

class << test_obj
  def test_3
  end
end

puts "Singleton methods of SomeClass"
puts SomeClass.singleton_methods
puts '------------------------------------------'
puts "Singleton methods of test_obj"
puts test_obj.singleton_methods

Singleton methods of SomeClass

test

---

Singleton methods of test_obj

test_2

test_3