understand self for attr_accessor class method

Question

class Test
  class << self
    attr_accessor :some

    def set_some
      puts self.inspect
      some = \'some_data\'
    end
    def get_some
      puts sel         


        

Answer 1

In the first example some is a local variable.

In the second one, some is a method of self. Why? Because attr_accessor :some is the same as:

def some= (val)
  @some = val
end

def some
  return @some
end

So, you have created the getter and setter methods for the instance variable @some (it's an instance variable of the object Test, as every class is also an object of class Class).