The problem is understanding how single methods work in Ruby

I am struggling to understand how single methods work in Ruby at the object level. When I define a simple Person class and add a singleton method and instance methods and try to access the id of the eigenclass of that object, it returns different IDs. Simply put, this is my test code.

class Person

 attr_accessor :someAccessor

  def method1
    puts "instance object id of Person  = #{self.object_id}"
    puts "Eigenclass object id of person instance object
      #{(class << self; self;end).object_id}" #Line 8 - object id 22609690
  end

  puts "Person eigenclass object id #{(class << self; self;end).object_id}"

  def self.printSingletonPersonObjectId
    puts self.object_id
  end

 class << Person

   puts "Inside Person eigenclass and its object id #{self.object_id}" #line 19 - 22609860

 def uniqueForAllPeople
    puts "Person eigenClass object id accessing from a Person class
    class method #{self.object_id}" #Line 23 - 22609840
  end
 end
end

prsn1 = Person.new


class << prsn1
  def prsn1_specific_method
   puts "prsn1 object eigen class object id #{self.object_id}" #Line 35 - 22609820
  end
end

      

        
        
        
      

    

Now I add the prsn1_specific_method method to the Singleton class instance of the Person object instance and get its object ID (line 8). Then, in the case of method1 , I can access the same class (line 35), if I'm correct. (The line numbers might be wrong, so I cleared them up for clarity.) Why are there two different object IDs if they are part of the same singleton class created for this prsn1 object .

And also for the Person ID of the Line class and the IDs of the Line 23 objects are also different if they are part of the same singleton created for the Person class. Am I doing something wrong with accessing the object? Please if someone can give me a better explanation of how class objects are related when one method is created for one object.

One more thing: without using "singleton" and including Singleton as a module, I need to create my own method that I added (for example, the Array class), available only as one method, even if I create hundreds of array objects.

thank