What are the different visibility levels for methods in Ruby?

What are the different visibility levels for methods in Ruby?

In Ruby, there are three visibility levels for methods: public, protected, and private. Public methods can be called by anyone, protected methods can only be called within the class and its subclasses, and private methods can only be called within the class itself.

Can you give me examples of each visibility level?

Sure! Here's an example:

1. Public Method:

   class Example
     def public_method
       'I am public!'
     end
   end
   

2. Protected Method:

   class Parent
     protected
     def protected_method
       'I am protected!'
     end
   end
   class Child < Parent
     def access_protected
       protected_method
     end
   end
   

3. Private Method:

   class Example
     private
     def private_method
       'I am private!'
     end
   end
   

How do I call a private method from within the class?

You can call a private method from within another method of the same class. For example:

class Example
  private
  def private_method
    'I am private!'
  end

  public
  def call_private
    private_method
  end
end