From: Paul Smith <paulsmithos123@...>
Date: 2007-01-11T13:36:08+09:00
Subject: Re: statement outside of any method in a class

Thanks for the explanation David.

However, it is still not clear to me when these statements are invoked.

In your example, what triggers the execution of the 2 statements?

>    class C < SomeClass
>      puts "self right now is #{self}."   # self right now is C.
>      do_something                        # Hi!
>    end

When the class is loaded, when an instance of that class is created?
Is this similar to a static initialization block in Java?

P.

>> Could someone explain what the invocation model is
>> for that statement that is not bound to any method
>> within a class (i.e. when is that statement executed?)
> 
> It's the same, in the abstract, as the invocation model generally: a
> "bareword"-style method is automatically invoked on the current
> default object, self.  At the outer level of a class definition, self
> is the class object itself.  So what you're seeing is a call to a
> class method.
> 
> Here's a little X-ray of what's going on:
> 
>    class SomeClass
>      def self.do_something
>        puts "Hi!"
>      end
>    end
> 
>    class C < SomeClass
>      puts "self right now is #{self}."   # self right now is C.
>      do_something                        # Hi!
>    end
> 
> There are more nuances but that's the basic scenario.
> 
> 
> David


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