From: Morton Goldberg <m_goldberg@...>
Date: 2007-11-13T03:36:52+09:00
Subject: Re: class <<Time ?

On Nov 12, 2007, at 8:54 AM, Gamont Gamont wrote:

> Im see this example and i didnt understand how it works.
> I dont find doc abou this construct.
>
> I find about object-specific class (class <<a), but here
> its a class.
>
> class <<Time
>   alias old_now now
>   def now
>     old_now.to_f * FACTOR
>   end
> end
>
> and when this statement executes
>
> Time.now, it calls the method in anonymous class and
> no more in Time class.

No, this code doesn't change where the 'now' method resides. Time.now  
always calls the 'now' method in its singleton class.

> How this works ?

It works because Time is an object as well as a class. So Time can  
(and does) have a singleton class (what you call an object-specific  
class) just as any other object can. The singleton class of a class  
is where class methods are defined, so the code you show simply  
overrides the Time class method 'now'.

Regards, Morton