From: Chris Pine <cpine@...>
Date: 2003-12-16T14:42:39+09:00
Subject: Re: Subclassing Array

----- Original Message ----- 
From: "Hans Fugal" <firstname@lastname.net>


> With a slight modification what you offered would work:
>
> class SimilArray
>     def initialize(ary)
> @ary=ary
>     end
>     include Notifier
>     def method_missing(:method,*args,&blk)
> @ary.send(:method,*args,&blk)
> notify # this is what's different
>     end
> end
>
> But it would always notify even on read-only operations, and so it's
> wasteful. But I could check by name for writing operations.
------------------------------

You could also test to see if the array has changed (clone it before sending
the message):  is it the same size with the same elements in the same order?
If so, then notify.

Chris Pine