From: Juozas Gaigalas <juozas@...>
Date: 2007-01-16T02:06:34+09:00
Subject: Re: Array#modified


>>   
> class Changed
>   def initialize(obj, &changed)
>     @obj = obj
>     @changed = changed
>   end
> 
>   def method_missing(id, *a, &b)
>     obj_before = @obj.clone
>     @obj.__send__(id, *a, &b)
>     if obj_before != @obj
>       @changed[@obj, id, a, b]
>     end
>   end
> end

I like this solution because it's short. However, it requires cloning 
the array every time a method is invoked on it, it seems that it would 
slow it down too much for my needs. I'm not sure.

I think I'll google for "ruby event framework" as Marc suggested.

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