From: Mark Wilden <mark@...>
Date: 2008-05-24T13:11:47+09:00
Subject: Re: Ruby observer module

On May 23, 2008, at 12:34 PM, S2 wrote:

> Yes, in this case it makes sense, but think of this:
>
>  def do_stuff
>    @mint = 'blue'
>    notify_observers
>  end
>
> Nice and clean, isn't it?
> If I implement something like you sad, wouldn't it make more sense  
> to create
> a @changed variable in the Subject class, and call notify_observers  
> only if
> @changed == true instead of forcing a call to changed every time?

Maybe it's because there might be another event beside changed ?

///ark