From: Joel VanderWerf <vjoel@...>
Date: 2004-12-06T14:32:12+09:00
Subject: Re: Freezing Variable Assignment

Austin Ziegler wrote:
> On Mon, 6 Dec 2004 11:51:55 +0900, Nicholas Van Weerdenburg
> <vanweerd@gmail.com> wrote:
...
>>It's in the same vein that I think Observable should target a
>>instance variable (an attribute, more generally) of an object,
>>rather than an entire object.
> 
> 
> Why?

It's useful in GUI code, where each control, field, etc. is wired up to 
one or more attrs in the window instance, and other related windows can 
be wired up to those attrs too, to keep their state synchronized. See, 
for instance, foxtails on raa, which uses FXRuby and observable (also on 
raa). That observable lib (which should have been called 
observable-attr) is just what Nicholas described: it makes attrs observable.