latta at interval.com
Tue Mar 3 23:59:05 UTC 1998
> You really don't have to "throw away" anything.
Indeed; I was only using those words in reference to Dan's plan-of-attack message (same for "throwing a party"). I know one doesn't need to throw away anything; I'm familiar with what has been done in prototype systems to get class-like behavior (e.g., Self), as well as class-based work to get prototypical behavior (e.g., Johnson, Hinkle).
> From a "class" consumer's point of view, there's no difference between
> a class and a proto with the clone method renamed "new".
I disagree. I think the objects answered by each are very different. The behavior of an object answered by a prototype is much less likely to be changed by parties unassociated with the sender, for example. You can't ignore your roots. :)
> The only difference is more flexibility for the developer and you can limit
> that however you like in the development enviroment. The earlier point that
> flexibility/freedom is dangerous...
I think that's an unfair oversimplification of the point. I don't think the concern was with whether flexibility and freedom are dangerous. I think it was with how a system may be usefully organized. Personally, I'm not concerned in this discussion with making life "safer" for developers. I'm interested in making the system easier to understand and navigate.
So I think what you go on to write...
> Smalltalk has already made this trade off though. The fact that you can
> change a system class at runtime in Smalltalk means it's quite easy to corrupt
> the entire system from within it. But this is also very powerfull.
...is a cop-out (no offense intended). Somewhat like saying "Well, driving a car is dangerous, so I might as well ignore all the traffic laws; at least I'll get there faster", ignoring the fact that many traffic laws (not all :) make driving easier and correlate strongly with common sense. Hmm, perhaps that analogy isn't very good; oh well. ;)
composer and computer scientist
craig.latta at netjam.org
latta at interval.com
Smalltalkers do: [:it | All with: Class, (And love: it)]
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