Levente, Not meaning to be confrontational, but finalization does not happen "in" any type of collection. It happens *to* elements that can be held in any type of weak collection. As a result, they should all be thread safe and self-repairing.
Bill ________________________________________ From: [email protected] [[email protected]] on behalf of Levente Uzonyi [[email protected]] Sent: Monday, December 26, 2011 3:10 PM To: [email protected] Subject: Re: [Pharo-project] Destiny of changed:/update: On Mon, 26 Dec 2011, Schwab,Wilhelm K wrote: > Stef, I completely agree that events/announcements are cleaner and easier to understand than changed/update. I don't really care whether or not the latter is removed, because I never (directly) use it. Others might prefer to have it retained?? I'm not supposed to say where<g>, but I have seen events, weak collections and finalization done *really* well. In fairness, my working image is old and I need to take another stab at building a recent image, but when I last reviewed them, Pharo's weak collections were lacking features. They have to be thread safe, and they need to clear nil entries left behind by finalization (which is why they must be thread safe). The better we get with events (#on:send:to and friends), the more the current weak collections will appear to be lacking. Finalization only happens in WeakRegistries and those are thread safe. The other weak collections are not subject to finalization, therefore they don't have to be thread safe, that's why they aren't. Levente Bill ________________________________________ From: [email protected] [[email protected]] on behalf of Stéphane Ducasse [[email protected]] Sent: Monday, December 26, 2011 10:56 AM To: [email protected] Subject: Re: [Pharo-project] Destiny of changed:/update: using on:send: instead of changed/ is a nice way to reduce extra updates. In Cuis juan kept only one mechanism and I like that. In VisualWorks you have to use on:send:to: this way you can select with facet is refreshed. So I would like to deprecated changed. Stef > Will changed:/update: disappear and be totally replaced by Announcements? > > I ask because I'm using ListModel and noticed that it sends a generic "self > changed: #selectionIndex". I built a GUI that had two of them, and couldn't > differentiate between the updates, so I was going to enhance it a little. > > -- > View this message in context: > http://forum.world.st/Destiny-of-changed-update-tp4234693p4234693.html > Sent from the Pharo Smalltalk mailing list archive at Nabble.com. > >
