Ok, I get it. So, if i were to write a method which forced a bunch of anonymouse objects to be created, the GC should fire, and i should be able to tell if it worked? Let me give that a try.
--- In flexcoders@yahoogroups.com, "Matt Chotin" <[EMAIL PROTECTED]> wrote: > > Using a dictionary isn't completely reliable because the garbage > collector will only free up what it needs. If the window isn't taking > too much space the collector may not go ahead and clean it up for a > while. The weak reference only says "take it if you need it" but it's > not guaranteed that if the only reference is weak that it will disappear > immediately. That's why we trigger garbage collection by creating a > bunch of objects, it's to force the GC into thinking it needs the space > for allocation. > > > > Matt > > > > ________________________________ > > From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On > Behalf Of jeff tapper > Sent: Thursday, July 27, 2006 9:41 AM > To: flexcoders@yahoogroups.com > Subject: [flexcoders] Re: Tools for listing objects > > > > Really, what im looking for, is some way to check if an object no > longer exists. I thought a weak reference in the dictionary might > work for me, but after 14 hours of inactivity, those weak references > are still there. > > Am i misunderstanding the nature of a weak reference? Is there some > other way that I can test to see if a given object still exists? > > --- In flexcoders@yahoogroups.com <mailto:flexcoders% 40yahoogroups.com> > , "Matt Chotin" <mchotin@> wrote: > > > > There's no way to know if garbage collection was forced. Create a > > method does does a for loop that creates 10,000 objects into mid- > air. > > > > > > > > For (var i:int=0; I < 10000; i++) > > > > New Object(); > > > > > > > > That should trigger the garbage collector hopefully. > > > > > > > > ________________________________ > > > > From: flexcoders@yahoogroups.com <mailto:flexcoders% 40yahoogroups.com> > > [mailto:flexcoders@yahoogroups.com <mailto:flexcoders% 40yahoogroups.com> > ] On > > Behalf Of jeff tapper > > Sent: Thursday, July 27, 2006 5:56 AM > > To: flexcoders@yahoogroups.com <mailto:flexcoders% 40yahoogroups.com> > > Subject: [flexcoders] Re: Tools for listing objects > > > > > > > > Well, that experiment failed as well. 14 hours later, the same > > objects are still listed in the dictionary. > > Wed Jul 26 17:07:23 GMT-0400 2006 > > Testing56:Testing56 > > Testing19:Testing19 > > Testing38:Testing38 > > Thu Jul 27 08:50:31 GMT-0400 2006 > > Testing56:Testing56 > > Testing19:Testing19 > > Testing38:Testing38 > > > > Am I misunderstanding the usage of Weak References in the > > Dictionary? Does anyone have any idea how this can be used to keep > > track of what objects exist and which dont? > > > > --- In flexcoders@yahoogroups.com > <mailto:flexcoders%40yahoogroups.com> <mailto:flexcoders% > 40yahoogroups.com> > > , "jeff tapper" <jeff@> wrote: > > > > > > Ok, heres a sketch of what im trying now. > > > App.mxml > > > ==== > > > <?xml version="1.0" encoding="utf-8"?> > > > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml > <http://www.adobe.com/2006/mxml> > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml> > " > > > layout="vertical" creationComplete="initApp()"> > > > <mx:Script> > > > <![CDATA[ > > > import mx.managers.PopUpManager; > > > import mx.managers.PopUpManagerChildList; > > > import mx.core.IFlexDisplayObject; > > > private var screenDict:Dictionary; > > > private var scr1:IFlexDisplayObject; > > > private function initApp():void{ > > > screenDict = new Dictionary(true); > > > } > > > public function createScreen > > > (parent:DisplayObjectContainer, > > > screen:Class,modal:Boolean=false):IFlexDisplayObject{ > > > var s:IFlexDisplayObject = > > > PopUpManager.createPopUp(parent, screen, > > > modal,PopUpManagerChildList.APPLICATION); > > > screenDict[s] = s.name > > > return s; > > > } > > > public function showObjects():void{ > > > trace(new Date()); > > > for (var i:* in screenDict){ > > > trace(i+":"+screenDict[i]); > > > } > > > } > > > public function removeScreen > > > (screen:IFlexDisplayObject):void{ > > > PopUpManager.removePopUp(screen); > > > } > > > private function makeScreen():void{ > > > if(scr1 == null){ > > > scr1 = createScreen > > > (this,Testing,false); > > > } > > > } > > > private function destroyScreen():void{ > > > removeScreen(scr1); > > > scr1 = null; > > > } > > > > > > ]]> > > > </mx:Script> > > > <mx:Button click="makeScreen()" label="make"/> > > > <mx:Button click="destroyScreen()" label="kill"/> > > > <mx:Button click="showObjects()" label="show"/> > > > </mx:Application> > > > > > > Testing.mxml > > > ===== > > > <?xml version="1.0" encoding="utf-8"?> > > > <mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml > <http://www.adobe.com/2006/mxml> > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml> > " > width="400" > > > height="300"> > > > <mx:Button click="this.dispatchEvent(new Event('foo'))"/> > > > </mx:Panel> > > > > > > Now, as i run this, if i click make, kill, make, kill, show, The > > > trace shows: > > > Wed Jul 26 17:07:14 GMT-0400 2006 > > > Testing58:Testing58 > > > Testing20:Testing20 > > > Testing39:Testing39 > > > > > > Implying that the screens arent really being destroyed. Perhaps > I > > > didnt wait long enough, so 5 minutes later, I tried the same > > thing, > > > with the same results. Maybe 5 minutes isnt long enough, so I'll > > > leave it running over night and try again in the morning. But, > > the > > > fundemental question is, have i done enough to remove the > > screens? > > > Should the garbage collector clean the unused ones up, or have i > > > somehow left a reference lingering? > > > > > > We have a very complex app, which I want to ensure we clean up > all > > > unused objects, but im having trouble finding a way to verify > they > > > are removed. > > > > > > -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! 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