Squeak-dev March 1999

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153 participants
338 discussions

Re: entao
by Tim Rowledge 03 Mar '99

03 Mar '99

It might help matters slightly if the swiki could a) alert the writer of a question when their page is modified (hopefully signalling an answer!). Some way to tag the email address would be needed. b) email the list when a new question is added, so that those of us with a compulsive need to answer questions can get a fix... tim -- Useful random insult:- Enjoys listening to telemarketers. Tim Rowledge: rowledge(a)interval.com (w) +1 (650) 842-6110 (w) tim(a)sumeru.stanford.edu (h) <http://sumeru.stanford.edu/tim>

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WeakKeyDictionary - does this code look right??
by Peter Smet 03 Mar '99

03 Mar '99

I am trying to do a (very rough) version of event triggering using a PostOffice class via which all events are relayed. Objects register an interest in an event by sending the following message to the PostOffice: when: anEvent do: aOneArgBlock for: anObject The PostOffice should hold onto the all the objects it needs to notify weakly, so that these can be garbage collected. I am using a WeakKeyDictionary, in which the keys are the objects wanting to be notified, and the values are action blocks. I realise the blocks idea is a problem, since blocks may have strong references to objects, but this is an issue for later... Anyway, when I test the idea, the objects in the WeakKey Dictionary never seem to get garbage collected, even if there are no references to them (from the blocks, inspectors etc.) The WeakKeyDictionary is held by the Singleton instance of PostOffice. This is despite waiting, shutting down and starting the image etc. What am I doing wrong? I am puzzled by the class comment in WeakKeyDictionary which states: "Clients are responsible to register my instances by WeakArray such that the appropriate actions can be taken upon loss of any keys." Does this mean each WeakKeyDictionary must be contained within a WeakArray?? I would appreciate an example of how this should be done. Here are the relevant messages from the PostOffice class: initialize events _ Dictionary new. self events at: #allEvents put: WeakKeyDictionary new when: anEvent do: aOneArgBlock for: anObject (self events includesKey: anEvent) ifFalse: [self events at: anEvent put: WeakKeyDictionary new]. (self events at: anEvent) at: anObject put: aOneArgBlock incoming: aMessage (self events at: #allEvents) do: [:block | block value: aMessage]. (self events includesKey: aMessage selector) ifFalse: [^ self]. (self events at: aMessage selector) do: [:block | block value: aMessage]

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re: exception handling for Squeak available
by R. A. Harmon 03 Mar '99

03 Mar '99

At 12:35 AM 3/3/99 -0800, you wrote: [snip] > I'll mark my exception handling framework (http://www.netjam.org/self/projects/smalltalk/exceptionHandling.html), as version one final on Monday, unless I hear about bugs before then. There have been 30 hits so far, but I haven't heard any feedback yet. [snip] Looks like a first class piece of work to me. I'm in the process of trying to relate your instance-based approach to ANSI's class-based. Very nicely done. Thanks a bunch. -- Richard A. Harmon "The only good zombie is a dead zombie" harmonra(a)webname.com E. G. McCarthy

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Re: entao
by Bert Freudenberg 03 Mar '99

03 Mar '99

On Tue, 2 Mar 1999, David Farber wrote: > question: > i'm running squeak 2.3 on NT. i wanted to pull up couple of change sets in > the Package Browser. this worked fine for the change set that hadn't had its > crs mutated to crlfs, but really didn't work for the other change set that > had crlfs. filing in CrLfFileStream didn't help, although i don't know that > i have the latest version of the CrLfFileStream change set. anyone got any > pointers? You also have to change FileStream class>>#concreteStream to return CrLfFileStream (as the comment there suggests). > question: > why doesn't restore display work when i am in a morphic project? if i resize > the window and then select restore display in the mvc world, it works fine, > but not in morphic. It's a bug (the World's viewbox isn't updated). A fix was sent a few days ago (see http://squeak.cs.uiuc.edu/mail/squeak/msg06162.html) > thoughts: > i'm certain i've seen both of these questions discussed if not answered on > the squeak list. the problem is that so much info flows through the list > that it takes quite a bit of time to find even messages that i've posted, > much less information that i only vaguely recall seeing. obviously, this is > where the swiki pages would be ideal--they are the perfect place for > information to accumulate. unfortunately (and this is just my impression, i > could be off here) it seems to me that the swiki pages aren't really living > up to their potential. i think the problem is very much a social one; the > technology is there, but it really hasn't been integrated into our > community. is anyone else feeling the same way? any ideas or thoughts on how > we might change this? We might set up a special mailing list archive that collects the properly marked fixes (with a [FIX] in subject) ... /bert -- Bert Freudenberg Department of Simulation and mailto:bert@isg.cs.uni-magdeburg.de Computer Graphics http://isgwww.cs.uni-magdeburg.de/isg/bert.html Univ. of Magdeburg

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Re: entao
by Andrew C. Greenberg 03 Mar '99

03 Mar '99

> A while ago I suggested that there should be a rule that the person who > asks the question changes the swiki. While this has its good points, it is > better for short question and answers, rather then long discussions. The downside of this, of course, is that the best questions tend to be asked by newbies who have not yet become full-fledged members of the community. I was surprised and pleased to find a number of my questions and answers posted to the Swiki, only later to suppose that I should have presumed to do that myself. Expecting newbies to do this is naive. > An > alternate rule, that the person who posts updates the swiki, also has its > good points, but would mean that those altruistic and knowledgable people > who give their time and expertise to answering questions from the rest of > us are made to do further work for our benefit :-( Right. I noted that guys like Ralph Johnson and Ted K. were regularly picking up the slack, posting stuff that struck their interest as those questions were answered. We could hope that someone would volunteer to monitor the e-mails in this fairly active listServ and post to Swiki for us. . . Anyone with time on their hands?

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Re: It's REALLY heating up out there...
by ohshima＠is.titech.ac.jp 02 Mar '99

02 Mar '99

Tim Rowledge wrote: > Mind you, the integer performance sounds oddly low given the other figures, > which might damage the Sq performance. The numbers are shown in GIPS. So it just doesn't make sense comparing different architectures in GIPS. Or they just allocated as many transistors for floating units as possible? (Do campany use disadvantageous measure to advertise their product?) > When I worked at PPS, I > tried to get someone to take seriously the rise of the games machines and > allow work on a nintendo port. I might have got the brand wrong, but I > still think the idea was right. I even included Nintendo in the list of > ports on the sweatshirts I made for a bunch of people at PPS :-) "Nintendo" means the old (red & white colored) one? I think its CPU is a 6502 variant. How fast an Smalltalk system would run on the machine? Ranjan Bagchi wrote: > The new Sega dreamcase machine's running Windows CE, right? Yes. It's a variant of WinCE. I don't know how the development tool looks like, but they say it becomes much easier to develop a software for DC. ("Dreamcast" is the name) The press release says that the development tool for the next PS is running on Linux. Sony knows how to do the business:-) (In fact, the compiler for current PS is gcc). OHSHIMA Yoshiki Dept. of Mathematical and Computing Sciences Tokyo Institute of Technology

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Re: Anyone making end-user programs with Squeak?
by Bruce O'Neel 02 Mar '99

02 Mar '99

Hi, I'm working on an website based on PWS where squeak is a huge help. cheers bruce >On the Rhapsody talk list there was a question asking if anyone had made any >end-user or commercial products using Squeak or its technology. Or any >non-academic uses at all. > >Good question. > >Are there? > >I'd love to hear. > >Thanks > >Adam Bridge > >

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Re: Size of changes file
by Bruce O'Neel 02 Mar '99

02 Mar '99

>At 10:07 AM 3/1/99 -0800, you wrote: > > aStream := FileStream >readOnlyFileNamed:'http://www.smalltalk.org/stuff.html'. > >Having both network API's and File API's is redundant. For that matter, the >OS should just cope with url style filnames. You have exactly the same >kinds of possible errors as when accessing a file on a normal file server. I've done this for another package (read/writes FITS file, an astronomy format) and it's quite interesting the posibilities this opened up. cheers bruce

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Some assistance with uploading, continued
by Vandendriessche, Frederik 02 Mar '99

02 Mar '99

I found a work around for my problem: 3097829181 localhost nil /uploadTest.1.upload nil *** an UploadURLmap: Message not understood: listOfAttachments After browsing some more code I noticed that the method listOfAttachments is not a UploadUrlmap method,\ though an UploadSwikiAction method. So : I replaced <?request map listOfAttachments?> with <?request map action listOfAttachments?> in upload.html And it works.... I you see any disadvantages, or you have a better solution : let me know... Greetings Frederik Vandendriessche System Engineer, Electronic Business Services, frederik.vandendriessche(a)eds.com phone ..32/0 2 711 37 83 fax ..32/0 2 711 39 47

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Re: [BUG] selecting changes in the "recent changes" browser
by SWallace 02 Mar '99

02 Mar '99

At 5:40 PM -0800 3/1/99, Craig Latta wrote: > > In a "recent changes" browser, one cannot select multiple changes. It looks like this bug (which occurs only in the mvc environment) got introduced on the eve of 2.3-final as a concomitant of last-minute changes that made multiple-selection finally work in changelist browsers in the morphic environment. A fix will go out in the next batch of updates. Thanks for pointing this one out, Craig, At disney we're using the morphic development environment almost exclusively these days, so we're not beating on the mvc tools very much. -- Scott

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