Squeak-dev May 1999

squeak-dev@lists.squeakfoundation.org

126 participants
289 discussions

Re: [ENH] Message / Symbol / Block compatibility
by Doug Way 26 May '99

26 May '99

Just wanted to say that this is pretty cool. Of the two methods described, I prefer the Trampoline object because it can handle messages with arguments succinctly. For example: | myNumbers | myNumbers := #(6 4 1 3). myNumbers select > 3. myNumbers select between: 2 and: 5. Now tell me that last one doesn't read like plain English! (okay, it's partly luck, but...) I noticed one minor downside to the Trampoline versus the other methods, which is that you can't pass messages to it which Object happens to understand, such as 'asString' (since the Trampoline uses #doesNotUnderstand:). I wonder if there's any way around that. Also, if this ever gets fleshed out and to the point that it might be considered as an addition to the base image, I'd probably go with just adding one of these methods... Smalltalk usually avoids having several very similar ways of doing the same thing. But it's good to have them all to play around with for awhile, though. :-) (Sorry, when I say "method" above I'm not referring to Smalltalk methods.) - Doug Way EAI/Transom Technogies, Ann Arbor, MI dway(a)eai.com, dway(a)mat.net http://www.transom.com On Sun, 23 May 1999, Marcel Weiher wrote: > > I've added methods for #value: and #value:value: to both Symbol and > Message to make them acceptable substitutes for blocks, especially in > the #do:,#collect: etc. iteration methods. > > To rehash an old example, you can now say > > (1 to: 20) select:#odd. > or > (1 to:20) select:(Message selector:#odd). > > both without any additions to the collection classes. The second > example using a message object can be expressed more succinctly using > some glue code and what I call a Trampoline (really a sort of higher > order message): > > (1 to: 20) select odd. > > #select returns the Trampoline object which captures the next message > and immediately bounces it to its source. > > The next step will be extending this to handle messages with arbitrary > numbers of variable arguments, such as > > 2 collect raisedTo:(1 to: 20) each. > or > (1 to:20) collect raisedTo:(1 to:20) each. > > something my previous, unpublished approach did. I feel that this new > approach should achieve the same effect much more simply. > > Marcel

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Re: "better" index to the mailing list archive?
by Dwight Hughes 26 May '99

26 May '99

Oops, I also just remembered the eGroup Squeak archive: http://www.egroups.com/group/squeak/info.html you can access the list by month or see the most recent messages at http://www.egroups.com/group/squeak/ This archive begins at the end of Nov '98. -- Dwight -------- Original Message -------- From: Dwight Hughes <dwighth(a)ipa.net> Subject: Re: "better" index to the mailing list archive? To: joda(a)interaccess.com CC: squeak(a)cs.uiuc.edu You can basically accomplish this now -- the current messages are at http://squeak.cs.uiuc.edu/mail/squeak/mail42.html right now. You can jump back and forth by editing the URL to mail2.html to mail42.html (page one is maillist.html). If you bookmark the "current" page, you can come back later and jump into things where you last left them and "next page" from there (or just make a guess at what the newest page will be - the list is running about 650-700 messages a month on average - which is how I found out mail42.html is the most recent page). -- Dwight joe davison wrote: > > Hi, > I no longer have time to subscribe to this mailing list, but > from time to time I like to drop by the archive to see how things > are progessing. > > I just tried it and find it difficult to deal with because I'm > presented with the oldest messages first and even the index only > presents 20-100 messages at a time, oldest first. I got tired > of hitting "next page" before I got beyond mid 1998. > > Perhaps some links that start in the list at least at the beginning of > each year (or month even) could be created to > ease getting to more recent messages? If not, could the date > index be switched to go from latest backwards? > > I probably won't see the replies, since I'm not subscribed, but > I'll check back periodically. (Hmmm, will it even post the message?) > > Thanks. > > joe davison

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"better" index to the mailing list archive?
by joe davison 26 May '99

26 May '99

Hi, I no longer have time to subscribe to this mailing list, but from time to time I like to drop by the archive to see how things are progessing. I just tried it and find it difficult to deal with because I'm presented with the oldest messages first and even the index only presents 20-100 messages at a time, oldest first. I got tired of hitting "next page" before I got beyond mid 1998. Perhaps some links that start in the list at least at the beginning of each year (or month even) could be created to ease getting to more recent messages? If not, could the date index be switched to go from latest backwards? I probably won't see the replies, since I'm not subscribed, but I'll check back periodically. (Hmmm, will it even post the message?) Thanks. joe davison

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Fw: Newbie Question: How to manage instances?
by Tim Cuthbertson 26 May '99

26 May '99

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Re: PWS Resource Utilization
by Carl Gundel 25 May '99

25 May '99

Someone suggested in the PWS mailing list to try using the v2.0 VM with my 2.2 image. I tried this and I got the performance back. I haven't tried to run PWS under Squeak 2.4. This might also fix performance. -Carl >When I start PWS, performance throughout the rest of my Squeak >environment takes a nose dive. Simple things like selecting a window >have a noticeable delay. I tried tweaking the secondsBetweenBackups := 1 >* (60 * 60) and the Delay forMilliseconds: 100 behaviors in the >loopOnPort:loggingTo: method but to no avail. Any suggestions? > >TIA, >Laurence > _______________________________________________________________ Get Free Email and Do More On The Web. Visit http://www.msn.com

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PWS Resource Utilization
by Laurence Rozier 25 May '99

25 May '99

When I start PWS, performance throughout the rest of my Squeak environment takes a nose dive. Simple things like selecting a window have a noticeable delay. I tried tweaking the secondsBetweenBackups := 1 * (60 * 60) and the Delay forMilliseconds: 100 behaviors in the loopOnPort:loggingTo: method but to no avail. Any suggestions? TIA, Laurence

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RE: Squeak Speaks
by Norton, Chris 25 May '99

25 May '99

Thanks Andreas! It worked like a charm (although I had to use Microsoft's browser to download it -- Netscape 3.02 had some problems with the file). ---==> Chris PS> This is super cool! It would be neat to have a preference that turned on "spoken" balloon help, "spoken" Scamper web pages, etc.... ;-) > -----Original Message----- > From: Raab, Andreas [SMTP:Andreas.Raab@disney.com] > Sent: Monday, May 24, 1999 5:29 PM > To: 'squeak(a)cs.uiuc.edu' > Subject: RE: Squeak Speaks > > I've put the DLL for Windows and the change set into > > http://isgwww.cs.uni-magdeburg.de/~raab/squeak/support/ > > Note that you'll need both files: > SpeechSynthesis.zip -- the change set > sqSpeech.dll -- the compiled primitives > > Andreas > -- > +===== Andreas Raab ========= (andreasr(a)wdi.disney.com) ==+ > | Walt Disney Imagineering Phone: +1 818 544 5016 I > I Glendale, CA Fax: +1 818 544 4544 I > +======< http://isgwww.cs.uni-magdeburg.de/~raab >========+ > > > > ---------- > > From: Norton, Chris > > Reply To: squeak(a)cs.uiuc.edu > > Sent: Monday, May 24, 1999 11:30 AM > > To: 'squeak(a)cs.uiuc.edu' > > Cc: recipient list not shown > > Subject: RE: Squeak Speaks > > > > I second Mark's request for the C-Compiler-Challenged... for Windows. > > > > Thanks in advance! > > > > ---==> Chris > > > > PS> Special thanks to Hans-Martin and to Luciano Notarfrancesco for > this > > great addition to Squeak! > > > > > -----Original Message----- > > > From: Mark Guzdial [SMTP:guzdial@cc.gatech.edu] > > > Subject: Re: Squeak Speaks > > > > > > >oops, sorry, typo in the http address. > > > >It's http://www.heeg.de/~hmm/squeak/SpeechSynthesis.zip > > > >(and it's 11 pm here, if that's an excuse for the typo) > > > > > > For us Mac-users who are C-Compiler-Challenged, does anybody have the > > > plugin compiled and available somewhere? > > > > > > Thanks! > > > Mark > > > > >

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Event triggers - new improved diet lite...
by Peter Smet 25 May '99

25 May '99

Here is the new version of publish-subscribe. It is identical to the previous version, with some methods removed, simplified or renamed. Some extraneous testing variables and methods have been taken out. In short - less fat, better for you :-) Is there a site I can upload this to - where, how? I am running it with no problems, but would like to hear of any bugs - particularly with Semaphore deadlocks, or failures in garbage collection.... Peter. Content-Type: application/octet-stream; name="Publish-Subscribe.23May1132pm.cs" Content-Disposition: attachment; filename="Publish-Subscribe.23May1132pm.cs" Attachment converted: Anon:Publish-Subscribe.23May1132pm.c (????/----) (0000A7C0)

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RE: Newbie Question: How to manage instances?
by Jarvis, Robert P. 25 May '99

25 May '99

>From: Tim Cuthbertson [SMTP:timcuth@bellsouth.net] >If I create an instance, e.g., > aTrack := Track new >and then create another instance, again using > aTrack := Track new >is there any way to get to the first instance, again? No. Once you no longer have a reference to an instance you can't get it back. What you need to do is ensure you've always got a valid reference, something like tracks := OrderedCollection new. aTrack := Track new. tracks add: track. This requirement to maintain references to instances is no different than in other languages. Consider the following example in C++: Track *pTrack; pTrack := new Track; pTrack := new Track; The code above 'loses' the memory allocated by the first 'new'. In the case of the C++ code the memory is permanently lost with no hope of being reclaimed, until the process making the allocation terminates. In the equivalent Smalltalk case, given in your initial message and quoted above, the 'lost' instance will be garbage collected automatically and the memory will eventually be available for reuse with no further action required on the part of the developer. >Suppose I created eleven instances of Track and then wanted to add them to an instance of Album, a subclass of Set. Even if I used >eleven different temp variables to hold references to each Track, I am now faced with a similar problem for my instances of Album. If I >don't retain the temp variable I used when I created it, I don't understand how to find it, again. You need to add your tracks to something which will maintain a reference to them, then maintain a reference to whatever it is that holds your tracks. Quite commonly your data model will be referenced by your user interface, which is referenced by the Smalltalk system, and thus things hang together. When I'm developing code I usually (but not always :-) write the data model first, exercising it from a workspace. Eventually I get tired of using the workspace to test the model and begin writing the user interface. This works well for me. I hope this helps. Bob Jarvis The Timken Company

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Send thread was not closed upon socket destroy
by Vandendriessche, Frederik 25 May '99

25 May '99

Hi Squeakers; I just started using the SMTPSocket. I succeed in sending myself an email, but I always get : "Send thread was not closed upon socket destroy" in the error box. How comes ? Is there an easy fix ? Thanks! Frederik Vandendriessche System Engineer, Electronic Business Services, * frederik.vandendriessche(a)eds.com * ..32/0 2 711 37 83 L ..32/0 2 711 39 47 ---------------------------------------- First they ignore you. Then they laugh at you. Than they fight you. Then you win. -- Gandhi ----------------------------------------

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