Squeak-dev December 2007

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129 participants
144 discussions

RE: [ANN] ICal occurrence API
by J J 30 Dec '07

30 Dec '07

>From: "Alan Lovejoy" <squeak-dev.sourcery(a)forum-mail.net> >Reply-To: The general-purpose Squeak developers >list<squeak-dev(a)lists.squeakfoundation.org> >To: "'The general-purpose Squeak developers >list'"<squeak-dev(a)lists.squeakfoundation.org> >Subject: RE: [ANN] ICal occurrence API >Date: Mon, 28 May 2007 12:54:48 -0700 > >I fully intend to have a look at your code--after I've completed my >implementation. However, I don't plan on implementing a parser for >iCal--the only goal is to be able to specify/represent (and fully and >correctly implement) the iCal rule model. I didn't either. The iCalendar package made by Philippe does all that, it just didn't do anything with the recurrence rules once made. > Actually, the Chronos recurrence >rule model goes beyond what can be specified using the iCal rule >model/notation. Using an algebra enables support for logical negation and >disjunction, among other things (consider what Chalten does with its >TimeLineFilter, for example.) That sounds cool. I went for the Recurrence rule standard which is ugly, ambiguous and, though my test coverage didn't point anything out, I think even self-contradicting. I don't know anything about recurrence rule algebra but it sounds good. :) >I'm also working on full support for business date arithmetic. I intend to >meet or exceed the capabilities offered by jFin >(http://jfin.org/date_adjustment) or ObjectLab >(http://objectlabkit.sourceforge.net/), and to use the data provided by >FinancialCalendar.com (http://financialcalendar.com/). Very cool. >As for "thunder stealing," that goes with the territory when two or more >projects are in the same functional domain. My goal is to implement the >world's best date/time library in any language--and I've been working hard >at it since October 2004. I feel I've already achieved parity with >anything >else out there. Now it's time to go to the next level. I wasn't mad or anything. Just joking because of the timing of it. :) But yes, now that you point it out, it would make more sense that the recurrence calculation code be with a time library, whether you use anything of mine or not. I learned a lot in the doing. >But, since my main motivation for making Chronos the best date/time library >in the world is to help promote Smalltalk, I actually welcome any and all >contributions by others to that goal. And based on the description, your >iCal engine certainly seems to be a worthy contribution. Thanks. I don't know how much of my stuff will be usable for you. I got the approach from Haskell. Basically the strategy is that the frequency creates an infinite list of "periods" which are the same thing as a TimeSpan but with a different interface. All constraints (e.g. BYDAY) are applied to the period stream they get, and they generate the next period stream from it. Once you get through all the constraints you should have the dates. >Working together, we can leave Smalltalk's competition in the dust. And >inspire those working on Smalltalk projects in domains other than >dates/times to do the same. > >Go Smalltalk! > >--Alan That is what I want as well. :) _________________________________________________________________ PC Magazines 2007 editors choice for best Web mailaward-winning Windows Live Hotmail. http://imagine-windowslive.com/hotmail/?locale=en-us&ocid=TXT_TAGHM_migrati…

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Squeak VM stability?
by Michael van der Gulik 29 Dec '07

29 Dec '07

Hi all. Is the policy of the VM makers (whoever they currently are) to prevent the VM from crashing, particularly when given malicious bytecodes? This is a general question, mostly related to http://bugs.squeak.org/view.php?id=1395 which is now closed. Is it considered a bug if I can crash the VM with a maliciously crafted method? Which direction would the Squeak community want to go in? Should we aim to have a VM that would never seg fault and dump core (or blue screen under Windows), regardless of what rubbish is fed to it? Doing extra sanity checks and bounds checking would possibly have a performance penalty. Regards, Gulik. -- http://people.squeakfoundation.org/person/mikevdg http://gulik.pbwiki.com/

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SqueakSource is down again
by Rob Withers 29 Dec '07

29 Dec '07

This seems to be happening a lot. Is there something that can be done to alleviate the problem? thanks, Rob

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Documentation Suggestion
by Robert Hawley 29 Dec '07

29 Dec '07

Documentation Suggestion. Can we have direct links from within the Squeak image from each class, method, project, category, package, (etc.,) into a user-editable documentation web-site? It would effectively be Squeak's own encyclopedia; similar to wikipedia. Structured documentation could be available with great immediacy, be developed incrementally and be subject to continual review and rewrite by the whole community. If there is existing discussion on this idea then it would be useful to have pointers to it. If it has not been much discussed before then I would suggest that this is a possibility worth exploring. Yours Bob

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Documentation Suggestion
by Robert Hawley 29 Dec '07

29 Dec '07

Hi I am not sure if my suggestion was made very clear - I was not thinking of google searches when suggesting this. The suggestion proposes a simple route for the community to be able to write better documentation and explanations. I envisage a web-site pf pages of which can be reached via a simple contextual click or menu selection from with the Squeak image. The pages would be editable (like wikipedia) and would have scope to provide much better explanations than the comments found in the image. Method and class comments are generally very primitively written and do not hyperlink to better explanations - comments in the image are bound to the 'approved' code, are too inflexible, vary in stye and utility, and cannot easily and globally be improved. A web-site would give much more flexibility for improving the documentation. A structured web-site could do more than just reflect the components in the image - it could also serve as a place where higher-level explanations and commentary can be also be provided. As such, the repository I am suggesting would make the whole of Squeak much more accessible. Yours Bob _______________________ > Damien Pollet damien.pollet at gmail.com Thu Dec 27 15:03:01 UTC 2007 Previous message: Documentation Suggestion Next message: Documentation Suggestion Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] I have been thinking of doing that, at least to get google to index smalltalk code, so that people can see what that looks like without loading an image first. As far as structured documentation is concerned, you already have that from within smalltalk, when there are class or method comments. There is already code in Pier to export comments as LaTeX or HTML code, I think that's what Lukas used to generate part of his thesis. SqueakSource has a code browser but it's not bookmarkable and I don't think it's indexed by search engines. On 27/12/2007, Robert Hawley <rhawley at plymouth.ac.uk> wrote: > Documentation Suggestion. > > Can we have direct links from within the Squeak image from each class, method, project, category, package, (etc.,) into a user-editable documentation web-site? It would effectively be Squeak's own encyclopedia; similar to wikipedia. Structured documentation could be available with great immediacy, be developed incrementally and be subject to continual review and rewrite by the whole community. > > If there is existing discussion on this idea then it would be useful to have pointers to it. If it has not been much discussed before then I would suggest that this is a possibility worth exploring. > > Yours > > Bob > > -- Damien Pollet type less, do more [ | ] http://typo.cdlm.fasmz.org .

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greetings from seasons past
by Craig Latta 28 Dec '07

28 Dec '07

As I was walking through the PARC lobby recently, a familiar sight caught my eye. A slideshow on a large monitor was showing pictures of the Alto and Smalltalk from 1979... of course I had to get hold of them. :) With many thanks to Mimi Gardner at PARC (I hope she doesn't mind me mentioning her), here they are: http://www.movedigital.com/go/netjam/103640/alto.zip Here's to many more fun seasons of hacking and learning! -C -- Craig Latta improvisational musical informaticist www.netjam.org Smalltalkers do: [:it | All with: Class, (And love: it)]

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Relicense on Squeak 3.10
by Hilaire Fernandes 28 Dec '07

28 Dec '07

I have slightly modified the Andrew Black analyzer for 3.10 image. http://wiki.squeak.org/squeak/6016 The methods list is therefore different from the previous one provided from another image (I get no feedback when asking from which image it was extracted). Starting from 3.10 may be a wiser choice for future. From this list there are unknown contributors. As a next step I am proposing to filter out the unknown contributors and the contributors with code size <=25 as the FSF is suggesting. BTW, where should I look to be able to calculate the number of lines of a given method? Hilaire

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OSProcessPlugin and AioPlugin for OS-X
by John M McIntosh 27 Dec '07

27 Dec '07

I've build a new OSProcessPlugin (4.2.4) http://wiki.squeak.org/squeak/3349 and a newly generated AioPlugin V2.2 http://wiki.squeak.org/squeak/3384 for testing purposes. If someone can test them on os-x 10.3, 10.4 on macintel and powerpc, that would be helpful. This means the CommandShell Sunits now mostly run (1 failure) on the macintosh carbon based VM, well at least on os-x 10.5.1 on macintel. Please note not all of the OSProcess tests will run, some cause the VM to crash when they attempt to fork the VM since forking the carbon based VM is not allowable. Corrupts memory and crashes really fast. -- = = = ======================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================

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respondsTo: bug
by Doug Edmunds 27 Dec '07

27 Dec '07

Squeak 3.9 #7067 I happened to be comparing Squeak to Dolphin CE, and ran across this bug in Squeak relating to respondsTo: (3 @ 4) respondsTo: #<=. "Squeak reports this as false" However: (3 @ 4) <= (10 @ 15). "true" (3 @ 4) <= (1 @ 15). "false" Trying other methods for Point, I get many similar 'false' results when sending 'respondsTo:' to Point (but I also get many correct results). ie. Point respondsTo: #abs. "false" however, Point respondsTo: #hash. "true" Point respondsTo: #storeOn:. true Point respondsTo: #x. false but (3 @ 4) x. "3" Point respondsTo: #y. false but (3 @ 4) y. "4" There does not seem to be any pattern to when respondsTo: works correctly and when it doesn't. -- dae

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EventSensor /inputSemaphore
by Igor Stasenko 26 Dec '07

26 Dec '07

I'm curious, in new EventSensor , which is replacement of InputSensor , there are ivar, called inputSemaphore , which should indicate that there are events waiting to be handled. But there is no code except initialization/shutdown, where it's really used. Also, windows platform sources storing inputsensor index only to check that image is using new (EventSensor) framework for working with input events, but there is no code which signals it. Is that was introduced only to indicate how VM should behave (using old or new event handling mechanisms)? But then, why it's a semaphore, a simple flag is enough for that. -- Best regards, Igor Stasenko AKA sig.

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