Squeak-dev May 2007

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150 participants
233 discussions

MS surface computer
by Bill Schwab 31 May '07

31 May '07

Check it out: http://money.cnn.com/2007/05/30/technology/microsoft.reut/index.htm?cnn=yes Sorry guys, couldn't resist. Imagine the lawsuits that MS will file now: "This is not a case of some accidental, unknowing infringement. There is an overwhelming number of flat surfaces supporting objects. Our strategy from everyone in the company has always been to license and not litigate as it relates to Office and Home furniture." Ok, back to work :) Bill Wilhelm K. Schwab, Ph.D. University of Florida Department of Anesthesiology PO Box 100254 Gainesville, FL 32610-0254 Email: bschwab(a)anest.ufl.edu Tel: (352) 846-1285 FAX: (352) 392-7029

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Re: [Solved] squeak and vista... primitive failed
by mmille10＠comcast.net 31 May '07

31 May '07

"IMHO, antiviruses is worser than viruses - they sit in your system and eat your memory/cpu resources and in 90% of cases unable to do anything when new virus intruding into your system. Living with antivirus each day is more pain than being infected with virus once in year." This is true of most antivirus software. I've been using AVG for antivirus on Windows, and it's nicer. On my machine it takes up about 2.3 MB of memory. I'm using the free version. I don't believe it prevents infection like other antivirus software does (though it may scan e-mail--I don't use this feature). This cuts down on the CPU usage, because it's not monitoring my files all the time. It has a scanner that you can run over your hard drive(s), which you can schedule, and it downloads updates automatically. That's it. Every few months it gives me a pop up saying it's "about to expire", and they try to get me to buy the commercial version, but when it does expire I can just download a new, updated free version. ---Mark mmille10(a)comcast.net

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JOB: GemStone/S QA Engineer
by James Foster 31 May '07

31 May '07

JOB SUMMARY This engineer will be part of the GemStone/S engineering team in Beaverton, Oregon, and will focus on product testing. Since most of the tests are automated, the work primarily involves writing and debugging Smalltalk code. PRODUCT AND TEAM GemStone/S was introduced at the first OOPSLA in 1986. Since then it has earned a reputation in the Smalltalk programming community as being the premier object database and application server. GemStone/S allows thousands of Smalltalk virtual machines on hundreds of hosts (with various operating systems) to share a single image (or database) with billions of objects taking up terabytes of space. The database provides full ACID capabilities (atomicity, consistency, isolation, and durability), has extensive indexing and large collection support, and includes a number of sophisticated garbage collection algorithms. The Smalltalk virtual machine has a JIT compiler on several platforms and supports a shared object cache effectively limited only by the amount of memory available in the machine. GemStone/S has an add-on product, Gem Builder for Smalltalk (GBS), which supports transparent object replication for VA Smalltalk and VisualWorks. Other add-on products provide an interface to Java and Oracle. GemStone recently announced support for Seaside (a Smalltalk web application framework) and availability of a 4 GB edition that is free--even for commercial use. The GemStone/S team consists of about 10-12 people. This group has a very low turnover and includes a number of senior-level engineers who have decades of experience in areas such as VM architecture, database internals, application development, and consulting. Team members regularly present at industry conferences such as Smalltalk Solutions and OOPSLA. ESSENTIAL JOB FUNCTIONS * Design and develop complex functional, performance, and scalability tests and test frameworks. * Run tests, analyze results, and work with other engineers to identify and resolve issues. * Be self-directed, assertive, and able to concurrently work on multiple tasks. * Have a commitment to software quality and performance. * Adhere to company coding guidelines. KNOWLEDGE, SKILLS, ABILITIES AND EDUCATION REQUIREMENTS * BS Computer Science or equivalent, including understanding of: o Database record/object locking, transactions, backup & restore; o Multi-user concurrency; o Multi-threaded applications; o Network communications; and o Software engineering principles and methodologies. * Moderate experience (e.g., 3+ years) in: o Developing large client/server database applications; o Testing, including performance and scalability testing; o Developing test frameworks and tools; and o Smalltalk and object-oriented programming. * Experience (e.g., 1+ years) in: o Unix/Linux shell programming; o Source code management tools; o C/C++ programming; and o Perl programming. CONTACT Send email to resume(a)gemstone.com and include 'Smalltalk QA' in the subject.

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A brief history of books.
by Daniel Lanovaz 30 May '07

30 May '07

A short animated history book with a Sophie-Croquet theme is here: http://web.mac.com/iphone2007/iWeb/Sophie-Croquet/Trailer%20HD.html It is best to have your surround-sound stereo system ready to rumble. Enjoy, Daniel ======================================================= I created the animation to tip my hat to all the people who spend their time, talents, and energy working on Squeak/Croquet/Sophie et al. Keep up the great work. The industry is at an exciting time where graphic arts, Hollywood special effects software, gaming engines, real-time ray tracing algorithms, and multi-core (parallel) hardware combine to bring some amazing advances to not only story-telling and education, but general purpose computing interfaces. This animation uses ray-tracing as the rendering technique, particle emitters and hypervoxels for the meteor, smoke, and sun flares, and an inverse-kinematics constraint system for David L.'s bone movement. Mesh weight maps are used to warp and curve both the character's mesh as well as the book's pages and stargate. I generated portions of this sequence for a trailer of an animation I will be showing at a fundraising event this October/2007 for Loma Prieta Elementary and Middle Schools in the Los Gatos mountains, California (to offset a reduction in state funding). David L. is a friend of mine and a Fellow at AMD/ATI working on the next generation multi-core cpu/gpu engines. I'm hoping for some interesting products from AMD/ATI over the coming years, as well as Intel and nVidia. It will be interesting to watch the software folks harnessing this multi-billion dollar investment in silicon and copper.

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MagritteGlorp
by Ramiro Diaz Trepat 30 May '07

30 May '07

Hello List, I am having a real weird problem with MagritteGlorp. When I execute: MyMagritteGlorpDescriptions createSchema. Which by the way I have successfully executed many times before, I get a walk back stating: "Error: Object is not in the collection". Looking a little bit inside, I can see that the descriptions of the attributes of one of my classes, do not match it's current status (contains attributes that no longer belong to the class). That is, for instance that when DatabaseTable>>fieldNamed: is called, the fields attribute (which is the offending collection) contains an attribute (in my case "Field(BOOK.detailUrl") which does not exist in the class anymore. Attribute detailUrl was removed long ago. So the collection of descriptions seem old, and do not seem to reflect the current descriptions expressed by my class methods #descriptionXxxxx Is there any cache or something like that that should be reseted?

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RE: [Solved] squeak and vista... primitive failed
by Andrew Tween 30 May '07

30 May '07

> And you didn't get a warning about Squeak not being able to open the > changes file? Usually this kind of problem is reported right upon startup.> Squeak starts up ok. It can read the changes file ok. It can write to the changes file ok. BUT, after writing to it, and at some delayed point in the future, NOD32 detects the file change and opens the changes file to scan it. If, while this scan is happening, another write to the changes file is attempted, then the error occurs. So the error is more likely to occur during a large file-in, than with a small one. Cheers, Andy _________________________________________________________________ Try Live.com - your fast, personalized homepage with all the things you care about in one place. http://www.live.com/getstarted

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there are still some summertalk projects looking for smart squeakers...
by stephane ducasse 30 May '07

30 May '07

http://www.esug.org/promotionactions/summertalk2007/ Stef

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RE: [ANN] ICal occurrence API
by J J 29 May '07

29 May '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 14:06:57 -0700 > >Yes. And others have said the same thing. One of the things I want to >check is your interpretation of iCal versus mine. And versus that of >others. My interpretation is actually from http://www.kanzaki.com/docs/ical/rrule.html. I made a test case for every example they have. This revealed (at least their interpretation of) how the various situations are interpreted. The sole rule that I did not honor was that they seem to start the frequency from the boundary of dtstart (e.g. DTSTART:2007-05-23 would start at 2007-01-01 for yearly frequency, 2007-05-01 for monthly, etc.) and simply drop all dates before dtstart in the set they return. What I do is make the first period a "rest of" period (e.g. in the above example my periods would be {Period start: 2007-05-23 end: 2007-12-31. Period start: 2008-01-01 end: 2008-12-31...} for yearly). There is only one test from that site that this difference shows up: they pick the 3rd in the set from MO, WE, FR (as I recall) and the dtstart starts on the Monday, but there have already been a Wednesday and Friday in the month before it. So the example picks the dtstart while I pick the Monday after. I haven't tried to comply with this yet because I am thinking it maybe a conflict that will cause the other tests to return the wrong date. >I'm sure you did. So did I. Chronos itself, and recurrence rules in >particular, have proved to be far more complex and challenging than I had >anticipated before I really got into them. The date/time functional domain >is not easy, not trivial, not simple, and cannot be adequately handled (let >alone comprehensively handled) with only a handful of classes and methods. >Collections and Streams are easy by comparison. Yea, that system is really impressive. You can probably get a P.H.D. in time now if you don't have one already. :) >I am intrigued by your approach using LazyLists. Since Chronos' recurrence >rules are implemented as executable syntax trees, it should be possible to >use them to emit ("compile") rules into your rule engine. > >--Alan Yea, the LazyLists are just a simple way to delay computation while still appearing as a (more or less) normal Smalltalk collection class. I wanted to handle the fact that any unbounded (i.e. no COUNT or UNTIL clause) set was infinite, while also handling the fact that the common use case is going to only want a small section of the dates (e.g. the most common will probably be calendar GUI's printing the current month). The engine currently makes all it's decisions based on the instVars of it's frequency class, but I welcome any ideas you have for integration if you think you can use my work. _________________________________________________________________ Make every IM count. Download Messenger and join the im Initiative now. Its free. http://im.live.com/messenger/im/home/?source=TAGHM_MAY07

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RE: squeak and vista... primitive failed
by Andrew Tween 29 May '07

29 May '07

Hi, > Date: Tue, 29 May 2007 18:33:58 +0200> From: cbeler(a)enit.fr> To: squeak-dev(a)lists.squeakfoundation.org> Subject: squeak and vista... primitive failed> > Hi all...> > I just installed vista (32bits) on my computer.> Squeak seems to work fine exept when I filein a file (like > MCRepositories.st). The primitive that return the size of a file fail...> > StandardFileStream>>primSize: id> "Answer the size of this file."> > <primitive: 'primitiveFileSize' module: 'FilePlugin'>> self primitiveFailed> > Any advices are welcommed ;) I had the same problem when running Squeak on Vista. It turned out that it was due to NOD32 anti-virus checking the changes file when it was written to. Disabling the .CHANGES extension in NOD32 fixed the problem, and now Squeak runs fine. Cheers, Andy > > Thanks> > Cédrick> _________________________________________________________________ Try Live.com - your fast, personalized homepage with all the things you care about in one place. http://www.live.com/getstarted

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squeak and vista... primitive failed
by Cédrick Béler 29 May '07

29 May '07

Hi all... I just installed vista (32bits) on my computer. Squeak seems to work fine exept when I filein a file (like MCRepositories.st). The primitive that return the size of a file fail... StandardFileStream>>primSize: id "Answer the size of this file." <primitive: 'primitiveFileSize' module: 'FilePlugin'> self primitiveFailed Any advices are welcommed ;) Thanks Cédrick

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