Squeak-dev November 2007

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142 participants
155 discussions

Smalltalk and Java
by Torsten Bergmann 13 Nov '07

13 Nov '07

Alexandre wrote: >What do you mean with "how to implement/satisfy a java interface on >the smalltalk side" ? >You can interact with any classes in Athena. No need to implement >something on the Java side. see http://www.mozilla.org/rhino/ScriptingJava.html especially the sections starting at "Implementing Java interfaces" I want to implement a Java interface on the Athena/Smalltalk side and hand the Smalltalk instance over to Java. Think of implementing the interface Runnable in Smalltalk ro run a Thread in Java. Bye Torsten -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger

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Smalltalk and Java
by Torsten Bergmann 13 Nov '07

13 Nov '07

Hi Alexandre, >You scored My first impression from the website was to keep the image and interpreter (and therefore the JAR) as small as possible. That's why I wondered about the .svn stuff. But after digging deeper it looks this is done in a later release ;) However, I'm currently playing with the Rhino JavaScript engine and are curious about similar dynamic functionality with Athena. Do you have a sample how to implement/satisfy a java interface on the smalltalk side? Can you tell us a little bit more about "cross" exception handling. I know performance is currently not high priority but did you run some benchmarks? Bye Torsten BTW: The link to http://bergel.eu/athena/?Documentation:First_contact on the "Documentation" page leads to a 404 error. -- GMX FreeMail: 1 GB Postfach, 5 E-Mail-Adressen, 10 Free SMS. Alle Infos und kostenlose Anmeldung: http://www.gmx.net/de/go/freemail

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Give One. Get One. Now!!
by Ron Teitelbaum 13 Nov '07

13 Nov '07

Hi All, This is just a reminder that you can now help the OLPC project by purchasing XO laptop's. You will give one to a child in the developing world and get one for yourself. The Give One. Get One. program is only available for a limited time so don't delay. http://news.squeak.org/2007/11/13/give-one-get-one-now/ Or go directly to: http://www.laptopgiving.org/en/index.php Check out a cool review: http://news.squeak.org/2007/10/05/pretty-cool-nytimes-olpc-review/ Thanks, Ron Teitelbaum

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Duration class>>#readFrom: is SURPRISING [was EndOfStream performance cost]
by nicolas cellier 12 Nov '07

12 Nov '07

While chasing stream pastEnd readers, I ran all 7141 tests and got only 340 pastEnd reads, and still no failure (except known ones in this image), no image crash, not the smell of a bug yet (I know, test coverage is quite thin...). However, seeing Duration class>>#readFrom: among pastEnd readers, i inquired implementation and soon noticed a surprising result: http://bugs.squeak.org/view.php?id=6764 Reading pastEnd and testing isNil is absolutely legitimate here, I do not propose to change it per se. But I would like this readFrom: behaviour changed, wouldn't you? At least hope my EndOfStream inquiry won't be totally useless... Cheers

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comeToFront
by Trygve Reenskaug 12 Nov '07

12 Nov '07

Squeak3.10beta.7143 I have a DemoWindow, sco PasteUpMorph. The DemoWindow opens on top. I open a Browser, it masks part of the DemoWindow. I click the DemoWindow , but have to move it to make it go on top. The browser doesn't go on top if I click inside it, I have to click its border (move it). I set the demo window option "resist being picked up". It is now hard to make the demo window go on top, so I add the following method: DemoWindow >>mouseDown: evt evt yellowButtonPressed ifTrue: [^ self yellowButtonActivity: evt shiftPressed]. self eventHandler ifNotNil: [self eventHandler mouseDown: evt fromMorph: self]. self comeToFront. Now the DemoWindow goes on top when I click it (as it should). But the only way to make the Browser go on top is to click its border (move it). I have also tried /'evt hand newKeyboardFocus: self.'/ with the same result. /'self activate'/ doesn't work on a Morph (but it works on a SystemWindow) What's happening? Cheers --Trygve PS I have looked at the excellent documentation in '/Squeak by Example/' and '/A GUIDE TO WORK WITH SQUEAK MORPH CLASSES/', and '/An Introduction to Morphic: The Squeak User Interface Framework/' without finding an answer. I have also tried to google, but have not found anything written by people who knew what was happening. -- Trygve Reenskaug mailto: trygver(a)ifi.uio.no Morgedalsvn. 5A http://folk.uio.no/trygver N-0378 Oslo Tel: (+47) 22 49 57 27 Norway

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Smalltalk and Java
by Torsten Bergmann 12 Nov '07

12 Nov '07

Hi Alexandre, would be smaller if you remove the ".svn" (subversion) meta folders from the jar. Bye Torsten -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger

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Smalltalk and Java
by Torsten Bergmann 12 Nov '07

12 Nov '07

Back in 1999 Claus Gittinger from exept.de added Java support to their Smalltalk/X system. They were able to run Java and Smalltalk on the same VM using the unmodified JDK packages. Very interesting since they could debug Java within the Smalltalk/X debugger, inspect Java objects in Smalltalk inspectors or run applets within ST/X windows and the UI Builder. Remember: it was 1999 where most Java guys were used to vi/emacs environments for development. See http://www.old.netobjectdays.org/pdf/99/stja/ClausGittinger.pdf for a (german) description of the system. Bye Torsten -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser

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The Weekly Squeak Summary No. 15: Sep 23 - Nov 10, 2007
by Michael Haupt 12 Nov '07

12 Nov '07

Dear Squeakers, welcome to the The WeeklySqueakSummary, an irregular traffic-dependent report on what's going on in the world of Squeak based on the WeeklySqueak blog. Highlights of the past weeks: Pretty much has been going on in terms of Seaside recently. Not only is version 2.8 officially released [17] in conjunction with a download that gives you a Seaside server out of the box [23], but there is also an up-to-date tutorial on Seaside 2.8 that gives you an easy quick start [12]. OLPC mass production has finally begun [20], and a major German news TV show has finally discovered the project's existence [11]. The New York Times has a very enthusiastic review of the XO [5]. Lively [6] is the result of Dan Ingalls' work at Sun - and it is impressive: Morphic, implemented in JavaScript, running in your browser. Check it out. The past weeks' news items: [1] How to build a wiki in 98 lines of code http://news.squeak.org/2007/09/27/how-to-build-a-wiki-in-98-lines-of-code/ [2] Don't Miss Cincom's Seaside Podcasts Next Week http://news.squeak.org/2007/09/30/dont-miss-cincoms-seaside-podcasts-next-w… [3] Are you ready for this? Croquet on an Inteactive White Board http://news.squeak.org/2007/10/04/are-you-ready-for-this-croquet-on-an-inte… [4] Tangible User Interface for Squeak http://news.squeak.org/2007/10/05/tangible-user-interface-for-squeak/ [5] Pretty Cool NYTimes OLPC Review http://news.squeak.org/2007/10/05/pretty-cool-nytimes-olpc-review/ [6] Dan's the Man! Check out Dan Ingalls work. Squeak in JavaScript. http://news.squeak.org/2007/10/05/dans-the-man-check-out-dan-ingalls-work-s… [7] Conference round-up http://news.squeak.org/2007/10/10/conference-round-up/ [8] Seaside being used with Answers.com http://news.squeak.org/2007/10/10/seaside-being-used-with-answerscom/ [9] Smalltalk to the rescue? Microsoft EX-execs sue Red Hat http://news.squeak.org/2007/10/12/smalltalk-to-the-rescue-microsoft-ex-exec… [10] Preview of new Seaside Visual Interface Builder http://news.squeak.org/2007/10/16/preview-of-new-seaside-visual-interface-b… [11] See Bert and OLPC on German TV (in German) http://news.squeak.org/2007/10/17/see-bert-and-olpc-on-german-tv-in-german/ [12] New Seaside Tutorial By Hasso-Plattner-Institute http://news.squeak.org/2007/10/19/new-seaside-tutorial-by-hasso-plattner-in… [13] Capturing Debug http://news.squeak.org/2007/10/20/capturing-debug/ [14] Squeak BOF at OOPSLA - highlights + videos http://news.squeak.org/2007/10/24/squeak-bof-at-oopsla-highlights/ [15] Recess!! Learning at play. http://news.squeak.org/2007/10/26/recess-learning-at-play/ [16] Wait for it! - The Little Book of Semaphores http://news.squeak.org/2007/10/26/wait-for-it-the-little-book-of-semaphores/ [17] Seaside 2.8 Released!! http://news.squeak.org/2007/10/28/seaside-28-released/ [18] Nepal's Open Learning Exchange Announces First Learning Activity (It's Squeak!) http://news.squeak.org/2007/10/30/nepals-open-learning-exchange-announces-f… [19] Take cover we are being INVADED!! http://news.squeak.org/2007/11/02/take-cover-we-are-being-invaded/ [20] OLPC Moves into Mass Production http://news.squeak.org/2007/11/06/olpc-moves-into-mass-production/ [21] Who you gonna Call? - The Net Neutrality Squad! http://news.squeak.org/2007/11/08/who-you-gonna-call-the-net-neutrality-squ… [22] Athena Smalltalk for embedded applications http://news.squeak.org/2007/11/09/athena-smalltalk-for-embedded-application… [23] Seaside - One Click Experience! http://news.squeak.org/2007/11/10/seaside-one-click-experience/ You can find this and much more on The WeeklySqueak blog, the newsblog dedicated to the world of Squeak:http://news.squeak.org/ Subscribe to the WeeklySqueak RSS feed: http://news.squeak.org/feed/ Happy squeaking, Michael

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Smalltalk and Java
by Bergel, Alexandre 12 Nov '07

12 Nov '07

Dear Squeaker, I am working on a new Smalltalk intended to be embedded in Java programs. Athena is an offspring of Smallworld. You can embed Ruby, Python, Lua, Scheme in Java. You can achieve similar goals with Athena. http://bergel.eu/athena Comments will be welcomed... cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Re: Asscociation equality (was: Re: When are 2 CompiledMethods = [incl: Float>>nan])
by Marcus Denker 11 Nov '07

11 Nov '07

On 12.09.2007, at 23:04, stephane ducasse wrote: > > > Begin forwarded message: > >> From: Andreas Raab <andreas.raab(a)gmx.de> >> Date: 11 septembre 2007 07:36:56 HAEC >> To: The general-purpose Squeak developers list <squeak-dev(a)lists.squeakfoundation.org >> > >> Cc: "The New Compiler, AST, IRBuilder, Closures..." <newcompiler(a)lists.squeakfoundation.org >> > >> Subject: Asscociation equality (was: Re: When are 2 CompiledMethods >> = [incl: Float>>nan]) >> Reply-To: The general-purpose Squeak developers list <squeak-dev(a)lists.squeakfoundation.org >> > >> >> Klaus D. Witzel wrote: >>> on Sun, 09 Sep 2007 11:26:58 +0200, you wrote: >>>> Revert Association>>= to what it used to be and everything will >>>> be fine (Association>>= is really, really badly broken; it causes >>>> problems all over the places and this is one of them). >>> That's a very, very good one, thanks for reminding us of that open >>> issue. >>> Since the compiler machinery (BytecodeGenerator) already uses >>> #literalEqual: and I want Decompiler to use the same comparision >>> for literals, it'll be easy to put #literalEqual: into Association >>> without touching its current #= implementation. In a later step >>> it's perhaps possible to really, really revert #= in Association. >> >> I only wish I knew *why* this got changed in the first place. Both, >> #hash and #= have Marcus' initials on it - can someone perhaps ask >> him why that change was needed or desirable? I'm afraid there may >> be some non-obvious users of that change but since I can't track >> down exactly where this happened I really don't know where to even >> start looking. >> >> This change came from the time when I played with AOStA. I ported it from VisualWorks, and it uses actually association as keys in Dictionaries somewhere. (That took a while to find why that did not work....). So I changed it in my development image. Then I thought that this is stange, to have (1->2) to be equal to (1- >7) and submitted the changeset to the BFAV bag then. It was reviewed (not by me), and added (not by me) and is in the image since 3.7 or 3.8. And in VisualWorks this is really defined like this: (1->2) = (1->3) --> false = anAssociation "Answer whether the receiver is equal to the argument." ^super = anAssociation and: [self value = anAssociation value] So I am at leat not completely alone with having thought that this is the way it should be. Marcus

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