February 2011 - Pharo-users

Pharo-Project mailing list digest
by Francois Stephany Feb. 18, 2011

Feb. 18, 2011

Hi, If you don't follow the Pharo-Project mailing list because of its high traffic, you are maybe interested in a digest of the past week. You can find one here: http://articles.tulipemoutarde.be/pharo-mailing-list-weekly-digest Please tell me if you have any remarks/demands/critics :) See you next week, Francois

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polymorph question
by Werner Kassens Feb. 18, 2011

Feb. 18, 2011

hi, i make a text entry field with StandardWindow's method: newTextEntryFor: aModel getText: getSel setText: setSel getEnabled: enabledSel help: helpText how do i let that textentryfield verify the text for its validity (in its model) when one tries to leave that field and prevent the exiting from that field? or do i have to use another method (UITheme?) for this thing? werner

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Pharo on LinkedIn ...
by Geert Claes Feb. 18, 2011

Feb. 18, 2011

We would like to invite those Pharoers who have a LinkedIn account to join our LinkedIn Pharo group. http://www.linkedin.com/e/hzbhb7-gkawp6l9-36/vgh/2558378/ -- View this message in context: http://forum.world.st/Pharo-on-LinkedIn-tp3312461p3312461.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Dependencies and Monticello
by Andrew Black Feb. 17, 2011

Feb. 17, 2011

I probably don't understand how to use Monticello dependencies correctly. Here is the situation. Your help appreciated. I'm writing code that uses PetitParser. So, I added to my own package a dependency on PetitParser. Strangely, rather than linking to the PetitParser repository, this copies PetitParser into my repository when save a new version on my package. The problem is that I have found it necessary to change a few definitions in *PetitParser. (I would call these bug fixes, but that is a matter of opinion.) I didn't think that would be a problem; I put the overriding definitions into my package, and everything worked fine. That is, it worked fine until I started with a clean image and loaded my package. Monticello apparently loaded my package, and then loaded PetitParser. This over-wrote my (bug-fix) definitions with the original ones. Most of my tests failed. If I load my package a second time, them my definitions overwrite the ones from PetitParser, and all is well. I infer that Monticello packages are supposed to be load-order-independent. So, what is the right way to fix this problem (other than convincing Lukas that trimSpaces should, indeed, trimSpaces)? Andrew

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Lint checks & automated clean-up of unnecessary code.
by Paul DeBruicker Feb. 15, 2011

Feb. 15, 2011

Hi - Is there some place I could read about how automate the fixing of various lint checks? In a package I've written I have some sloppy parts left over from trying things, then trying other things, then finally settling on another approach entirely. For instance I have 84 instances of "Temporary variables read AND written" (RBOnlyReadOrWrittenTemporaryRule). I have 300+ methods that are implemented but not sent (RBImplementedNotSentRule), 10 un-referenced classes (RBClassNotReferencedRule), etc..... I could definitely go through and delete the temp variables by hand but am hopeful that I could just nuke them all at once, then run my tests and see what, if anything, needs replacing/repairing. Thanks for any guidance you can provide. Paul

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DateAndTime and nanos
by Norbert Hartl Feb. 15, 2011

Feb. 15, 2011

I'm trying to find out how to get a date in iso8601 and a precision more fine grained than seconds. But looking at the time based classes I didn't find anything useful. The nanos value seems to be also zero. And the milliSecondClock seems only be useful to measure durations. What can I use to get this achieved? Norbert

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About Coral
by Benjamin Feb. 14, 2011

Feb. 14, 2011

Hello guys, I want to write a little script that collect all the name of files in a folder then parse the name to change some characters and finally print the list. Quite simple :) But Stef tells me that it the perfect thing that should be done with Coral :) Do you know a good place to find lectures/tuto about Coral ? Thanks in advance, Ben

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layout question
by Werner Kassens Feb. 13, 2011

Feb. 13, 2011

Hi, similarly to the example in http://book.pharo-project.org i do this: win := StandardWindow new. panel:=win newRow: {win newOKButton. } . y :=(panel minExtent y). win addMorph: panel fullFrame: (LayoutFrame fractions: (0@1 corner: 1@1) offsets: (0@(0-y) corner: 0@0)). win openInWorld . but the okbutton is not completely visible. how do i calc y correctly? werner

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New success story online
by Adrian Lienhard Feb. 12, 2011

Feb. 12, 2011

We've added a new success story about a large Argentinian application based on Pharo: http://pharo-project.org/about/success-stories If you know about other interesting projects, please let me know. Cheers, Adrian __________________________ www.adrian-lienhard.ch twitter.com/adrianlienhard

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PharoCore 1.3: Settings
by Adrien BARREAU Feb. 12, 2011

Feb. 12, 2011

Hi, I'm searching how I can enable syntax highlighting in last PharoCore 1.3? And, is it possible to have the old inspector? I almost can't work with the new one. Cheers, Adrien.

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[ANN] Aida/Web 6.2 Spring edition is out
by Janko MivÅ¡ek Feb. 11, 2011

Feb. 11, 2011

Dear Smalltalkers, On the sunny side of the Alps we have a spring already, so let me bring a bit spring to you too with this new Aida release :) Fresh features from last month: - new event framework - unified JSON messaging (over WebSocket, Ajax, Comet) - pure JavaScript for Ajax, Prototype loaded only on demand - image based persistence - snapshot every hour - view active/logged sessions in Security - whitelisted IPs in Security - red 'browser not supported' warning on top of page And to repeat new features from Christmas beta: *Mobile* devices like smartpone and tablet support, with mobile device detection and special mobile CSS as addition to screen CSS, so that you can easily adapt your existing apps to mobile simply by overriding the existing CSS. *HTML5* support: Aida switches now to HTML5 by default and HTML5 specific features will be gradually added, WebSocket is there already, local storage and offline support comes next. *WebSocket* support for bidirectional communication between server and browser, as a replacement for Comet. WebSocket channel is now automatically open on the session with WebSocket capable browser. *JSON* messaging introduced to be gradually used as only message format in unified (Ajax or WebSocket) communication between server and browser *Widget forms" introduced, hierarchy of forms follow the hierarchy of standalone widgets, each widget can Ajax submit its own form together with subforms in subwidgets. There is now a continuously built One-click Pharo image (with new Aida preloaded and running) available via Download now button on http://wwww.aidaweb.si/download.html (thanks Pharo guys!). 6.2 is released on Squeak/Pharo and VisualWorks and it will be also avaiable on the soon to be released VisualWorks 7.8 CD. Release notes with most important new features highlighted are available at: http://www.aidaweb.si/release-notes-6.2 . Happy web smalltalking with new Aida! Janko -- Janko MivÅ¡ek AIDA/Web Smalltalk Web Application Server http://www.aidaweb.si

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windows/flaps not responding
by Markus Schlager Feb. 9, 2011

Feb. 9, 2011

Hi all, I'm currently teaching smalltalk with pharo1.1 on Linux to pupils (10th grade). Some of them are experiencing the following problem: After reopening their pharo-image none of the windows left open before nor the window-flap at the bottom are responsive to mouse-clicks. Wherever you're clicking on, the world-menu shows up. You can open new system windows though. These will behave nicely. Is there any way to reactivate the old system-windows and the flap? Unfortunately I discarded the buggy images. Essentially the pupils had been reading ProfStef-Tutorials and some workspaces and browsers opened. Markus

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Pharocasts: GUI with Polymorph
by laurent laffont Feb. 9, 2011

Feb. 9, 2011

Develop a contact manager desktop application. You will learn: - how Pharo helps the "Program by intention" style of programming - how to create basic persistency of created Contact object - how to compose a GUI, basic widgets, events and layout http://www.pharocasts.com/2011/02/pharo-gui-with-polymorph.html <http://www.pharocasts.com/2011/02/pharo-gui-with-polymorph.html> Laurent Laffont - @lolgzs <http://twitter.com/#!/lolgzs> Pharo Smalltalk Screencasts: http://www.pharocasts.com/ Blog: http://magaloma.blogspot.com/

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[ANN] JNIPort 2.0 for VisualWorks, Pharo and Squeak
by Joachim Geidel Feb. 5, 2011

Feb. 5, 2011

JNIPort 2.0 for VisualWorks, Pharo and Squeak is now available! JNIPort is a Smalltalk library which allows Java code to be invoked from Smalltalk. It acts as a bridge between the world of Smalltalk objects and a Java Virtual Machine (JVM) where Java code is executing. For more information see http://jniport.wikispaces.com JNIPort 2.0 for VisualWorks can be loaded from the Cincom Public Store Repository and from the JNIPort wiki at http://jniport.wikispaces.com/Downloads JNIPort 2.0 for Pharo and Squeak is available from SqueakSource at http://www.squeaksource.com/JNIPort.html and from the JNIPort wiki. The changes from JNIPort 1.9 are: - JNIPort can now be used in Pharo and Squeak. - Packages have been renamed such that the can be shared between Store and Monticello. - Platform specific code has been moved to separate packages to make the core packages portable between VisualWorks, Pharo, and Squeak. - The much-critized _null postfix used for selectors of wrapper methods which don't have arguments is gone. - A few bugs have been fixed. Installation instructions for VisualWorks are on the JNIPort wiki, instructions for Pharo and Squeak are on the wiki of the JNIPort project page of SqueakSource. I strongly encourage you to read the instructions before installing and using JNIPort. JNIPort 2.0 has been tested with: - VisualWorks from 7.5 to 7.8 (trent dec10.3) on Mac OS X 10.6.6 and Windows XP SP 3 - VisualWorks from 7.7 to 7.8 (trent dec10.3) on Ubuntu 10.04 (64bit) with both the 32-bit and the 64-bit VisualWorks VMs - Squeak 4.2 on Mac OS X 10.6.6 and Windows XP SP 3 - Pharo 1.1.1 and 1.2 on Mac OS X 10.6.6 and Windows XP SP 3 Known issues: - In Pharo 1.1.1, you may encounter an error when JNIPort tries to register a new Java object in an internal weak dictionary. This is a bug in Pharo's implementation of this collection class. I can't do anything about it. If you can't live with it, please upgrade to Pharo 1.2. - JNIPort for Pharo and Squeak currently cannot be used with the Cog VM. - Callbacks from foreign operating system threads cannot be used in Pharo and Squeak. The Alien foreign function interface does not yet support this feature. When you run the unit tests, three tests will fail because of this restriction. These failures are expected and do not indicate bugs. Best regards, Joachim Geidel

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Pharocasts: StringCalculator Kata
by laurent laffont Feb. 5, 2011

Feb. 5, 2011

This is the first Kata proposed by the 12meses12katas<http://www.12meses12katas.com/> (12 months 12 katas) initiative. You will learn: Test-Driven Development, the Pharo way. Recorded and edited by Rafael Luque <http://vimeo.com/user1627267> (big thank you!). Here: http://www.pharocasts.com/2011/02/stringcalculator-kata.html Laurent Laffont - @lolgzs <http://twitter.com/#!/lolgzs> Pharo Smalltalk Screencasts: http://www.pharocasts.com/ Blog: http://magaloma.blogspot.com/

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TFFiler: creates file containers to store external files in Monticello
by Tony Fleig Feb. 4, 2011

Feb. 4, 2011

I've published a tool I'm using called TFFiler. My problem was that I had a number of external files that were required for my Seaside web application. These were CSS, Javascript, and image files that had to be placed in a specific directory tree structure. When I moved my web app to another system, I always had to remember to reconstruct the external directory tree. Over time, the directory tree got larger and more complex. For deployment, I wanted the files to be served by Apache and not the Seaside ExternalFileLibrary. (ExternalFileLibrary was the most convenient approach during development.) This meant the directory tree should be moved to a location other than the Pharo Resources directory, which was the most convenient location during development. The current version of Monticello does not provide a way to save external files with a project. TFFiler addresses this shortcoming. Now when I load my project from Monticello the necessary external files are deployed automatically. Maybe someone else will find this useful as well. http://www.tonyfleig.com/smallthoughts/blog/tffiler http://www.squeaksource.com/TFFiler Regards, TF

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Matrix
by Werner Kassens Feb. 3, 2011

Feb. 3, 2011

Hi, i use Pharo-1.1-11411 and got a few questions. i looked at the comments of Matrix: it talks about Array2D but this object does not exist? it says "Element-wise matrix arithmetic works", but this is not true: while + - * functions in this way: aNumber + aMatrix, "/" does not always function: aSmallInteger / aMatrix produces an error, because aMatrix is tested with isZero. a simple fix would be to change the first program line in SmallInteger>>/ from: aNumber isZero ifTrue: [^(ZeroDivide dividend: self) signal]. to: (aNumber isNumber and: [aNumber isZero]) ifTrue: [^(ZeroDivide dividend: self) signal]. further aMatrix + aNumber and similar arithmetic dont work. but with the above fix it would work nicely with simple implementations like this: Collection>>/ / aNumber ^aNumber adaptToCollection: self andSend: #/ and so forth. while testing these things with Fractions, i noticed this: printing {3/4} produces this output:{(3/4)}. printing {{0.75}} produces this output:#(#(0.75)). printing {{3/4}} produces this output:{((Array new: 1) at: 1 put: (3/4); yourself)}. i wonder what the last output wants to tell me? does it want to tell me, that the last thing uses up a lot more memory than the first two, and accessing it takes more time, so that i should use the second thing instead, or is it (more or less) just print output related? werner

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auto compile accessors / updators
by Phil Feb. 1, 2011

Feb. 1, 2011

Is there an equivalent in in pharo/squeak of the GemStone method #compileMissingAccessingMethods cheers, phil

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