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Re: How to intercept instvar write - MetaLinks + anonymous subclass problem
by Petr Fischer Feb. 2, 2019

Feb. 2, 2019

> is possible to intercept (before writeÃº all instance variable writes on every existing objects? > > I found a discussion here: > http://forum.world.st/Is-it-possible-to-follow-an-object-through-a-computat… > > Known solutions: > .... > 3) Metalinks - it's based on intercepting method calls, right? But I need to intercept direct instance variable write, so probably not possible Ok, I learned more about MetaLinks and it's perfectly possible to intercept instance variable writes via. installing MetaLink into object instance (cool) - then I can intercept instvar write, but one problem immediately occurs: when installing MetaLink into object instance, an original object class is exchanged to anonymous subclass of the original class - and because typical #= method is implemented like: = self == anObject ifTrue: [ ^ true ]. self class = anObject class ifFalse: [ ^ false ]. ... then most of #= comparisons in application logic is broken due to "self class = anObject class" part. Is there any way to solve this problem? Thanks! pf

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LibGit error at start up
by Hilaire Feb. 1, 2019

Feb. 1, 2019

Hi, I downloaded separately stable P7.0 32 bits image and linux VM. When I fire up, I got this start up error related to Git (which I do not use), see log. It looks like reproducible problem. On the CLI, there is a funny error message "file too short": hilaire@PCHome:~/Travaux/Developpement/DrGeoII/trunk/build/tmp/vm$ ./pharo ./Pharo.image ioLoadModule(./lib/pharo/5.0-201901051900/libgit2.so): Â ./lib/pharo/5.0-201901051900/libgit2.so: fichier trop court ioLoadModule(/home/hilaire/Travaux/Developpement/DrGeoII/trunk/build/tmp/vm/./lib/pharo/5.0-201901051900/libgit2.so): Â /home/hilaire/Travaux/Developpement/DrGeoII/trunk/build/tmp/vm/./lib/pharo/5.0-201901051900/libgit2.so: fichier trop court tryLoading(/home/hilaire/Travaux/Developpement/DrGeoII/trunk/build/tmp/vm/lib/pharo/5.0-201901051900/libgit2.so/.libs/,libgit2.so): stat(/home/hilaire/Travaux/Developpement/DrGeoII/trunk/build/tmp/vm/lib/pharo/5.0-201901051900/libgit2.so/.libs/) N'est pas un dossier External module not found ExternalLibraryFunction(Object)>>error: ExternalLibraryFunction(Object)>>externalCallFailed ExternalLibraryFunction(ExternalFunction)>>invokeWithArguments: LGitLibrary>>libgit2_init FFICalloutAPI>>function:module: -- Dr. Geo http://drgeo.eu

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Class name with diacritic character and Pharo
by Dominique Dartois Feb. 1, 2019

Feb. 1, 2019

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Why DirectoryIsNotEmpty on FileReference>>deleteAll ?
by Albrecht Baur Feb. 1, 2019

Feb. 1, 2019

I get a DirectoryIsNotEmpty exception on FileReference(AbstractFileReference)>>deleteAll. But deleteAll is supposed to delete children too. -> So why the exception ? I can reproduce it with: --- | sourceFolder deleteMeFolder numberOfRetries | sourceFolder := '/network-drive-mounted-via-cifs/delme-tmpl/'. deleteMeFolder := '/network-drive-mounted-via-cifs/delme/'. "copy sourceFolder to deleteMeFolder:" sourceFolder asFileReference copyAllTo: deleteMeFolder asFileReference . "delete deleteMeFolder again:" numberOfRetries := 0. [Â Â Â deleteMeFolder asFileReference deleteAll ] on: DirectoryIsNotEmpty do: [:ex| Â Â Â (numberOfRetries := numberOfRetries + 1) < 5 Â Â Â Â Â Â ifTrue: [ ex retry ]Â Â Â ]. Transcript crLog . Transcript show: 'Retries: ', numberOfRetries asString . --- ---> numberOfRetries is now = 1 ! BUT: this only happens when sourceFolder and deleteMeFolder are on a network drive mounted via cifs. (linux fstab entry like: //host/share /network-drive-mounted-via-cifs/ cifs credentials=...,uid=... 0 0 ) How do I handle such situations when working with the file library on network drives? (My "retry on exception" workaround seems hackish to me.) Thanks, Albrecht

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Seaside or Iliad for business applications?
by Siemen Baader Feb. 1, 2019

Feb. 1, 2019

Hi, Iâm a very happy Iliad user but Iâm wondering if it would make sense to switch to Seaside for commercial development since it has a larger user base. I have only used Seaside briefly to try it out and found I was more happy with Iliad back then, but now Iâd like to hear your input. Especially from those of you who use it for business applications with paying customers. My questions are: - does Seaside support partial updates of the DOM, like Iliad, or do I need to refresh the whole website for every interaction? - Iliad has REST-like URLS that look clean and can be shared, Seaside seems not to. Is this possible with Seaside? - directly writing javascript. I suppose there is a WAComponent that can emit raw JS? - what is the status of Websocket / Comet in Seaside? Is there anything else I should consider? thanks, Siemen

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Smalltalkhub server maintenance planned February, 5th
by Christophe Demarey Feb. 1, 2019

Feb. 1, 2019

Hello, A maintenance of smalltalkhub server is planned next Tuesday: February, 5th starting at 7:30 UTC time. The service should be back a few minutes later. The Pharo team.

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How to intercept every instance variable write on all objects
by Petr Fischer Jan. 31, 2019

Jan. 31, 2019

Hello, is possible to intercept (before writeÃº all instance variable writes on every existing objects? I found a discussion here: http://forum.world.st/Is-it-possible-to-follow-an-object-through-a-computat… Known solutions: 1) jugglery with object read only state + ModificationForbidden - not ideal, it's probably slow via exceptions and every nested on:do: stop change detection 2) it's possible to do it via slots - but it does not work on any existing object (only on my specially prepared objects with slots) 3) Metalinks - it's based on intercepting method calls, right? But I need to intercept direct instance variable write, so probably not possible Is there any way? Thanks! pf

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Opening a System Browser
by David Richards Jan. 31, 2019

Jan. 31, 2019

>From 2018-09-29-UpdatedPharoByExample.pdf page 20: [image: image.png] How to do this with Calypso? Smalltalk tools openClassBrowser ...?... Thanks.

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[ANN] Pharo open documentation
by Cyril Ferlicot Jan. 31, 2019

Jan. 31, 2019

Hi everyone! With some other members of the community we are proud to announce a new effort on Pharo documentation. We launched an organization pharo-open-documentation which is a user-maintained documentation related to Pharo environment, language, and libraries. Currently it has three main projects: - pharo-wiki : Wiki related to the Pharo programming language and environment. - awesome-pharo : A collection of awesome Pharo libraries, tools, frameworks and software. We want to make this project a reference in https://github.com/sindresorhus/awesome - awesome-pharo-ml : List of projects, books, booklets, papers, and applications related to machine learning, AI, data science in Pharo. Contributions are welcomed! If you own a cool project in Pharo others could use in their own projects, send us a PR to awesome-pharo! If you have knowledge on Pharo or projects of Pharo, we would be glad if you could contribute to the pharo-wiki! Don't forget to read the contribution guidelines. ;) We opened a Twitter to announce new entries on the pharo-wiki. https://twitter.com/PharoOpen Have a nice day! -- Cyril Ferlicot https://ferlicot.fr

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Fwd: startup error in windows 10
by Hilaire Jan. 31, 2019

Jan. 31, 2019

Hi, Any idea? It seems related to an error calling Cairo library. Hilaire -------- Message transfÃ©rÃ© -------- SujetÂ : startup error in windows 10 DateÂ : Sun, 27 Jan 2019 23:53:36 -0700 (MST) DeÂ : d_koticha [via Dr. Geo Forum] <ml+s996172n4025532h46(a)n3.nabble.com> PourÂ : Hilaire Fernandes <hfern(a)free.fr> I Installed Dr Geo and used it few times before November 2018. after updating windows 10 in January 2019 the app doesn't display drawing area. it loads but shows a red screen with some code and a cross. screen shot is attached. error.jpg <http://forum.drgeo.eu/file/n4025532/error.jpg> ------------------------------------------------------------------------ If you reply to this email, your message will be added to the discussion below: http://forum.drgeo.eu/startup-error-in-windows-10-tp4025532.html To start a new topic under Dr. Geo users, email ml+s996172n4023913h57(a)n3.nabble.com To unsubscribe from Dr. Geo Forum, click here <http://forum.drgeo.eu/template/NamlServlet.jtp?macro=unsubscribe_by_code&no…>. NAML <http://forum.drgeo.eu/template/NamlServlet.jtp?macro=macro_viewer&id=instan…>

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