February 2021 - Pharo-users

EXIF / JPEG metadata
by Alistair Grant Nov. 30, 2025

Nov. 30, 2025

Hi Everyone, As far as I can tell, JPEGReadWriter in Pharo 7 doesn't read (or write) the image metadata, e.g. title, keywords, exposure time, etc. Is anyone aware of a package that does? Thanks! Alistair

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Re: [Pharo-users] Personal wiki / information manager
by Evan Donahue Sept. 25, 2023

Sept. 25, 2023

Seems that Pharo is a magnet for this kind of project. I've been writing one as well and using it to organize my research notes. Does anyone working on personal info mgmt tools want to talk offline? I expect we're running into some of the same issues, both conceptual and technical. Evan

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WebDav and CalDav in Pharo ?
by CÃ©drick BÃ©ler April 13, 2022

April 13, 2022

Hi all, I do some experiments with iCal. For now I serve a full calendar over HTTP. Not bad, but it is read only. Iâd like to try CalDAV. I was looking for it, and also webDAV. Gofer it smalltalkhubUser: 'UdoSchneider' project: 'FileSystemNetwork'; configuration; load. #ConfigurationOfFileSystemNetwork asClass project stableVersion load: 'Webdav' Iâve found the project of Udo, but it doesnât load on P8. I think this is due to the stream refactoring. Right now the image hung. Iâll try maybe to load it manually. But I was wondering oof there were other alternatives ? TIA, CÃ©drick

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grants Master Internship / offres de stage Master
by Pierre Bommel Feb. 10, 2022

Feb. 10, 2022

(sorry for redundancies) Hello, Bonjour, Hola, We are looking for a Master internship to work on Cormas, a simulation platform (https://github.com/cormas/cormas , or see here for our presentation at ESUG: https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view) Nous recherchons un stagiaire de Master pour travailler sur Cormas, une plateforme de simulation (https://github.com/cormas/cormas , cf. notre prÃ©sentation Ã ESUG: https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view) Estamos buscando un estudiante de MaestrÃa para trabajar en Cormas. Voici l'annonce en franÃ§ais (in English below) : https://www.hdigitag.fr/fr/les-offres-de-stage-digitag/ *Simulation participative de la gestion des ressources renouvelables dans des environnements hybrides* *Mots-clÃ©*: Simulation participative, Computer Vision , Smalltalk, Cormas * *DurÃ©e souhaitÃ©e du stageÂ (nombre de mois):*8 * *Date de dÃ©but du stage*: 1/02/2021 * *UnitÃ© de recherche*: Green, Cirad * *Contact*: Bommel Pierre : bommel(a)cirad.fr * *#DigitAg*: Axe 2 : Innovations en agriculture numÃ©rique, Axe 6 : ModÃ©lisation et simulation (systÃ¨mes de production agricole) / Challenge 1 :Â Le challenge agroÃ©cologique, Challenge 2 :Â Le phÃ©notypage rapide, Challenge 6 :Â La gestion des territoires agricoles, Challenge 7 :Â IntÃ©gration de lâagriculture dans les chaÃ®nes de valeur, Challenge 8 : DÃ©veloppement agricole au Sud Lâambition dâÃ©liminer les interfaces physiques qui permettent lâinteraction avec les machines est une idÃ©e ancienne dans le monde de lâinformatique qui a pris plusieurs directions. La plus emblÃ©matique pour le grand public a Ã©mergÃ© en 2005 sous le nom de âprojet Natalâ repris et dÃ©mocratisÃ© par Microsoft dans sa derniÃ¨re version baptisÃ©e âAzure Kinectâ (2019). Ce capteur dÃ©tecte les mouvements et les objets dans le champ de vision de lâutilisateur pour produire des rÃ©sultats dans un logiciel. Il a Ã©tÃ© abondamment dÃ©tournÃ© et enrichi depuis ses dÃ©buts grand public pour permettre de nouvelles maniÃ¨res dâinteragir avec les machines. Par ailleurs, le groupe de chercheurs Ã lâorigine de la crÃ©ation dâune plateforme de modÃ©lisation Ã base dâagents baptisÃ©e Cormas [1] fait actuellement face Ã des besoins accrus dâinteractivitÃ©s dans les simulations participatives. BasÃ©e sur le langage Smalltalk, Cormas est dÃ©veloppÃ©e depuis la fin des annÃ©es 1990 par une Ã©quipe fortement interdisciplinaire. Au-delÃ des usages traditionnels de la modÃ©lisation agents, Cormas se dÃ©marque des autres plateformes par des processus originaux de modÃ©lisation : lâapproche ComMod (pour Companion Modeling : modÃ©lisation dâaccompagnement [2]), qui vise Ã proposer des outils permettant de participer activement Ã la conception dâun modÃ¨le, mais aussi de sâimmerger dans des situations de jeux interactifs. Le jeu (de plateau ou informatisÃ©) sert alors de support pour Ã©changer sur une situation vÃ©cue. En 2012, pour la premiÃ¨re fois, lâÃ©quipe utilisait un video-projecteur Ã ultra-courte focale pour projeter sur une table un plateau de jeu. Ce simple changement a induit des comportements radicalement diffÃ©rents leur permettant une interaction beaucoup plus naturelle avec les simulations informatisÃ©es. En outre, la configuration spatiale des acteurs favorise les interactions sociales. Mais jusquâÃ aujourdâhui, la saisie manuelle par lâanimateur des dÃ©cisions prises par les joueurs reste nÃ©cessaire ce qui rÃ©duit la fluiditÃ© et la spontanÃ©itÃ© des interactions. LâÃ©quipe en charge du dÃ©veloppement de Cormas souhaite investiguer les possibilitÃ©s offertes par les nouvelles applications liÃ©es Ã la dÃ©tection dâobjets et de mouvements en portant un prototype de simulation participative dans le champ de la simulation hybride entre modÃ¨le informatique et jeu physique. Ce travail de preuve de concept appliquÃ© au modÃ¨le ReHab (modÃ¨le Ã©cole de ComMod) nÃ©cessitera de mettre au point des mÃ©thodes de dÃ©tection fiables dâobjets physiques pour Ãªtre intÃ©grÃ©es dans le calcul du nouvel Ã©tat simulÃ©. Aujourdâhui, Cormas sâappuie sur Pharo (Smalltalk open-source). Cette solution est dÃ©veloppÃ©e par lâINRIA et par un consortium de chercheurs et dâindustriels. La communautÃ© dynamique propose un ensemble de packages permettant de mutualiser le dÃ©veloppement de fonctionnalitÃ©s qui pourraient Ãªtre mobilisÃ©es pour proposer un prototype pour des simulation participative et la dÃ©tection dâobjets *English* : https://www.hdigitag.fr/en/digitag-master2-internship-offers/ *Participatory simulation of renewable resource management in hybrid environments* * *Keywords*: Participatory simulation, Computer Vision , Smalltalk, Cormas * *Duration*: 8 months * *Desired start date*: 1/02/2021 * *Research Unit*: Green, Cirad * *Contact*: Bommel Pierre â bommel(a)cirad.fr * *#DigitAg*: Axe 2,Axe 6 â Challenge 1,Challenge 2 ,Challenge 6 ,Challenge 7, Challenge 8 The ambition to remove the physical interfaces that allow interactions with computers is an old idea in the IT world that took several directions. The most emblematic one for the general public emerged in 2005 under the name of âProject Natalâ taken up and democratized by Microsoft in its latest version called âAzure Kinectâ (2019). This sensor detects movements and objects in the userâs field of vision to produce results in softwares.Â It has been abundantly diverted and enriched since its beginnings for the general public to allow new ways of interacting with computers. In addition, the group of researchers behind the development of an agent-based modeling platform called Cormas [1] is currently facing increased needs for interactivity in participatory simulations. Based on the Smalltalk language, Cormas has been developed since the late 1990s by a highly interdisciplinary team. Beyond the traditional uses of agent modeling, Cormas differs from other platforms by innovative modeling processes: the ComMod approach (Companion Modeling [2]), which aims to provide tools to actively participate in the design of a model, but also to immerse oneself in interactive game situations.Â The game (board or computer game) is then used as a support to exchange on a real-life situation. In 2012, for the first time, the team used an ultra-short focal projector to project a game board on a table. This simple change induced radically different behaviors of the actors allowing them to interact more naturally with computer simulations. In addition, the spatial configuration of the actors favors social interactions.Â But until today, manual input by the facilitator of the decisions taken by the players remains necessary, which reduces the fluidity and spontaneity of interactions. The team in charge of Cormasâ development wishes to investigate the possibilities offered by new opportunities related to the detection of objects and movements by bringing a prototype of participatory simulation in the field of hybrid simulation between computer model and physical game.This proof of concept work applied to the ReHab model (ComModâs school model) will require the development of reliable detection methods for physical objects to be integrated into the calculation of the new simulated state. Today, Cormas relies on Pharo (an open-source Smalltalk).Â This solution is implemented by INRIA and a consortium of researchers and industrialists. The dynamic community proposes a set of packages allowing to mutualize the development of functionalities that could be mobilized to propose a prototype for participative simulation and object detection

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How to flatten traits
by Jupiter Jones Nov. 22, 2021

Nov. 22, 2021

Hi All, There used to be a method to #flattenDownTraits that I canât find the equivalent in Pharo 8. How do you go about flattening traits now? Thanks for any advice. Cheers, J

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Rounding in Floats
by Esteban Maringolo June 17, 2021

June 17, 2021

Hi, Continuing with my issues with decimals, I'm having one issue that is not clear to me why it happens. If I do: (9.1 + (-2.0)) roundTo: 0.1. "7.1000000000000005" I expect to get a single decimal Float (rounded with whatever precision, but a single decimal). Even if I do something like this: 7.1 roundTo: 0.1 It gives the wrong result. In VW and VAST it provides the right result. (9.1 + (-2.0)) roundTo: 0.1 "7.1" In Dolphin it also returns the wrong result, it seems to use the same algorithm to round it. Is this a bug? Esteban A. Maringolo

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NeoCSVReader and wrong number of fieldAccessors
by jtuchel＠objektfabrik.de May 13, 2021

May 13, 2021

Happy new year to all of you! May 2021 be an increasingly less crazy year than 2020... I have a question that sounds a bit strange, but we have two effects with NeoCSVReader related to wrong definitions of the reader. One effect is that reading a Stream #upToEnd leads to an endless loop, the other is that the Reader produces twice as many objects as there are lines in the file that is being read. In both scenarios, the reason is that the CSV Reader has a wrong number of column definitions. Of course that is my fault: why do I feed a "malformed" CSV file to poor NeoCSVReader? Let me explain: we have a few import interfaces which end users can define using a more or less nice assistant in our Application. The CSV files they upload to our App come from third parties like payment providers, banks and other sources. These change their file structures whenever they feel like it and never tell anybody. So a CSV import that may have been working for years may one day tear a whole web server image down because of a wrong number of fieldAccessors. This is bad on many levels. You can easily try the doubling effect at home: define a working CSV Reader and comment out one of the addField: commands before you use the NeoCSVReader to parse a CSV file. Say your CSV file has 3 lines with 4 columns each. If you remove one of the fieldAccessors, an #upToEnd will yoield an Array of 6 objects rather than 3. I haven't found the reason for the cases where this leads to an endless loop, but at least this one is clear... I *guess* this is due to the way #readEndOfLine is implemented. It seems to not peek forward to the end of the line. I have the gut feeling #peekChar should peek instead of reading the #next character form the input Stream, but #peekChar has too many senders to just go ahead and mess with it ;-) So I wonder if there are any tried approaches to this problem. One thing I might do is not use #upToEnd, but read each line using PositionableStream>>#nextLine and first check each line if the number of separators matches the number of fieldAccessors minus 1 (and go through the hoops of handling separators in quoted fields and such...). Only if that test succeeds, I would then hand a Stream with the whole line to the reader and do a #next. This will, however, mean a lot of extra cycles for large files. Of course I could do this only for some lines, maybe just the first one. Whatever. But somehow I have the feeling I should get an exception telling me the line is not compatible to the Reader's definition or such. Or #readAtEndOrEndOfLine should just walk the line to the end and ignore the rest of the line, returnong an incomplete object.... Maybe I am just missing the right setting or switch? What best practices did you guys come up with for such problems? Thanks in advance, Joachim

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Class hierarchy diagram
by Sanjay Minni May 6, 2021

May 6, 2021

Is there any way to display the Class Hierarchy as a Diagram or a indented list. Even for all the classes in a package will do. ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Creating an SDL (OSWindow) window without showing the pharo interface
by kmo May 3, 2021

May 3, 2021

Does anyone know how to get an OSWindow window to open from Pharo without showing the pharo IDE? I thought the headless VM might do this. So I downloaded the latest headless VM and Pharo 9. Then if I issue the command line / pharo-ui Pharo.image eval OSWindowWorldMorph new open/ I get an SDL window but also the pharo user interface which I don't want. But if I try /pharo Pharo.image --no-quit eval OSWindowWorldMorph new open/ nothing happens. Pharo runs but nothing shows up. I expected just to get the SDL window. Can this be done in pharo? Anyone know the technique? -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Error in Pharo 9 under Windows 10
by Rafael Ignacio MatÃas Sniechowski March 1, 2021

March 1, 2021

Hi, Every time I try to start a Pharo 9 image I get an error. This happens with both 32 and 64 bit versions, under Windows 10. I've tried uninstalling and reinstalling Pharo Launcher without avail. This has been happening for the last 10 days. I don't know if this is the proper place to post this...if not please let me know. Attached it's an image with the error I get. thanks in advance Nacho *Ignacio Sniechowski*

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Strings in Playground are read only in Pharo 9
by Markus Wedel March 1, 2021

March 1, 2021

Hi all, strings in Playground are read only in Pharo 9.0 Build 1153 so that 'hello' at: 2 put: $a; yourself ctrl+p This throws an error: âModification forbidden: âhelloâ is read-only, hence its field cannot be modified with $a which is actually a very nice error message but is this supposed to happen? The example does work in Pharo 8 without problems. Greetings Markus

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[ANN] Next Pharo Sprint: Feb 26
by Marcus Denker Feb. 24, 2021

Feb. 24, 2021

We will organize a Pharo sprint Feb 26 (this Friday) Goals of this sprint: - Fix issues from tracker https://github.com/pharo-project/pharo/issues This is a Remote Sprint, it happens on Discord. http://pharo.org/contribute-events We have added a Board to coordinate the work: https://github.com/orgs/pharo-project/projects/9

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StackVM for M1 ready
by StÃ©phane Ducasse Feb. 18, 2021

Feb. 18, 2021

Hello happy Pharoers Today we could access our building where the M1 machine is and Pablo packaged it so that you can test the first version. Pablo wrote a little blog post for you. https://thepharo.dev/2021/02/16/first-apple-m1-pharo-version/ Let us since we do not have the M1 at hand and waiting to be able to make it accessible from our build farmâ¦ but we are not responsible for it and we were waitingâ¦. But the crew was fixing other VM glitches. So we will be ready soon to focus on the Jit version. S -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle FAX 03 59 57 78 50 TEL 03 59 35 86 16 S. Ducasse - Inria 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza Villeneuve d'Ascq 59650 France

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Problem with Dictionary and Associations
by David＠totallyobjects.com Feb. 17, 2021

Feb. 17, 2021

I am using STON to objects out to disk. Up to two days ago, I was reading them in as Dictionaries and converting to objects from there. All of a sudden yesterday morning, I got an error saying that the association is only indexable with integers. Even so, I don't seem to be able to access the contents. Fistly, any ideas why this has changed and secondly, any ideas how to fix it? David Totally Objects Sent from my Huawei tablet

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TinyBlog book
by danhunfeldz＠mail.com Feb. 14, 2021

Feb. 14, 2021

Using Pharo 8.0 64-bit, I ran this from the TinyBlog book: `Metacello new baseline:'TinyBlog'; ` `repository: 'github://LucFabresse/TinyBlog/src'; ` `onConflict: [ :ex | ex useLoaded ];` `load.` When I load the page and login as âadminâ and password, the page displays: # Seaside Walkback ## SubscriptOutOfBounds: 1 [Debug](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&1 'Open a debugger in your IDE and block until you hit "Proceed"')Â [Full Stack](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&2) ### Stack Trace 1. [thisContext](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&3)OrderedCollection(Object)>>errorSubscriptBounds:[self](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&4)an OrderedCollection() [index](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&5)1 2. [thisContext](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&6)OrderedCollection>>at:[self](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&7)an OrderedCollection() [anInteger](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&8)1[index](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&9)nil 3. [thisContext](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&10)OrderedCollection(SequenceableCollection)>>first[self](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&11)an OrderedCollection() 4. [thisContext](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&12)OrderedCollection(SequenceableCollection)>>anyOne[self](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&13)an OrderedCollection() 5. [thisContext](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&14)TBPostsReport class>>from:[self](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&15)TBPostsReport [aBlog](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&16)a TBBlog[report](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&17)nil[blogPosts](http://127.0.0.1:8080/TinyBlog?_s=AhLXaZ_NoKZ6CCc6&_k=KmiYK_nGojNSh9dO&18)nil Why is that, and what is the correction fir it? Thanks

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Hack to show timestamp and author on versions of methods
by Davide Varvello Feb. 11, 2021

Feb. 11, 2021

Hi Guys In my opinion it is really uncomfortable working without the timestamp of a specific version of a method, I read the explanation of Esteban in the previous thread (http://forum.world.st/pharo-8-method-versions-how-to-see-author-timestamp-t…) but probably it will take some time before to see a new VersionBrowser and the history based on git is not really a solution to me. So it took a day of debugging but I discovered the flow of "versions" in Pharo 8 and I added the logic of the timestamp and the author of a method. Basically I created a subclass of MessageList I named it VersionMessageList, in this way the original MessageList is preserved for other goals I can safely ignore. Now 1) You can file-in VersionMessageList.st (see below) and 2) You have to change VersionBrowser >> initializePresenters using VersionMessageList this way: VersionBrowser >> initializePresenters messageList := self instantiate: VersionMessageList . .... Be careful, it's a hack and it's working on Pharo8, I don't know if it works on Pharo9 Cheers Davide VersionMessageList.st <http://forum.world.st/file/t77843/VersionMessageList.st> -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[ANN] Willow-Bootstrap v13.1.0 [v13.1.0] released!
by Buenos Aires Smalltalk Feb. 10, 2021

Feb. 10, 2021

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[ANN] Willow v14.1.0 [v14.1.0] released!
by Buenos Aires Smalltalk Feb. 10, 2021

Feb. 10, 2021

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RB - New introduced refactorings
by Evelyn Cusi Lopez Feb. 9, 2021

Feb. 9, 2021

Hello all, These weeks I added new refactorings, following I will give some examples of them. *1. Create accessors with lazy initialization* This refactoring create accessors for variables with lazy initialization, for example: - we have a class Object subclass: #SomeClass instanceVariableNames: 'stringVar' classVariableNames: '' package: 'Example' - we can create accessors with lazy initialization executing this script: (RBCreateAccessorsWithLazyInitializationForVariableRefactoring variable: #stringVar class: SomeClass classVariable: false defaultValue: '''example''') execute the result of this refactoring is: SomeClass >> stringVar ^ stringVar ifNil: [ stringVar := '' ] SomeClass >> stringVar: anObject stringVar := anObject *2. Extract setUp refactoring* (is the first version by the moment, it need to be improved) This refactoring create a setUp method from a code fragment. You can select an interval of some code in a test method and call this refactoring to create a setUp method implementing that code and replace the code by nothing. The selected class need to be a subclass of TestCase. For example: - given a class TestCase subclass: #SomeTest instanceVariableNames: '' classVariableNames: '' package: 'Example' SomeTest >>testFoo self x. self assert: true SomeTest >> self x self doSomething - To extract setUp method you can execute this script: (RBExtractSetUpMethodRefactoring extract: (10 to: 16) from: #testFoo in: SomeTest) execute the result of this refactoring is: SomeTest >> setUp super setUp. self x. SomeTest >> testFoo self assert: true *3. Move method to class side refactoring* (This refactoring is still awaiting review) This refactoring move a method to class side. For example: - given a method ClassX >> annotatedBlockMarkup ^ '@@' - we can execute the refactoring with this script: (RBMoveMethodToClassSideRefactoring method: (ClassX >> #annotatedBlockMarkup) class: ClassX) execute. the result of this refactoring is: ClassX >> annotatedBlockMarkup ^ self class annotatedBlockMarkup ClassX class >> annotatedBlockMarkup ^ '@@' Any suggestions or comment of these refactorings are welcome. I hope these new refactorings are useful to you . Regards, Evelyn C.

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Magritte+Seaside 3.4.4+Pharo issues
by Sanjay Minni Feb. 9, 2021

Feb. 9, 2021

Hi I am posting these here (rather in desperation) as I seem to be stuck very erratically in Magritte. Magritte appeared to me the next best thing after sliced bread but somehow i just cant get it to toast. trying the simplest of the example - exercise 1 - from the booklet "Meta Data at work with Magritte" - item 4.3 - which is a form rendering CMPerson from the code example library Magritte-ContactManager - i now get errors / walkbacks in the Classes. Yet it seemed working earlier. (PS I have only loaded Pharo 8) - MAInternalEditorComponent - MAFileModelHandler MessageNotUnderstood__receiver_of__requiresMultipartForm__is_nil.pdf <http://forum.world.st/file/t368721/MessageNotUnderstood__receiver_of__requi…> MessageNotUnderstood__MAFileModelHandler___#key_.pdf <http://forum.world.st/file/t368721/MessageNotUnderstood__MAFileModelHandler…> I see it being used in desktop and probably in web (seaside) as well but somehow I am drawing a blank So can someone pls just help me and put any fixes as required (I will do a sprint over 2 weeks to get an app up) - - its a make or break for me ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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pharo 8 - method versions - how to see author/timestamp?
by PAUL DEBRUICKER Feb. 8, 2021

Feb. 8, 2021

Hi - Sometimes I want to revert to older versions of methods e.g. from an hour ago. In the "Recent versions of MyClass>>#myMethod" dialog no timestamps or authors are present. How do I see those? Thanks Paul

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UK Smalltalk User Group meeting - Wednesday February 24th
by Giovanni Corriga Feb. 7, 2021

Feb. 7, 2021

The next meeting of the UK Smalltalk User Group will be on Wednesday, February 24th. Christian Haider will guide us in a tour of the Amber dialect of Smalltalk and its Silk web framework. In his own words... Amber [1], created by Nicolas Petton, is a Smalltalk implemented in JavaScript running in a web browser. Silk [2], written by the Amber maintainer Herby VojÄÃk, is a web framework in Amber. I was looking for a good solution for the web for a long time. At the last ESUG, I was bugging everybody about a Smalltalk in the browser, because I decided to redo the frontend of my current project [3] in Smalltalk instead of JavaScript. There were some developments, but only Amber was available. So I tried it for real on a little side project [4] to see if this route is viable - spoiler: it is! Silk, the web framework, caught my attention and I fell in love with it. Silk is very simple, straight forward and powerful, just the properties I love Smalltalk for. A Silk is basically a facade for a DOM node in the browser allowing the programmer to build up and manipulate the DOM in a direct way. Silk is so easy and intuitive that it never stood in the way and just worked. So, I could just concentrate on the complexities of the web (and the app). In this presentation I will walk you through the setup, show you the Amber tools and explore what you can do with Silk. I will try to justify my enthusiasm and appreciation for Silk :-). About me: My name is Christian Haider [5] and I use Smalltalk since the mid-90s. Fortunately, I earn my living with Smalltalk and use it on a daily bases (mostly VisualWorks). I like programming UIs and graphics. My largest open source contribution is a PDF library [6], the most significant one is Values [7]. [1] https://amber-lang.net/ [2] https://smalltalkrenaissance.wordpress.com/2015/06/29/silk-is-just-too-flex… [3] https://unsere-gelder.de/ (in German) [4] https://covidcrt.uber.space/ (sources at https://github.com/ChristianHaider/CoViD19UI) [5] https://christianhaider.de/ (in German) [6] https://wiki.pdftalk.de/doku.php [7] https://wiki.pdftalk.de/doku.php?id=complexvalues Given the current COVID-19 restrictions, this will be an online meeting from home. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/UKSTUG/events/cbklbryccdbgc/ ) to receive the meeting details. Donât forget to bring your laptop and drinks! * <https://www.blogger.com/#>*

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Feb. 6, 2021

> Begin forwarded message: > > From: Pierre Bommel <bommel(a)cirad.fr> > Subject: [Esug-list] grants Master Internship / offres de stage Master > Date: 3 February 2021 at 18:49:20 CET > To: esug-list(a)lists.esug.org > > Hello, Bonjour, Hola, > > We are looking for a Master internship to work on Cormas, a simulation platform (https://github.com/cormas/cormas <https://github.com/cormas/cormas> , or see here for our presentation at ESUG:https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view <https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view>). > Nous recherchons un stagiaire de Master pour travailler sur Cormas, une plateforme de simulation (https://github.com/cormas/cormas <https://github.com/cormas/cormas> , cf. notre prÃ©sentation Ã ESUG:https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view <https://hackmd.iscpif.fr/GGwvzBFqRASE5zCzlRwArQ?view>). > Estamos buscando un estudiante de MaestrÃa para trabajar en Cormas. > > Voici l'annonce en franÃ§ais (in English below) : https://www.hdigitag.fr/fr/les-offres-de-stage-digitag/ <https://www.hdigitag.fr/fr/les-offres-de-stage-digitag/> > > Simulation participative de la gestion des ressources renouvelables dans des environnements hybrides > Mots-clÃ©: Simulation participative, Computer Vision , Smalltalk, Cormas > > DurÃ©e souhaitÃ©e du stage (nombre de mois): 8 > Date de dÃ©but du stage: 1/02/2021 > UnitÃ© de recherche: Green, Cirad > Contact: Bommel Pierre : bommel(a)cirad.fr <mailto:bommel@cirad.fr> > #DigitAg: Axe 2 : Innovations en agriculture numÃ©rique, Axe 6 : ModÃ©lisation et simulation (systÃ¨mes de production agricole) / Challenge 1 : Le challenge agroÃ©cologique, Challenge 2 : Le phÃ©notypage rapide, Challenge 6 : La gestion des territoires agricoles, Challenge 7 : IntÃ©gration de lâagriculture dans les chaÃ®nes de valeur, Challenge 8 : DÃ©veloppement agricole au Sud > Lâambition dâÃ©liminer les interfaces physiques qui permettent lâinteraction avec les machines est une idÃ©e ancienne dans le monde de lâinformatique qui a pris plusieurs directions. La plus emblÃ©matique pour le grand public a Ã©mergÃ© en 2005 sous le nom de âprojet Natalâ repris et dÃ©mocratisÃ© par Microsoft dans sa derniÃ¨re version baptisÃ©e âAzure Kinectâ (2019). Ce capteur dÃ©tecte les mouvements et les objets dans le champ de vision de lâutilisateur pour produire des rÃ©sultats dans un logiciel. Il a Ã©tÃ© abondamment dÃ©tournÃ© et enrichi depuis ses dÃ©buts grand public pour permettre de nouvelles maniÃ¨res dâinteragir avec les machines. > > Par ailleurs, le groupe de chercheurs Ã lâorigine de la crÃ©ation dâune plateforme de modÃ©lisation Ã base dâagents baptisÃ©e Cormas [1] fait actuellement face Ã des besoins accrus dâinteractivitÃ©s dans les simulations participatives. BasÃ©e sur le langage Smalltalk, Cormas est dÃ©veloppÃ©e depuis la fin des annÃ©es 1990 par une Ã©quipe fortement interdisciplinaire. Au-delÃ des usages traditionnels de la modÃ©lisation agents, Cormas se dÃ©marque des autres plateformes par des processus originaux de modÃ©lisation : lâapproche ComMod (pour Companion Modeling : modÃ©lisation dâaccompagnement [2]), qui vise Ã proposer des outils permettant de participer activement Ã la conception dâun modÃ¨le, mais aussi de sâimmerger dans des situations de jeux interactifs. Le jeu (de plateau ou informatisÃ©) sert alors de support pour Ã©changer sur une situation vÃ©cue. > > En 2012, pour la premiÃ¨re fois, lâÃ©quipe utilisait un video-projecteur Ã ultra-courte focale pour projeter sur une table un plateau de jeu. Ce simple changement a induit des comportements radicalement diffÃ©rents leur permettant une interaction beaucoup plus naturelle avec les simulations informatisÃ©es. En outre, la configuration spatiale des acteurs favorise les interactions sociales. Mais jusquâÃ aujourdâhui, la saisie manuelle par lâanimateur des dÃ©cisions prises par les joueurs reste nÃ©cessaire ce qui rÃ©duit la fluiditÃ© et la spontanÃ©itÃ© des interactions. > > LâÃ©quipe en charge du dÃ©veloppement de Cormas souhaite investiguer les possibilitÃ©s offertes par les nouvelles applications liÃ©es Ã la dÃ©tection dâobjets et de mouvements en portant un prototype de simulation participative dans le champ de la simulation hybride entre modÃ¨le informatique et jeu physique. Ce travail de preuve de concept appliquÃ© au modÃ¨le ReHab (modÃ¨le Ã©cole de ComMod) nÃ©cessitera de mettre au point des mÃ©thodes de dÃ©tection fiables dâobjets physiques pour Ãªtre intÃ©grÃ©es dans le calcul du nouvel Ã©tat simulÃ©. > > Aujourdâhui, Cormas sâappuie sur Pharo (Smalltalk open-source). Cette solution est dÃ©veloppÃ©e par lâINRIA et par un consortium de chercheurs et dâindustriels. La communautÃ© dynamique propose un ensemble de packages permettant de mutualiser le dÃ©veloppement de fonctionnalitÃ©s qui pourraient Ãªtre mobilisÃ©es pour proposer un prototype pour des simulation participative et la dÃ©tection dâobjets > > > English : https://www.hdigitag.fr/en/digitag-master2-internship-offers/ <https://www.hdigitag.fr/en/digitag-master2-internship-offers/> > > Participatory simulation of renewable resource management in hybrid environments > Keywords: Participatory simulation, Computer Vision , Smalltalk, Cormas > Duration: 8 months > Desired start date: 1/02/2021 > Research Unit: Green, Cirad > Contact: Bommel Pierre â bommel(a)cirad.fr <mailto:bommel@cirad.fr> > #DigitAg: Axe 2,Axe 6 â Challenge 1,Challenge 2 ,Challenge 6 ,Challenge 7, Challenge 8 > The ambition to remove the physical interfaces that allow interactions with computers is an old idea in the IT world that took several directions. The most emblematic one for the general public emerged in 2005 under the name of âProject Natalâ taken up and democratized by Microsoft in its latest version called âAzure Kinectâ (2019). This sensor detects movements and objects in the userâs field of vision to produce results in softwares. It has been abundantly diverted and enriched since its beginnings for the general public to allow new ways of interacting with computers. > > In addition, the group of researchers behind the development of an agent-based modeling platform called Cormas [1] is currently facing increased needs for interactivity in participatory simulations. Based on the Smalltalk language, Cormas has been developed since the late 1990s by a highly interdisciplinary team. Beyond the traditional uses of agent modeling, Cormas differs from other platforms by innovative modeling processes: the ComMod approach (Companion Modeling [2]), which aims to provide tools to actively participate in the design of a model, but also to immerse oneself in interactive game situations. The game (board or computer game) is then used as a support to exchange on a real-life situation. > > In 2012, for the first time, the team used an ultra-short focal projector to project a game board on a table. This simple change induced radically different behaviors of the actors allowing them to interact more naturally with computer simulations. In addition, the spatial configuration of the actors favors social interactions. But until today, manual input by the facilitator of the decisions taken by the players remains necessary, which reduces the fluidity and spontaneity of interactions. > > The team in charge of Cormasâ development wishes to investigate the possibilities offered by new opportunities related to the detection of objects and movements by bringing a prototype of participatory simulation in the field of hybrid simulation between computer model and physical game.This proof of concept work applied to the ReHab model (ComModâs school model) will require the development of reliable detection methods for physical objects to be integrated into the calculation of the new simulated state. > > Today, Cormas relies on Pharo (an open-source Smalltalk). This solution is implemented by INRIA and a consortium of researchers and industrialists. The dynamic community proposes a set of packages allowing to mutualize the development of functionalities that could be mobilized to propose a prototype for participative simulation and object detection > > _______________________________________________ > Esug-list mailing list > Esug-list(a)lists.esug.org > http://lists.esug.org/mailman/listinfo/esug-list_lists.esug.org -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle FAX 03 59 57 78 50 TEL 03 59 35 86 16 S. Ducasse - Inria 40, avenue Halley, Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza Villeneuve d'Ascq 59650 France

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RabbitMQ and Pharo
by saogat.rab＠icloud.com Feb. 5, 2021

Feb. 5, 2021

Hi, I was wondering if anyone here used RabbitMQ in Pharo. Would like to hear about your experience. Kind regards, Saogat

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Migrating RBLintRules to Renraku rules
by Sebastian Jordan Feb. 4, 2021

Feb. 4, 2021

Hi, I have found out that RBLintRule will be deprecated. I have a code that uses RBLintRule and I need to migrate it to Renraku Rules. I have a code that applies an RB transformation rule to a set of packages. Currently, I obtain the changes of the transformation with the following code: (RBSmalllintChecker runRule: anRBTransformationRule onEnvironment: env) builder Can someone please explain me how to do this but using ReNodeRewriteRule and ReSmalllintChecker? Thank you in advance, Sebastian

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