June 2021 - Pharo-users - lists.pharo.org

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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Communication between different images
by Esteban Maringolo July 3, 2021

July 3, 2021

Hi, I'm rearchitecting a web app to perform updates only when necessary (instead of computing them all the time) on each request, I can have a global announcer and subscribers to know when to update within an image, but is there a way to have something like that but for inter-image coordination? I'd only need to communicate the id and the class name (or a similar identifier), so on other images they'll update accordingly, and if there is an update in one image, it will notify the other images. The common data is on the database, so this is just to avoid re-reading a lot of things. Is a message queue a good fit for this? Pub/Sub? What is available in Pharo that works without having to set up a lot of things? Thanks! Esteban A. Maringolo

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Fwd: [vwnc] Exception in Regex11 1.4.6
by Steffen MÃ¤rcker June 29, 2021

June 29, 2021

Hi! Does Pharo use the Regex11 package? If yes, has it already diverged from the version shipped with VisualWorks? The reason I am asking is that I just pushed an update to the public store. It addresses a bug that prevented $[ to be used in a character class. For details, see the excerpt below. Furthermore, you might have an opinion on allowing more escape sequences in character classes, don't you? Kind regards, Steffen ----- Weitergeleitete Nachricht ----- Von: Steffen MÃ¤rcker <merkste(a)web.de> An: 'VWNC' <vwnc(a)cs.uiuc.edu> Betreff: Re: [vwnc] Exception in Regex11 1.4.6 Datum: Thu Jun 24 2021 18:47:01 GMT+0200 (MitteleuropÃ¤ische Sommerzeit) Hi! I just published Regex11 version 1.4.7 with the following changes: 1. Fix: Character sets could not contain an opening bracket $[. 2. Fix: Character sets could not contain the characters '[:', e.g. as in '[[:something]' asRegex. I also provided additional tests for the improved functionality. I might tidy the code a bit later in a minor version bump. Just to note that Regex11 uses [[:xxx:]] as a special syntax, which might interfere with attempts to allow [[] and []]. Indeed. If I did no mistake, the new version does not break this. I agree with the idea to allow backslash escaping in character classes too, with the default being that backslash followed by any character is parsed as that character. I also like the idea of allowing more backslash escaping in character classes. However, I still have the bad feeling that this might change the semantics of existing code. Hence, I refrained from implementing this right away until I am more confident that this does not break other peoples stuff. Currently only a few explicitly defined backslash escapes are recognized, forcing the user to remember whether a given character can be used as-is in a given context, or must be escaped. A couple of gotchas (probably not applicable in a character set?): \< an empty string at the beginning of a word \> an empty string at the end of a word Thanks, I'll keep them in mind and consider them when I decide to implement the changes. OT: I also noticed that repetition, e.g. '.{5}' behaves strange. For instance, '.{{5}}' should match 'a{{{{{}' but it doesn't. Has anyone an opinion on that one? Best regards, Steffen -- Gesendet mit Vivaldi Mail. Laden Sie Vivaldi kostenlos von vivaldi.com herunter.

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SerialPort hangs image in combination with Raspberry Pico (Windows)
by Rob van Lopik June 29, 2021

June 29, 2021

I have the following strange situation, where SerialPort>>nextPutAll: hangs when sending to a COM port that is (USB) connected to a Raspberry Pico (RP2040). The Pico contains a simple program (sketch) that echoes all input on it USB-serial port. This is written with the Arduino IDE. The echo function works OK with the Arduino Serial monitor, PuTTY and a simple Python progran. When I put the same echo program on another Arduino board (e.g. Uno or Adafruit Feather) Pharo's SerialPort does work fine. I have tested with 32 and 64 bits versions of Pharo 5, 7 and 8. All on Windows; on Raspbian there is no problem. So, there is something peculiar with the combination of the SerialPlugin and the USBserial implementation on the Pico (which uses TinyUSB), but I am at a loss as to where to search. Maybe somebody has a hint. I have seen problems with the Serial Plugin in the past. I ran into this when developing a driver for the Raspberry Pico, where the Pico runs the picod daemon (http://abyz.me.uk/picod/index.html) This code is in https://github.com/robvanlopik/picod-pharo and does not work on Windows. Rob van Lopik

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Is there an easy way to cherry pick methods from another branch in iceberg?
by Tim Mackinnon June 29, 2021

June 29, 2021

Hi guys - while I mostly get along with Iceberg and can do common stuff - there are still a few things that I'm not sure on the best way to work. A recent one, was that I created a branch for an experiment - decided not to use and then went back to master to try again. However if I want to cherry pick code (particularly a few methods) - is there nothing I can use to do this easily? I can browse the branch in the repo explorer and see diffs of methods to master - but why can't I load any of those methods (or am I missing something obvious here?) The other item that still confuses me today - how can I easily revert back to previous point in time, essentially undo work I've commited and possible pushed to my git repo. I also struggle with this one - end up with a detached head and flail around. I don't understand why this is so hard to do - and can only think its because everything is based on graphs of graphs and so there is the potential that going back in time can break this? Anyway - what is the foolproof way to go back to the older point, and then start coding so that this becomes the new Head? Pointers on these two items greatly appreciate for my road to vcs greatness (and gosh I mess Envy - as I haven't asked about showing me deleted "available methods" and "classes") Tim

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[ANN] Pharo Consortium New Academic Member: DGtal Aqua Lab
by Marcus Denker June 24, 2021

June 24, 2021

The Pharo Consortium is very happy to announce that the DGtal Aqua Lab has joined the Consortium as an Academic Member. About ===== - DGtal Aqua Lab: https://wwp.shizuoka.ac.jp/dgtalaqualab/ - MOBYDIC: https://wwp.shizuoka.ac.jp/dgtalaqualab/mobydic/ - Pharo Consortium: http://consortium.pharo.org The goal of the Pharo Consortium is to allow companies and institutions to support the ongoing development and future of Pharo. Individuals can support Pharo via the Pharo Association: http://association.pharo.org/

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