March 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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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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Problem installing Seaside on Windows
by David Pennington April 2, 2021

April 2, 2021

Hi everyone. I have been developing a new web site using Seaside on my M1 MacBookAir and I have had no issues. To deploy it, I have to install Pharo on either a Windows 10 or a Windows Server 2012 server. Pharo has installed on both without any issues. However, I am having problems installing Seaside. I have Pharo 8.0 installed on both (64 bit version). If I try and install from the Catalog, I get the following error in the Transcript. IceGenericError: Failed to stat file 'C:/Users/david/Documents/Pharo/images/Pharo 8.0 - 64bit (stable)/pharo-local. If I try using Monticello, I get the following: Metacello new baseline:'Seaside3'; repository: 'github://SeasideSt/Seaside:master/repository'; load I got an error while cloning: There was an authentication error while trying to execute the operation: . This happens usually because you didn't provide a valid set of credentials. You may fix this problem in different ways: 1. adding your keys to ssh-agent, executing ssh-add ~/.ssh/id_rsa in your command line. 2. adding your keys in settings (open settings browser search for "Use custom SSH keys" and add your public and private keys). 3. using HTTPS instead SSH (Just use an url in the form HTTPS://etc.git) I will try to clone the HTTPS variant. Can you help please? David Totally Objects

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[ANN] Mole v3.2.0 [v3.2.0] released!
by Buenos Aires Smalltalk April 2, 2021

April 2, 2021

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Roassal3 Popups
by Evan Donahue April 1, 2021

April 1, 2021

Hello, Just returning to Pharo after 1000 years and have discovered that Roassal has upgraded to Roassal3. Trying to update my inspector integrations and can't seem to figure out how to get popups working. How can I get popups for the y values in a scatter plot such as the following: RSChart new addPlot: (RSScatterPlot new y: #(1 2 3)). Thanks, Evan

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Glamour: fastTables menu separator issue
by Federico.Balaguer March 30, 2021

March 30, 2021

Hello! I came across a problem with Glamour's fastTables, menu separators are not displayed. I have a running example based on PBE2CodeEditor example that shows the problem. I am not sure whether it makes sense to share that here. I spent a couple of hours trying to find the code that generate the menues with no luck (subclasses of GLMMorphicWidgetRenderer) . Could someone give me a hint where to look at? Thanks! Federico -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[ANN] Superluminal v2.0.0 [v2.0.0] released!
by Buenos Aires Smalltalk March 30, 2021

March 30, 2021

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change process variable while process is running
by mspgate＠gmail.com March 29, 2021

March 29, 2021

Hello everybody, I am kind of new to Pharo so I apologise if my\ question is silly :)\ how can a change a variable in a process while the process is running?\ for example in:\ \[\[ | msg| msg := 'help me'. 100 timesRepeat: \[(Delay forSeconds: 0.5)\ wait. Transcript show: msg; cr\]\] fork.\ \ how do I change the value of msg while the process is running in order\ to modify what the Transcript is showing?\ is that possible?\ thanks.\ Domenico

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Connecting to a MongoDB Atlas Cluster
by Sanjay Minni March 29, 2021

March 29, 2021

Hi can anyone pls help me with an example of connecting to a MongoDB Atlas cluster (their cloud service). My Atlas cluster replica set is at the urls yyyy-shard-00-00.xxxxx.mongodb.net:27017 yyyy-shard-00-01.xxxxx.mongodb.net:27017 yyyy-shard-00-02.xxxxx.mongodb.net:27017 The MongoDB Atlas website specifies the application connectstring as 'mongodb+srv://<username>:<password>@yyyy.xxxxx.mongodb.net/<mydefaultdatabase>?retryWrites=true&w=majority" I saw the doc / example on pharo-nosql/mongotalk but could not figure out in MongoClient - 1. how to get embed the username:password in the connectstring which i feel would be needed, 2. how to specify the default database 3. is it required to specify all three members while Mongo suggests a single part connect string which probably must be covering the cluster thanks ----- cheers, Sanjay -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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

March 24, 2021

We will organize a Pharo sprint / Moose dojo March 26 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 A list of all Pharo Event of the year an be found here: https://association.pharo.org/events

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UK Smalltalk User Group meeting - Wednesday March 31st
by Giovanni Corriga March 22, 2021

March 22, 2021

The next meeting of the UK Smalltalk User Group will be on Wednesday, March 31st. In this meeting, Juan Vuletich will present a Vector Graphic implementation in Cuis Smalltalk. Graphics for interactive software have traditionally been constrained for performance reasons. The consequence is that most software has serious trouble adapting to higher resolution screens, requires platform specific widget kits, provides limited functionality, and has sub optimal visual quality. But improvements in computing power over the last couple of decades enable a brighter future: Cuis Smalltalk provides a VectorGraphics based implementation of the Morphic UI framework that addresses all these issues. Juan is a long standing member of the Open Source Smalltalk community. He started Cuis Smalltalk ( https://www.cuis-smalltalk.org/ ) 12 years ago and has led it ever since. He has been contributing kernel code to Squeak and the Squeak VM for over 20 years. He holds an Ms.Sc. in Computer Science from the University of Buenos Aires. 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/cbklbryccfbgc/ ) to receive the meeting details. Donât forget to bring your laptop and drinks!

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[ANN] Develop in Pharo 9, run on Javascript
by Noury Bouraqadi March 15, 2021

March 15, 2021

Hi everyone, We have been working on porting PharoJS to Pharo 9 for a while now. And we managed to reach the end of the tunnel this week. All PharoJS tests are now green on Pharo 9. Find out more at: https://github.com/PharoJS/PharoJS Dave & Noury

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Pharo - GSOC 2021
by Serge Stinckwich March 15, 2021

March 15, 2021

Dear all, great news I want to share with you: Pharo has been selected to be part of GSOC 2021 https://summerofcode.withgoogle.com/organizations/?sp-search=pharo#46672743… Thank you to the great team of admins for making this happen: Oleksandr Zaitsev, Gordana Rakic and Juan Pablo Sandoval Alcocer ! We will send updates soon on the student selection process soon. Regards, -- Serge Stinckwic h https://twitter.com/SergeStinckwich

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[ANN] Willow v14.2.0 [v14.2.0] released!
by Buenos Aires Smalltalk March 15, 2021

March 15, 2021

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Interested in gig work opportunity?
by James Foster March 14, 2021

March 14, 2021

I have a self-funded hobby project (unrelated to any employer or company) that involves porting some Python code to Pharo. The initial task involves porting about 100 classes with 600 methods and writing tests for each of them and Iâve budgeted US$1200. I realize that this isnât a big job or much money, and Iâm mostly curious to find out whether anyone with the needed skills is interested. If so, please contact me at smalltalk(a)jgfoster.net <mailto:smalltalk@jgfoster.net> with a brief summary of your Pharo and Python experience. Take care not to reply to the group unless you want to let me know publicly that this sort of inquiry is inappropriate or unreasonable! James

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[ANN] Boardwalk v6.1.0 [v6.1.0] released!
by Buenos Aires Smalltalk March 12, 2021

March 12, 2021

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Code not showing all items in directory
by David Pennington March 11, 2021

March 11, 2021

Hi there. I am a long time user of VAST recently moved to Pharo. I have a directory that contains 20 JSON items. I am using the following code to load all of them into a collection. bucketList | top fileDirectory bucketList nameList | top := FileSystem disk workingDirectory. fileDirectory := top / 'TinyKVDB' / self bucket. bucketList := fileDirectory children. nameList := SortedCollection new. bucketList do: [ :each | nameList add: each asString ] . ^ nameList The code is only loading 18 of the items in the directory. I cannot see that there is anything different between there 18 and the other 2. Can anyone give me some clues here? David TotallyObjects

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Simple statistics package?
by Esteban Maringolo March 8, 2021

March 8, 2021

Hi, I need to perform simple statistical analysis over a small set of objects (~10-1000 max), basic stuff like getting the quartiles, mean, average of a certain set and perform moving averages. I'm looking for something where I can pass a collection of objects of my domain, an accessor and get the values mentioned above. I know there is PolyMath, but it seems to be oriented towards heavy number crunching and mathematical abstractions as its input. E.g. The PMHistogram works on pure numbers, so once I build it, I cannot know which of my objects fall into what group of the histogram. Does such a thing exist? Regards! Esteban A. Maringolo

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