August 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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The ideal font for Pharo
by tau Sept. 7, 2021

Sept. 7, 2021

I've been bothered by the assignement operator (:=) and the way the colon and the equal sign aren't verticaly aligned when coding in Pharo. So I began a quest to find a pharo-friendly font were the colon and equal sign are aligned. Turn out most monospaced fonts don't qualify but I did find the following fonts: * Fira Code (https://fontlibrary.org/en/font/fira-code) has a := ligature that doesn't work in Pharo. * Iosevka extended (https://fontlibrary.org/en/font/iosevka-extended) also has a := ligature that doen't work in Pharo. * Mononoki (https://fontlibrary.org/en/font/mononoki) has the two characters properly aligned but I dislike the appareance of that font. The @, in particular, looks like it comes from a low-resolution terminal from the early '80s. * Fantasque Sans Mono (https://fontlibrary.org/en/font/fantasque-sans-mono) has perfectly aligned colon and equal sign and moreover has a nice informal look. So, Fantasque Sans Mono is now my favorite font for coding in Pharo ð.

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Silly question about storing and displaying currency amounts?
by David Pennington Sept. 1, 2021

Sept. 1, 2021

Hi everyone. I have a little bank analysis package for my own use but having trouble displaying and storing amounts. I parse out a CSV file from the bank and convert the amounts from text to ScaledDecimal. I then store these into a STON file, which converts them back to text. I then read them in and convert them back to ScaledDecimal again. I am not used to ~Pharo have spent 24 years using VisualAge Smalltalk so I need a little bit of help because I am getting 1 Penny errors in the conversions. I can cope with this but I would like to get it right. Can anyone give me a simple means of managing, say, an amount like Â£76.49 from the bank so that it stops coming back to me as Â£76.48? David Totally Objects

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Re: uFFI: Calling conventions?
by egarrulo Aug. 30, 2021

Aug. 30, 2021

>> Yesterday we have implemented the image side part in P10 to correctly Â Â honour the calling convention. Does this imply that uFFI doesn't work correctly on current images? Because uFFI should have been available since Pharo 8, according to the uFFI manual.Â Or is it a revamped implementation? >> On the other hand, you are asking about ThisCall. This calling Â Â conventionis only relevant in 32bits systems. What is your target Â Â system/library? Does it not exist as 64-bit library? Unfortunately it is a legacy library with no 64 bit version. No problem, because I can write a wrapper, yet I was wondering if Pharo offered any facilities to avoid that. Thank you for the information. ---------------------------------------------------------------------- > Message: 1 > Date: Thu, 26 Aug 2021 15:38:48 +0200 > From: "tesonep(a)gmail.com" <tesonep(a)gmail.com> > Subject: [Pharo-users] Re: uFFI: Calling conventions? > To: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > Message-ID: > <CAM9-ED+DYAJdOF0GfBcypmV9cQqufmSzUmC51EaLRzS2ycsPWQ(a)mail.gmail.com> > Content-Type: multipart/alternative; > boundary="0000000000004711e205ca767def" > > Hi All, > The answer is yes and no. > Let's go step by step. > To declare the calling convention a class can override the method > #ffiCallingConvention. Returning a Symbol representing the Calling > Convention. > > Yesterday we have implemented the image side part in P10 to correctly > honour the calling convention. > I have implemented it for X86 but this can be easily extended to ARM32 > (ARM64 has a single calling convention). > If this fix is useful, it can be backported to P9. > > However, this only works for X86_64 as it depends on the new FFI > implementation. We still do not have an X86 32 bits VM, it is possible to > compile it from sources, but we are not distributing it. > > In X86_64 only exists the Windows and the GNU calling convention, we are > supporting both. > > On the other hand, you are asking about ThisCall. This calling convention > is only relevant in 32bits systems. What is your target system/library? > Does it not exist as 64-bit library? > > Thanks > > On Tue, Aug 24, 2021 at 9:33 PM egarrulo <egarrulo(a)gmail.com> wrote: > >> Hi all, >> >> I haven't found any information on calling conventions in the "Unified >> FFI - Calling Foreign Functions from Pharo" manual. What conventions are >> available, please? >> >> If the ThisCall[1] convention isn't supported, could it be implemented >> in code with some boilerplate? >> >> Thank you. >> >> -- >> >> [1] ThisCall works like StdCall, but the first parameter - the "this" >> pointer - is passed via the ECX register. >> >>

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Using new VM but can't find any log files
by David Pennington Aug. 28, 2021

Aug. 28, 2021

Hi there. I have installed the new M1 VM that supposedly gives much better information into a log file. However, my image is still disappearing such that it now doesnât last more than 12 hours before going. I have searched for these log files but I canât find any. Can anyone help me in this as I am close the throwing this all into the bin if I canât keep my simple web site going regularly. My clients are not happy, as you can imagine and telling me to just go with a Blogger blog! I donât want to do that so can anyone help? David

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uFFI: Calling conventions?
by egarrulo Aug. 26, 2021

Aug. 26, 2021

Hi all, I haven't found any information on calling conventions in the "Unified FFI - Calling Foreign Functions from Pharo" manual. What conventions are available, please? If the ThisCall[1] convention isn't supported, could it be implemented in code with some boilerplate? Thank you. -- [1] ThisCall works like StdCall, but the first parameter - the "this" pointer - is passed via the ECX register.

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Private Methods
by Craig Johnson Aug. 23, 2021

Aug. 23, 2021

Hi All, Just a newb off-the-wall question. Is there any good reason why we can't create a true private method in a Pharo class by putting that method inside an instance or class variable as a lambda (block). This would reduce one of my biggest bugbears with Pharo, namely the pollution of the global namespace with every single message name in the entire system. Craig

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[ANN] Stargate v6.1.1 [v6.1.1] released!
by Buenos Aires Smalltalk Aug. 20, 2021

Aug. 20, 2021

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UK Smalltalk User Group Meeting - Wednesday, August 25th
by Giovanni Corriga Aug. 16, 2021

Aug. 16, 2021

The next meeting of the UK Smalltalk User Group will be on Wednesday, August 25th. Marcus Denker will talk about Variables in Pharo. We like to say that âEverything is an Objectâ in Smalltalk. This is true in many cases: Classes, methods, even the execution stack are reflectively available as objects. This talk shows how this idea can be extended to Variables and how Pharo implements first-class Variables for Globals, instance Variables, Class Variables, and even temporary variables. This presentation explores the Variable hierarchy, shows how variables simplify the compiler and how the reflective API provided by variables is used by the debugger. In a hands-on tutorial, we extend the language by defining new kinds of Variables. Marcus ( https://marcusdenker.de/ ) is a permanent researcher at INRIA Lille - Nord Europe ( http://www.inria.fr/lille/ ). Before, he was a postdoc at the PLEIAD lab/DCC University of Chile and the Software Composition Group, University of Bern. His research focuses on reflection and meta-programming for dynamic languages. Marcus Denker received a PhD in Computer Science from the University of Bern/Switzerland in 2008 and a Dipl.-Inform. (MSc) from the University of Karlsruhe/Germany in 2004. He co-founded Zweidenker GmbH ( https://zweidenker.de/ ) in 2009. 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/cbklbrycclbhc/ ) to receive the meeting details. Donât forget to bring your laptop and drinks!

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File-in Issue - Pharo 9
by Craig Johnson Aug. 16, 2021

Aug. 16, 2021

Hi All, I just filed-out a small project that I playing with, and refreshed the image.Â The new image cannot file-in the package from the File Browser. "Instance of RubSmalltalkEditor did not understand #fileItIn". Is there another way to file-in the package? Thanks Craig

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Re: Exercism v3 problems
by Roelof Wobben Aug. 16, 2021

Aug. 16, 2021

I understand. Hopefully someone can and is willing to help me and we can give the user the experience he/she needs. I think that what you have said earlier, could be very in hand. That Syunit could be working standalone. > Op 15 augustus 2021 om 23:16 schreef "stephane.ducasse(a)free.fr" <stephane.ducasse(a)free.fr>: > > > Thanks for the info. > > I read a bit the âspecâ > I do not really get the test method cannot be passed? Anywayâ¦. > > > This is the body of the command that is being tested. For example, the following Ruby test: > > def test_duplicate_items_uniqs_list > cart = ShoppingCart.new > cart.add(:STARIC) > cart.add(:MEDNEW) > cart.add(:MEDNEW) > assert_equal 'Newspaper, Rice', cart.items_list > end > should return a test_code value of: > > "cart = ShoppingCart.new > cart.add(:STARIC) > cart.add(:MEDNEW) > cart.add(:MEDNEW) > assert_equal 'Newspaper, Rice', cart.items_list" > Looking at the other implementation can help. > > https://github.com/exercism?q=-test-runner > > Now my plate is more than full. So I cannot really help because I have too many things unfinished and that should be done. > > S > > > > On 15 Aug 2021, at 21:02, Roelof Wobben <r.wobben(a)home.nl> wrote: > > > > Yep, > > > > The spec and other information can be found here : https://github.com/exercism/docs/blob/main/building/tooling/test-runners/in… <https://github.com/exercism/docs/blob/main/building/tooling/test-runners/in…> > > > > I hoping we can get number 2 or 3 working. > > > > Roelof > > > > > > > > Op 15-8-2021 om 15:15 schreef stephane.ducasse(a)free.fr <mailto:stephane.ducasse@free.fr>: > >> > >>> Yes, > >>> > >>> There are already some test which are written with Sunit from v2 challenges. > >>> and for the new one I could write the tests. > >>> > >>> But what I mean is that exercismv 3 wants that the code written by a student is submitted and that then the tests are run and a json file with if a test is successfull or with the tests errors is made. > >> > >> We do that for our server (not Json). > >> Do you have a spec of what should be the output? > >> It could be occasion for us to extract a runner and strengthen the logic of the test execution. > >> S > >> > >>> > >>> On v2 the tests were on the same image as the code written by a student. > >>> > >>> Roelof > >>> > >>> > >>> > >>> Op 13-8-2021 om 22:14 schreef stephane.ducasse(a)free.fr <mailto:stephane.ducasse@free.fr>: > >>>> Hi > >>>> > >>>>> As far as I see it standalone means work without a image. > >>>>> all the other test-runners run in a vm as far as I know how exercism works. > >>>> > >>>> Nope. :) > >>>> You see in ruby or python or Javascript, you cannot run a software without a kernel (and a kernek is an image that cannot be saved and it often created > >>>> using some hardcoded C code - but this is the same). They just cannot save the kernel once loaded with libraries but this is the same. > >>>> > >>>> So if we can load tests and execute tests without clicking on a button interactively. > >>>> Yes we can. > >>>> > >>>> This is what we are doing since we have the jenkins test runner (since 2009 or before) and this is what you have when you > >>>> run tests on travis or github actions. > >>>> > >>>> So now the point is to know if their infrastructure needs a script to run the tests > >>>> - how to identify them > >>>> - how to execute them > >>>> > >>>> Because in Pharo we can write tests, identify them and execute them > >>>> Interactively but also from the command-line. > >>>> > >>>> Did you already write a test? > >>>> Because if not, it super super important and I will release some a booklet on Testing in Pharo. > >>>> and also a new chapter ofr Pharo by example 9 > >>>> > >>>> https://pharoweekly.wordpress.com/2021/08/04/ann-chapter-sunit-of-pharo-9-b… <https://pharoweekly.wordpress.com/2021/08/04/ann-chapter-sunit-of-pharo-9-b…> > >>>> > >>>> S > >>>> > >>>>> > >>>>> Roelof > >>>>> > >>>>> > >>>>> > >>>>> Op 13-8-2021 om 21:50 schreef stephane.ducasse(a)free.fr <mailto:stephane.ducasse@free.fr>: > >>>>>> Hello > >>>>>> > >>>>>> Can you be more specific because Pharo got since day 0 (and I would say even before) a test runner? > >>>>>> The SUnit framework is there already. > >>>>>> We were thinking to extract a runner object to make it first class from the core framework. > >>>>>> But beside that it is working, maintained, extended (now we have parametrised tests) and we have (I should publish it) supports for example (tests without setUp) > >>>>>> > >>>>>> Then what is standalone? > >>>>>> > >>>>>> S. > >>>>>>> > >>>>>>> Hello, > >>>>>>> > >>>>>>> > >>>>>>> For the new version of exercism which is due in a few weeks, the pharo track needs a test-runner, > >>>>>>> > >>>>>>> a example of that can be found here : https://github.com/exercism/ruby-test-runner/tree/main/lib <https://github.com/exercism/ruby-test-runner/tree/main/lib> <https://github.com/exercism/ruby-test-runner/tree/main/lib <https://github.com/exercism/ruby-test-runner/tree/main/lib>> > >>>>>>> > >>>>>>> > >>>>>>> first question : Can this be easily be done in pharo? > >>>>>>> > >>>>>>> second question : can it also be standalone? > >>>>>>> > >>>>>>> > >>>>>>> Regards, > >>>>>>> > >>>>>>> > >>>>>>> Roelof > >>>> > >>> > >> > >> > > >

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Re: Exercism v3 problems
by Roelof Wobben Aug. 15, 2021

Aug. 15, 2021

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ABBench: Lightweight Microbenchmarking Library
by Evan Donahue Aug. 15, 2021

Aug. 15, 2021

Hello, I've just released a utility I've been using for the past few years to help optimize Pharo code. It's a library that makes it easy to check whether an optimization has improved performance by wrapping the optimization and the old code in an if block and executing the optimized and unoptimized paths repeatedly under the same runtime conditions to determine which is faster. Basic usage is to wrap changes to the code in if blocks like so: ABBench a: [ ...existing code...] b: [...optimized code...] And then run the A/B test by printing: ABBench bench: [...some main method...] I have found it to make performance testing simple and quick enough that I actually do it. Perhaps someone else will find it useful. Install with: Metacello new githubUser: 'emdonahue' project: 'ABBench' commitish: 'master' path: ''; baseline: 'ABBench'; load. More details can be found here: https://github.com/emdonahue/ABBench Cheers, Evan

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Pharo-SQLite3: closing connections immediately and deleting the database file
by vinref＠gmail.com Aug. 13, 2021

Aug. 13, 2021

Hi I like to develop my db schema as I develop the code - TDD-style. So I need to keep dropping the database each and every time I need to update the schema and rerun the code. The problem is that even though I close the connection using #ensure: the reference remains and I cannot delete the database file immediately. ``` buildSchema ``` ``` | fp | ``` ``` ``` ``` (fp := self dbFilePath asFileReference) exists ``` ``` ifTrue: [ fp delete ]. ``` ``` ``` ``` [ ``` ``` self db beginTransaction. ``` ``` self writeSchema; writeData. ``` ``` self db commitTransaction ] ensure: [ self cleanUp ] ``` I even tried running this before everything else to no avail: ``` SQLite3Connection allInstancesDo: [ :each | each close ]. ``` ``` SmalltalkImage cleanUp. ``` ``` SmalltalkImage current garbageCollect. ``` I keep getting a #CannotDeleteFileException because there is still a reference to the database file. If I do wait a seemingly random amount of time, the reference is cleared. How can I get the VM to release the reference to the database file immediately? Pharo 8/64-bit, Windows 10 Regards, Vince

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Exercism v3 problems
by r.wobben＠home.nl Aug. 10, 2021

Aug. 10, 2021

Hello, For the new version of exercism which is due in a few weeks, the pharo track needs a test-runner, a example of that can be found here : https://github.com/exercism/ruby-test-runner/tree/main/lib first question : Can this be easily be done in pharo? second question : can it also be standalone? Regards, Roelof

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Logging Frameworks
by Esteban Maringolo Aug. 9, 2021

Aug. 9, 2021

What are the current options for logging? Beacon seems to be the most modern one, but the Github repository doesn't seem very active (maybe it forked somewhere else). Given that the logs might come from different worker images, is there something that can work via HTTP or similar? (it is, forwarding the logged events to a server). Regards! ps: I think I've asked this before, but couldn't find my previous question about it. Esteban A. Maringolo

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Introducing new feature dataTypes for the PolyMath/DataFrame project
by Balaji G Aug. 9, 2021

Aug. 9, 2021

Hello Everyone, I have been working on the addition of a new feature, DataFrame >> dataTypes, which briefs us about the data type of columns in dataframes we work on. Summarising a dataset is really important during the initial stage of any Data Science and Machine Learning tasks. Knowing the data type of the attribute is one major thing to begin with. I have tried to work with some sample datasets for a clear understanding of this new feature. Please go through the following blog post. Any kind of suggestion or feedback is welcome. Link to the Post : https://balaji612141526.wordpress.com/2021/08/06/introducing-new-feature-in… Previous discussions can be found here : https://lists.pharo.org/empathy/thread/BFOHPRUU72MDYVTJP3YV2DQ5LAZHXELE and here : https://lists.pharo.org/empathy/thread/JZXKXGHSURC3DCDA2NXA7KDWZ2EINAZ5 Cheers Balaji G

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[ANN] Pharo 9 released!
by Esteban Lorenzano Aug. 5, 2021

Aug. 5, 2021

Dear World and dynamic language lovers: The time has come for Pharo 9 (https://pharo.org/) ! Pharo is a pure object-oriented programming language and a powerful environment, focused on simplicity and immediate feedback. Here are the key features of Pharo 9: Full redesign of the Spec UI framework (new logic, application, style, GTK3 back-end) New tools: new playground, new object centric inspector, new object centric debugger. better and new Refactorings class comments are now written in Microdown format (Markdown compatible) classes now can be defined using a "fluid" api (Preview) New completion framework that adapts better to edition contexts and is customizable Fast universal non-blocking FFI which now uses libFFI as backend. Pharo now supports Windows, OSX, Linux (Ubuntu, Debian, Fedora, openSUSE, Arch, Raspbian) and multiple architectures (Intel/ARM 32/64bits). Virtual Machine Idle VM Support for ARM 64bits Support for Apple M1 More than 3000 tests Built for Ubuntu 18.04, 19.04, 20.04, 21.04, 21.10; Debian 9, 10, Testing; Fedora 32, 32, 34; openSUSE 15.1, 15.2, Tumbleweed; Manjaro; Arch Uses SDL 2.0 as back-end by default. It supports extended event handling, including trackpad support. General speed up due to compiler optimisations and UI simplification. And many, many more tests. These are just the more prominent highlights, but the details are just as important. We have closed a massive amount of issues: around 1400 issues and 2150 pull requests. A more extended changelog can be found at https://github.com/pharo-project/pharo-changelogs/blob/master/Pharo90Change…. While the technical improvements are significant, still the most impressive fact is that the new code that got in the main Pharo 9 image was contributed by more than 90 people. Pharo is more than code. It is an exciting project involving a great community. We thank all the contributors to this release: Aaron Bieber, Ackerley Tng, Alban Benmouffek, Ale Cossio, Alexandre Bergel, Alistair Grant, Allex Oliveira, Angela Chia-Ling, Arturo Zambrano, Asbathou Biyalou-Sama, Ben Coman, Benoit Verhaegue, Carlo Teixeira, Carlos Lopez, Carolina Hernandez, Charles A. Monteiro, Christoph Thiede, Christophe Demarey, Clotilde Toullec, Cyril Ferlicot, Damien Pollet, Daniel Aparicio, David Bajger, David SÃ¡nchez i Gregori, Denis Kudriashov, Ellis Harris, Eric Brandwein, Eric Gade, Erik Stel, ErikOnBike, Esteban Lorenzano, Esteban Villalobos, Evelyn Cusi Lopez, Evelyn Cusi Lopez, Ewan Dawson, Francis Pineda, Francis Pineda, Gabriel Omar Cotelli, Geraldine Galindo, Giovanni Corriga, Guille Polito, Himanshu jld, Johan Brichau, Jonathan van Alteren, Jordan Montt, Julien Delplanque, Kamil Kukura, Kasper Ãsterbye, Kurt Kilpela, Laurine Dargaud, Marco Rimoldi, Marcus Denker, Martin Dias, Martin McClure, Massimo Nocentini, Max Leske, Maximilian Ignacio Willembrinck Santander, Milton Mamani Torres, Moussa Saker, Myroslava Romaniuk, Nicolas Anquetil, Norbert Hartl, Nour Djihan, Oleksandr Zaitsev, Pablo SÃ¡nchez RodrÃguez, Pablo Tesone, Pavel Krivanek, Philippe Lesueur, Pierre Misse, Rakshit P., Rob Sayers, Roland Bernard, Ronie Salgado, Sean DeNigris, Sebastian Jordan MontaÃ±o, Serge Stinckwich, Stephan Eggermont, Steven Costiou, StÃ©phane Ducasse, Sven Van Caekenberghe, Thomas Dupriez, ThÃ©o Lanord, ThÃ©o Rogliano, Todd Blanchard, Torsten Bergmann, Vincent Blondeau, WÃ©slleymberg Lisboa. (If you contributed with Pharo 9 development in any way and we missed your name, please send us an email and we will add you). Enjoy! The Pharo Team Try Pharo: http://pharo.org/download (https://pharo.org/download) Learn Pharo: http://pharo.org/documentation (https://pharo.org/documentation)

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Is BuildingApplicationWithSpec2 project dead?
by tau Aug. 4, 2021

Aug. 4, 2021

Hi . I'm talking about the Spec2 book located at https://github.com/SquareBracketAssociates/BuildingApplicationWithSpec2 . This book was really helpful to get me started with building GUI . However, it is obviously incomplete and there is a message from a maintainer (StÃ©phane Ducasse) inside the book stating that he'll stop working on it. Moreover, pull requests from Stephan Eggermont and rvillemeur have been waiting since last year. So, Is this book project dead and what are the alternatives? Regards.

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mongo code triggered #maxExternalSemaphores: on image restart
by Yanni Chiu Aug. 4, 2021

Aug. 4, 2021

I had a problem where my image became unusable a few seconds after starting up. I got help on the database discord channel, and got my image back to usable. Hereâs a summary. [MacOS, Pharo9, MongoTalk 1.24, the image runs a Seaside,Voyage,Mongo app]. 1. I got the stack trace (see attached) a few seconds after image startup, then the image became unusable and had to be terminated from the OS. 2. I eventually figured out that I needed to re-establish the ssh tunnel to my mongo database. After that, I was able to start the image without problem. 3. A potential fix may have been in MongoTalk 1.25, where connections were being leaked due to non-local returns. The fix (see attached) would add an ensure: block. I filed-in the fix, which I was able to do, with the ssh tunnel on. 4. I turned off the ssh tunnel, then tried to start the image with the MongoTalk change installed and saved. But I still got the debugger after a few seconds. I eventually noticed that the image was still usable, if I just closed the debugger (actually, closed it two times, because it came up again). In the Transcript was: WARNING: Had to GC to make room for more external objects. If this happens often, it would be a good idea to either: - Raise the maxExternalSemaphores size. - Write your code to explicitly release them rather than wait for finalization. WARNING: Had to increase size of semaphore signal handling table due to many external objects concurrently in use You should increase this size at startup using #maxExternalSemaphoresSilently: Current table size: 1024 WARNING: Had to increase size of semaphore signal handling table due to many external objects concurrently in use You should increase this size at startup using #maxExternalSemaphoresSilently: Current table size: 2048 So the MongoTalk fix would have salvaged the image too. 5. Digging around, I found the following would clean things up: MongoMonitor allInstances. "size: 95" MongoMonitor allInstancesDo: [ :each | each stop; tearDown ]. Smalltalk garbageCollect. MongoMonitor allInstances. "size: 6â After that, the pharo CPU usage went down from 23% to 5% Cheers, Yanni Chiu

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Facing a very strange Issue while creating a Pull Request
by Balaji G Aug. 3, 2021

Aug. 3, 2021

Hello Everyone, I have been working in Pharo for the PolyMath/DataFrame project for around 4 months now. There has been an issue with every PR I try to make.I did not pay enough attention to it at the beginning, but it is making it hard for the maintainers of the project to review my PR. The problem is that Github shows more number of files changed than actual changed, I actually made changes in 2 files but total files changed in Github shows 8, while I did not even touch the remaining files.but the code is the same and it is removed and added in remaining files which is super strange. I am using Windows 10 Operating System with 8GB Ram and 512 GB SSD, Intel core 13 10th Generation. I tried the following to solve the issue but failed: 1) Uninstalled Pharo Launcher and re-installed it again. Even deleted every image and started everything fresh again. 2) Created a new Github account only for this problem, forked a fresh copy there, but did not help. 3) Tried Linux Mint Operating System and did the same. While the first PR through Linux (where I added just a test method) worked, I started facing the same problem later on. 4) I also somehow managed to grab a Mac OS High Sierra and installed Pharo, did the same. But no change. 5) I thought this could be due to CRLF to LF changes, which is common when switching Operating Systems, like End of the file, end of the line, tabs being converted to spaces etc. But this is definitely not the case here I guess. 5) I have also tried using the SSH protocol while cloning from Github. It did not make any difference. Please take a look at this short video in order to understand this issue clearly: https://youtu.be/AEmOh1-tyA0 <https://youtu.be/AEmOh1-tyA0> . You can look at the fork: https://github.com/BalajiG1862/DataFrame. The commit Information: https://github.com/BalajiG1862/DataFrame/commit/37604091538987b3ed93c34b8ed… <https://github.com/BalajiG1862/DataFrame/commit/37604091538987b3ed93c34b8ed…> . I tried every possible way to rectify this, even bugging a few members from Pharo Community through Direct Message. I have been trying to overcome this for the past 10 days full time, and yet no single clue. I am pretty sure there is something minor that I am missing, but could not find and rectify it. Every single idea will definitely benefit me anyhow, because I have nothing more to try. Hoping for someone to actually read till here Balaji G

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