September 2019 - 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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Test method auto-generation in Calypso
by HernÃ¡n Morales Durand Feb. 1, 2020

Feb. 1, 2020

Hi, I have this idea of typing a method in a Browser and have another code area in the same browser where the method test is "automagically generated". This is, divide the current method pane in two: One for the method being written itself, and another for its test, where at least the method selector could be autogenerated by writing testXXXX Of course being able to jump to the method test would be super nice! (and with a keyboard shortcut). This reminds myself to write the method now instead of forget it forever. Any hints to make this happen in Calypso? Cheers, HernÃ¡n

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sqlite garage
by Jeff Gray Jan. 30, 2020

Jan. 30, 2020

anyone using Garage for accessing SQLite? I am using Garage for MySQL in Pharo 7 on windows and it all works seamlessly but I don't know what connection string to use to connect to a database file that I have in my pharo directory. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Pharo 6.0 and 6.1 64 bit freeze on MacMini
by Ted F.A.van Gaalen Jan. 27, 2020

Jan. 27, 2020

Hi, I reverted to 5.0 because Pharo 6.0 and 6.1 64 bit hangs on my Mac Mini with UDH 4K screen (may that has to do with?) with its maiden image (at first start after download when: I resize or go to full screen. Maybe VM problem? my mac Mini metrics: Hardware Overview: Model Name: Mac mini Model Identifier: Macmini6,2 Processor Name: Intel Core i7 Processor Speed: 2,6 GHz Number of Processors: 1 Total Number of Cores: 4 L2 Cache (per Core): 256 KB L3 Cache: 6 MB Memory: 4 GB Boot ROM Version: MM61.0106.B1F SMC Version (system): 2.8f0 maybe this problem was already reported, but could find it. Kind Regards TedvG

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Namespaces (was Re: Behold Pharo: The Modern Smalltalk)
by Ben Coman Dec. 24, 2019

Dec. 24, 2019

On Thu, Oct 12, 2017 at 8:52 PM, Sean P. DeNigris <sean(a)clipperadams.com> wrote: > horrido wrote > > Having separate namespaces would be really good. > > VisualWorks has them. Why not Pharo? > > I can't remember ever hearing disagreement on this subject. It seems the > only questions have been: 1) how to do them *right*, The default position would be leveraging someone else's experience, so this begs the question, what is wrong in namespace implementations in VW, Gemstone, Squeak (as our immediate neighbours, then plus Dolphin, SmalltalkX, other languages) Are there been any research papers around comparing these? I found the "Pharo on Gemstone VM" talk impressive. The "develop on Pharo deploy on Gemstone" philosophy seems like a nice synergy for Pharo's commercial future. So a naive approach would be to do namespaces just like Gemstone. Maybe its not the best, but would it be "good enough" -- perfection being the enemy of done and all that jazz. cheers -ben > and 2) where they fall on the endless prioritized todo list >

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Parsing in VW
by Steffen MÃ¤rcker Dec. 3, 2019

Dec. 3, 2019

Dear all, I have two questions regarding parsing frameworks. 1) Do you have any insights on the performance of SmaCC VS Xtreams Parsing VS PetitParser? 2) Has anybody started to port PetitParser 2 from Pharo to VW? Is it worth the effort? Sorry for cross-posting, I thought this might interest both communities. Cheers, Steffen

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Re: [Pharo-users] Where did all the Comments Go?
by Andrew Black Nov. 15, 2019

Nov. 15, 2019

To try and make some progress, I copied a working image from another machine. On startup (on MacOS 10.14.6) I get this walkback: File class(ProtoObject)>>primitiveFailed: File class(ProtoObject)>>primitiveFailed File class>>fileDescriptorType: File class>>fileDescriptorIsAvailable: Stdio class>>standardIOStreamNamed:forWrite: Stdio class>>stdout VTermOutputDriver class>>stdout BasicCommandLineHandler(CommandLineHandler)>>initializeStdout BasicCommandLineHandler(CommandLineHandler)>>initialize BasicCommandLineHandler>>initialize BasicCommandLineHandler class(Behavior)>>new [ self new activate ] in BasicCommandLineHandler class>>startUp: in Block: [ self new activate ] BlockClosure>>cull: WorkingSession>>executeDeferredStartupActions: WorkingSession>>runStartup: WorkingSession>>start: SessionManager>>launchSnapshot:andQuit: [ isImageStarting := self launchSnapshot: save andQuit: quit. wait signal ] in SessionManager>>snapshot:andQuit: in Block: [ isImageStarting := self launchSnapshot: save and...etc... [ self value. Processor terminateActive ] in BlockClosure>>newProcess in Block: [ self value.... > On 19 Sep 2019, at 17:43 , Andrew Black <apblack(a)pdx.edu> wrote: > > Iâm coming back to Pharo after not having used it for several months. Iâm pleased to see that Pharo 7 is now stable and that work has started on Pharo 8. > > I downloaded a new Pharo Launcher (the old one could no longer figure out which version of the VM to use), used the Launcher to create a Pharo 7.0 stable image, and started loading my packages into it from github. > > My attempt to install the baseline of my code failed when some initialization code could not get the definitionComment for my parser (which is written using SmaCC). Normally, SmaCC stores oneâs whole grammar _as a method comment_ in a method called definitionComment. Oddly, this method was empty, even though the version on disk (in the file Grace-Parser.package/GraceParser.class/class/definitionComment.st) contained the comment, as I expected. > > Hoping to at least complete the installation of my code, I manually copied the comment from this file into Calypso and saved the method. It looked fine, but as soon as I moved Calypso to another method, and then back again, the comment had disappeared. I experimented with adding comments to other methods: they looked fine, and I could save the method, but if I moved to another method and then back, the comment had disappeared. > > Class comments have also disappeared. > > I donât think that this is a Calypso problem, because the loading of code from git would not involve Calypso. Rather it is a code storage problem. I saw a File System primitive failure when I launched my new image, but ignored it; Iâm guessing that the comments disappear because they are only in the file system, whereas the code is in memory. And for some reason I canât access the sources file? The changes file ahs been created as expected. > > I just tried downloading the VM manually, and running the âstableâ image that I created, and this time got a different file system primitive failure on startup: #createDirectory in MacStore. > > Whatâs going on? Whatâs the right way to get a working Pharo in the New World Order? > > Andrew > ____________________________ Prof. Andrew P. Black Department of Computer Science Portland State University Oregon, USA http://www.cs.pdx.edu/~black Telephone: +1 503 725 2411

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Concurrency Best Practices + Tests
by Noury Bouraqadi Oct. 16, 2019

Oct. 16, 2019

Hi everyone, Can I get your input on the following questions : - What are your best practices and recommendations for developing and testing concurrent software? - How to discover need for synchronization/critical sections/ when doing TDD? - How to write code to avoid dead-locks? Noury

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OSProcess and CommandShell available on GitHub for Pharo users
by David T. Lewis Oct. 15, 2019

Oct. 15, 2019

Alistair Grant and I, with the support of Feenk, have made GitHub repositories for OSProcess and CommandShell at: https://github.com/dtlewis290/OSProcess-Tonel https://github.com/dtlewis290/CommandShell-Tonel Alistair did the conversions using Peter Uhn??k's migration tool, and I set up the repositories so that they can now be loading in Pharo as follows: Metacello new repository: 'github://dtlewis290/OSProcess-Tonel/src'; baseline: 'OSProcess'; load. Metacello new repository: 'github://dtlewis290/CommandShell-Tonel/src'; baseline: 'CommandShell'; load. Note, the two respositories are named *-Tonel because I also maintain a GitHub repository for OSProcess on Cuis, and will probably do repositories in Squot format in the future. @Thierry Goubier - If you have an account on GitHub I will add you as a collaborator (but my own development work remains on squeaksource so I prefer contributions there anyway). Enjoy, Dave and Alistair

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