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

How to handle (recover) from a ZnInvalidUTF8: Illegal continuation byte for utf-8 encoding error?
by Tim Mackinnon July 20, 2021

July 20, 2021

Hi - Iâm doing a bit of log file processing with Pharo - and Iâve hit an unexpected error and am wondering what the best way to approach it is. It seems that I have a log file that has unexpected characters, and so my readStream loop that reads lines gets an error: "ZnInvalidUTF8: Illegal continuation byte for utf-8 encodingâ. For some reason this file (unlike my others) seems to contain characters that it shouldnât - but what is the best way for me to continue processing? Should I be opening my files in a different way - or can I resume the error somehow- Iâm not familiar with this area of Pharo and am after a bit of advice. My code is like this (and I get the error when doing nextLine) parseStream: aFileStream with: aBlock | line items | [ (line := aFileStream nextLine) isNil ] whileFalse: [ items := $/ split: line. items size = 3 ifTrue: [aBlock value: items]] My stream is created like this: firmEfs := (pathName , '/' , firmName , '_files') asFileReference. details parseStream: firmEfs readStream. Should I be opening the stream a bit differently - or can I catch that encoding error and resume it with some safe character? Thanks for any help. Tim

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Pharo 9.0 vm same-as Pharo 8.0 ?
by igouy2＠yahoo.com July 20, 2021

July 20, 2021

Seems like the files from â https://files.pharo.org/get-files/90/pharo64-linux-stable.zip â are the same as Pharo 8.0 â 5\.0-202002121043 Wed Feb 12 11:06:45 UTC 2020 gcc 5.4.0 \[Production Spur 64-bit VM\] Is that as-intended?

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How to use Spec 2.0 with GTK in Pharo 9.
by jbn126859530.7 July 19, 2021

July 19, 2021

Hi. I'm learning Spec 2.0 with the help of the book "Building user interface with Spec 2.0". In section 2.17 of the book, the authors make a subclass of SpGtkConfiguration. However, no such class exists, only a SpMorphicConfiguration. Moreover, if I do something like: "app useBackend: #Gtk", I get a NotFound error. Again, "app useBackend: #Morphic" work as intended. As Pharo 9 annonced the availability of a GTK backend, I would like to know how to access it. Thanks. tau.

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Pharo 9 released - a brief experience report
by Yanni Chiu July 19, 2021

July 19, 2021

First, great work and thanks to all contributors. Using macOS Big Sur version 11.4 on MacBook Air 2019... 1. In a new sub-directory "pharo9" (I was using a pharo8 directory, so pharo9 is to keep things separate). In pharo9, I used "curl -L https://get.pharo.org/64/ | bash" to get the latest release. Then I ran ./pharo-ui to start Pharo. Very strangely, it was able to present my pharo8 images to choose for opening. I quit without choosing any image, then went looking to find out how it was able to find the settings. In the course of that, I realized the default download had got me the 8.0 release. 2. Then I used "curl https://get.pharo.org/90+wm | bash". The image came up with a strange looking dialog across the top that indicated freetype font lib's could not be loaded. I just proceeded and was able to navigate somewhat. The Settings for fonts were completely absent. I kept browsing, but more freetype font problems kept appearing. 3. I then compared the dylib's in the pharo-vm (what I had in pharo8) vs. what I just got in pharo9 - very different lists. I copied the libfreetype.6.dylib, libfreetype.dylib, and libFT2Plugin.dylib files to the new vm, and then the Pharo9 image came up nicely. 4. I thought I was home free, and continued browsing. I happened to look at the Pillar-Core code, and I got "Cannot locate libcairo.2.dylib". Browsing a few other places did not show this problem. That's it for now. I will try a bit more later, but I'm going back to Pharo8 for today. Yanni Chiu

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leave
by cedalion July 18, 2021

July 18, 2021

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UK Smalltalk User Group Meeting - Wednesday 28th July 2021
by Giovanni Corriga July 16, 2021

July 16, 2021

The next meeting of the UK Smalltalk User Group will be on Wednesday, July 30th. Russell Allen will talk to us about Self ( https://selflanguage.org/ ). Dating back to the late 1980s, Self is a prototype based programming language and environment in the broader Smalltalk family. Although Self has always been a niche research system, its influence can still be seen in areas as diverse as the fast VMs of Java and Javascript, in the prototype semantics of Javascript, and in the Morphic user interface used by Squeak, Pharo and Cuis. Russell Allen ( https://twitter.com/russell_allen_ ) has a background in law and computers and first came across Self in the late 1990s. Around 2008 he helped get Self running on Linux x86, set up the Self website and GitHub account, and for the last decade or so he has been helping keep Self as a project alive. In this talk, Russell will demonstrate Self as a running system, including the object semantics, language, and the multi-user Morphic development environment. heâll talk about the current status of the project and the challenges it faces for the future. Given the current COVID-19 restrictions, this will be an online meeting from home. Please note that the meeting will start later than usual, to accomodate the speaker who will connect from Australia. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/UKSTUG/events/cbklbrycckblc/ ) to receive the meeting details. Donât forget to bring your laptop and drinks!

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[ANN] Superluminal v2.2.0 [v2.2.0] released!
by Buenos Aires Smalltalk July 14, 2021

July 14, 2021

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Mailing list web forum seems to be broken
by Kenneth Payne July 13, 2021

July 13, 2021

Hi For some time now the forum on http://forum.world.st/Pharo-f1294836.html has not been working properly. Messages to this list are showing up in my mailbox but not on the website. Is someone looking at this? it's not a good look for the pharo community. Ken

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Flattening traits
by Esteban Maringolo July 13, 2021

July 13, 2021

Hi, What is the way, ideally programmatic, to flatten traits into regular methods of their user classes? I remember there was an option in the UI, but I couldn't find it, and there is nothing about it in the general documentation [1]. Thanks! [1] https://github.com/pharo-open-documentation/pharo-wiki/blob/master/General/… Esteban A. Maringolo

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Re: Size of the critic panel in Calypso
by Yanni Chiu July 11, 2021

July 11, 2021

With the hint, I found ClyCriticDecorator>>showCritiques where I changed the two 0.8 factors to 0.9. It would be better to specify the number of lines, but this is good enough. Iâd searched the settings several times, at various times but had pretty much given up. Yanni Chiu

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Re: Size of the critic panel in Calypso
by Davide Varvello July 9, 2021

July 9, 2021

Hi Alexandre,Yep but I don't want to get rid of it, in my opinion it is useful. I need to resize it Anyone with the solution? :-) CheersDavide On Friday, July 9, 2021, 01:58:57 PM GMT+2, Alexandre Bergel <alexandre.bergel(a)me.com> wrote: No idea. But, the way to remove it is by evaluating: ClyCriticBrowserPlugin disable. Maybe you can trace it to see how the panel size is set. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre BergelÂ http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On 9 Jul 2021, at 12:07, Davide Varvello via Pharo-users <pharo-users(a)lists.pharo.org> wrote: > > Hi Guys, > How can I reduce the height of the critic panel in Calypso? I don't want to get rid of it. > TIA > Davide

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Size of the critic panel in Calypso
by Davide Varvello July 9, 2021

July 9, 2021

Hi Guys,Â How can I reduce the height of the critic panel in Calypso? I don't want to get rid of it.Â TIAÂ Davide

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Process with higher priority then Processor timing priority
by mspgate＠gmail.com July 6, 2021

July 6, 2021

Hello everybody, in my liveCoding package for Pharo I am sending out many OSC messages with a very tight timing within a Process. It works all fine if I donât interact too much with the Pharo playground (for example highliting code or scrolling down). my question is, can my Process have an absolute priority? peace. d

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Question about Spec2 and SpTablePresenter
by Mark O'Donoghue July 5, 2021

July 5, 2021

Howdy all Iâve got stuck trying to manage Tables â over 12 hours now and Iâm out of ideas!. â¹ Any observations / suggestions are most welcomeâ¦ Iâve been loading small external files of transactions using NeoCSV into Spec2 tables. I am trying to use Fuel to persist the table contents so that my application will re-load the working state from where I finished in the last session. (Iâve opted for Fuel as a simple alternative to having to do the whole object relational mapping thing.) The idea is that transactions (and potentially some manual adjustments) will be processed over time. (This is preferable to having to reload all files from the beginning evert time I run the applicationâ¦) The Spec2 tables have been working well until I tried to persist them. I canât seem to fully re-load them to a previously saved state. For example - I can restore the essential contents of my table in most circumstances using: restoreObjects âfilePresenter1 is a SpTablePresenterâ | objects savedEntry | objects := CpPersist restoreObjectsFromFileNamed: 'E:\Me\zzzST-Test\demo.fuel'. recentFileList := objects at: 1. currFileFilter := objects at: 2. savedEntry := objects at: 3. self updateFilterButton: currFileFilter. filteredFileList := self filterFilesUsing: currFileFilter. filePresenter1 items: filteredFileList. savedEntry ifNotNil: [filePresenter1 selectItem: savedEntry ]. However, if any of the table columns are re-sorted , the re-load operation gets confused and I canât get the saved a saved selected item to become selected again. (It seems to be confusing the index numbers of the sorted and unsorted lists â even when I match by contents rather than index.) (I also created an equality test to ensure equivalent entries are recognised by the #= operation in the list of the underlying model ). This all works fine - unless I sort a column! Since this approach was going to be used on several screens Iâd really like to find a solution. Cheers Mark Perth, Western Australia

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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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