- Pharo-users - lists.pharo.org

Re: [Pharo-users] Generate class hierarchy from JSON Schema
by eftomi March 12, 2020

March 12, 2020

Todd, this is great, I didn't know that you are working on ActiveRecord. BTW, I have some minor additions to SQLServerPlatform (support for National Language Character Set) and OraclePlatform (Decimal data type) - is there a central git repository for Glorp so that I could PR to? Thanks and best wishes, Tomaz -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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How to get a list of package versions?
by HernÃ¡n Morales Durand March 12, 2020

March 12, 2020

Hi there, I would like to compare two Pharo deployed images. Specifically, get a list/tree of the installed packages with their version number each one, so I can compare if there were updates between both deployments. I started by doing IceRepository registry collect: #workingCopy Then discovered the #commitish, though don't know is there another way? Cheers, HernÃ¡n

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issue with PharoLauncher
by Renaud de Villemeur March 11, 2020

March 11, 2020

Hi. Are there any recent update with PharoLauncher ? It worked fine yesterday, but today I cannot launch default 8.0 image. It fail with a debug message: Instance of ZnBufferedWriteStream did not understand #name. I'm surprised to receive such message, and can't find out what has change to get suddenly such behaviour. Pharo Launcher is the latest version: Pharo 1.9.2-2019.08.01 - This distribution was built August 01, 2019. I'm using default Pharo 8.0 VM and Image, all refreshed to their latest version. However, the launcher is working well with default Pharo 9.0 VM and Image. Here is an extract of the log (full log attached) Instance of ZnBufferedWriteStream did not understand #name 11 March 2020 10:51:09.200161 am VM: Win32 - IX86 - 10.0 - CoInterpreter VMMaker.oscog-eem.2504 uuid: a00b0fad-c04c-47a6-8a11-5dbff110ac11 JanÂ 5 2019 StackToRegisterMappingCogit VMMaker.oscog-eem.2504 uuid: a00b0fad-c04c-47a6-8a11-5dbff110ac11 JanÂ 5 2019 VM: 201901051900 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Date: Sat Jan 5 20:00:11 2019 CommitHash: 7a3c6b6 Plugins: 201901051900 https://github.com/OpenSmalltalk/opensmalltalk-vm.git Image: Pharo7.0.3 [Build information: Pharo-7.0.3+build.158.sha.0903ade8a6c96633f07e0a7f1baa9a5d48cfdf55 (32 Bit)] ZnBufferedWriteStream(Object)>>doesNotUnderstand: #name Receiver: a ZnBufferedWriteStream Arguments and temporary variables: aMessage: name exception: MessageNotUnderstood: ZnBufferedWriteStream>>name resumeValue: nil Receiver's instance variables: stream: BinaryFileStream: 'C:\Users\villemre\devzone\Pharo\images\Pharo 8.0 - 6...etc... buffer: nil position: 0 Any advice ? Thanks Renaud

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[ANN] Match Tool was successfully ported to Pharo 9
by Juan Pablo Sandoval Alcocer March 11, 2020

March 11, 2020

Dear friends, I would like to comment that Sebastian, an intern of my company, just ported the MatchTool to Pharo 9. You may find the install instructions in the following link :) https://github.com/jordanmontt/MatchTool-Spec2 Please, help us to test it, any feedback is welcome. Regards, Juan P. Sandoval http://www.semantics.bo/ https://jpsandoval.github.io/

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evaluation of the expression 7 factorial
by Rene Paul Mages (ramix) March 10, 2020

March 10, 2020

Hello, As you can see : http://ramix.org/pharo/version-8.0/7-factorial.png the result of the following evaluation is not 5040 : 7 factorial Nota Bene : my linux laptop is running the 64 bits version of Pharo 8.0.0 -- Thanks for your help. Rene Paul Mages (ramix) GnuPG key 0x9840A6F7 http://renemages.wordpress.com/smalltalk/pharo/ http://www.linux-azur.org/ramix http://blog.pharo.fr

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PBE8.0 Chapter: Syntax in a Nutshell
by ducasse March 9, 2020

March 9, 2020

Hello In case you want to help Pharo, here is attached the latest version of the Pharo by Example book chapter. The authors thanks the sponsoring of ESUG because updating a book is not just changing 5.0 into 8.0. You can send PRs at https://github.com/SquareBracketAssociates/PharoByExample80 The full pdf is available at https://github.com/SquareBracketAssociates/PharoByExample80/releases If you want to support this effort: - you can sponsor the book - you can get your logo on the book cover and be explicitly mentioned. The money will be split equally among the co-authors. - you can sponsor me directly: https://www.paypal.com/donate/?token=Uoxj9sP4_jgUc6zUmTUc0-0AHbigd2v5CM1Gqx… Stef

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Pharo 8 stability and large images
by Jimmie Houchin March 9, 2020

March 9, 2020

I am in the midst of a very long term, in my spare time, project written in Pharo 7. I have at times been very frustrated with various problems. Images becoming unstable. Images crashing. Images crashing and unopenable after crashing. With seeming loss of code not yet committed. Images very unstable with memory greater than 500mb. The larger the worse. I regularly have images that exceed 1gb. It is without effort to grow images to such size. These images would increasingly become unstable, slow and unresponsive. They frequently would crash. I would have to reopen, save or commit my code and then open a new image and import my code. So I read threads speaking about large images with great interest. However, I persisted as I have a significant amount of code dedicated to this project. Currently approximately 120 classes. Some of which are private or proprietary. Over 70 public when I have cleaned up my mess and get ready to release. And many still to be written. As I persist, I also look around at my options. There are few things I would even consider for a rewrite. I this week decided to persist in my attempt to move to Pharo 8. I generally prefer to use the latest stable. However, the first use cause an error in saving an image which I did not understand and did not persist through. Currently I name my images for this project as such SmallTrader-0.00.image as a base image setup like I want. I open up such image and "Save As" and it automatically increments to the biggest number in the folder such as SmallTrader-0.59.image. Then I update with the latest code. However Pharo 8 generated an error (#+ was sent to nil) when doing "Save As"Â from an image named SmallTrader-8.000.image. So I decided to keep on with Pharo 7. However, this week I decided not to let that stop me and I simply renamed my image to something Pharo 8 did not complain about, SmallTrader-8-00.image and it now "Save As" renames to SmallTrader-8-00.1.image. Now, I am not writing this email to complain. But rather to praise. Once I got going on Pharo 8 this week with the latest stable VM and Image, it has seemed to be very stable and solid. I just ran a backtest and had naively did not pay attention to my backtest settings. The image ran the backtest perfectly, without problem. It was stable and consistently performant. After it completed I decided to look at the OS System Monitor to check how much memory it was consuming because it had opened up 252 inspect windows with a dictionary of several thousand objects each. It was effortlessly sitting at 5.7gb and was nicely responsive in the UI. I later nil'd the object in the Playground and did a Smalltalk garbageCollect, and it shrank down to 400mb. Nice! Wow. Great job guys. I am impressed. I am exceptionally pleased. Thank you. Thank you. Thank you. This makes me less afraid to use other time series data which run up my memory greatly. I would be reading in over 2gb of csv files to create my objects to operate upon. Previously it made the image incredibly unstable and unusable. I look forward to giving it a try. I just wanted to give you guys and gals (should there be any) a tremendous thank you and praise report. I am greatly encouraged to persist in my use of Pharo. And at the same time greatly encouraged to not look elsewhere because no need. Pharo is meeting my needs with reasonable performance and stability. I look forward to being productively active using Pharo 8 and look forward to the bright future Pharo 9 and beyond hold. Thanks again for this amazing language and environment. I hope someday to be able to repay the blessing I have received from all who have contributed to what I enjoy today. Jimmie Houchin

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[ANN] We have our winners!
by Richard Kenneth Eng March 8, 2020

March 8, 2020

https://smalltalk.tech.blog/2020/03/07/jrmpc-2020-award-winners/ Time to play this up for all the PR value I can muster. Richard

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How to recover from a VM crash
by Richard Kenneth Eng March 6, 2020

March 6, 2020

I have an emergency. One of my JRMPC teams says they can't open the image. They get a long error message that begins with: *Exception code: C0000005* *Exception addr: 000000000041FB6B* *Access violation (read access) at 0000000000000007* *RAX:0000000032700000 RBX:0000000000000000 RCX:0000000000000000 RDX:0000000000000000* *RSI:000000000322f4c0 RDI:000000000322f4f0 RBP:0000000006d04a90 RSP:0000000000b8f9b0* *R8 :0000000000000001 R9 :0000000031825990 R10:0000000000000000 R11:0000000000b8f8e0* *R12:0000000020d00000 R13:feffffffffffffff R14:00ffffffffffffff R15:0000000000000000* *RIP:000000000041fb6b EFL:00010246* *FP Control: 0000037f* *FP Status: 00000000* *FP Tag: 00000000* *Crashed in the VM thread* They didn't do a backup, so have they lost their code? Is there any way to recover? Thanks, Richard

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[ANN] COVID-19 analysis in Pharo
by HernÃ¡n Morales Durand March 6, 2020

March 6, 2020

Hello, I have set up a new Pharo project for the analysis of COVID-19 outbreak: https://github.com/hernanmd/COVID-2019 Thanks to the ObjectProfile for Roassal and PolyMath contributors for the DataFrame package. Cheers, HernÃ¡n

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