January 2016 - Pharo-users - lists.pharo.org

Working with a compressed Fuel file?
by Stephan Eggermont Jan. 15, 2016

Jan. 15, 2016

I'm trying to work with a compressed Fuel file, without having to expand everything at the same time. It looks like not all streams are created equally. I seem to need a File instead of a FileReference: saveToFile |zipStream fileRef| fileRef := File named: (FileSystem disk workingDirectory / (self fileName, '.zip')) pathString. fileRef writeStreamDo: [ :s | zipStream := GZipWriteStream on: s. repository := nil. FLSerializer serialize: self on: zipStream. zipStream close]. And materializing doesn't like this stream from: aFileName |zipStream fileRef theNew| fileRef := File named: aFileName. fileRef readStreamDo: [ :s | zipStream := GZipReadStream on: s. theNew := (FLMaterializer new materializeFrom: zipStream) root. zipStream close]. ^theNew How am I supposed to work with compressed Fuel files? Stephan

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A Turing Machine simulator written in Pharo
by Julien Delplanque Jan. 14, 2016

Jan. 14, 2016

Hey everyone, I had a course named "Calculabilty and Complexity" last year and I implemented a Turing Machine simulator using Pharo just to see how easy/hard it would be (it was quite easy :) ). I also wrote a little thing on medium about it [1] (I just took half an hour to review it and I thought it was time to publish it). Just announcing it in case it case someone need/is interested by this. There is also a github repository for the source code [2]. Julien [1]: https://medium.com/@juliendelplanque/a-turing-machine-simulator-written-in-… [2]: https://github.com/juliendelplanque/turing-machine

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I am David Allouche, let me introduce myself.
by David Allouche Jan. 14, 2016

Jan. 14, 2016

Hello folks. Some people have already seen me on Twitter and Slack, but I believe there might be some people on the mailing list that did not see those conversations. As I have done on Slack, I am writing this introduction so people have an idea where I come from and what is my business with Pharo. I am a professional programmer. My current job is tech on a small company I run with two associates (by the way, we are hiring a good Python web dev with a passion for good code). The product is a SaaS web application for recruiters. They call that an Application Tracking System, it is a workflow, communication and archival system for job applications and candidates. I started programming 25 years ago with HyperCard, and since I have at least played with Pascal, C, Prograph, asm68k, HP-48 (RPL, Saturn asm), Java, bash, C++, LaTeX, XSLT, Delphi, Scheme, elisp, JavaScript. I have contributed to GNU TeXmacs where I made important contributinos during about 2 years, as I completed by training as an software engineer, and worked at CNRS in Rennes. Then I got involved in GNU Arch (wrote a Python driver), Bazaar (bzr scm) where I worked with the founding team at Canonical while working on the version control aspect of launchpad.net <http://launchpad.net/>. After that, I had mostly no contribution to free software, working on financial modeling at a bank and then on my current business. I made a presentation on SQLAlchemy at PyCon.fr <http://pycon.fr/> 2015. I am a fan Design Patterns (GoF) and the Refactoring book. My mentor at Canonical (Robert Collins) is heavily influenced by Smalltalk and championed XP there. I always had strong interests in software systems design, programming language design, typography, and user interface design. I feel strongly for the concept of software craftsmanship. My current job is nice, good pay, lots of independence ; after 6 years working on the same project, I need some fresh intellectual stimulation. And I was recently impressed by the presentation "Nothing is Something", by Sandi Metz, who is heavily influenced by Smalltalk. http://confreaks.tv/videos/bathruby2015-nothing-is-something <http://confreaks.tv/videos/bathruby2015-nothing-is-something> So, I here I came, bumbling my way around the system, looking for intellectual stimulation, and for a way to make a positive contribution. I was very impressed by the nice welcome I have received. And I see there is lots of useful work to do here. So that's where I come from when you see me chipping in the conversation here. Regards.

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Slow object printOn: with EURO symbol
by Hilaire Jan. 14, 2016

Jan. 14, 2016

Hello, With Pharo3, in an object of mine, I want its text representation to come with the EURO symbol: CGMoney>>printOn: aStream aStream << (amount asScaledDecimal: 2) greaseString << ' ' << 'â¬' It appears to be very slow when I browse such collection of objects (says 1500) from an inspector Replacing 'â¬' by 'EUR' gives back normal rendering time. Indeed the 'â¬' is encoded as WideString, so not sure what is happening. All content converted to WideString or what? The issue was discussed in the Seaside mailing list and different suggestions raised as well benchmarks exposing the issue: http://forum.world.st/TableReport-slow-down-tp4868925.html I tested these benchs en Pharo 3 and 4 and the performance diagnostics are the same. There are matching reports to some extent: https://pharo.fogbugz.com/f/cases/6639/Buffered-Text-Converters https://pharo.fogbugz.com/f/cases/14279/EyeInspector-very-slow-on-WideString https://pharo.fogbugz.com/f/cases/10868/Slow-UTF8-decoding Nevertheless, the problem of the performance remains. Thanks Hilaire -- Dr. Geo http://drgeo.eu http://google.com/+DrgeoEu

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Launcher 0.2.9 opens Spur images
by Damien Cassou Jan. 14, 2016

Jan. 14, 2016

Hi list, thanks to the awesome work of Vincent Blondeau, Stephan Eggermont and Cyril Ferlicot, Pharo Launcher 0.2.9 can be configured to open both spur and pre-spur Pharo images. You can download this version from http://www.smalltalkhub.com/#!/~Pharo/PharoLauncher. You can safely replace your existing Launcher installation with the new one. Your images won't be affected and you will still be able to launch them. The VM coming with these builds is a pre-spur VM because Launcher is based on Pharo 4. If you want to launch Pharo 5 spur images, you need to separately download a Pharo 5 Spur VM from http://get.pharo.org/vm50 and configure the location of this VM in the Launcher settings (icon at the bottom left of the Launcher window). What I like about this release is that I didn't do anything but changing the version number in https://ci.inria.fr/pharo/view/all/job/Launcher :-). -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." --Winston Churchill

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Understanding the role of the sources file
by Dimitris Chloupis Jan. 13, 2016

Jan. 13, 2016

I was adding a short description to the UPBE about sources file , I always thought that the sources file is the file that contains the source code of the image because the image file itself stores only the bytecode. However its just came to my attention that the sources file does not contain code that is recently installed in the image. So how exactly the sources file works and what it is ?

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Failling Tests are green if BlockCannotReturn exception
by abdelghani ALIDRA Jan. 13, 2016

Jan. 13, 2016

Hi, I observed this unexpected behavior in test classes.In a test class define a method : testBlock Â Â Â |aBlock| Â Â Â aBlock := [ ^1 ]. Â Â Â aBlock value. Â Â Â self assert: false. Althought the assertion is false at the end of the test, the test is green.Actually, It does not matter what you put after aBlock value, the test always succedes (I tried to put a self halt, it does not execute) I tried this both in Pharo 4 and 5 under Windows and MacOS. Any ideas? Cheers Abdelghani

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When Pharo 5 is to be released as stable ?
by Dimitris Chloupis Jan. 12, 2016

Jan. 12, 2016

I am curious when is Pharo 5 is to be released as stable and move to Pharo 6 , any idea ?

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Job offer
by stepharo Jan. 12, 2016

Jan. 12, 2016

Begin forwarded message: From: Georg Heeg <georg(a)heeg.de> Subject: [Esug-list] Looking for Smalltalkers Date: 12 Jan 2016 17:57:27 GMT+1 To: ESUG Mailing list <esug-list(a)lists.esug.org> A customer of ours is looking for two Smalltalkers starting not later as July 1st, 2016, unlimited work contracts. Please contact me for details Georg Heeg Georg Heeg eK, Dortmund und KÃ¶then, HR Dortmund A 12812 Baroper Str. 337, 44227 Dortmund, Germany Tel. +49-3496-214328, Fax +49-231-97599-20 _______________________________________________ Esug-list mailing list Esug-list(a)lists.esug.org http://lists.esug.org/mailman/listinfo/esug-list_lists.esug.org

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[Survey] Forking Operating System Proces in Pharo
by Mariano Martinez Peck Jan. 12, 2016

Jan. 12, 2016

Dear all, As I mentioned in the thread "Pharo Consortium Sponsored Development Effort" [1] I built a survey about Forking Operating System Processes in Pharo. The idea of the survey is simple: I want to understand what people needs the most, which features would be useful, which ones would not, what is missing, what is wrong, etc etc etc. As always, since we have limited resources, we should optimize them as much as possible. I count with you so that we can make a roadmap together on this project. Please, feel free to forward this survey anywhere where there could be an interest. https://www.surveymonkey.com/r/DHR22TL Best regards, [1] http://forum.world.st/ANN-Pharo-Consortium-Sponsored-Development-Effort-td4… -- Mariano http://marianopeck.wordpress.com

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