January 2020 - Pharo-users - lists.pharo.org

Large Image Generator
by Benoit St-Jean Jan. 29, 2020

Jan. 29, 2020

Just read that announcement (https://pharoweekly.wordpress.com/2020/01/29/ann-large-image-generator/) on Pharo Weekly. Anyone knows more about the precise goal of that project?Â What is the exact purpose of those images and what are we trying to test?Â Garbage collection?Â The VM behavior under stress? Limitations of Pharo on a specific OS? A reference against which future versions will be benchmarked for performance? Iceberg and code management performance? How base classes react when they have to deal with millions of objects (e.g. a Bag with 15 million objects, forking 15000 processes, creating 20000 semaphores, etc) ? -- ----------------- BenoÃ®t St-Jean Yahoo! Messenger: bstjean Twitter: @BenLeChialeux Pinterest: benoitstjean Instagram: Chef_Benito IRC: lamneth GitHub: bstjean Blogue: endormitoire.wordpress.com "A standpoint is an intellectual horizon of radius zero". (A. Einstein)

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Another Smalltalk Poll
by Richard Kenneth Eng Jan. 29, 2020

Jan. 29, 2020

Any feedback? [image: image.png]

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Extending the Smalltalk Syntax
by Richard Kenneth Eng Jan. 29, 2020

Jan. 29, 2020

The fourth and final article in the series: https://smalltalk.tech.blog/2020/01/29/extending-the-smalltalk-syntax-4/. Leandro Caniglia did a great job! These kinds of articles showcase Smalltalk/Pharo in a wonderful way. Lorenzo Schiavina will be submitting an article in the very near future. I'm really looking forward to it! Anybody else care to participate?

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Migration from Spec to Spec2
by Kasper Ãsterbye Jan. 29, 2020

Jan. 29, 2020

Cheers all, There was a mail about Spec2 documentation on this list in the last few days. I had a Spec program, and wanted to see how to migrate it to Spec2. The before and after is the master and the Spec2Migration branches of: https://github.com/kasperosterbye/ovina I decided to write down an account of all my struggles in making this migration. That account is on: https://github.com/kasperosterbye/ovina/blob/Spec2Migration/SpectoSpec2.md Beware - it is LONG. In the end, I draw the following conclusions: - Class comments on which classes to use instead of the depricated ones should be mandatory! - Spotter is a real help - Changing terminology is a true pest - in particular since the terminology of a library is used in the applications - in my case Tab became Page. - The new library has not yet implemented all parts of the old one (but I am sure it has implemented new stuff as well). - The SpDemo class is not only good, it is a template for others to follow. - Do not silently delete features. Be brave and include a method oddRowColor with a comment saying it is not going to be implemented in this version, and why. Some of them refer to specifics of the code. Overall I can say, that earlier today, Estaban wrote: "Widgets API is more or less compatible, chances are that your components will work out of the box or it will be rewritten by a deprecation rule. What is not compatible and there I not auto migration is the layout. You will need to rewrite those.â I am afraid to say, that was not my experience :-) Best, Kasper

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Re: [Pharo-users] Resources Page
by horrido Jan. 29, 2020

Jan. 29, 2020

If someone can confirm that this is still true, I'll update the Resources Page. Pharo Smalltalk Users mailing list wrote > I don't know if it's still the case but "trial version" for VAST, in the > past, only meant that you could use the product forever but you didn't > have the possibility to create an executable iirc. > > On 2020-01-28 20:37, horrido wrote: >> I never consider a trial version as a free product. As far as I'm >> considered, >> it's only free (or Community Edition) if I can use it indefinitely. >> >> >> >> Dale Henrichs-3 wrote >>> I think the free license is contingent upon having contributed to an >>> open source project. Also there appears to be free trial version[1]. >>> >>> Dale >>> >>> [1] https://www.instantiations.com/products/vasmalltalk/download.html >>> >>> On 1/28/20 5:25 PM, Richard Sargent wrote: >>>> Thanks. >>>> >>>> On Tue, Jan 28, 2020, 17:21 horrido < >>> horrido.hobbies@ >>> >>> > <mailto: >>> horrido.hobbies@ >>> >> wrote: >>>> Done. I didn't realize there was a free license for GemStone/S. >>>> >>>> Too bad VA Smalltalk doesn't offer a free license. >>>> >>>> >>>> I believe they do. >>>> >>>> >>>> >>>> >>>> >>>> Richard Sargent (again) wrote >>>> > Thank you, Richard. >>>> > >>>> > Would you be kind enough to annotate the GemStone link to point >>>> out that >>>> > we have a free license that permits commercial use, not only >>>> personal use. >>>> > >>>> > Thanks again for all your hard work! >>>> > >>>> > >>>> > On January 28, 2020 2:24:16 PM PST, Richard Kenneth Eng < >>>> >>>> > horrido.hobbies@ >>>> >>>> > > wrote: >>>> >>I've added a Resources page to my new blog: >>>> >>https://smalltalk.tech.blog/resources/. >>>> >> >>>> >>It is very much a *curated *list. I felt this was needed because >>>> when I >>>> >>visit other Smalltalk resources pages, I get overwhelmed by the >>>> number >>>> >>of >>>> >>links and options. It is possible to have *too many* choices. >>>> >> >>>> >>Moreover, many of those links are either broken, or they point >>>> to >>>> >>obscure >>>> >>materials that people may not be interested in. >>>> >> >>>> >>As curator, it is my job to present those links that I believe >>>> will be >>>> >>useful. Of course, this is necessarily very subjective. >>>> >> >>>> >>Also, it is likely that I've overlooked some links that others >>>> feel are >>>> >>useful. However, I am open-minded. If there are Smalltalk links >>>> that >>>> >>you >>>> >>believe I should consider, please let me know. >>>> >>>> >>>> >>>> >>>> >>>> -- >>>> Sent from: >>>> http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >>>> >> >> >> >> >> -- >> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >> > -- > ----------------- > BenoÃ®t St-Jean > Yahoo! Messenger: bstjean > Twitter: @BenLeChialeux > Pinterest: benoitstjean > Instagram: Chef_Benito > IRC: lamneth > GitHub: bstjean > Blogue: endormitoire.wordpress.com > "A standpoint is an intellectual horizon of radius zero". (A. Einstein) -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] Resources Page
by Mariano Martinez Peck Jan. 29, 2020

Jan. 29, 2020

On Tue, Jan 28, 2020 at 11:35 PM Benoit St-Jean via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > I don't know if it's still the case but "trial version" for VAST, in the > past, only meant that you could use the product forever but you didn't > have the possibility to create an executable iirc. > No, that's not the case and AFAIK it has never been. The correct statement is what I said before: 1) Trial versions are 45 days limit 2) Trial versions are the full version of the product, that is, there is no kind of limit or missing functionality (like creating executables). Best, -- Mariano Martinez Peck Email: marianopeck(a)gmail.com Twitter: @MartinezPeck LinkedIn: www.linkedin.com/in/mariano-martinez-peck <https://www.linkedin.com/in/mariano-mart%C3%ADnez-peck/> Blog: https://marianopeck.wordpress.com/

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What is the idiomatic way to store data in pharo?
by Steve Quezadas Jan. 28, 2020

Jan. 28, 2020

I am writing a simple "quote-of-the-day" object for pharo that stores both quotes and pictures. What is the "idiomatic" way of storing data in pharo? Do I connect to some sort mysql database or is there a better "smalltalk" way to do it? Forgive the naive question. - Steve

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Re: [Pharo-users] Pharo image processing library
by Pablo Navarro Jan. 28, 2020

Jan. 28, 2020

Hi everyone! Thanks for the comments, I don't create a repository yet because, in this first version, I just wanted to try if it was possible, so only create a Form subclass and add three methods. Form subclass: #ImageForm instanceVariableNames: 'mode' classVariableNames: '' package: âSmallImage' ââ> + aImage "add two image and return a new ImageForm" |aImageResult| aImageResult := self deepCopy. 0 to: self width do:[:x| 0 to: self height do:[:y| |aPoint aColorA aColorB| aPoint := (Point x: x y: y). aColorA := aImageResult colorAt: aPoint. aColorB := aImage colorAt: aPoint. aImageResult colorAt: aPoint put: aColorA + aColorB. ]]. ^ aImageResult â-> show: anTitle "Show a image in a window, scale the image to 500" |im| im := (ImageMorph withForm: (self scaledIntoFormOfSize:500) ). im withSnapshotBorder. im borderWidth: 5. im color: (Color gray). im openInWindowLabeled: (anTitle,' | mode: ', self mode asLowercase, '| ', self shape). -â> The first problem I found was the class Form return 'Form new' and not 'self class new' so I had to create two class method (in ImageForm): newFrom: aForm mode: aMode "create an ImageForm from to a Form object." | aImage| âaImage := self new. âaImage copyFrom: aForm. âaImage mode: aMode. â^ aImage. â> open:Â aFileName âOpen a image.â | aImage aForm| Â aForm := ImageReadWriter formFromFileNamed: aFileName. âaImage := self newFrom: aForm mode: âARGBâ. â^ aImage. â> I think that the methods (+ and show) should be directly in the class Form but I didn't want to change the original. If you think it's okay, I can continue working and this week upload to github with their respective tests. P.S. sorry for my limited English. Best Regards Pablo. El 25 de ene. de 2020 12:10 -0300, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr>, escribiÃ³: > what I always find strange is that people do not invest in tests for domains that are super nice to testâ¦. > > S. > > > On 25 Jan 2020, at 16:04, Serge Stinckwich <serge.stinckwich(a)gmail.com> wrote: > > > > You may have a look to Cuis library : https://github.com/Cuis-Smalltalk/Numerics > > There is an image analysis package. > > We have some plan in PolyMath to port it: https://github.com/PolyMathOrg/PolyMath/issues/158 > > > > Best, > > > > > On Fri, Jan 24, 2020 at 11:20 PM Pablo Navarro <pablo1n7(a)gmail.com> wrote: > > > > > Hi everyone! > > > > > > > > > > Iâm searching for oneÂ libraryÂ for image processing in Pharo. I couldn't find anything (only wrappers) so I tried programming one for basic operations (sum, > > > > > subtraction) with images using class âFormâ. > > > > > > > > > > What do you think about this? > > > > > > > > > > > > > > > For providing a context, I'm studying a PhD. in image processing, but all of the operations that I do, do it in Python. I try using Pharo for more fun :D. > > > > > > > > > > Best Regards Pablo. > > > > > > -- > > Serge Stinckwic > > âh > > > > Int. Research Unit > > Â on Modelling/Simulation of Complex Systems (UMMISCO) > > âSorbonne University > > Â (SU) > > French National Research Institute for Sustainable Development (IRD) > > U > > âniversity of YaoundÃ© Iâ, Cameroon > > "Programs must be written for people to read, and only incidentally for machines to execute." > > https://twitter.com/SergeStinckwich > > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr / http://www.pharo.org > 03 59 35 87 52 > Assistant: Julie Jonas > FAX 03 59 57 78 50 > TEL 03 59 35 86 16 > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France >

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Is Pharo is a good frontend system for a game console?
by ponyatov Jan. 28, 2020

Jan. 28, 2020

Good day I'm playing with custom little Linux for retrogaming console based on Raspberry Pi 4. Is Pharo is a good frontend system (GUI) for a game console? There is no mouse or keyboard by default, only joystick. So running Smalltalk interface on system bootup has some questions on usability. Also, it should be able to run external native binary programs that can use OpenGL and SDL/SDL2 so I'm not sure is the Pharo graphics system will be run on direct framebuffer without X11, and is it stable to be used with such libraries. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] smalltalk conferences
by Eric Gade Jan. 28, 2020

Jan. 28, 2020

NYC here. Any ST meetups would be great On Mon, Jan 27, 2020 at 10:06 PM Todd Blanchard via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > San Diego here. > > > On Jan 27, 2020, at 5:37 PM, tbrunz <wild.ideas(a)gmail.com> wrote: > > > > I'm in Los Angeles. Plenty of places to hold conferences here! (San > Diego & > > San Francisco, too.) > > > > > > > > > > -- > > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > > > > -- Eric

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