November 2020 - Pharo-users

Re: Constraint solver in Pharo?

by stephan

Replacing BTNGVariable>>#nextValue by nextValue Â Â Â | nextValue | Â Â Â self currentValue Â Â Â Â Â Â ifNotNil: [valuesToExplore remove: self currentValue]. Â Â Â nextValue := self valuesToExplore ifEmpty: [ nil ] Â Â Â Â Â Â Â Â Â Â Â Â ifNotEmpty: [self valuesToExplore anyOne]. Â Â Â self currentValue: nextValue. Â Â Â ^ nextValue returning nil instead of self when there are no more new values makes the tests pass in BackTalkNG-Noury.20.mcz (Pharo 9) That version looks like it is work in progress but has one working solver. Stephan

Nov. 6, 2020

Re: TeaTime replication ported to Pharo

by Rafael Luque

Thank you all for these references. I'm going to study the TeaTime implementation from the Open Croquet version "restored" for Squeak by Nikolay Suslov and we'll share our experiments. Regarding BluePlane.xyz we are moving slowly. For the moment we have been playing with ideas like Scenario-Based Programming (by David Harel). We implemented a very rough library for "behavioral programming" in Pharo with some typical examples. We are now refactoring it to use actors instead of processes. We hope to release it soon Cheers, Rafael Luque. El miÃ©., 4 nov. 2020 a las 23:12, Offray Vladimir Luna CÃ¡rdenas (< offray.luna(a)mutabit.com>) escribiÃ³: > Hi both Jonathan and Rafael, > > On 4/11/20 2:30 p. m., Jonathan van Alteren wrote: > > > > Send me a PM if you're interested to have a chat about this sometime. > > I've been meaning to ask you about Blueplane.xyz for a while, but > > haven't come around to it. I'd love to hear more about your goals and > > share some ideas. > > Let me know if you can also keep me in the loop regarding blueplane.xyz > as is interesting to me also and I would like to see how/if it can > dialogue with local initiatives here related with critical code+data > literacy. > > Cheers, > > Offray >

Nov. 6, 2020

Re: Pharo Mars still not working on Ubuntu

by kmo

Mars now loads on Ubuntu but crashes with illegal instruction when you attempt to use it. Back to where we were in late July. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Nov. 6, 2020

[Ann] IndieWeb and pocket infrastructures: 7th biweekly workshop this Saturday (3:15 PM - 7:15 PM, GMT-5)

by Offray Vladimir Luna CÃ¡rdenas

Hi all, This is just a short reminder about our biweekly Grafoscopio community workshops about IndieWeb and pocket infrastructures (in Spanish). You can find more information about them on: [1] https://mutabit.com/repos.fossil/indieweb/doc/trunk/docs/es/index.html#tall… As usual, I would like to thanks the remote community that makes this local experience possible, and also I would like to thank ESUG for their key support to this initiative. Cheers, Offray

Nov. 4, 2020

Re: TeaTime replication ported to Pharo

by Offray Vladimir Luna CÃ¡rdenas

Hi both Jonathan and Rafael, On 4/11/20 2:30 p.Â m., Jonathan van Alteren wrote: > > Send me a PM if you're interested to have a chat about this sometime. > I've been meaning to ask you about Blueplane.xyz for a while, but > haven't come around to it. I'd love to hear more about your goals and > share some ideas. Let me know if you can also keep me in the loop regarding blueplane.xyz as is interesting to me also and I would like to see how/if it can dialogue with local initiatives here related with critical code+data literacy. Cheers, Offray

Nov. 4, 2020

Re: TeaTime replication ported to Pharo

by Jonathan van Alteren

Hi Rafael, I share your interest! Over the last few months, I've been trying to gather more in-depth information on TeaTime and how it might be used in a different context, more geared towards distributed business applications. Quite a bit of Croquet material can still be found, although most of the time it requires some cleverness with the Wayback Machine. However, I found it quite hard to get my hands on good TeaTime documentation and didn't dare to dive into the Squeak Croquet code yet. Thank you for sharing the Archipelago paper, very interesting! I came across this podcast recently. Haven't listened to it yet, but you might find it interesting:Â http://jarober.com/blog/blogView?entry=3487141940 Working MP3 link here:Â http://s3.amazonaws.com/jarober/im36.mp3 Send me a PM if you're interested to have a chat about this sometime. I've been meaning to ask you about Blueplane.xyz for a while, but haven't come around to it. I'd love to hear more about your goals and share some ideas. Kind regards, Jonathan van Alteren Founding Member | Object Guild B.V. Sustainable Software for Purpose-Driven Organizations +316 22500930 jvalteren(a)objectguild.com On 4 Nov 2020, 17:19 +0100, Rafael Luque <rafael.luque.leiva(a)gmail.com>, wrote: > Hi all, > > I wonder if there is any project for supporting the replication of shared objects between Pharo images. > > My interest is to explore the replication approach for distributed, peer-to-peer applications. However, instead of the mainstream replication of data, I'd like to play with the "behavior replication" proposed by the TeaTime architecture from the old Croquet project. > > The most modern reference I've found is this paper about Archipelago by Eric Seckler and Robert Hirschfeld: > > http://www.hirschfeld.org/writings/media/SecklerHirschfeld_2014_Archipelago… > > ThankÂ you, > Rafael Luque. > >

Nov. 4, 2020

Re: TeaTime replication ported to Pharo

by StÃ©phane Ducasse

nikloai http://wiki.squeak.org/squeak/2901 wrote "I had a success on partly restoring of Open Croquet onto Squeak 5.2 (https://blog.krestianstvo.org/en/open-croquet-for-squeak-6/) <https://blog.krestianstvo.org/en/open-croquet-for-squeak-6/)>. Source code is also available on Git, by using Squot https://github.com/NikolaySuslov/croquet-squeak <https://github.com/NikolaySuslov/croquet-squeak>. So, one can run some of the same demos, that historical screenshots could be found at the https://en.wikipedia.org/wiki/Croquet_Project <https://en.wikipedia.org/wiki/Croquet_Project>. As for current Squeak 5.3 release, I'm steel in the process of testing Open Croquet on it. Croquet has already a long history and I thinking, that it is quit important to keep information for all development stages, it is passed through also. Every Croquet version based on Squeak VM/Image pair has it's own unique features worth of exploration. Also, there are lot of videos on David A. Smith's YouTube channel with Croquet demos from the "future" (https://croquet.studio/ <https://croquet.studio/>), now and the past, like https://www.youtube.com/watch?v=mOZPW8l85eI <https://www.youtube.com/watch?v=mOZPW8l85eI>\ â > On 4 Nov 2020, at 17:18, Rafael Luque <rafael.luque.leiva(a)gmail.com> wrote: > > Hi all, > > I wonder if there is any project for supporting the replication of shared objects between Pharo images. > > My interest is to explore the replication approach for distributed, peer-to-peer applications. However, instead of the mainstream replication of data, I'd like to play with the "behavior replication" proposed by the TeaTime architecture from the old Croquet project. > > The most modern reference I've found is this paper about Archipelago by Eric Seckler and Robert Hirschfeld: > > http://www.hirschfeld.org/writings/media/SecklerHirschfeld_2014_Archipelago… <http://www.hirschfeld.org/writings/media/SecklerHirschfeld_2014_Archipelago…> > > Thank you, > Rafael Luque. > > -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle 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

Nov. 4, 2020

Re: TeaTime replication ported to Pharo

by StÃ©phane Ducasse

> On 4 Nov 2020, at 17:18, Rafael Luque <rafael.luque.leiva(a)gmail.com> wrote: > > Hi all, > > I wonder if there is any project for supporting the replication of shared objects between Pharo images. Not that I know but it would be really interesting. Another topic is also synchronizing data structure (that supports working off on). > My interest is to explore the replication approach for distributed, peer-to-peer applications. However, instead of the mainstream replication of data, I'd like to play with the "behavior replication" proposed by the TeaTime architecture from the old Croquet project. > > The most modern reference I've found is this paper about Archipelago by Eric Seckler and Robert Hirschfeld: > > http://www.hirschfeld.org/writings/media/SecklerHirschfeld_2014_Archipelago… <http://www.hirschfeld.org/writings/media/SecklerHirschfeld_2014_Archipelago…> may be the code is available I have the code of SolarCroquet if you want. and an older version from Squeak3.4 and teaSqueak1.9.exe So let me know if you want to code. After you can contact the authors of the paper. > > Thank you, > Rafael Luque. > > -------------------------------------------- StÃ©phane Ducasse http://stephane.ducasse.free.fr / http://www.pharo.org 03 59 35 87 52 Assistant: Aurore Dalle 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

Nov. 4, 2020

TeaTime replication ported to Pharo

by Rafael Luque

Hi all, I wonder if there is any project for supporting the replication of shared objects between Pharo images. My interest is to explore the replication approach for distributed, peer-to-peer applications. However, instead of the mainstream replication of data, I'd like to play with the "behavior replication" proposed by the TeaTime architecture from the old Croquet project. The most modern reference I've found is this paper about Archipelago by Eric Seckler and Robert Hirschfeld: http://www.hirschfeld.org/writings/media/SecklerHirschfeld_2014_Archipelago… Thank you, Rafael Luque.

Nov. 4, 2020

[ANN] Pharo P3 PostgreSQL client extended with SCRAM-SHA-256 authentication support

by Sven Van Caekenberghe

Hi, P3, the modern, lean and mean PostgreSQL client for Pharo has been extended with SCRAM-SHA-256 authentication support. https://github.com/svenvc/P3 To authenticate users when a client connects to the database, several mechanisms are offered by PostgreSQL. Previously, the following methods were supported in P3: - trust (no password) - password (plain text password) - md5 (MD5 based challenge/response) More recent versions of PostgreSQL offer a method called 'scram-sha-256', which is an improved challenge/response scheme using more advanced cryptographic techniques. To make this feature possible, a couple of these cryptography techniques had to be implemented: - https://en.wikipedia.org/wiki/Simple_Authentication_and_Security_Layer - https://en.wikipedia.org/wiki/Salted_Challenge_Response_Authentication_Mech… - https://en.wikipedia.org/wiki/PBKDF2 This is all a bit technical, but if there are PostgreSQL users out there that do understand this, you could help with testing this new feature - the main README file has been updated with a 'Connection and Authentication' section. The development work for adding this feature (as open source) was generously paid for by IngenieurbÃ¼ro fÃ¼r Bauwesen Schmidt GmbH (in collaboration with Richard Uttner of Projector Software GmbH and Pavel Krivanek) - thank you. Regards, Sven -- Sven Van Caekenberghe Proudly supporting Pharo http://pharo.org http://association.pharo.org http://consortium.pharo.org

Nov. 4, 2020