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[ANN] RewriteTool has successfully ported to Spec2
by Juan Pablo Sandoval Alcocer April 6, 2020

April 6, 2020

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

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Re: [Pharo-users] Latest PharoJS Success Story; Wasm/WASI; very keen on Pony for the Pharo VM
by Shaping April 6, 2020

April 6, 2020

All: > Brain Treats got stuck during launch on my LG. > Which android version are you using ? The phone is old and this is likely the problem. Android version: 4.4.2 Kernel version: 3.4.0 > Is there a plan to move PharoJS to Wasm/WASI? > Dave and I talked about it a long time ago. This sounds like a good idea. Actually, Dave has a very ambition idea = turn PharoJS into Pharo* where * can be different targets. But, there's a lot to do before reaching this goal. So, don't expect it any time soon. Not to change the topic too much, but the following is related and I often think of it. Consider writing the pharo VM in Wasm or, better, with Pony (which can emit Wasm, as needed). Pony's reference-capability-based (ref-cap) concurrency-model guarantees provably that no data-races or deadlocks can happen if the code compiles; this solves a very large class of extremely ugly concurrency problems that no one ever wants to face. Pony gives high-performance concurrency (5 to 15 ns actor-thread switching time, depending on platform), and solves the most difficult class of synchronization problems at compile time. It runs as fast as C. It runs faster than C, as concurrency scales. You can't scale a highly concurrent app efficiently in C, and really shouldn't try if you wish to remain happy and mentally healthy. Pony is still pre-1.0, but the group is very active and competent. I think we should consider using it to build the VM. Have a look. Some videos for your amusement and information: https://www.youtube.com/watch?v=ODBd9S1jV2s https://www.youtube.com/watch?v=u1JfYa413fY https://www.youtube.com/watch?v=fNdnr1MUXp8 https://www.ponylang.io/ There are many others. I mentioned the Pony concurrency architecture around the holidays, but there was no interest from the list-not a good time perhaps. The tentative plan is to do what Google does with Flutter: have the JIT in support of the usual dynamicity a Smalltalker needs for rapid development; and have AOT, fully optimized compiling for production or speed-related reality checks, presumably needed less often during development. There are other possibilities. Anyone interested? I have some ideas for simplifying use of the six ref caps in the context of Pharo/Smalltalk. If this path is chosen, one must commit to strict state-machine-based algorithm development, without exception. This should have happened anyway by now, broadly in the programming space, but didn't. I'm working on a programming graphical tool and associated grammar (in VW) that make state-machine development easy and attractive. This , besides efficient use of machine resources, is the other reason for pushing in this direction. A Pony program is built from a net of asynchronously communicating actors. You change the state of your program with asynchronous messaging between actors. There is no blocking--no mutexes or semaphores-and therefore no wasted CPU cycles or mushrooming program complexity, as you try to use mutexes in a fine-grained way (a very bad idea). And as mentioned, there are never deadlocks or data-races. All cores on all CPUs stay busy, always, until the program goes idle or exits. The Pony group is also working on extending the model to the network level, so that all machine nodes in the network stay busy. In the round, as a start, think of Pony as Erlang/OTP, but much faster, with no legacy bugs, and provably no-deadlocking on compile. The asynchronous actor model is the programming pattern that Kay had in mind when he said "object-oriented." It's the one I want to implement in Pharo. The green threads are light, but don't efficiently use the cores, and a net of VMs with their respective images still communicate too slowly. I your time permits, please study Pony for a bit, before rejecting the idea as too big a change in direction or too complicated. Using Pony looks like the ideal VM simplification strategy, if our aim is efficient use of networks of machines, each with at least one CPU (often more), each, in turn, with many cores (whose numbers are still increasing). This pattern in hardware probably won't be changing much, now that speeds are topping out. Winning the performance game is therefore about efficiently using many cores at once, without burdening the programmer. I don't see a better way to do this now than with Pony. Thoughts and suggestions are welcome. Shaping > -----Original Message----- > From: Pharo-users [ <mailto:pharo-users-bounces@lists.pharo.org> mailto:pharo-users-bounces@lists.pharo.org] On > Behalf Of N. Bouraqadi > Sent: Tuesday, 28 January, 2020 12:18 > To: Any question about pharo is welcome < <mailto:pharo-users@lists.pharo.org> pharo-users(a)lists.pharo.org> > Subject: [Pharo-users] Latest PharoJS Success Story > > The latest PharoJS-powered smartphone app is now live. > Development has been made using Pharo. > Then, javascript code is generated using PharoJS. > Last, the app is built to target both iOS and Android thanks to Apache > Cordova. > > Learn more and Download at > <https://nootrix.com/projects/brain-treats-app/> https://nootrix.com/projects/brain-treats-app/ > > Noury > >

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Re: [Pharo-users] Test Completion has been added to Pharo 8 - please test!
by shaunalan April 6, 2020

April 6, 2020

sdfsdfdsf -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Re: [Pharo-users] Test Completion has been added to Pharo 8 - please test!
by shaunalan April 6, 2020

April 6, 2020

The sale was moving along smoothly for Redondo Beach-based land agent App Design Companies <https://www.cmolds.com/> , mobile game apps development <https://www.cmolds.com/game-app-development> and her client earlier this month until the COVID-19 pandemic and stay-at-home orders hit. a few of weeks into escrow, the customer dropped out and Martini scrambled to seek out a replacement. âIt was due to the coronavirus and therefore the fear and instability of whatâs to return ,â said Martini, a Movoto agent. âThe buyer backed out due to job instability. With the stock exchange tanking and thousands of layoffs, most are quite afraid to form the move.â -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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What Effect Will COVID-19 and the Stay-At-Home Order Have on the Real Estate Market?
by shaunalan April 6, 2020

April 6, 2020

The sale was moving along smoothly for Redondo Beach-based land agent App Design Companies <https://www.cmolds.com/> , mobile game apps development <https://www.cmolds.com/game-app-development> and her client earlier this month until the COVID-19 pandemic and stay-at-home orders hit. a few of weeks into escrow, the customer dropped out and Martini scrambled to seek out a replacement. âIt was due to the coronavirus and therefore the fear and instability of whatâs to return ,â said Martini, a Movoto agent. âThe buyer backed out due to job instability. With the stock exchange tanking and thousands of layoffs, most are quite afraid to form the move.â -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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[Spec] List and notebook page
by Hilaire April 6, 2020

April 6, 2020

Hi, In a list contained in a notebook page, the display bloc is not called as expect: Likely I missed something, any idea? Thank. Keep safe. Hilaire connectPresenters Â Â Â scripts whenSelectedItemChanged: [ :class | Â Â Â Â Â Â methods selectPageIndex: 1. Â Â Â Â Â Â ((methods pageAt: 1) activePresenter ) Â Â Â Â Â Â Â Â Â items:Â class methods; Â Â Â Â Â Â Â Â Â display: [:aMethod | self halt. aMethod selector]. Â Â Â Â Â Â sourceÂ Â Â Â clearContent ]. newMethodsList Â Â Â methods := self newNotebook. Â Â Â methods Â Â Â Â Â Â addPage: self instanceMethodsTab; Â Â Â Â Â Â addPage: self classMethodsTab instanceMethodsTab Â Â Â ^ SpNotebookPage Â Â Â Â Â Â title: 'Methods' translated Â Â Â Â Â Â provider: [ self newList ] -- Dr. Geo http://drgeo.eu

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Lighthouse
by Martin Barale April 4, 2020

April 4, 2020

Does lighthouse work on modern versions of pharo? I wanted to take a look at it but it gave me some problems in versions 8, and 6. Regards, Martin

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Help! Iceberg just stopped working!
by Russ Whaley April 4, 2020

April 4, 2020

I did a commit last night to GitHub - I checked, it's there. Today when I tried to load iceberg I get the attached error (see screenshot). The libraries from last night's commit/push are still there - but Iceberg says it can't find them... and refuses to load so that I could maybe delete the reference and then add it back (something I have to do quite often as the iceberg/github connection gets disconnected every couple of days or so). Can anyone tell me where to start looking? Where it says on the error - that it can't find my files at a certain location... the 2nd screenshot - is those files at that location!... Thanks! Russ -- Russ Whaley whaley.russ(a)gmail.com

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Iceberg problems...
by Russ Whaley April 4, 2020

April 4, 2020

I don't know how to respond to a previous message I've sent (without having a response from someone else appear in my email!)... I got my Iceberg problems solved by deleting my repository and starting over. I don't know why I had to do this, but it was a 60 second fix, once I decided to go down that route. I've had to do this probably 5-6 times over the past month. All other times have been due to (at least in my observation) to the image hanging - where I can't <cmd-.>. I don't whether there is a top secret file inside each repository - or the folders are timestamped, or whatever, but my repository is now back up and running. Thanks! -- Russ Whaley whaley.russ(a)gmail.com

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Google Form
by Hilaire April 4, 2020

April 4, 2020

Hi, As teachers and students are confined home, there are some needs of tooling for distance learning. Did any of you worked on generating Google Form with Pharo? Hilaire -- Dr. Geo http://drgeo.eu

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