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

Re: Agile Artificial Intelligence

by Alexandre Bergel

Very well spotted! Thank you very much! Added here: https://github.com/Apress/agile-ai-in-pharo/issues/6 I will fix in the second edition. Even if all the code contained in the book is automatically tested, in this case, this was not enough. Thank you! Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On 21-08-2020, at 02:07, bentai <bentaisan(a)gmail.com> wrote: > > I think I found another bug in the book. I am using the Safari version, and the code in the text doesn't match the screenshot. For example, the text says: > somePoints := OrderedCollection new. > 500 timesRepeat: [ somePoints add: {(50 atRandom - 25) . (50 atRandom - 25)}]. > f := [ :x | (-2 * x) - 3 ]. > "We use the Roassal Grapher engine to plot our points" > g := RTGrapher new. > d := RTData new. > d dotShape color: [ :p | (p second > (f value: p first)) ifTrue: [ Color red trans ] ifFalse: [ Color blue trans ] ]. > d points: somePoints. > d x: #first. > d y: #second. > g add: d. > g > "" The rendered code in the Safari version gets an error, whereas the screenshot version works: > f := [ :x | (-2 * x) - 3 ]. > > somePoints := OrderedCollection new. > 500 timesRepeat: [ somePoints add: (( 50 atRandom - 25 ) @ ( 50 atRandom - 25 )) ]. > > g := RTGrapher new. > d := RTData new. > d dotShape color: [ :p | (p y > (f value: p x)) ifTrue: [ Color red trans ] ifFalse: [ Color blue trans ] ]. > d points: somePoints. > d x: #x. > d y: #y. > g add: d. > g > ----------------------------------------------------------------------------------- > > This may be part of the cause of my bug report on Git, e.g. there is a mismatch between the eBook version, the printed version and the Safari/OReilly version. > > It is Pharo 7.0.4, but I don't know if that matters in this case. > > I apologize for not following the procedure of cloning the github repository and creating bug request from there with pull requests, but I am still working out the configuration of Iceberg. > > Cheers, > Tom Sturgeon > > Sent from the Pharo Smalltalk Users mailing list archive <http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html> at Nabble.com.

Oct. 5, 2020

Re: Agile Artificial Intelligence first trained Perceptron

by Alexandre Bergel

Hello, Sorry to reply late. I just saw this email. Each training modify the weights and bias of the perceptron by a small quantity. It is just that, in this very particular case, from 31 or 32 is the drop that makes all things change... Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > On 21-08-2020, at 01:31, bentai <bentaisan(a)gmail.com> wrote: > > I noticed that if I trained the OR gate with 31 iterations, the first test > would fail. > > If I train with 32 iterations, then the test for #(0 0) would pass. > > What is the explanation for this "tipping point"? > > The other tests pass, even if timeRepeat := 1. > > I just decided to experiment a bit. > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >

Oct. 5, 2020

Re: [Pharo-dev] beta testers for the new version of the Pharo mooc

by Christopher Fuhrman

Hi Stef, At the very least I can help, but I will try to find some students. I just upgraded to WSL2 on Windows 10 and would like to see how Pharo performs. C. Fuhrman On Wed, Sep 30, 2020, 10:30 StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > Hello guys > > We are looking for beta tester for the new version of the Pharo mooc. > The beta test period is planned from 12 to 23 of october > Let me know if you can help. > > Tx > > > -------------------------------------------- > 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 > >

Oct. 1, 2020

Re: Energy efficiency of Pharo/Smalltalk

by Mariano Martinez Peck

Hi there, We did a related experiment with VA Smalltalk and other languages like Python, Java, etc... the context was how a JIT compiler can also help you reduce energy consumption...which could be very important for IoT. We did experiments on a Raspberry Pi, run some benchmarks and with some hardware tool we were measuring the wattage. You can see the whole presentation here: https://youtu.be/2xO0ohUNnug Hopefully this can get you started with Pharo experiments. Cheers, On Thu, Oct 1, 2020 at 8:47 AM Jonathan van Alteren < jvalteren(a)objectguild.com> wrote: > Hi all, > > I am interested in energy efficiency metrics for Pharo (version >=8). Just > now, I came across this research and related GitHub project: > > - https://sites.google.com/view/energy-efficiency-languages > - https://github.com/greensoftwarelab/Energy-Languages > > > Unfortunately, the paper mentions that Smalltalk was excluded from the > results because the (VW) compiler was proprietary :-S However, the GitHub > repository does contain Smalltalk code and results, but I haven't been able > to evaluate those. > > [1] Does anyone here have more information on this topic? > > > The benchmarks seem to be low-level algorithms. Although that is useful, I > think that a better argument for Pharo/Smalltalk efficiency is that a good > OO design (e.g. created using responsibility-driven design with > behaviorally complete objects) will be a better fit, can be much simpler > and will thus be more efficient during development, as well as easier to > maintain and evolve. > > [2] Has anyone done any research in this area that can quantify this > aspect? > > Kind regards, > > Jonathan van Alteren > > Founding Member | Object Guild B.V. > *Sustainable Software for Purpose-Driven Organizations* > > jvalteren(a)objectguild.com > -- 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/

Oct. 1, 2020

Re: [Pharo-dev] beta testers for the new version of the Pharo mooc

by Juan Pablo Sandoval Alcocer

Hi Stef, Daniel (in copy), one of my students, is willing to help. He started with Pharo one year ago, he also read the previous version of Pharo mooc. Regards, Juan P. El miÃ©., 30 sept. 2020 a las 10:30, StÃ©phane Ducasse (< stephane.ducasse(a)inria.fr>) escribiÃ³: > Hello guys > > We are looking for beta tester for the new version of the Pharo mooc. > The beta test period is planned from 12 to 23 of october > Let me know if you can help. > > Tx > > > -------------------------------------------- > 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 > >

Oct. 1, 2020

Re: exercism bowling challenge

by Russ Whaley

Yes, my thoughts - since I'm not as technical as the rest of you: BowlingGame class "runs the game a calls each frame to 'process'" - frames (1-10 aFrame objects) - score (aScore object) - currentFrame Frame class "frame handles #throws, pins remaining, and lets Game know when to advance to next frame - frameEnd" - frame# - throws (1-3 aThrow objects - aFrame controls 10th frame 3rd throw) - score (numeric) Throw class - frame (the frame I belong to) - throw# (incremental numeric 1-3) - pinsKnockedDown (0-10) Score class - frames (same as BowlingGame class) - methods to calculate score, once a frame score has been determined, it is stored on the frame and the score calc simply picks that up and moves forward on each successive score calc (after each throw - called from inside of aFrame) This will be a fun little diversion. I'll create a simple UI and engine that will randomly return a number of pinsKnockedDown when pressing the spacebar to roll the next ball. On Fri, Sep 25, 2020 at 3:11 PM DavidBajger <bajger(a)gmail.com> wrote: > Thanks for your reply! Anyway.. wow, 3 lines of code, I'd like to see > that! I > didn't really get into FLP (except some small howeworks on University and > that's alraeady forgotten), so I don't know, what is the advantage here. I > thought that Pharo (Smalltalk) can be considered as functional language > too, > because of blocks. If there wouldn't be any exception handling, would Pharo > code be so compact as well (e.g. by using #inject:into:)? > > > > > > ----- > David Bajger > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > -- Russ Whaley whaley.russ(a)gmail.com

Oct. 1, 2020

Energy efficiency of Pharo/Smalltalk

by Jonathan van Alteren

Hi all, I am interested in energy efficiency metrics for Pharo (version >=8). Just now, I came across this research and related GitHub project: â¢ https://sites.google.com/view/energy-efficiency-languages â¢ https://github.com/greensoftwarelab/Energy-Languages Unfortunately, the paper mentions that Smalltalk was excluded from the results because the (VW) compiler was proprietary :-S However, the GitHub repository does contain Smalltalk code and results, but I haven't been able to evaluate those. [1] Does anyone here have more information on this topic? The benchmarks seem to be low-level algorithms. Although that is useful, I think that a better argument for Pharo/Smalltalk efficiency is that a good OO design (e.g. created using responsibility-driven design with behaviorally complete objects) will be a better fit, can be much simpler and will thus be more efficient during development, as well as easier to maintain and evolve. [2] Has anyone done any research in this area that can quantify this aspect? Kind regards, Jonathan van Alteren Founding Member | Object Guild B.V. Sustainable Software for Purpose-Driven Organizations jvalteren(a)objectguild.com

Oct. 1, 2020

Re: Space Based Repetition

by Sean P. DeNigris

Tim Mackinnon wrote > I donât quite know how you choose or specify the probabilitiesâ¦ Iâm > enquiring. Please report back on your findings! Tim Mackinnon wrote > SM-2 always intrigued meâ¦ but was trying to avoid the inevitable rabbit > hole Yes, same. Although I'm sure I will eventually get pulled in lol. The beautiful thing about flashcards in a dynamic system like Smalltalk is that one could define an API so that *any* domain object could be turned into a flashcard, like the birthdays of your contacts (silly example but you get the idea). I did extensive reading on the SM-2 creator's website and played with Anki a bit. It's been on my endless TODOs to do something simple like Anki in Pharo... ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

Oct. 1, 2020