February 2018 - Pharo-users

Re: [Pharo-users] How can a Morph display a context menu on a mouse click?

by Juraj Kubelka

> El 03-02-2018, a las 07:26, stephan <stephan(a)stack.nl> escribiÃ³: > > On 02-02-18 15:19, Juraj Kubelka wrote: >> Thank you Stephan! >> There is my exercise: >> âwhen:send:to" >> morph := 'Hello' asMorph. >> morph when: #click send: #traceCr: to: morph. >> morph openInWindow. > > Sorry > > morph := 'Hello' asMorph. > morph on: #mouseUp send: #traceCr: to: morph. > morph openInWindow. > This does not work for me either. I am fine with the MorphicEventHandler solution. Thanks! Juraj

Feb. 5, 2018

Re: [Pharo-users] global exception handler mechanism

by Igor Stasenko

On 5 February 2018 at 10:17, Marcus Denker <marcus.denker(a)inria.fr> wrote: > Hello, > > The Sunit-Debugger does a stack search on startup to find the test related > exception. > > It might be good to do it better, especially as the debug process starts > from the exception > I might be a good idea to actually keep a reference to it. > > Would there be any downside of Exception>>debug passing a reference to the > Debugger? > > Marcus > > > > On 2 Feb 2018, at 17:19, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > > > Hi, > > > > is there a way to install a global handler for exceptions? > > > > Right now if I want to log all exceptions, I use approach from ShoreLine > and create a PreDebugAction which is activated when any "unhandled" > exception occurs. > > > > That would be good enough, however the Debugger has zero knowledge of > the exception that is actually occuring, as Exception>>debug passes on only > the title. So if I want to get back to the original exception and maybe log > it with beacon, I need to do a lot of stack and context shenanigans: > > > > MyPreDebugAction>>logException > > MyLogger > > runDuring: [ (debugger session interruptedProcess > suspendedContext stack > > detect: [ :context | context receiver > isKindOf: Exception ]) receiver emit ] > > > > > > Is there a better way to approach this? > if you own a process (you creating it) , then it is just a piece of cake, just make a topmost block with #on:do: if you don't own a process (suppose you wanna watch already existing one) , it can be done by injecting own context at the bottom of stack , well, unless there are exception handler(s) upper, that catch any exception(s) before you can see them. I think a much better way would be to watch exceptions even before they being handled, for this, i would override Exception>>#signal and add some kind of logging or notification .. well, anything you see fit. That's, of course, a kind of dangerous, be careful. Do not attempt to throw new exceptions while processing just signaled one, else you'll get infinite recursion :) > > > Thanks, > > Peter > > > -- Best regards, Igor Stasenko.

Feb. 5, 2018

Re: [Pharo-users] global exception handler mechanism

by Marcus Denker

Hello, The Sunit-Debugger does a stack search on startup to find the test related exception. It might be good to do it better, especially as the debug process starts from the exception I might be a good idea to actually keep a reference to it. Would there be any downside of Exception>>debug passing a reference to the Debugger? Marcus > On 2 Feb 2018, at 17:19, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > > Hi, > > is there a way to install a global handler for exceptions? > > Right now if I want to log all exceptions, I use approach from ShoreLine and create a PreDebugAction which is activated when any "unhandled" exception occurs. > > That would be good enough, however the Debugger has zero knowledge of the exception that is actually occuring, as Exception>>debug passes on only the title. So if I want to get back to the original exception and maybe log it with beacon, I need to do a lot of stack and context shenanigans: > > MyPreDebugAction>>logException > MyLogger > runDuring: [ (debugger session interruptedProcess suspendedContext stack > detect: [ :context | context receiver isKindOf: Exception ]) receiver emit ] > > > Is there a better way to approach this? > > Thanks, > Peter

Feb. 5, 2018

Re: [Pharo-users] Neural Network - Handwritten Digit Recognition

by CÃ©drick BÃ©ler

Excellent indeed ! I will use it to show students ^^ and try tu improve the network. Big Thx Cedrick > Le 4 fÃ©vr. 2018 Ã 14:17, Sven Van Caekenberghe <sven(a)stfx.eu> a Ã©crit : > > Beautiful, great work, Pierce ! > >> On 4 Feb 2018, at 13:42, Pierce Ng <pierce(a)samadhiweb.com> wrote: >> >> Hi all, >> >> I've written a blog post on recognizing handwritten digits using neural >> networks in Pharo. >> >> http://www.samadhiweb.com/blog/2018.02.04.neural.networks.html >> >> I attach here two screenshots built using Roassal showing good and bad >> recognition outcomes. I must say Roassal is great! >> >> Comments welcome here or on my blog. >> >> Pierce >> >> <nn-uci-digits-good.png><nn-uci-digits-bad.png> > >

Feb. 4, 2018

Re: [Pharo-users] Neural Network - Handwritten Digit Recognition

by Sven Van Caekenberghe

Beautiful, great work, Pierce ! > On 4 Feb 2018, at 13:42, Pierce Ng <pierce(a)samadhiweb.com> wrote: > > Hi all, > > I've written a blog post on recognizing handwritten digits using neural > networks in Pharo. > > http://www.samadhiweb.com/blog/2018.02.04.neural.networks.html > > I attach here two screenshots built using Roassal showing good and bad > recognition outcomes. I must say Roassal is great! > > Comments welcome here or on my blog. > > Pierce > > <nn-uci-digits-good.png><nn-uci-digits-bad.png>

Feb. 4, 2018

Neural Network - Handwritten Digit Recognition

by Pierce Ng

Hi all, I've written a blog post on recognizing handwritten digits using neural networks in Pharo. http://www.samadhiweb.com/blog/2018.02.04.neural.networks.html I attach here two screenshots built using Roassal showing good and bad recognition outcomes. I must say Roassal is great! Comments welcome here or on my blog. Pierce

Feb. 4, 2018

Pillar script evaluation generating a screenshot

by Juraj Kubelka

Hi, Pillar allows to evaluate a script and use its output instead of the script itself, e.g., -=-=-=- [[[eval=true DateAndTime now printString ]]] -=-=-=- How can I test it in a Pharo image? I tried: -=-=-=- document := PRPillarParser parse: '[[[eval=true DateAndTime now printString ]]]' readStream. PRHTMLWriter write: document. -=-=-=- It returns: <figure><pre><code>DateAndTime now printString</code></pre><figcaption></figcaption></figure> Then I tried: -=-=-=- transformedDocument := (PRScriptEvaluator executeOn: (PRCompilationContext withDocument: document withConfiguration: PRPillarConfiguration new)) input. PRHTMLWriter write: transformedDocument. -=-=-=- And it returns an empty string. What should I do to be able to obtain an HTML output with the output of `DateAndTime now printString`? -=-=-=- documentWithImage := PRPillarParser parse: '[[[eval=true ByteArray streamContents: [ :writeStream | PNGReadWriter putForm: World submorphs atRandom imageForm onStream: writeStream ] ]]]' readStream. -=-=-=- What is the best practice if the evaluated result should be a screenshot? Thanks! Juraj

Feb. 3, 2018

Re: [Pharo-users] How can a Morph display a context menu on a mouse click?

by stephan

On 02-02-18 15:19, Juraj Kubelka wrote: > Thank you Stephan! > > There is my exercise: > > âwhen:send:to" > morph := 'Hello' asMorph. > morph when: #click send: #traceCr: to: morph. > morph openInWindow. Sorry morph := 'Hello' asMorph. morph on: #mouseUp send: #traceCr: to: morph. morph openInWindow.

Feb. 3, 2018

Re: [Pharo-users] New booklets organisation and new booklet

by Stephane Ducasse

> > Let me know if you'd like to add a bioinformatics or geographic > information retrieval chapter. I wrote the chapters in Markdown for > pandoc but I can convert them to Pillar once it's ready for Windows. Sure I will set up a booklet-folder and make sure that it compiles on travis so that you can also check before we fix the windows. Guille (and me) worked on the AppVeyor integration but I do not remember where we stopped. Stef

Feb. 3, 2018

Re: [Pharo-users] New booklets organisation and new booklet

by HernÃ¡n Morales Durand

Hi Stef, 2018-02-02 16:16 GMT-03:00 Stephane Ducasse <stepharo.self(a)gmail.com>: > On Fri, Feb 2, 2018 at 2:05 PM, HernÃ¡n Morales Durand > <hernan.morales(a)gmail.com> wrote: >> Hi, >> >> One can make money by writing a Pharo-related book? > > Since most of the books I wrote are free I did not earn much. > Most of the time if ESUG would not sponsor I would earn 200 Euros max. > Ok, please note that 200 euros is about half of the minimum salary at least here: http://www.xe.com/currencyconverter/convert/?Amount=200&From=EUR&To=ARS https://es.wikipedia.org/wiki/Anexo:Salario_m%C3%ADnimo_en_Argentina And the min salary is an absolute crap. Yes, that's how bad it is. > > Now the association could sponsor book too. > We could also create a bounty for booklets. > I would love to read books or booklets written by others and I'm ready > to pay for it. > I would like to read a book on IA, Bloc, And many topics in fact. > >> It takes a significant amount of effort to write a book, you know >> better of course. >> >> Is there a plan for monetization so people maybe gets more motivated >> to write Pharo material? > > I'm planning to make my last book on lulu (it is there but I'm waiting > for the first printout) > and to offer a good reduction to the association members. > > Stef Thank you for the reply. Let me know if you'd like to add a bioinformatics or geographic information retrieval chapter. I wrote the chapters in Markdown for pandoc but I can convert them to Pillar once it's ready for Windows. Cheers, HernÃ¡n >> >> Cheers, >> >> HernÃ¡n >> >

Feb. 3, 2018