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

[ANN] Willow-Bootstrap v12.1.0 [v12.1.0] released!
by Buenos Aires Smalltalk May 17, 2020

May 17, 2020

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Willow affordance setValueTo etc
by TomaÅ¾ Turk May 17, 2020

May 17, 2020

Dear all, I'm playing with Willow and found it very useful for setting the web design, however, I have some challenges with understanding the interaction affordances. They are nicely described in the documentation - although somewhat cryptic. For instance, I cannot successfully set up the #setValueTo:thenTriggerChangeOf: "directly" on the TextField like in this example, where I'd like to set the text of aText to 'Some other text' after the button aButton is clicked: renderContentOn: html | aText aButton | aText := self componentSupplier singleLineTextFieldApplying: [ :theField | ]. aText changeContentsTo: 'Some text'. aButton := self componentSupplier asynchronicButtonLabeled: 'Click me' applying: [ :theButton | ]. aButton onTrigger setValueTo: 'Some other text' thenTriggerChangeOf: aText. The web browser reports 500 Internal server error with The identifier was never assigned. It is mentioned in the docs that IdentifiedWebView should be used to guarantee the id, however I cannot get it to work. As I understand, #serialize; #setValueTo: can be used instead of #serialize; #evaluate: ; #render affordances to get the data from the browser, inspect it and sending it back to the browser - or should #determineBehaviorByEvaluating always be used for that purpose? Thanks, Tomaz

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ifCurtailed prompts debug window
by Vitor Medina Cruz May 16, 2020

May 16, 2020

Hello, On Windows 10 and Pharo 8, If I do: [ Error signal ] ifCurtailed: [ Transcript show: 'error' ]. the debug window pops up, when I close, 'error' is print in the Transcript. If I do [ Error signal ] on: Error do: [ Transcript show: 'error' ]. 'error' is print in Transcript without debug windows pops up. I was expecting the same behavior here, as if ifCurtailed was a syntax sugar for on:do:, that is not the case or it is some kind of error? The way it is, I cannot use ifCurtailed because I don't want the debug window to pup up. Regards, Vitor

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Re: [Pharo-users] mentor question 4
by Trygve Reenskaug May 15, 2020

May 15, 2020

*Â A coding experiment.* Consider a Scrum development environment. Every programming team has an end user as a member. The team's task is to code a credit card validity check. A first goal is that the user representative shall read the code and agree that it is a correct rendering of their code checker: Â Â Â luhnTest: trialNumber Â Â Â Â Â Â | s1 odd s2 even charValue reverse | ----------------------------------------------- /" Luhn test according to Rosetta" "Reverse the order of the digits in the number."/ Â Â Â reverse := trialNumber reversed. /"Take the first, third, ... and every other odd digit in the reversed digits and sum them to form the partial sum s1"/ Â Â Â s1 := 0. Â Â Â odd := true. Â Â Â reverse do: Â Â Â Â Â Â [:char | Â Â Â Â Â Â Â Â Â odd Â Â Â Â Â Â Â Â Â Â Â Â ifTrue: [ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s1 := s1 + char digitValue. Â Â Â Â Â Â Â Â Â Â Â Â ]. Â Â Â Â Â Â Â Â Â Â Â Â odd := odd not Â Â Â Â Â Â ]. /"Taking the second, fourth ... and every other even digit in the reversed digits: Multiply each digit by two and sum the digits if the answer is greater than nine to form partial sums for the even digits" Â Â Â "The subtracting 9 gives the same answer. " "Sum the partial sums of the even digits to form s2"/ Â Â Â s2 := 0. Â Â Â even := false. Â Â Â reverse do: Â Â Â Â Â Â [:char | Â Â Â Â Â Â Â Â Â even Â Â Â Â Â Â Â Â Â Â Â Â ifTrue: [ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â charValue := char digitValue * 2. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â charValue > 9 ifTrue: [charValue := charValue - 9]. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â s2 := s2 + charValue Â Â Â Â Â Â Â Â Â Â Â Â ]. Â Â Â Â Â Â Â Â Â Â Â Â even := even not Â Â Â Â Â Â ]. /"If s1 + s2 ends in zero then the original number is in the form of a valid credit card number as verified by the Luhn test."/ Â Â Â ^(s1 + s2) asString last = $0 --------------------------------- Once this step is completed, the next step will be to make the code right without altering the algorithm (refactoring). The result should be readable and follow the team's conventions. P.S. code attached.

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Re: [Pharo-users] Code completion in blocks (Pharo8)
by Guillermo Polito May 15, 2020

May 15, 2020

Hi Davide, Iâm not sure if that works on Pharo8. Could you try quickly Pharo9 to see if thatâs fixed there? Iâve made a pass on the code completion there.. Donât know how difficult it would be to back port it, I could give you the pointers if you want. > El 6 may 2020, a las 12:24, Davide Varvello via Pharo-users <pharo-users(a)lists.pharo.org> escribiÃ³: > > > De: Davide Varvello <varvello(a)yahoo.com> > Asunto: Re: Code completion in blocks (Pharo8) > Fecha: 6 de mayo de 2020, 12:24:46 CEST > Para: pharo-users(a)lists.pharo.org > > > nobody? > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > >

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[ANN] Pharo Compendium
by Torsten Bergmann May 15, 2020

May 15, 2020

Hi, time flows and Pharo-Project is improving on all ends since its inception in 2008. As you know over time for the code project hosting we used SqueakSource, SS3 repos and other and later switched to SmalltalkHub available on http://smalltalkhub.com. Starting with Iceberg in Pharo 6 many community projects are now hosted elsewhere - most of them moved to GitHub. Pharo's git support allows also for GitLab, BitBucket and other git hosting services. I still think easy and quick accessibility to external (re)sources directly from the image is key - especially for new users who often get lost among all the various things that are available. Back in 2013 I therefore provided a small tool called ConfigBrowser as a replacement for MetacelloConfigurationBrowser to easily load Metacello configs directly into Pharo. Later we improved quick loading with a primary tool called "Catalog" written by Esteban. Catalog is indexing every 24 hours all configs within specific meta-repositories on SmalltalkHub (per Pharo version) like http://www.smalltalkhub.com/#!/~Pharo/MetaRepoForPharo80 to automatically build http://catalog.pharo.org/ and also a JSON source http://catalog.pharo.org/catalog/json The last one feeds the catalog browser and catalog spotter search within the Pharo image. So Catalog helped us and especially new Pharo users to find what is available as external project or package. Unfortunately some package maintainers are too lazy and do not maintain their configs over old and new Pharo versions. Also SmalltalkHub.com is now seen as legacy and will only be available in a read only mode or as a browseable archive soon. So we have to think about others steps beyond Catalog and (triggered by a recent discussion on Discord) I started now a simple tool that helped me finding all GitHub projects marked with "pharo" as GitHub topic. I additionally also added previous catalog loading. More sources could be added as well as some kind of custom stores/plugins. Maybe this tool could be the base for a future replacement of the catalog tool. Long story short - let me introduce "Pharo Compendium": Compendium is a new UI tool to list, browse and load Pharo artefacts from the web like: - GitHub Projects - Catalog Projects and other By default there are two plugin packages available for GitHub and Catalog - but you can implement own ones easily to connect to other sources on the web. Compendium is available on: https://github.com/astares/Pharo-Compendium It is implemented using the new Spec2 UI framework - so you need a recent Pharo 9 image to give it a try. Just run: Metacello new repository: 'github://astares/Pharo-Compendium/src'; baseline: 'Compendium'; load to load the tool. Then go to "Tools" -> "Compendium Browser". Attached is a screenshot demoing the primary functionality. If you want your GitHub project to be listed in the tool you simply need to add the topic "pharo" to the GitHub repository on the GitHub webpage. Feel free to comment or help improving the tool by sending PR's. Thx T. (aka astares)

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Covid-19 Tracker with PharoJS
by Noury Bouraqadi May 15, 2020

May 15, 2020

Hi, Dave Mason did implement a COVID-19 tracker with PharoJS. https://covid.cs.ryerson.ca/compare/ <https://covid.cs.ryerson.ca/compare/> Noury

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May 15, 2020

Hello we are happy to announce a new little book that we hope will help you to master git and Pharo. http://books.pharo.org/booklet-ManageCode/pdf/2020-05-12-ManageCode.pdf <http://books.pharo.org/booklet-ManageCode/pdf/2020-05-12-ManageCode.pdf> Thanks for your reading. S. BTW if you like my pharo free books you can donate at http://stephane.ducasse.free.fr/FreeBooks.html <http://stephane.ducasse.free.fr/FreeBooks.html> -------------------------------------------- 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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Artefact: special characters related issue
by EVELYN CUSI LOPEZ May 14, 2020

May 14, 2020

Hello all, We are working with artefact, but we have a problem when using special characters in text, since when entering text with special characters (i.e.cÃ§ÄÄeÃ©eÃ¨Ã«ÃªÄÄ ) the PDF is generated in white. Below, you may find a small example to replicate this error: -=-=-==-=-=-==-=-=-==-=-=-==-=-=-==-=-=-== PDFDemos class >> specialCharacterTest "PDFDemos specialCharacterTest" <script> self new specialCharacterTest: (self streamNamed: 'specialCharacterTest.pdf') PDFDemos >> specialCharacterTest: aStream | pdfdoc aPage | pdfdoc := PDFDocument new. aPage := PDFPage new. aPage add: (PDFTextElement new from: 20 mm @ 82 mm; text: 'cÃ§ÄÄeÃ©eÃ¨Ã«ÃªÄÄ'). pdfdoc add: aPage. pdfdoc exportTo: aStream -=-=-==-=-=-==-=-=-==-=-=-==-=-=-==-=-=-== We have already tried different types of encoding, without success since we only obtain text with empty spaces or with foreign characters - Do you have any clue to address this error? Any help is very welcome, thanks [image: :slight_smile:]

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May 14, 2020

I should go over it because I was working on the mooc and now I should remove all the discussion about Monticello You should have a look at the new chapters about git in PBE 80 of 2020 :) > I read the section in 2018-09-29-UPDATEDPHAROBYEXAMPLE: > > "Monticello packagesâ just after Figure 3-27 > > I have a smalltalkhub account and created a repository: > MCHttpRepository > location: 'http://smalltalkhub.com/mc/MichaelKentBurns/FredsLunch/main' > user: '' > password: â' > > In Pharo I registered this as a new smalltalkhub repository: > 'http://smalltalkhub.com/mc/MichaelKentBurns/FredsLunch/mainâ > > And it shows up in the repository list for my package. > > Then I think Iâm supposed to poke âSaveâ. > It was kind of sketchy and popped up exception dialogs while I was typing my comment, but eventually it worked. > > I was able to download the resultant .mcz file and unzip it, then change the ^M to newlines to get a readable source. > > Iâm not really happy about this process. > > I would like to actually save this into my GitHub repository. > The document mentioned at the top mentions using git, but just says: > > There is a chapter in preparation on how to use Git with Pharo. Request it on the Pharo mailing list. > > Question 1: Is there such a document? If so, can you point me to it? > > Question 2: Is there a way to fileOut a class, or a package? > > > > -------------------------------------------- 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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