- Pharo-users - lists.pharo.org

Morph Code problem
by shawon58 March 22, 2020

March 22, 2020

i am new in morph code. so i try this code "Color orange asMorph openInWorld" . in my screen it shows a line but i cant able to close that. screen shot added below. thanks <http://forum.world.st/file/t372453/Capture.png> -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Json encoding
by Vitor Medina Cruz March 21, 2020

March 21, 2020

Hello, I know two projects of json encoding/decoding â NeoJson and STON. In Java I have two most used ones too: Gson and Jackson. Using those I can simply pass any object and it they can convert to a json string, the former can't deal with cycles, the latter can with some little config. NeoJson seems to be limited to primitives, for example, in Pharo 8 I can't run NeoJSONWriter toString: (Date today) > Since I got: NeoJSONMappingNotFound: No mapping found for Date in NeoJSONWriter > STON works fine with STON toString: (Date today). > but fail with: STON toJsonString: (Date today). > Also, STON fails if I try to serialize an object which contains an instance variable pointing to a block closure. I didn't find out how to ignore these instance variable as it is unnecessary for what I need at the moment. So, which lib for json or some object/string encoding/decoding should I be using on Pharo? Is there something better than those libs? Am I doing something wrong? My experience tells this should be simple, but it is not. Thanks in advance, Vitor

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Slots vs collections
by N. Bouraqadi March 21, 2020

March 21, 2020

Hi, Suppose I have an instance variable referencing a collection of booleans. I want to have all elements of the collection be stored as bits. Is there a way I can express it using slots? This idea can be generalized to other types of slots. Noury

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Morphs with Spec2
by Sebastian Jordan March 20, 2020

March 20, 2020

Hi everyone, I Want to use a StringMorph as a title of a UI created with Spec2. For that, I am using a SpMorhPresenter inside a SpPresenter. But the text inside the morph loses its format as it is shown in the attached image. Does anyone knows how to solve this? What I am doing wrong? It would be very appreciated. Thanks for your time. Here is the code of the example: defaultSpec ^ SpBoxLayout newVertical add: #morphLabel; add: #button1; add: #button2; yourself initializePresenters morphLabel := self obtainSpMorphPresenterwithAStringMorph. button1 := self newButton. button1 label: 'Button one'. button2 := self newButton. button2 label: 'Button two'. self focusOrder add: morphLabel; add: button1; add: button2 obtainSpMorphPresenterwithAStringMorph | morph | morph := StringMorph contents: 'A String Morph' font: (LogicalFont familyName: Smalltalk ui theme labelFont familyName pointSize: Smalltalk ui theme labelFont pointSize + 10). ^ SpMorphPresenter new morph: morph; yourself

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Best ways to retrieve JSON objects from a feed?
by Tim Mackinnon March 20, 2020

March 20, 2020

Hi everyone, Iâm finally finding some space from world chaos and looking more into Pharo, and I have a question about retrieving json data from feeds - how is the best way to elegantly parse it - e.g. I am doing : url := ZnUrl fromString: 'http://climatedataapi.worldbank.org/climateweb/rest/v1/country/annualavg/pr…. url addPathSegments: {aDate1 asString. aDate2 asString. aCountryCode}. result := ZnEasy get: url. content := STONJSON fromString: result contents. ... However I was kind of surprised there wasn't something on a ZnResponse for getting json objects e.g. result getJsonObjects or something like that? Itâs so common I wonder if I am missing some trick? What arenât there helpers in place for this or is there a better way to do this that I havenât found yet? I was kind of thinking something like (which obviously I can add myself) result asJsonObjects sum: [:obj | (obj at: âannualDataâ) first ] Tim

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[ANN] COVID-19 and JRMPC
by Richard Kenneth Eng March 19, 2020

March 19, 2020

https://smalltalk.tech.blog/2020/03/13/covid-19-and-jrmpc/ This is very unfortunate. I was counting on the awards ceremony for a great deal of PR value. A virtual ceremony likely wouldn't have the same impact. Richard

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Re: [Pharo-users] [Roassal3 Script of the day] Visualizing Coronavirus official public data
by phil＠highoctane.be March 18, 2020

March 18, 2020

Hello, The script is failing today due to: [image: image.png] Phil á§ On Mon, Mar 16, 2020 at 7:45 PM Alexandre Bergel via Pharo-users < pharo-users(a)lists.pharo.org> wrote: > The script I provide could be easily wrapped up into some classes. Maybe I > will use it for a new tutorial. > > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > On 16-03-2020, at 12:38, HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> > wrote: > > > > Thank you Alexandre, I've been asking myself how to do it in Roassal3 in > a better way as you did!! > > Cheers, > > > > HernÃ¡n > > > > El lun., 16 mar. 2020 a las 12:31, Alexandre Bergel via Pharo-users (< > pharo-users(a)lists.pharo.org>) escribiÃ³: > > Hola, > > > > Here is a script, for which I hope some of you will find useful. > > The script of today visualize the number of infected and allows for an > easily (and very basic) comparison. First, you need Roassal3 and DataFrame. > Here is the code: > > > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > Metacello new > > baseline: 'Roassal3'; > > repository: 'github://ObjectProfile/Roassal3'; > > load. > > Metacello new > > baseline: 'DataFrame'; > > repository: 'github://PolyMathOrg/DataFrame:v2.0/src'; > > load. > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > Then, evaluate the Pharo code available on: > > > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > https://gist.github.com/bergel/6ebcde9696ef922f2b519c56a4520bac > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > > > > You should then see the following: > > <PastedGraphic-6.png> > > > > Change the names of the countries to see what you are interested in. > > > > Stay safe > > Alexandre > > -- > > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > > Alexandre Bergel http://www.bergel.eu > > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > > > > >

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Re: [Pharo-users] Any existing RDF implementation in Pharo?
by Christian Haider March 17, 2020

March 17, 2020

Hi, I did one for VisualWorks: https://wiki.pdftalk.de/doku.php?id=rdf Happy hacking, Christian Von: Pharo-users <pharo-users-bounces(a)lists.pharo.org> Im Auftrag von Juraj Kubelka via Pharo-users Gesendet: Montag, 16. MÃ¤rz 2020 13:41 An: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> Cc: Juraj Kubelka <juraj.kubelka(a)icloud.com> Betreff: [Pharo-users] Any existing RDF implementation in Pharo?

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March 17, 2020

Hello, from what I remember, this would require porting the pdf lib of christian as Values one of the underlying framework. But not a straight task though I thing that would be a nice addition :) Cheers, CÃ©drick (@athome) > Le 17 mars 2020 Ã 10:22, Juraj Kubelka via Pharo-users <pharo-users(a)lists.pharo.org> a Ã©crit : > > > De: Juraj Kubelka <juraj.kubelka(a)icloud.com> > Objet: Re : [Pharo-users] Any existing RDF implementation in Pharo? > Date: 17 mars 2020 Ã 10:22:29 UTC+1 > Ã: Christian Haider <christian.haider(a)smalltalked-visuals.com> > Cc: Any question about pharo is welcome <pharo-users(a)lists.pharo.org> > > > Hi Christian, > > thank you for the link to you project? If I understand it well, I need the latest VisualWorks and I find the project in the public store, right? > > Have you also tried to migrate it to Pharo as Esteban suggests? What is the status? > > Best, > Juraj > >> On 16 Mar 2020, at 11:53, Christian Haider <christian.haider(a)smalltalked-visuals.com <mailto:christian.haider@smalltalked-visuals.com>> wrote: >> >> Hi, >> >> I did one for VisualWorks: https://wiki.pdftalk.de/doku.php?id=rdf <https://wiki.pdftalk.de/doku.php?id=rdf> >> >> Happy hacking, >> Christian >> >> >> Von: Pharo-users <pharo-users-bounces(a)lists.pharo.org <mailto:pharo-users-bounces@lists.pharo.org>> Im Auftrag von Juraj Kubelka via Pharo-users >> Gesendet: Montag, 16. MÃ¤rz 2020 13:41 >> An: Any question about pharo is welcome <pharo-users(a)lists.pharo.org <mailto:pharo-users@lists.pharo.org>> >> Cc: Juraj Kubelka <juraj.kubelka(a)icloud.com <mailto:juraj.kubelka@icloud.com>> >> Betreff: [Pharo-users] Any existing RDF implementation in Pharo? > > >

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Stale SQLite connection
by Jeff Gray March 16, 2020

March 16, 2020

In my code I'm opening a sqlite connection and keeping it open rather than opening and closing one on each transaction. Generally it's working well. I often save and close my image. When I then reopen the image I still have a connection and it says it's open, but using it gives me an error. This is easily recovered. I just open a new connection. Is there a way I can see if a connection is still good, in my code? Or should I be opening and closing connections every transaction? I haven't benchmarked it but I'm assuming it would be slower. I guess I could set my connection to nil in a start-up script. That would cause my code to get a new connection after a break from development. Any recommendations? Thanks, Jeff. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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