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[ANN] 15/2: Pharo TechTalk: Contributing to Pharo 7
by Marcus Denker Feb. 13, 2018

Feb. 13, 2018

Pharo TechTalk: Contributing to Pharo 7 When? 15 Feb 2018 5:00 PM - 7:00 PM (UTC+01:00) What? Contributing to Pharo7 We will show: - How to submit issue tracker entries to the Pharo Issue Tracker - How to do a Pull Request if you want to do a fix or enhancment - How to review and comment other peoples fixes. https://association.pharo.org/event-2797065

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canonical way to convert Symbol into Class (retrieve class by its name)
by Peter UhnÃ¡k Feb. 13, 2018

Feb. 13, 2018

Hi, what is the canonical way to get a class from a symbol? a) Converting symbol into class via string protocol a.1) #Array asClass I use this the most, because it is easy, uses unary selector, and so far I've never ran into any issues. But apparently it is not good -- why? a.2) #Array asClassInEnvironment: Smalltalk globals b) Retriving the class by key from the system dictionary b.1) Smalltalk globals at: #Array b.2) Smalltalk at: #Array b.3) Smalltalk classNamed: #Array c) something else entirely? I get that using #asClass wouldn't work if there was a different environment, however I don't even know in what situation there could be a different environment, so I cannot assert how problematic it is or isn't. Thanks, Peter

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[Iliad] raw HTML in Iliad
by Siemen Baader Feb. 13, 2018

Feb. 13, 2018

Hi all, is there a way to render raw HTML from Iliad widgets, or perhaps mustache templates? I'm interested in not using the builders always because I use an external web editor that generates plain HTML and that has some advantages in my workflow. Is it possible do it with Seaside & Reef instead? -- Siemen

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How to have an in-image map (morph/spec/brick) showing a gps location
by CÃ©drick BÃ©ler Feb. 11, 2018

Feb. 11, 2018

Hello, I would like to have a representation of a map in the image to show (my) GPS coordinates. I havenât really tried nor searched yet but Iâve seen Roassal examples that could do the job, especially the Open Street Map integration. So does people here have advices on how to to that (having a morph that shows a map and positions) ? Ideally I would like to have it work offline (meaning I download first tilesâ¦or a vectorized map would do the job too). TIA, CÃ©drick

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ImageWorker error in P6.1
by Martin Dias Feb. 10, 2018

Feb. 10, 2018

Hello! The ImageWorker project, that provides the possibility to fork a OS process with a copy of current image, was working fine in Pharo 60400 but it's not working on latest 6.1. The output there is "External Image Failed: 256". Any hint? Steps to reproduce error: 1. download: curl get.pharo.org/60+vm | bash 2. load: Metacello new repository: 'http://www.smalltalkhub.com/mc/PharoExtras/ImageWorker/main'; configuration: 'ImageWorker'; version: #stable; load. 3. inspect: ImageWorker do: [ 1+2 ] within: 1 seconds onTimeout: [ self error: 'timeout' ]. Cheers, MartÃn

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Code formatting in CustomHelp
by CÃ©drick BÃ©ler Feb. 10, 2018

Feb. 10, 2018

Hi, Iâm doing some tutorials with the help system. In ProfStef, there is code formatting but not thrgouh the HelpBrowser. In CustomHelp sublclasses, itâs possible to have some formatting (heading:, bold:, â¦). Do you know if itâs possible to have a #code: method so as to use shout specifically ? It doesnât seem obvious to me. TIA CÃ©drick

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Websocket features
by Ben Coman Feb. 10, 2018

Feb. 10, 2018

@Sven, I'm new to websockets and don't properly grok all the features in columns here... https://en.wikipedia.org/wiki/Comparison_of_WebSocket_implementations but could you comment on which are provided by Zinc Websockets? cheers -ben

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Neural Network - Handwritten Digit Recognition
by Pierce Ng Feb. 10, 2018

Feb. 10, 2018

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

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Generate equality
by Herbert VojÄÃk Feb. 9, 2018

Feb. 9, 2018

Hi! Do you think it would be reasonable to have, a la "generate accessors" / "generate initialize method", a "generate equality" thingie that would generate #= and #hash for the method, mechanically? Just created a new "piece of data" class and felt like it would be helpful. Herby

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PetitParser: Building composed (dependent) parsers and isolating productions code
by Arturo Zambrano Feb. 8, 2018

Feb. 8, 2018

Hi All, Could you please share some advice on the following situation? I wrote my first Petit Parser. From the documentation I read that: 1) it is possible to depend on other parsers making the development more modular. 2) The docs also suggest that, in order to separate grammars rules from productions, we can make a parser with productions a subclass of a parser which defines the grammar. I started applying 1) so my structure is something like AbstractParser " contains some common basic elements common to all subclasses) StatementAParser StatementBParser PLParser "this guy uses the StatementX parsers" So there is a parser for different statements of the programming language. The PLParser uses PetitParser dependency mechanism to rely on the Statement*Parsers. For instance: PLParser>> ruleB ^ (self dependencyAt: StatementBParser) ruleB So far so good, the grammar is working, the parser works. Now, I would like to write the productions, separately from the grammar part (remember 2) ), so I should make subclasses adding the productions in the form >>ruleA ^super ruleA ===> [ my production code] The point is that PLParser explicitly depends on Statements*Parser, and the name of the Statement*Parser appears here and there, so creating subclasses would result in maintenance nightmare. The new layer of parsers with productions will duplicate the dependencies and I foresee it will be a mess. So now, I think that having just one big class with all the rules for the grammar is better if you plan to separate productions code isolated from the grammar. Am I right? Maybe I'm missing some point regarding writing composed parsers and separating productions from grammar. Any pointer or comment is welcome. Arturo

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