March 2018 - Pharo-users - lists.pharo.org

PharoLauncher image loading error
by H. Fernandes April 1, 2018

April 1, 2018

Hi, On Mac OSX 10.12.6, when asking to load an image from the pharo launcher there is an error. see log Hilaire

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Namespaces and ASN1 types in Cryptography package
by Holger Freyther April 1, 2018

April 1, 2018

Hi, I was debugging some test failures and it turns out that my code defines an ASN1IntegerType and the Cryptography package (a dependency of MongoTalk which is loaded into my code) has such a class as well. Thanks to Epicea I could see which package added the method but now I have no idea how to resolve the problem. Mongotalk needs PBKDF2 for modern authentication... Could Cryptography use "ASN1-Model"[1] instead? This is a rather complete[2] ASN1 implementation and used in production for some years. Could the classes be prefixed? If not how can I instruct Metacello to not load a certain package? holger [1] http://smalltalkhub.com/#!/~NorbertHartl/ASN1/source [2] Rather complete parser for ASN1 files but only encoding/decoding for DER/BER (none of the modern ones like aper/uper

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What are RBPattern* classes in the AST?
by Steven Costiou March 31, 2018

March 31, 2018

Hi, i was browsing the classes of the AST and i am curious about the RBPattern* classes. What are they used for? The RBPatternParser's comment says that it is used "to search and transform source code". After looking a bit in the senders and class refs, it seems it is used for refactorings and other stuff. But is that used at some point in code compilation? Steven.

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Calypso and Dark Theme
by kmo March 31, 2018

March 31, 2018

Is anything being done to make Calypso work better with the Pharo Dark Theme? The dark blue labels against a dark background are unreadable - see screenshot. <http://forum.world.st/file/t368903/caldark.png> -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

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Reading data from a USB HID device
by Alistair Grant March 31, 2018

March 31, 2018

Hi Everyone, I've got a USB connected heart rate monitor that I'd like to access from Pharo. I found libusb-pharo at https://github.com/tamerescrl/libusb-pharo which appears to do exactly what I want. It was updated only 5 months ago, but doesn't load in Pharo 6.1 or 7, failing with package UFFI-dev not found. Does anyone have a better idea, or know if there is a working version available? Otherwise I'll have a go at getting it working in Pharo 7. Thanks! Alistair

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Migrator: to help you migrating to latest version of Pharo :)
by Stephane Ducasse March 30, 2018

March 30, 2018

Hi Today during the Pharo sprint I went over all the deprecated methods in Pharo 70 and Pharo 60 and I checked if I could convert the deprecated ones into deprecated:transformWith: so that the conversion is done automatically to help people migrating from one version to the other. I also collected all the deprecated methods as well as the new deprecated:transformWith: methods into a Package called Migrator (should still merge the Pharo 60 and Pharo 70 version). I plan to do the same for Pharo 50, 40, 30, 20. If you want to help feel free. At the end we will have one package containing all the deprecated methods of all the past versions. The way we will be able to support a smoother conversion to more recent version. Stef

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Question about GLORP class models
by Alejandro Infante March 29, 2018

March 29, 2018

Hi guys! Iâm trying to use GLORP and Iâm having problems defining the class model for a class which has an instance variable which is a collection of instances of two different classes: I have 3 classes named: { Section . Question . QuestionGroup } and I have problems for specifying the glorp class model for Section. Object subclass: #Section instanceVariableNames: âquestions ...' classVariableNames: '' The thing is that #questions instance variable is a collection of Question AND QuestionGroup. They have polymorphic behavior, but they have not a common superclass (besides Object). How does my class model should look like? classModelForSection: aClassModel ... aClassModel newAttributeNamed: #questions collectionOf: ****?. Thanks for the help! Cheers, Alejandro

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evaluate: with bindings
by Stephane Ducasse March 29, 2018

March 29, 2018

Hi Marcus I would like to be able to do the following: Compiler bindings: {'aValue' -> 33}; evaluate: 'aValue + aValue' and get 66 Is it possible? Stef

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Looking for small boards and tiny computers which can run Pharo
by Steven Costiou March 29, 2018

March 29, 2018

Hi, i am looking for: - small hardware, boards/computers, "embeddable" devices, etc. that can run Pharo (except Raspberry pi that i already know) - robots, flying drones or things alike with an open linux which can possibly run Pharo Could somebody points me to documentation or web sites where such things can be found ? Thanks, Steven.

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Zoom x-axis in RTGrapher?
by Alistair Grant March 29, 2018

March 29, 2018

Hi Everyone, I'm using RTGrapher to display a simple line graph where the x-axis has values from roughly 0 to 500,000 and the y-axis from 0 to 20. What I'd like to be able to do is to zoom in just the x-axis, i.e. instead of displaying the entire 0 to 500,000 range, be able to narrow it down in stages, to, e.g. 430,000 to 431,000. The y-axis would be unchanged, i.e. still 0 to 20. Ideally I could then scroll left and right along the x-axis. I can create a Spec widget with buttons to redraw the graph, but was wondering if there was a better way. Thanks, Alistair

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