February 2019 - Pharo-users

Pragma "only for place of definition", is there one?
by Herby VojÄÃk Feb. 16, 2019

Feb. 16, 2019

Hi! I'd just like to know if there is some pragma (eg. <onlyForMe>) which would say to a (class-level) method only to use the code in the case self is method definition class, otherwise just delegate to super. I only see it useful in class-side `initialize` method, as in: Foo class >> initialize self == Foo ifTrue: [ registry := Dictionary new ]. ^ super initialize would be Foo class >> initialize <onlyForMe> registry := Dictionary new Asking because I look for a way to easily subclass JS classes in Amber and such pragma would be useful in such cases, and since Amber treats Pharo as a reference, asking for the name of the pragma if there is one. Thanks, Herby

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How do I find the RPackageTag of a class?
by Tim Mackinnon Feb. 16, 2019

Feb. 16, 2019

Iâm trying to understand how RPackage and RPackageTag work in Pharo7? It seems different than Pharo6 at least with Nautilus (vs Calypso) - as previously the Nautilus UI gave me the RPacakgeTag, and I could just work with that. Calypso doesnât seem to give me the tag object, but if I have a known class and I want to know its RPackageTag I canât see how you do it? It all seems rather messyâ¦. I can ask a class for its category - which just gives me a symbol of the form âmypackage-tagnameâ, and if I ask a class for its package, it will give me an RPackage(myPackage) - but that RPackage has a set of RPackageTags which just use the tagname (so not prefixed with "mypackage-â)? So am I really supposed to split the category name on â-â myself, and then select the correct RPackageTag? If I look at the RPackageTag tests - they all seem to use hard coded values and so donât really show you how you deal with the question above? It really seems quite messy? I naively thought that if I wanted a browser extension to deal with a selected package tag - and file out some classes in that tag (for exercism) - I could easily get the RPackageTag from any class and then use it? Tim

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Quality assistant
by Hilaire Feb. 16, 2019

Feb. 16, 2019

Hi How to turn off the quality assitant in the calypso browser? I don't find anymore the option in the settings browser. Hilaire -- Dr. Geo http://drgeo.eu

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Stability of Pharo 7 vs 6?
by Tim Mackinnon Feb. 15, 2019

Feb. 15, 2019

Iâm not sure if this is born out by others - but Iâm finding that Pharo 7 is a bit less stable than Pharo 6 - Iâm seeing quite a few seg-faults where the vm dies and terminates - both when the image is left running for a while, but also in fresh images where I do an Iceberg load of my projects. Iâve also seen a lot of weird things like corrupted fonts and keyboard focus/cursor keys not working properly. >From memory - I saw a lot less of this in Pharo 6 when I first moved to it. Possibly my usage is a bit different (although Iâm not sure) - but in all the cases above Iâm using OSX (HighSierra - so the same Mac OS as Pharo 6) - with the 64bit vm and running full screen. One thing that seems to help (but this is an early empirical observation) - if I save my image to a new name - this seems to help. So Iâm wondering if there might be something in the build process that has changed and is causing some sort of instability? I havenât done this long enough to really comment - but from all of the above, having a Pharo.1.image seemed to stop my problems. Possibly Iâve been unlucky - but of 7 images Iâve used in the last 2 weeks - 5 of them have had issues. I did notice that half of these images were the rc1 build 1436 setup (as I hadnât noticed that the blessed 7.0 stable image has a different version number (previously, the last builds in PL Pharo 7 development - was the stable version - unless work then went forward for a Pharo 7.1. I liked to nab the dev version so that I know the build number to report it. I now see the about Pharo in the image also lists this number). Also some of my images were retrieved via zeroConf in the terminal (again, not sure if this makes a difference - but did that a lot with P6 too). This isnât a complaint per se - as we need to move the platform forward and forge new approaches. So I really mention it to try and help diagnose the issues - or possibly understand if Iâm doing something weird. Tim

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[ANN] P3 version 1.2
by Sven Van Caekenberghe Feb. 14, 2019

Feb. 14, 2019

Hi, There is a new release of P3, the modern, lean and mean PostgreSQL client for Pharo. https://github.com/svenvc/P3 Version 1.2 contains the following changes: - P3PreparedStatement is now joined by a polymorphic P3FormattedStatement working client side on text strings - P3PreparedStatement & P3FormattedStatement now share the same double dispatch mechanism to process argument binding - Added convenience methods #listDatabases #listSchemas & #listTablesInSchema: to P3Client - Added convenience methods #firstColumnData & #firstFieldOfFirstRecord to P3Result - Added dynamic ENUM support via #loadEnums in P3Client - Add support for the 7 geometric types POINT, CIRCLE, LINE, LSEG, POLYGON & PATH with corresponding objects P3Point, P3Circle, P3Line, P3LineSegment, P3Polygon & P3Path - Add support for the INTERVAL type with P3Interval object - Added P3Client>>#serverVersion accessor - Add support for BIT & VARBIT types with P3FixedBitString & P3BitString objects - Add TIMETZ support - Organised P3 package with tags - More & better documentation & unit tests https://github.com/svenvc/P3/releases/tag/v1.2 The quality of open source software is determined by it being alive, supported and maintained. The first way to help is to simply use P3 in your projects and report back about your successes and the issues that you encounter. You can ask questions on the Pharo mailing lists. Enjoy, Sven -- Sven Van Caekenberghe Proudly supporting Pharo http://pharo.org http://association.pharo.org http://consortium.pharo.org

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Status of XML Support's move to GitHub
by Sven Van Caekenberghe Feb. 14, 2019

Feb. 14, 2019

Hi, What is the status of XML Support's move to GitHub ? Many people were pro, has anything been done ? It would be very nice. Sven

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pathSegments of workingDirectory?
by David Richards Feb. 14, 2019

Feb. 14, 2019

Hi community, Consider: | file | file := FileLocator workingDirectory . file fullName . "==> '/Users/dr/Documents/Pharo/images/Study (Pharo 7.0 - 64bit stable)'" file pathSegments . "==> #()" How do we obtain path segments for the working directory? Is this an edge case where pathSegments does not return a semantically consistent value? Thanks David

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Traits for class methods?
by Konrad Hinsen Feb. 14, 2019

Feb. 14, 2019

Hi everyone, A quick question: is it possible to use traits to define class methods? For example, could the popular singleton pattern consisting of the three class methods #uniqueInstance, #new, and #reset plus the instance variable uniqueInstance be packaged as a trait? Konrad.

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Boostrap for seaside : incorrect JQuery version
by Dominique Dartois Feb. 13, 2019

Feb. 13, 2019

Hi all I installed seaside + Bootstrap from the Â« Catalog Browser Â», following the tips at http://smalltalkhub.com/#!/~TorstenBergmann/ I run Pharo 7 64bits on MacOS. The demo doesnât react to the mouse clicks. In fact Firefox debugger showed an incompatibility between Bootstrap and JQuery versions : The JQuery Pharo library is 3.3.1 : Is it possible to correct this just by using an older library of JQuery (if I can find one)? Thank you --- Dominique Dartois

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Running test
by Hilaire Feb. 13, 2019

Feb. 13, 2019

Hi, I need some testing on Mac OS and Windows, Linux should be fine, of a new bundle for drgeo. It is there https://www.dropbox.com/s/z2acnw1yi77q4ps/DrGeo.app-19.03a.zip?dl=0 I just need to know if it running or not. Thanks Hilaire -- Dr. Geo http://drgeo.eu

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