May 2015 - Pharo-users - lists.pharo.org

[ANN] Teapot 0.91
by Attila Magyar May 10, 2015

May 10, 2015

Hello, Teapot 0.91 released today. Teapot is micro web framework that focuses on simplicity and ease of use. Here's a summary of changes: - Routes and before/after filters may include conditions (see the example below) - Routes can be defined with /any:/ that serves as a wildcard matching any http method - Added /charSet:/ accessor to TeaResponse E.g. Teapot on GET: 'test' -> result; when: [:req | req accept = 'application/json']; start. More information: http://smalltalkhub.com/#!/~zeroflag/Teapot -- View this message in context: http://forum.world.st/ANN-Teapot-0-91-tp4825485.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Problem using Zinc in Pharo 4 (Moose 5.1)
by PBKResearch May 9, 2015

May 9, 2015

Hello I have been trying to use Soup class>> fromUrl: to access the contents of a web page. It halts with a message from Zinc about malformed UTF-8. The page displays perfectly in Firefox, so I copied the page source from there to a local file and tried to read it from there. Again a message from Zinc: 'Invalid utf8 input detected'. It's strange, because the page is not in UTF-8. The head contains: <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type">. I have tried to find how to specify the character set in reading files with Zinc, but without success.* If it's relevant, I am using Pharo4.0 Latest update: #40613, downloaded two days ago. The address of the web page is: http://kompakt.handelsblatt-service.com/ff/display.php?msgID=725164109 <http://kompakt.handelsblatt-service.com/ff/display.php?msgID=725164109&adr= peter(a)pbkresearch.co.uk> &adr=peter(a)pbkresearch.co.uk. Other pages from the same source are loaded and analysed with no problem. Processing this page seems to go off course as soon as it encounters the character code 246, which is a correct o-umlaut in ISO-8859-1. Any advice gratefully received. Peter Kenny *I would be happy with advice to RTFM, if someone would point out the relevant bit of the FM.

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initializeWith* and constructors
by Peter UhnÃ¡k May 9, 2015

May 9, 2015

It seems to me that Smalltalkers are not very fond of constructors and I can't comprehend why. If for example I want to create object X that _needs_ object Y, then I would have to make a Y accessor. X>>y: anY y := anY but this makes no sense as I can still change the `y` object at later date breaking everything. An alternative is having: X>>initializeWithY: anY y := anY. self initialize. X>>y: anY ^ self basicNew initalizeWithY: anY. However I see only 59 initializeWith* methods (in about 6 packages) compared to 2302 initialize methods. Thus I am deducing that doing this is not very common. Am I missing something or am I trying to unnecessarily constraint the user and I should just trustâ¢ him that he knows what he should use? As a user of an interface I would prefer not to have useless things available that would just break things. Thanks, Peter

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New fast path for proxy loading in Voyage
by Henrik Johansen May 9, 2015

May 9, 2015

Hi Esteban! As we talked about on IRC yesterday, I had hoped to employ the fast become discussed in http://forum.world.st/Igor-s-fast-become-for-CompiledMethods-in-Cog-td43455… <http://forum.world.st/Igor-s-fast-become-for-CompiledMethods-in-Cog-td43455…> to bring faster proxy loading untill Spur arrives. Sadly, it's not present in any current VM's, for reasons unknown*. Luckily, the alternative proposed by Levente in the original thread (http://forum.world.st/A-trick-to-speedup-become-but-not-becomeForward-tp370… <http://forum.world.st/A-trick-to-speedup-become-but-not-becomeForward-tp370…>) is appropriate for our case. As I don't have write-access to Voyage repo, I've attached the package with the changes (which work in both 3.0 and 4.0, but I assume not older, due to using the SlotBuilder for anon subclasses) The package comment contains a workspace doit for comparision, but long story short, for objects covered by the new fast path, you can now materialize more than million objects in the time it previously took to materialize five. Cheers, Henry *Need to check we aren't becoming primitive literals before being ok to include? Seriously? You can do ((StandardFileStream >> #primRead:into:startingAt:count:) literalAt: 1) at: 4 put: 34 to achieve the same that become apparently must at all costs guard against, does that mean we should also introduce the same kind of primitive fail check requirements to at:put:? I get that there are some objects you really don't want to become: due to VM linking them internally in various ways, but checks that apply to *certain instances* of a class, should be unneccessary, imho (or, better, done at the user site)

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Roassal multiline popupText ?
by phil＠highoctane.be May 8, 2015

May 8, 2015

I'd love to have multiline popupText. dsEvents := RTDataSet new. dsEvents interaction popupText: [ :point | 'coll: {1} - ts: {2} / {3} -- {4} - {5}' format: { key. (point ts asSeconds - start) printString. .... How can I do that? Looks like the thing is single line. TIA Phil

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Roassal Camp Smalltalk, July 12
by Alexandre Bergel May 8, 2015

May 8, 2015

Dear Colleagues and Friends, We are happy to announce we will organize a CampSmalltalk about the Roassal visualization engine, on _Sunday 12 July_. As far as we have seen, the interests are multiple. Here is a list of topics we will happy to work on: - Improving Grapher, our charting library - Fixing bugs, addressing recently uncovered issues (e.g., composite shapes) - HTML/JavaScript export Some participants have indicated a great interest in: - Port of Roassal on VisualWorks - Using Roassal on Gemstone If you wish to participate, get in touch with us. Since we will probably have a sponsoring of the event, it would be nice to know how many will attend to ease the logistic and the pizza ordering :-) Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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MorphicDraw, now with Spec, Glamour & PolyMorph
by Stephan Eggermont May 8, 2015

May 8, 2015

After starting with a PolyMorph window & toolbar, I've now added a Glamour and Spec one. Code: http://www.smalltalkhub.com/mc/StephanEggermont/MorphicDraw/main Documentation: https://github.com/StephanEggermont/MorphicDraw I find it difficult to explain the choices for event handling. I'm using both handleListenEvent: and mouseDown: and on:send:to: and haven't even started using announcements. What am I supposed to be using when, and what is supposed to be replaced in Bloc? Stephan

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Re: [Pharo-users] Can we have NeoCSV, and NeoJSON included in the base image?
by Andy Burnett May 7, 2015

May 7, 2015

> > Stephan Eggermont said: > <<< > > What is stopping you from adding a build 'Andy's Base Image' to the > Pharo-Contribution CI? > >>> Ignorance :-) I had no idea such a thing was possible. It sounds like the ideal solution. Is the process documented somewhere? Cheers Andy

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Building ObjVlisp language chapter
by Mark Rizun May 7, 2015

May 7, 2015

Hi guys! Currently, I'm following the chapter: "Building ObjVlisp a Minimal, Uniform and Reflective Object-Oriented Language Kernel" (http://sdmeta.gforge.inria.fr/Teaching/ObjVLisp/) While doing this exercise I realized how cool it is :) Anywhays, I encountered a little problem which I solved, so it's more like a comment/feedback: In section 1.7 Message Passing and Dynamic Lookup, there are mentioned several methods, that are not actually implemented. Moreover, the readers task is to implement method #lookup: selector. But the skeleton(mcz package in the link above) does not contain this method. In the end of this section, it is said, that you have to run #testNilWhenErrorInLookup and #testRaisesErrorSendWhenErrorInLookup test methods. But, they does not exist too:) However, in test class there is a category called "tests-MessagePassingsAndDynamicsLookup" and it uses method #lookup: selector for: anObjObject. This method is empty, and when I implemented it, all tests from message passing category become green. Eventually my comment about this is: I'm guessing that either chapter or code(mcz file in the link I mentioned) is not up to date. Does anyone know if the rest of the chapter/code is not up to date? Or maybe I made a mistake and just couldn't find what I had to? P.S. I really recommend to follow this chapter/exercise :) Best, Mark -- View this message in context: http://forum.world.st/Building-ObjVlisp-language-chapter-tp4823907.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[Ann] The Garage database driver API
by Guillermo Polito May 7, 2015

May 7, 2015

Hi all, I'm pleased to announce the release 0.1 of Garage, a database driver API. Garage is meant to be a common interface to access several database servers, in a JDBC style. The current version works in Pharo3 and Pharo4 and includes drivers for: - mysql (pure smalltalk) - postgres (pure smalltalk) - sqlite (using ffi) - opendbx (allowing connecting with several db vendors, using ffi) We have a nice test suite (that maybe you can help to enlarge) that is tested every day in Jenkins [1]. Also, in garage's website [2] you'll find - installation instructions - basic usage - documentation of features such as statements, transactions, cursored fetches. - issue tracker, backlog and other information Feedback (and contributions) are very welcome! Enjoy, Guille [1] https://ci.inria.fr/dbxtalk/view/Garage/ [2] http://guillep.github.io/DBXTalk/garage/

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