April 2016 - Pharo-users - lists.pharo.org

Slack invitation
by Damien Cassou April 5, 2016

April 5, 2016

Hi, can someone please invite me to pharoproject on slack? Thanks -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." --Winston Churchill

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STON materialization corrupts a dictionary if the keys are references
by Peter UhnÃ¡k April 5, 2016

April 5, 2016

Hi, I ran into a problem with STON that seems to corrupt on materialization. Consider the following script: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ c := OrderedCollection with: UUID new. d := Dictionary with: c first -> nil. o := { c . d }. s := STON toStringPretty: o. o2 := STON reader allowComplexMapKeys: true; on: s readStream; next. o2 second keys. "an Array(an UUID('571bbfb7-78b9-430c-9aad-3e0088a25f4c'))" o2 second printString. "KeyNotFound: key an UUID(''571bbfb7-78b9-430c-9aad-3e0088a25f4c'') not found in Dictionary" o2 second at: o2 second keys first. "the same error" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So even though it contains the key it fails to access it. Interestingly enough if I serialize and materialize the "broken" dictionary again it suddenly works again. Thanks, Peter

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From vwnc interesting..
by S Krish April 4, 2016

April 4, 2016

| x y | x := 2.0. [x > 0] whileTrue: [x := x / 2]. y := -2.0. [y < 0] whileTrue: [y := y / 2]. (x = 0.0) -> (x = y) -> ((x basicAt: 1) = (y basicAt: 1)) printIt returns true->true->false and: x = 0.0 and y = -0.0 the negative 0.0 https://en.wikipedia.org/wiki/Signed_zero <https://urldefense.proofpoint.com/v2/url?u=https-3A__en.wikipedia.org_wiki_…>

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Detecting a class is abstract
by Hilaire April 4, 2016

April 4, 2016

Hi, Can Nautilius indicate when a class is abstract (i.e. at least one method in the class, then its hierarchy is definted respond subclassResponsability?) I did not find it in the Analyze menu. Thanks Hilaire -- Dr. Geo http://drgeo.eu

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SMTPClient further - kind of answer
by Robert Kuszinger April 3, 2016

April 3, 2016

Hello, A few days ago I've posted an SMTP related question about timeouts. (SMTPClient sending). I was able the repeat the situation on Linux as well with Postfix SMTP server on the other side (The original question was Windows / Exchange Server) Now smtp works and there are two consequences, at least for Pharo/Seaside beginners like I am :) - Using Halt for debugging in such a Seaside project when sending SMTPClient emails could make this timeout. It waits for signal not coming and it maybe related to timeout handling inside what I don't understand. If you face SMTPClient timeout in the DATA phase of sending an email check if you are debugging (in debugger window, using halts, etc) and try without that (eg. Transcript show: logs or something else to check what is going on). - Pay extra attention to email mime type and content encoding including subject string of the message. Since I'm sending hungarian language emails it was essential. Server answers and sensitivity on exotic email messages depends on the SMTP server implementation in question, but staying minimal on smtp fields is always a good idea. Specify To: and From: fields in the DATA part also. When I created correct email DATA part with correct encoding and removed debugging from the Seaside application code (so debugger was not active when run into SMTP sending) emails started to go out with no problem. good night R

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Tables in Pillar
by phil＠highoctane.be April 3, 2016

April 3, 2016

How is one doing a cell with content wrapping on multiple lines? With the | X | Y | abcd | some very long text that should be wrapping but apparently doesn't. So it is very annoying when one attempts to describe a long thing, which is one purpose for a table. I get one single line for each entry. How to do that? TIA Phil

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STON UUID in the key
by Peter UhnÃ¡k April 2, 2016

April 2, 2016

Why does this fail? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ STON fromString: ( STON toStringPretty: (Dictionary with: UUID new -> nil) ) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I would assume that if it can be serialized, then it should be also parsable. Having scalars for keys is JSON (and JavaScript) limitation because it's stupid, but if Smalltalk can have any hashable object for key (so any object), then it should be also possible to STON it in/out. Would this be hard to change? Peter

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Re: [Pharo-users] OpenGL project
by Thibault Raffaillac April 1, 2016

April 1, 2016

There's (hopefully!) no question of throwing it away already. That represents too much work, and pretty good design choices IMO. Yet I'm still pretty new to Pharo/Smalltalk so simply need time. At the moment I am only practicing on a GLFW binding. Now, I do believe in OpenGL and hardware rendering in general (vs software & framebuffer stuff), but these APIs are constantly evolving (with hardware, market needs, ...), with driver manufacturers having little care about backward compatibility. This means in that sea of innovations we have to spot the few key technologies which are going to last long enough to be still in use by the time they reach Pharo users (think of tesselation, or geometry shaders, hardly heard of nowadays). OpenGL ES 2 is such a key tech, I think, for its wide adoption in Android, iOS, RasPi. Still, there is no doubt it is going to be ditched too in a decade or so (command buffers are already being reintroduced in Vulkan...), and then in Pharo. With that in mind, my point is to make it as few and small classes as possible, to make it easier (and faster!) to ditch them later when a new key tech arises. That said, I'm looking for least effort solution, so will still strive to replace NB with UFFI in generator. Cheers, Thibault > Why cutting things down to a subset? > You have all specs on Opengl.org .. all you have to do today is to import > xml file and generate proper ffi calls. You can, of course, add support of > OpenGL ES.. but why throwing away rest of spec? It just a spec.. you don't > have to use it if you don't need it. Instead, if that feels too big - you > can do it smarter way: > - make package/subpackage/classes for ES edition and for full edition. > It shouldn't cause much trouble if you do it right. > Because throwing away is easiest part - but making something that will > serve for years .. harder, because tomorrow someone else can come and throw > your stuff away :) > OpenGL is around for years now.. and i don't think ES edition will replace > standard.. I would prefer to be able to access to full OpenGL > functionality, at a day i will need it.. why cutting things down? > > There's many ways to do things in smart way so, nothing will be lost. > If you don't want/can't maintain or support full OpenGL support - that's > another story. Then just don't call your project OpenGL - it will cause > confusion to those who expecting things to work out of the box, and finding > out it just OpenGL ES.. > > > > My advise is don't worry about backward compatibility , make it easy, make > > it simple. Don't be afraid to code some of it in C if you have to. > > Sometimes it's far easier to use C than Pharo. Pharo is no magic wand. > > > > > Yep, make it work. That's all what matters.

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[ANN] OS-Linux-CentOS
by Torsten Bergmann April 1, 2016

April 1, 2016

Hi, the OS-xxx series with (so far) - OS-Windows - OS-Linux-Ubuntu - OS-Unix - OS-Raspbian now has a new member called "OS-Linux-CentOS" which is more or less an adopted/customized pendant to "OS-Linux-Ubuntu". Project page is at http://www.smalltalkhub.com/#!/~OS/OS-Linux-CentOS Ready for Pharo 5. As ever you can load from Catalog tool or directly by entering "CentOS" into the Spotter search tool. Enjoy the video: https://www.youtube.com/watch?v=nAwtVeoll_k Bye T.

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[ANN] Search and open Unix man pages in Pharo (using OSUnix project)
by Torsten Bergmann April 1, 2016

April 1, 2016

I added the possibility to search and open Unix man pages (commands, functions and header files) directly from Pharo Spotter. You will find it in the updated version of my OSUnix support package in catalog (Pharo 5) https://www.youtube.com/watch?v=81eehVO14KU Have fun T.

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