December 2015 - Pharo-users

Halo Menu On Spec Tree Node
by Craig Johnson Jan. 6, 2016

Jan. 6, 2016

Hi All, I had an issue - when I opened a Halo on a Spec tree node in the UI and select the menu Icon, I got a DNU message. However if I selected a normal Morph, the menu Icon worked fine. I'm using Pharo 4.0 released version. Fixed this by changing TreeModel>>iconFor to: iconFor: aNode ^ iconBlock value cull: aNode content*s* cull: aNode Craig

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Dolphin Smalltalk open-sourced...
by SaÅ¡a JaniÅ¡ka Jan. 5, 2016

Jan. 5, 2016

...with MIT license, so I wonder if that will have some impact on further development of Pharo? Iirc, Dolphin can produce stand-alone Windows executable, but maybe something else can be utilized as well? Here is the link with:Â http://object-arts.com/gettingstarted.html Sincerely, Gour -- The humble sages, by virtue of true knowledge, see with equal vision a learned and gentle brÄhmana, a cow, an elephant, a dog and a dog-eater.

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Determining if a Process is waiting on a Semaphore
by Ben Coman Jan. 5, 2016

Jan. 5, 2016

Looking at at the primitive comment in... Semaphore>>wait "excessSignals>0 ifTrue: [excessSignals := excessSignals-1] ifFalse: [self addLastLink: Processor activeProcess suspend]" I expected/hoped the following... Transcript clear. s := Semaphore new. p := [ Transcript crShow: '1'. s wait. Transcript crShow: '2' ] forkAt: 50. Transcript crShow: p isSuspended. s signal. would produce 1 true 2 but I get 1 false 2 How do I determine from another thread if a Process is waiting on a Semaphore, or even better, waiting on a particular semaphore? cheers -ben

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Versionner and package dependencies
by Ferlicot D. Cyril Jan. 4, 2016

Jan. 4, 2016

Hi, I wanted to use versionner to manage some existing configurations but in one of these configuration there is some dependencies on packages that have no project. For example in the baseline there is: spec package: 'Glamour-EyeSee-Presentations' with: [ spec requires: #('EyeSee'). spec repository: 'http://smalltalkhub.com/mc/Moose/Glamour/main' ]. But in versionner I can only add a project as dependency. Is there a way to do such a thing or is it a future feature of versionner? -- Cyril Ferlicot http://www.synectique.eu 165 Avenue Bretagne Lille 59000 France

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[IMPORTANT] Starting migration to Spur VM
by Esteban Lorenzano Jan. 3, 2016

Jan. 3, 2016

We will start migration to Spur today. To complete it, we will require some time, specially to adapt the CI and check everything is ok. Spur will allow us to do a big step forward in Pharo development, in the concrete you will see it immediately for this: - We have noticed a speed increment of 100% in tiny benchmarks (and according to Eliot, it will be at least 35% in general on the system). - No more GC stops (noticeable when running large systems) - We will be able to scale our systems up to 2G memory consumption without loosing performance. But, this will have some drawbacks in the first times: 1) VM will not be compatible between versions anymore: Pharo 5.0 will have a Pharo Spur VM associated (and they are not compatible). - There WILL NOT be a "non-spur" version of Pharo 5.0. Once completed the transitions, this will be the only one. 2) NativeBoost-FFI implementation has been replaced with a new implementation who relies in ThreadedFFIPlugin and IA32Plugin. While we worked a lot to do this transition as painless as possible and we achieve a good level of backward compatibility (most uses of #nbCall: should work out of the box), there are some problems we cannot solve: - there are some stuff not possible to compatibilise, notably: - Structures now need to inherit from FFIExternalStructure - Arrays now are now shadowed - in general is a bit slower (impossible to compete with ASM) but in general is not perceptible. - THERE WILL BE BUGS AND NON-IMPLEMENTED FEATURES: Current implementation is validated with Athens and even Roassal was working, but of course that does not covers all cases. 2.1) ASMJIT will be removed from system and put in a separated packages. NOTE: There will be a blog post explaining FFI-NB architecture during the week. 3) There are more or less 70 new failing tests, some of them important than we need to fix as soon as possible. Please, please, please, help us with them :) 4) In general we foresee the system will became unstable some weeks, before it gets back to normal. Please be patient. 5) You will need to adapt your Pharo 5.0 related apps and CI processes (to take care about new VM). Some programs will stop work at all (for example, I think Pharo-launcher will need to be adapted).

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Pharo 5: Bug in removing key combinations
by Johan Fabry Dec. 30, 2015

Dec. 30, 2015

Hi all, Miguel and I found a bug in removing key combinations on a morph. Now they are global, while in Pharo 4 this was not the case. Consider the following code: | morph | morph := RubScrolledTextMorph new. (morph textArea) removeKeyCombination: $s command; removeKeyCombination: $s control; on: $s command do: [morph flash ]; on: $s control do: [morph flash ]. morph openInWorld. In the morph, cmd-s will cause a flash, as expected. However in other windows (or browsers and playgrounds least) the original shortcut is lost, only a s character is added to the text field. I did not see it on fogbugz so I would like to announce it here before I open a case, in case (heh) I missed it. So the question: is this a known bug? ---> Save our in-boxes! http://emailcharter.org <--- Johan Fabry - http://pleiad.cl/~jfabry PLEIAD and RyCh labs - Computer Science Department (DCC) - University of Chile

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Block that doesn't leak memory
by webwarrior Dec. 29, 2015

Dec. 29, 2015

BlockClosure objects hold reference to object that created them via outerContext receiver. This can cause memory leaks when moving blocks around/deepcopying/serializing. Is there a way to get "lightweight" block that has empty outerContext (like when executing code in Playground) or is there another class for such "lightweight" blocks somewhere? Obviously I'm talking about blocks that don't reference variables in enclosing scope and don't do nonlocal return. -- View this message in context: http://forum.world.st/Block-that-doesn-t-leak-memory-tp4868529.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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[OT] Dolphin 7 opensourced
by Torsten Bergmann Dec. 29, 2015

Dec. 29, 2015

Hi, just as an info and in case you missed it but might be interested: Dolphin Smalltalk for Windows 7 will be released open source (MIT licensed) on GitHub today ([1]/[2]). The sources for both the image and the virtual machine will be available. For those who do not know it: Dolphin is a Smalltalk system for Windows provided by Andy Bower and Blaire McGlashan from www.object-arts.com The article from BitwiseMag [3] gives an overview. The existing Dolphin 6.2 codebase was brought by Andy Bower now under Git and compiles completely under VisualStudio Community 2013. This is a new version, Dolphin 7, that is modelled off the previous X6.1 Professional Edition (although you can choose to build Dolphin Community Edition from it if you like). Have fun T. [1] http://www.object-arts.com/dolphin7.html [2] http://www.object-arts.com/gettingstarted.html [3] http://www.bitwisemag.com/copy/programming/smalltalk/dolphintutorial.html

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why Pillar
by SaÅ¡a JaniÅ¡ka Dec. 29, 2015

Dec. 29, 2015

Hiya, I see that Pharo project has embraced Pillar system for documentation purposes and my first question was "Why Pillar?" since, iirc, comparison was made with e.g Markdown which is, obviously, not sufficient for eg. authoring books, but there are more capable markups with 'standard' implementations like rst/Sphinx and Asciidoc(tor). Then I thought it must be some deeper reason, iow. something suitable to work more closely with Pharo itself. Now I have two questions: 1) Can someone answer in more detail "Why Pillar?" and 2) For some time I was considering whether to settle on using rst or AsciiDoc for *all* my writings, which means blog posts, my study notes, preparing books, writing articles etc. Since I've settled to use Python-powered static-site-generator (Nikola) along with reStructuredText markup which can call external 'compilers' to process blog posts written in specific markup, I wonder if it would be possible to use Pillar markup with it since it seems there is cli for it? Sincerely, Gour Â -- When your intelligence has passed out of the dense forest of delusion, you shall become indifferent to all that has been heard and all that is to be heard.

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Smallworlds - Interactive Fiction Framework
by ericvm Dec. 29, 2015

Dec. 29, 2015

I don't know if this is the appropriate venue to do that, but I'd like to announce that I finished a stable implementation of a framework for developing Interactive Fiction in Pharo Smalltalk. It is based on an old code written by Bob Jarvis for Dolphin, but it has been changed so much that it is almost something new. This is my first project and I'm still working around Metacello and polishing stuff up. So I appreciate any code contributions, comments or thoughts about it. It is hosted on Smalltalkhub: (http://smalltalkhub.com/#!/~ericvm/Smallworlds) -- View this message in context: http://forum.world.st/Smallworlds-Interactive-Fiction-Framework-tp4868560.h… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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