- Pharo-users - lists.pharo.org

Add gitfiletree:// Error
by Trussardi Dario Romano Nov. 29, 2016

Nov. 29, 2016

Ciao, after load the GitFileTree on Pharo 5.0 ( I use the desktop Pharo image ) when in Monticello Browser i add a new repository based on gitfiletree:// after select a directory (on the local disk ) the system answer: PrimitiveFailed: primitive #loadSymbol:module: in ExternalAddress class failed The relative variable are: loadSymbol: 'environ' module: libc.dylib The stack is: ExternalAddress class>>loadSymbol:module: ExternalAddress class>>loadSymbol:from: UnixEnvironment>>environ UnixEnvironment>>environAt: [ associationString := self environAt: index. associationString ifNil: [ ^ self ]. self keysAndValuesDo: aBlock withAssociationString: associationString. index := index + 1 ] in UnixEnvironment>>keysAndValuesDo: in Block: [ associationString := self environAt: index.... BlockClosure>>repeat UnixEnvironment>>keysAndValuesDo: UnixEnvironment(OSEnvironment)>>asDictionary OSSUnixSubprocess>>defaultEnvVariablesDictionary OSSUnixSubprocess>>addAllEnvVariablesFromParentWithoutOverride OSSUnixSubprocess>>buildPrimitiveEnvArgument OSSUnixSubprocess>>internalRun [ self internalRun ] in OSSUnixSubprocess>>run in Block: [ self internalRun ] BlockClosure>>ensure: OSSUnixSubprocess>>run OSSUnixSubprocess>>runAndWaitPollingEvery:retrievingStreams:onExitDo: MCFileTreeGitRepository class>>runOSSubprocessGitCommand:in: [ :bar | bar label: self gitCommand , ' ' , anArrayOfStrings first. Smalltalk platform isWin32 ifTrue: [ ^ self runProcessWrapperGitCommand: anArrayOfStrings in: aDirectory ] ifFalse: [ ((Smalltalk at: #OSSUnixSubprocess ifAbsent: [ ]) ifNil: [ false ] ifNotNil: [ :g | g isClass ]) ifTrue: [ ^ self runOSSubprocessGitCommand: anArrayOfStrings in: aDirectory ] ifFalse: [ ^ self runOSProcessGitCommand: anArrayOfStrings in: aDirectory ] ] ] in MCFileTreeGitRepository class>>runGitCommand:in: in Block: [ :bar | ... [ :bar | aBlock value: bar ] in MorphicUIManager>>informUserDuring: in Block: [ :bar | aBlock value: bar ] BlockClosure>>cull: [ ^ block cull: self ] in [ self prepareForRunning. CurrentJob value: self during: [ ^ block cull: self ] ] in Job>>run in Block: [ ^ block cull: self ] [ p psValueAt: index put: anObject. aBlock value ] in CurrentJob(DynamicVariable)>>value:during: in Block: [ p psValueAt: index put: anObject.... BlockClosure>>ensure: CurrentJob(DynamicVariable)>>value:during: CurrentJob class(DynamicVariable class)>>value:during: [ self prepareForRunning. CurrentJob value: self during: [ ^ block cull: self ] ] in Job>>run in Block: [ self prepareForRunning.... BlockClosure>>ensure: Job>>run MorphicUIManager(UIManager)>>displayProgress:from:to:during: MorphicUIManager>>informUserDuring Considerations ? Thanks, Dario

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Flashing short duration images in a window
by William L. Cleveland Nov. 29, 2016

Nov. 29, 2016

I want to write code to flash a color image of a person in a window for a short period of time. The duration of the flash is important, not the frequency of the flashes, which will be low and probably controlled by pressing a key. Ideally, the duration should be an integral number of frames, starting from 1 and increasing to a much larger number. With a 60 Hz monitor, one frame would be 0.0167 seconds. The images would be low to moderate resolution, e.g. 70K to 1 Mb Can this be done entirely in Pharo or would it be necessary to use the Unified FFI with operating system commands? If it can be done in Pharo, what are the classes needed to display an image filed in from the hard drive? I am using a 27 inch iMAC (10.11.6) with 4GHz, 8 GB ram, and AMD Radeon R9 M395X 4096 MB video card. Pharos is new to me but I wrote Smalltalk code with VisualWorks a few years back. Thanks very much. Lou Cleveland

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Any Pharo 5 in the industrial setup?
by Yuriy Tymchuk Nov. 29, 2016

Nov. 29, 2016

Dear all, my name is Yuriy Tymchuk, I am a researcher from Bern University and the author of QualityAssistant and other quality-related tweaks and experiments in Pharo. I am interested to know is anybody uses Pharo 5 in industry as I've spent plenty of time to develop QualityAssistant and I am interested to know if it is useful in the industrial setup. So if you know any project please let me know. If you are an industrial developer working on Pharo 5 Iâm interested in a short chat. If you donât have a time for chat maybe you can spend a couple of minutes on a small questioner because I really want to make QA useful for developers. Cheers. Yuriy

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ZnClient GET, but just the content of the <head> tag?
by PAUL DEBRUICKER Nov. 29, 2016

Nov. 29, 2016

This is a micro optimization if there ever was one but I wondered if it was possible to stop downloading and get the entity once the </head> tag has been received. Right now I download the whole page, parse it with Soup, then extract the tags I want from the head. Which works fine. e.g. head:=((Soup fromString: (ZnEasy get: 'http://pharo.org') entity) findChildTag: 'html') findChildTag: 'head'.

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Execute a script from command line save image and exit
by Dimitris Chloupis Nov. 28, 2016

Nov. 28, 2016

How to execute a script from command line , then save the image and exit ? I use the st command but it offers either --save which saves but keeps image opened or --exit the exits the image without saving ./pharo Ephestos.image st --save test.st

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Dictionaries and STON
by Cyril Ferlicot D. Nov. 28, 2016

Nov. 28, 2016

Hi! I need to store some datas and in my model I have a dictionary with objects as keys. When I try to serialize and materialize it with STON I get an error. Apparently STON manage dictionaries with literals as key only. Is there a workaround to this? -- Cyril Ferlicot http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

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Where is the documentation of the base class libraries?
by Derry Bryson Nov. 28, 2016

Nov. 28, 2016

Where can I find documentation of the base class libraries for Pharo Smalltalk? Or is there some other way I should learn about the system? Thanks, Derry

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[SmaCC] Partial Installation
by Dimitris Chloupis Nov. 27, 2016

Nov. 27, 2016

Hey there , I would like to install from SmaCC only Python and C++ parsers , any idea how to add that to my baseline as a dependency ? --- ÎÏÏÏ ÏÎ¿ e-mail ÎµÎ»ÎÎ³ÏÎ¸Î·ÎºÎµ Î³Î¹Î± Î¹Î¿ÏÏ Î±ÏÏ ÏÎ¿ ÏÏÏÎ³ÏÎ±Î¼Î¼Î± Avast antivirus. https://www.avast.com/antivirus

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[ANN] CPPBridge: One Ring to rule them ALL
by Dimitris Chloupis Nov. 25, 2016

Nov. 25, 2016

*https://youtu.be/pI4PR3XaX6Q <https://youtu.be/pI4PR3XaX6Q>* *What is it ?* CPPBridge is a library that allows Pharo to share memory with any C/C++ application. Opening the door not only to IPC and data sharing but also even complete control of C++ code from Pharo and vice versa. *How to install ?* In a few hours it should be available from Package Browser, if not you can always fetch it with Metacello from here because it comes with a Baseline https://github.com/kilon/CPPBridge *Why bother making such a library ? * In my saga to find a way to use Pharo as a scripting language for Unreal Game Engine, I had two options a) Build Unreal as a Library and use Pharo UFFI to launch and control it b) Embed Pharo inside the Unreal Executable (this is what every other scripting language uses for controlling Unreal) Option (a) was a no go, because Unreal is huge , complex and uses its own custom made build tools, making a DLL for Pharo or an army of DLLs out of the question Option (b) Embeding Pharo inside an executable is impossible and implementing it also insanely complex Naturally my mind went first into sockets which is what I use to make Pharo able to use Python libraries. However sockets have proven too slow for the insanely fast loops of Unreal. *What are the advantages ?* 1) *No need to move data around.* Sharing memory means you don't have to move data around, you can use directly the shared memory 2)* Extend the Pharo image beyond Pharo.* Shared memory is mapped into a file means that you can do with C++ what you can do with Pharo image, save the live state directly to a binary file. That means we no longer need to worry about sessions and reinitializing C/C++ data since memory mapped file acts as an extension of the Pharo image. 3) *Blazing fast. *Memory mapping is a function that comes directly from the OS kernel and as such it has to be extremely fast. Memory mapping is also what is used for dynamically linked shared libraries an extremely important feature for any application including Pharo that heavily depends on (see Cairo for Athens). So its a very mature , well tested method. 4) *No extra libraries needed* to be installed, CPPBridge uses OS libraries to work out of the box 5) *Low level handling of memory.* Direct access to memory you can even manipulate the memory byte by byte 6)* Memory efficient.* Memory mapping excels at large data, the bigger the better. Can take full advantage of your entire free memory and not waste a byte. That means also that can be used to optimise Pharo memory, since you could compress your Pharo objects to bytes and mapped file will store the live state. 7) *Tons of Languages. *Because memory mapping is a core functionality for every OS out there, pretty much every programming language supports it. CPPBridge currently supports only C/C++ but all languages can be supported giving access to Pharo to any library for any programming language. Sky is the limit 8) *Self Documented. *CPPBridge is small, simple and with large class comment and comments for every method. YouTube video tutorial also available and linked on top. 9) *Works both ways*, C/C++ and Pharo can access and modify the shared memory. Making it possible for C/C++ to use Pharo libraries and Pharo to use C/C++ libraries. 10) Experiments have proven that it improves sex life... if it does not please file a bug report ;) *What are the disadvantages ?* 1) *Candy Crash Saga*. Dare do something incorrectly and Pharo will crash. CPPBridge can easily point to wrong address if you are not aware of what you doing. 2) *C++/C* . If you think you can avoid learning C/C++ and that this is a magic solution , think again. The C/C++ application must be modified to include shared memory mapping for CPPBridge to work . 3) *Local only*. Unlike sockets, Shared Memory works only on the same machine so no remote execution and manipulation of code like in my socket bridge to Python 4) *UFFI still No1 option*. No replacement for UFFI it actually depends on it to work , so if you can turn your C/C++ code into a DLL that should be your first option. *Roadmap * Currently CPPBridge works only on MacOS , most likely on Linux too (because it uses the Unix architecture) but I will have to test it. Windows is coming next ASAP, since its my No1 platform for creating commercial games. Maybe establish a small protocol of communication via the Shared Memory , JSON looks like a good universal format *Thanks* Big thanks to Eliot for inspiring me and Esteban for helping me figure out things.

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Re: [Pharo-users] [ANN] Animation package
by Thibault Raffaillac Nov. 24, 2016

Nov. 24, 2016

Great! Tell me when you have any feedback (good or bad indeed). Thibault > Hello, > > Cool, I'll give a try to add animations to my windows switcher (Mirage [1]). > > Julien > > Links: > [1]: https://github.com/juliendelplanque/Mirage

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