February 2015 - Pharo-users

SmaCC: First steps
by kilon alios March 3, 2015

March 3, 2015

Ok I have read a few times of the tutorial of Smacc in here http://www.refactoryworkers.com/SmaCC/ASTs.html and I am also following the help tool documentation inside pharo for SmaCC and I have to say I am very confused. Please bare with me because I am extremely noob when it comes to parsing, this is my first effort. Now the way I understand it so far, is that SmaCC uses a syntax similar to regex expressions to define parsers and scanners. Scanners evaluate a string to see that it contains a valid form and parser divide to parts named as "tokens" and help in the creating of ASTs which are basically hierarchy tree containing the syntax elements of a language. Now in order to make SmaCC work I need to use the SmaCC tool that comes with pharo . The smacc tool takes two inputs a scanner and a parser class. Does that mean I need to create that parser and scanner class ? I thought since I define the syntax that those things would be generated by the tool. What I need to define exactly ? Why when I select the PythonScanner2 and PythonParser2 and click then Compile LR it gives a MNU receiver of method is nil ? I am using latest Pharo 4 image. My goal is to parse python types to similar pharo objects. I get those python types as strings and my main focus in lists, dictionaries and tuples . The tricky part is that one can contain the other inside in every imagined way. The way I understand it I will need something called "transformations" to convert those python types to OrderedCollections, Arrays etc and anything would make more sense for a pharo coder. Additionally what is the meaning of the vertibal bar ? --> | eg. | Number Are there any other tutorials that can help a beginner like me to understand these concepts ? I am not looking for someone to give me the solution to the plate, I would love to learn and understand parsing because I am very interested into making Pharo easy to mix with Python code and allow Pharo to use Python libraries without the user having to learn or code Python :) As you may imagine this is a crucial ingredient for my project Ephestos which tries to use Pharo to script Blender by either replacing or cooperating with blender python. So learning a good way to parse pharo code to python code and vice versa is extremely important for me.

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Git (gitfiletree) on Pharo vs Windows
by Jan B. March 3, 2015

March 3, 2015

Hello We are moving our project from smalltalkhub to github. Gitfiletree seems to be working as expected on linux, but there are some of us (well, me) who would like to contribute from Windows, but I am unable to make it working (which is, of course, also "as expected" :) ). What do I have: Windows 7 64bit Pharo 4 (#40496) Pharo VM for win, tried both stable (371 from 2014-09-25) and latest (410 from 2015-02-17) git version 1.9.5.msysgit.0 What did I try: 1) using Git for Windows from http://git-scm.com/downloads 2) cloning our project into ~/Pharo/repo (this created folder structure ~/Pharo/repo/dynacase/repository where all package folders are, along with .git folder in ~Pharo/repo/dynacase 3) downloading clean Pharo 4 platform 4) running from playground (tried both MetaRepoForPharo40 and 30): Gofer new url: 'http://smalltalkhub.com/mc/Pharo/MetaRepoForPharo40/main'; configurationOf: 'GitFileTree'; loadDevelopment. 5) this step I tried only once in few tries: updating all OSProcess and CommandShell packages to latest commits 6) adding repository to Monticello, selected gitfiletree://, selected folder ~/Pharo/repo/dynacase/repository , OK Result was being swamped by exceptions every time. When I did step 5, I got different exceptions and, also, windows command line has opened (but "empty", ie. like if I opened it myself in folder with Pharo.exe and left like that) Only thing that worked for me was adding this local repository as regular filetree (not gitfiletree), commiting there, and than commiting same thing once again with git via command line (or git bash). I would like to ask for help with making it work somehow better. Here are saved images from moments when I confirmed adding gitfiletree repository with those mentioned exceptions and errors: https://www.mediafire.com/folder/879qs8srf5ice/PharoGitConfigs (30 = using MetaRepoForPharo30, 40 = using MetaRepoForPharo40, latest = using MetaRepoForPharo40 + loading latest packages) Thank you Jan BlizniÄenko -- View this message in context: http://forum.world.st/Git-gitfiletree-on-Pharo-vs-Windows-tp4806791.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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Re: [Pharo-users] Zinc SSL Exception: decrypt failed code:5
by Sabine Manaa March 2, 2015

March 2, 2015

Hi Sven, Hi all, I try to send a curl command (which works at command line) from Pharo. I get the error: "SSL Exception: decrypt failed code:5" The working command line command is: curl -v -H 'Accept: application/json' -u 'aUser:aPassword' 'https://user.xxx.net/oauth/token?grant_type=client_credentials' the result is something like: {"access_token":"a31xxxa-2a22-4xx6c-938d-2bd3ae4a0629","token_type":"bearer","expires_in":42095,"scope":"write"} My current Pharo code is: | theZnClient | theZnClient := ZnClient new systemPolicy ; https; host: 'user.xxx.net'; path: 'oauth/token?grant_type=client_credentials'; username: 'aUser' password: 'aPassword'; accept: ZnMimeType applicationJson; get. theZnClient inspect close. 'aPassword' and 'aUser' and xxx.net was replaced by me for security reasons. In Pharo, I get a walkback with the error message 'SSL Exception: decrypt failed [code:-5]' But I see, that the ZdcSecureSocketStream has the correct result ({"access_token":...":"write"}) in its collection attribute at utf-8 string and at latin1-string so, the request is done and the result is available but then it fails here: ZdcSecureSocketStream(Object)>>error: ZdcSecureSocketStream>>sslException:code: ZdcSecureSocketStream>>fillBytes:startingAt:count: in Block: [ ... ZdcSecureSocketStream>>fillBytes:startingAt:count: ZdcSecureSocketStream(ZdcSimpleSocketStream)>>fillReadBufferNoWait ZdcSecureSocketStream(ZdcSimpleSocketStream)>>fillReadBuffer ZdcSecureSocketStream(ZdcOptimizedSocketStream)>>readInto:startingAt:count: ZnUTF8Encoder>>optimizedReadInto:startingAt:count:fromStream: ZnUTF8Encoder>>readInto:startingAt:count:fromStream: Sven, I could send you the 'aPassword' and 'aUser' and the url by private message. It would be fine if you could have a short look at it. Regards Sabine -- View this message in context: http://forum.world.st/Zinc-SSL-Exception-decrypt-failed-code-5-tp4808230p48… Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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SQLite3 - External module not found
by Julien Delplanque March 1, 2015

March 1, 2015

Hello everyone, I have problems to get SQLite3 package working. I tried the solution provided in another thread of the mailing list that was to create a symbolic link from libsqlite3.so to a file located in the pharo3.0/bin directory and named 'libsqlite3.so' as well but I still get the error: External module not found. My OS is Archlinux (Linux version 3.18.6-1-ARCH (builduser@tobias) (gcc version 4.9.2 20141224 (prerelease) (GCC) ) #1 SMP PREEMPT Sat Feb 7 08:44:05 CET 2015) and I'm using pharo3. The code that fail: c := SQLiteConnection fileNamed: ':memory:'. c open. Maybe I'm missing something with the libsqlite3.so file? Thanks in advance, Julien

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[ANN] Language Detection API Client
by HernÃ¡n Morales Durand March 1, 2015

March 1, 2015

Hello, Language Detection API is a service to query the language of a given input text. You will need to register an API key in the web site http://detectlanguage.com to use the service. This client enables to use the service from Pharo Smalltalk. The output is an object containing the language code, a confidence score and a 'is reliable' boolean value. Installation and usage details in the following post: http://80738163270632.blogspot.com.ar/2015/02/languagedetection-api-client-… Cheers, HernÃ¡n

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smalltalk workshops (building a webserver) after code-in
by Martin BÃ¤hr Feb. 28, 2015

Feb. 28, 2015

hi, Google Code-In is over (i'll probably write more about that later) and there are a few students who have started their path to smalltalk. because there was interest among the students to continue learning, we have started a series of workshops to learn the elements of building a webserver. i have created a screencast for the first topic: FileSystem you can read more about the workshop and find the screencast here: http://societyserver.org/mbaehr/training/Using-the-FileSystem-class-in-Phar… being new to smalltalk myself, there are probably some mistakes, and things that could be done better, however i believe the screencast is usable for learning. i recorded this mostly without interruption except for a few times where i was lost and had to stop and look up what i was going to do. i am open to feedback and criticism of any kind, from pointing out redundant ()s or ways to improve the code to tips for debugging and testing. the next workshop will be saturday the greetings, martin. -- eKita - the online platform for your entire academic life -- chief engineer eKita.co pike programmer pike.lysator.liu.se caudium.net societyserver.org secretary beijinglug.org mentor fossasia.org foresight developer foresightlinux.org realss.com unix sysadmin Martin BÃ¤hr working in china http://societyserver.org/mbaehr/

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Zn using String>>#substrings:
by Sven Van Caekenberghe Feb. 28, 2015

Feb. 28, 2015

Hi, Zinc HTTP Components' latest stable version 2.6.2 which was integrated in Pharo 4.0 is using String>>#substrings: instead of String>>#subStrings: For Pharo 4 this is of course OK. String>>#substrings: was also added to Pharo 3.0. For Pharo 2.0 Zinc will load a 'forward compatibility' package to add the missing method. If you are working in/with an older/existing Pharo 3.0 things will not be solved automatically. Either add the method yourself, or load 'Zinc-pharo2-forward-compatibility' manually. It might even be possible to update the image, but I haven't tried that. HTH, Sven

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Postdoc position at INRIA Chile
by Alexandre Bergel Feb. 28, 2015

Feb. 28, 2015

Dear All, I have just received a announcement for a position at INRIA Chile. Here is an extract from the call. It is written in Spanish, however it is also open to non-spanish speaker. "Inria Chile fue creado en Chile en 2012 por Inria (www.inria.fr) y en colaboracioÌn con 9 universidades chilenas. Cuenta con el apoyo de CORFO, que seleccionoÌ el proyecto de Inria Chile en el marco del concurso AtraccioÌn de Centros de Excelencia Internacional para la Competitividad dedicado a desarrollar y reforzar las capacidades I+D del paiÌs. Inria Chile desarrolla sus actividades I+D a traveÌs de una plataforma de desarrollo de acciones aplicadas, que busca proponer soluciones a desafiÌos econoÌmicos y sociales para Chile, tal como energiÌa, en particular energiÌas renovables, recursos naturales y âciudades inteligentesâ. TambieÌn se estaÌ trabajando en temas aplicados como desarrollo sustentable, gestioÌn de cataÌstrofes naturales o el desarrollo de tecnologiÌas avanzadas para la astronomiÌa. Buscamos a un postdoc interesado en trabajar part-time en estrecho viÌnculo con un equipo de desarrollo que lleva a cabo una de estas acciones. Las competencias requeridas son particularmente en las aÌreas de: aprendizaje, datos masivos, redes de sensores, visualizacioÌn interactiva. Esta lista no es exhaustiva.â If you have a PhD and are interested, please contact me! Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Re: [Pharo-users] Seaside jQuery - Sorting a list with drag and drop and sending it back via Ajax causes OrderedCollection to turn into an Array?
by Stephan Eggermont Feb. 27, 2015

Feb. 27, 2015

To see a working example of this, take a look at StoryBoard Download the 30 image from https://ci.inria.fr/pharo-contribution/job/StoryBoard/ Start it, open the seaside control panel and start a ZnZincServerAdaptor on port 8080. Open a web browser on http://localhost:8080/story, register yourself, add a project and start adding stories. They can be dragged and dropped. The actual code is in the rendering methods of SBProjectStoryColumn Stephan

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slow pharo launcher
by Peter UhnÃ¡k Feb. 27, 2015

Feb. 27, 2015

For anyone that may be experiencing this... Yesterday when I got above around 20 images PharoLauncher suddenly started to load slowly (over 5s instead of 1-2s) and even when I deleted some it stayed slow, however downloading fresh Pharo 3 image and installing PharoLauncher it works nicely again even with many images... maybe some leak somewhere? Peter

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