November 2015 - Pharo-users

Basic versioning of GitHub repositories from within Pharo
by Skip Lentz Nov. 30, 2015

Nov. 30, 2015

Hi everyone, As part of my internship I am creating bindings to the GitHub API in Pharo. As a prototype and demo, I have created a small tool last week to do some basic versioning, namely checking out a version, committing a version and showing a log of commits along with a branch tree. Hereâs a screenshot: http://i.imgur.com/iMfWOvp.png <http://i.imgur.com/iMfWOvp.png> The repository of the bindings and the tool is here: http://smalltalkhub.com/#!/~Balletie/GitHub To load the tool into your image, execute: (ConfigurationOfGitHub project version: #development) load: #tool Keep in mind that this is tied to GitHub, since internally it uses the API. A nice side effect of this is that everything can be done in-memory. That is, thereâs no local copy on the filesystem. One does not even need git installed. That being said, feel free to take off with my prototype and make it work with e.g. the LibGit bindings in Pharo. Known bug: - When selecting a different repository from the dropdown while a version is also selected in the log, one gets a DNU. To work around this for the time being, just deselect the version before you switch repositories. Let me know what you think and feel free to ask some questions. Skip

14 34

Sharing data between images
by Dimitris Chloupis Nov. 30, 2015

Nov. 30, 2015

Just wondering what my options are about sharing data between images, should I use Ston ? A database ? something else ? I would prefer options that have as few dependencies as possible and something that does not require from my users to install external stuff. For now Ston looks like a good option but I am very new to all this so I would welcome any advice from the pharo experts.

5 8

How fuel deals with circular reference ?
by Dimitris Chloupis Nov. 30, 2015

Nov. 30, 2015

I have a class A that has an instance variable the references an instance of Class B , but also Class B has an instance variable the references an instance of Class A. Basically its a GUI that references its model and the same model referencing the same instance of GUI. How Fuel deals with such scenario because I saw that it created an output of 1.5 mbs for several instances of my model class ? Is there any danger of having such circular references or it does not matter because afterall they are just pointers ?

4 8

When exactly an object gets deleted from the system ?
by Dimitris Chloupis Nov. 30, 2015

Nov. 30, 2015

I am wondering when an instance of a class is garbage collected and deleted from the system. is there a way to manually deleted it ?

4 5

Re: [Pharo-users] PharoJS Status
by Andy Burnett Nov. 30, 2015

Nov. 30, 2015

>>> Craig said Hi All, I'd like to start messing around with PharoJS. Can anybody tell what the status is? (Stable, broken, etc.) And, which Pharo version should I use for this? <<< I have just started playing with it. I have had some difficulty getting a running image. Following the instructions - should - work, but I found that I needed to install the NewExternalWebBrowser package separately before it would run. Cheers Andy

2 1

[PhD] Opening for an Internship/PhD on Refactoring
by Thierry Goubier Nov. 30, 2015

Nov. 30, 2015

Hi all, I have an opening on a PhD subject on refactoring for embedded software (start 10/2016), with a 6 month internship before, at CEA List. The PhD title is : 'Reuse of embedded sofware code artefacts by Refactoring' and concern itself with the evolution of embedded software when targetting new parallel embedded platforms or evaluation platforms, and how this can be expressed and supported by domain-specific Refactorings. The internship is about a practical study of the changes undertaken by embedded software code when it is evaluated and re-architectured/optimised in industrial projects undertaken by the laboratory. Both take place at CEA List, LCE lab, in Saclay (SW of Paris), in a laboratory known for its research in simulation of Systems on Chip (SoC), SoC design, compilation for manycores, and neural networks architectures. CEA is a fair employer for internships and PhD students, with a higher than average salary and significant benefits. Interested candidates should contact me. Regards, Thierry Goubier, Research Engineer, CEA List, LCE

2 1

[Pharo5] Semantic Warnings as icons in the editor
by Marcus Denker Nov. 29, 2015

Nov. 29, 2015

Hi, One result of Fridayâs Pharo Sprint in Chile: Use the nice icons of the new text editor to display some of the semantic errors nicely (instead of breaking flow with a intrusive dialog): This was done by Johan based on the prototype Miguel did in September: 1) unused temps: (the âdrag the crosshairâr is an artefact of the snapshot tool) 2) temps used that are not initialised: In a next step, we need to integrate that with the QA toolâ¦ no need to have this reported twice. What is nice is that this simplified the Compiler: instead of having an Exception and raising it, we now just annotate the AST: unusedVariable: variableNode variableNode propertyAt: #semanticWarning put: 'unused variableâ (this is very simple for now, with a node just being able to have one kind of semanticWarning). SemanticWarningIconStyler is what adds the icon. It has 4 methods with one line each. Marcus

3 2

Python's argparse like CommandlineHandler?
by Julien Delplanque Nov. 27, 2015

Nov. 27, 2015

Hello, Is there a way to specify: - The "type" of command line arguments. - The default value if none is given. - That an argument is obligatory or optional? A bit like argparse does in Python, if you know it. Julien

1 0

catching exceptions
by abdelghani ALIDRA Nov. 26, 2015

Nov. 26, 2015

Hi everyBody, I know there is some kind ofÂ exceptions handling mechanismÂ Â in Pharo but I cantÂ exactlyÂ Â remember where to find it.Actually, I would like to execute specific code if atRandomis called on an empty Array or Collection.I probably can still override errorEmptyCollection but maybe there is another (less radical) way.And by the way, Would it be quicker to use exception handling then just testing the Collection before calling atRandom. Thanks AbdelghaniÂ

2 2

How to play audio files with Pharo ?
by Dimitris Chloupis Nov. 25, 2015

Nov. 25, 2015

I want a cross platform solution for playing audio files for my project ChronosManager. By cross platform I mean MacOS, Ubuntu and Windoom. I assume that playback of MP3 is out of the question ? Any ideas /suggestions ?

7 11