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

Cog VM on Raspberry Pi ?
by Sven Van Caekenberghe Oct. 19, 2016

Oct. 19, 2016

Hi, Does a (faster) Cog VM for the Raspberry Pi actually exist ? I tried comparing the latest OpenSmalltalk VM with some older ones, only to find that they are all equally fast (slow actually): pi@raspberrypi ~/Pharo $ ./pharo -nodisplay Pharo.image printVersion [version] 5.0 #50581 "http://files.pharo.org/vm/pharoS/raspbian/latest.zip" pi@raspberrypi ~/Pharo $ ./pharo -nodisplay Pharo.image eval '1 tinyBenchmarks' '167429692 bytecodes/sec; 11160247 sends/sec' "http://www.mirandabanda.org/files/Cog/VM/VM.r3427/cogspurlinuxhtARM-15.33.3…" pi@raspberrypi ~/Pharo $ ./products/phcogspurlinuxhtRPi/pharo -nodisplay Pharo.image eval '1 tinyBenchmarks' '166992824 bytecodes/sec; 11337746 sends/sec' "https://bintray.com/opensmalltalk/vm/download_file?file_path=cog_linux32ARM…" pi@raspberrypi ~/Pharo $ ./products/phcogspurlinuxhtRPi/pharo -nodisplay Pharo.image eval '1 tinyBenchmarks' '166992824 bytecodes/sec; 11337746 sends/sec' That is no significant difference on a RPi 3, at all. Is this normal ? Am I missing something ? Thx, Sven PS: Just for reference, my Mac Book Pro is 10 times faster 1 tinyBenchmarks "'1323852617 bytecodes/sec; 174185794 sends/sec'"

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Refactoring changed method
by Vitor Medina Cruz Oct. 19, 2016

Oct. 19, 2016

Hello, While I was editing a method, if I do a rename temporary refactoring the system rollbacks every change I did to the method in order to apply the refactoring. Is that the correct behavior? Shouldn't It at least asks me if I want to save my changes before I apply the refactoring? It was really confusing the first time it happened and it took some time before I could understand what happened. Regards, Vitor

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Pharo Monthly Newsletter: How to subscribe
by Marcus Denker Oct. 19, 2016

Oct. 19, 2016

Hi, We are sending out a monthly (with a summer breakâ¦) newsletter. Of course if you read all the mails here, there is nothing new, but it is fun to get a mail every month with pointers to projects and news that one might have missed. Subscribe here: http://eepurl.com/byhgL9 Marcus

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Nao robot with Pharo and LRP
by Miguel Campusano Oct. 18, 2016

Oct. 18, 2016

Hello, I've been working on an API for the Nao Robot [1] in Pharo. You can find an early demo of how it works in Pharo: https://www.youtube.com/watch?v=z8jopUfLWtQ Moreover, I built a communication bridge between the Nao and LRP [2]. LRP is a live programming language for robotic behaviors. You can see a working demo of the nao moving via LRP here: https://www.youtube.com/watch?v=q1jGDtaW41U I want to emphasize how easy and fun can be to program a robot with a live environment. Looking at the robot and see how immediately changes its behavior whenever you send a command, that is cool! You can find the API here (I have to write the documentation on how to use it): http://www.smalltalkhub.com/#!/~mcamp/NaoSocket This is a work in progress. The Nao has several features that I'm planning to incorporate in the API when they are needed. To make this work I use TCP sockets to communicate with the robot. For the Nao, there is a documentation on how the robot communicates via binary packages, but the documentation lacks a lot of information that I managed to figure it out by reading the binary information (thanks gtInspector for that) and understanding how the robot works. [1] https://www.ald.softbankrobotics.com/en/cool-robots/nao [2] pleiad.cl/lrp

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Re: [Pharo-users] [Seaside] Seaside can not be used with Pharo 60261
by Cyril Ferlicot D. Oct. 18, 2016

Oct. 18, 2016

Le 18/10/2016 Ã 15:41, Cyril Ferlicot D. a Ã©crit : > Hi! > > I could load Seaside but when I start the adaptor and go to > localhost:8080 I get an error[1] `receiver of #from:to: is nil`. > There is some error on Jenkin's logs that where not here before[2]. > > > [1] http://puu.sh/rN9fV/780adbcfe0.png > [2] http://puu.sh/rN9rb/dd9de6776a.png > I think that this mcz should correct the problem but I don't have the rights on Seaside repo. Can someone add me to the Seaside Team or copy the mcz? I just added a 'pharo6.x' in the configuration where there is a 'pharo5.x' so it should be a safe change. -- Cyril Ferlicot http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

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looking for a tutorial on sounds in Pharo
by Grigory Hatsevich Oct. 18, 2016

Oct. 18, 2016

Hi! I'm looking for a tutorial about sound generation in Pharo. I've found "PharoSoundTutorial" (https://github.com/xmessner/PharoSoundTutorial) but it is in French. Is there an English version of this tutorial or some other English text about sounds in Pharo?

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Re: [Pharo-users] Spec: scaling imageModels
by stepharo Oct. 18, 2016

Oct. 18, 2016

Hi matteo Spec does not expose the complete API. Now if you need you can propose some extensions. Stef

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[JOB][Research] Postdoc "'Higher level IDEs for BlockChain Technologies"
by Marcus Denker Oct. 17, 2016

Oct. 17, 2016

We are looking to fill a Postdoc position. The candidate should : - hold a PhD degree in Computer Science - be fluent in English (French is an advantage but not required) - have good programming skills Experience with DSLs, IDEs, Models, compilers, code analysis... is a plus. Topic: Higher level IDEs for BlockChain Technologies ==================================================== With Ethereum, BlockChain technology moves from being an implementation technology for virtual currency to being the basis for developing new kinds of software with smart contracts. The goal of this project is to analyse and improve high-level development and analysis tools for this new kind of software. Users like banks and insurance companies need tools that model their processes and level of confidentiality of the information shared though blockchain technology, especially on public blockchains. For this, users need a solution that provides a higher level way to model systems than solidity code or even low-level byte-code. In addition, blockchain based solutions often use multiple programming languages. Especially the later poses a risk for later software maintenance. The goal of this Postdoc is to work on high level IDE / modelling tools for blockchain technology like Ethereum. The plan is to - Analyse the current state of tools and languages in the context of blockchain technologies. - Analyse the current state: modelling tools and processes with a focus in decision processes both in communities and commercial use. - Explore how to improve the state of the art, with a focus on how tools can support users of blockchain solutions. - Realize prototypes for IDEs/modelling tools for Ethereum, possibly using Pharo. Directions to explore will be both related to generating and analysing solidity code as well as complete solutions for users in an industrial setting. - Results will be submitted to be publish in international conferences and journals. The work is a collaboration between Inria Lille (RMOD) and Utocat SAS. Duration : 2 years Salary: 31 644â¬ brut Employer: Inria More information: contact marcus.denker(a)inria.fr Utocat: ====== Utocat was created in October 2014 by ClÃ©ment Francomme to help merchants accepting bitcoin payments and converting it directly in euros. In 2015, Utocat joined the EuraTechnologies acceleration program and pivoted to propose Blockchainiz : the dedicated access platform for Banks and Insurance companies. Laurent Koszyczek and Alexis MÃ©vellec partnered with ClÃ©ment Francomme to improve the technical and commercial aspects. As a Platform As A Service (PAAS), Blockchainiz accompanies projects up to the production stage. Blockchainiz connects the functional processes to the blockchain. Data is not replicated on different IT systems anymore. Blockchain is used as a common repository for every part of the process. Hence, it enables to limit the typing errors, to optimize the costs and delays while the customer experience is improved. More information at: https://www.blockchainiz.io Inria Lille =========== Inria is a research institute dedicated to promoting âscientific excellence in the service of technology transfer and society as a wholeâ. Inria employs a staff of 2700, drawn from the worldâs most prestigious universities, to address the latest challenges in computer science and mathematics. The Institute operates eight Research Centres throughout France. The Inria Lille - Nord Europe Research Centre was founded in 2008 and employs a staff of 360, including 300 scientists working in sixteen research teams. Recognised for its outstanding contribution the socio-economic development of the Nord - Pas-de-Calais Region, the Inria Lille - Nord Europe Research Centre undertakes research in the field of computer science in collaboration with a range of academic, institutional and industrial partners. The strategy of the Centre is to develop an internationally renowned centre of excellence with a significant impact on the City of Lille and its surrounding area. It works to achieve this by pursuing a range of ambitious research projects in such fields of computer science as the intelligence of data and adaptive software systems. Building on the synergies between research and industry, Inria is a major contributor to skills and technology transfer in the field of computer science. https://www.inria.fr/centre/lille RMOD ==== The goal of RMoD is to support remodularization and development of modular object-oriented applications. We tackle this objective from two complementary perspectives: reengineering, and constructs for dynamic languages. In the context of languages, we revisit language concepts such as modules and composition; we are also working on a new generation of reflective systems. We experiment with these programming constructs using Pharo, an open source, reflective, object-oriented language. http://rmod.inria.fr

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<Programming> 2017: Call for papers
by Tim Molderez Oct. 17, 2016

Oct. 17, 2016

<Programming> 2017 : The Art, Science, and Engineering of Programming April 3-6, 2017, Brussels, Belgium http://2017.programming-conference.org We started a new conference and journal focused on everything to do with programming, including the experience of programming. We call the conference <Programming> for short. Paper submissions and publications are handled by the journal. Accepted papers must be presented at the conference. ******************************************************** CALL FOR PAPERS ******************************************************** <Programming> 2017 accept scholarly papers including essays that advance the knowledge of programming. Almost anything about programming is in scope, but in each case there should be a clear relevance to the act and experience of programming. PAPER SUBMISSIONS: December 1, 2016 We accept submissions covering several areas of expertise. These areas include, but are not limited to: â¢ General-purpose programming â¢ Distributed systems programming â¢ Parallel and multi-core programming â¢ Graphics and GPU programming â¢ Security programming â¢ User interface programming â¢ Database programming â¢ Visual and live programming â¢ Data mining and machine learning programming â¢ Interpreters, virtual machines and compilers â¢ Modularity and separation of concerns â¢ Model-based development â¢ Metaprogramming and reflection â¢ Testing and debugging â¢ Program verification â¢ Programming education â¢ Programming environments â¢ Social coding ******************************************************** CALL FOR WORKSHOP PROPOSALS ******************************************************** To build a community and to foster an environment where participants can exchange ideas and experiences related to practical software development, â¹Programmingâº will host a number of workshops, during the days before the main conference. The workshops will provide a collaborative forum to exchange recent and/or preliminary results, to conduct intensive discussions on a particular topic, or to coordinate efforts between representatives of a technical community. They are intended as a forum for lively discussion of innovative ideas, recent progress, or practical experience on programming and applied software development in general for specific aspects, specific problems, or domain-specific needs. We also encourage practical, hands-on workshops in which participants actually experience one or several aspects of practical software development. WORKSHOP PROPOSAL SUBMISSIONS: November 15, 2016 The duration of workshops is in general one day, but we encourage the submission of half-day workshop proposals on focused topics as well. In exceptional situations, e.g., for workshops that involve actual practice of programming-related activities, workshop organizers can request a 2 day workshop slot. If desired, the workshop proceedings can be published in the ACM Digital Library. ******************************************************** IMPORTANT DATES ******************************************************** Research paper submissions: December 1, 2016 Research paper first notifications: February 1, 2017 Research paper final notifications: March 7, 2017 Workshop proposals: November 15, 2016 PX 2017 workshop submissions: January 15, 2017 Poster abstract submissions: January 16, 2017 ******************************************************** ORGANIZATION ******************************************************** General Chair: Theo D'Hondt, Vrije Universiteit Brussel Local Organizing Chair: Wolfgang De Meuter, Vrije Universiteit Brussel Program Chair: Crista V. Lopes, University of California, Irvine Organizing Committee: JÃ¶rg Kienzle (workshops), McGill University Hidehiko Masuhara (demos), Tokyo Institute of Technology Ralf LÃ¤mmel (contest), University of Koblenz-Landau Jennifer Sartor (posters), Vrije Universiteit Brussel Tobias Pape (web technology), HPI - University of Potsdam Tim Molderez (publicity), Vrije Universiteit Brussel Program Committee: Andrew Black, Portland State University Shigeru Chiba, University of Tokyo Yvonne Coady, University of Victoria Robby Findler, Northwestern University Lidia Fuentes, Universidad de MÃ¡laga Richard Gabriel, IBM Research Elisa Gonzalez Boix, Vrije Universiteit Brussel Jeff Gray, University of Alabama Robert Hirschfeld, HPI - University of Potsdam Roberto Ierusalimschy, PontifÃcia Universidade CatÃ³lica do Rio de Janeiro JÃ¶rg Kienzle, McGill University Hidehiko Masuhara, Tokyo Institute of Technology Sasa Misailovic, University of Illinois at Urbana-Champaign Guido Salvaneschi, Technische UniversitÃ¤t Darmstadt Mario SÃ¼dholt, Ecole des mines de Nantes Jurgen Vinju, Centrum Wiskunde & Informatica Tijs van der Storm, Centrum Wiskunde & Informatica ******************************************************** <Programming> 2017 is kindly supported by: ACM in-cooperation ACM SIGPLAN in-cooperation ACM SIGSOFT in-cooperation AOSA Vrije Universiteit Brussel ******************************************************** For more information, visit http://2017.programming-conference.org

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How do Smalltalk disambiguate messages?
by CodeDmitry Oct. 16, 2016

Oct. 16, 2016

I am trying to do a JavaScript experiment to make Objects behave like Smalltalk objects. example: "reminder: Smalltalk arrays start at 1." |arr| a := Array new: 1. a at: 1 put: 'Hello, World'. Here, the Smalltalk array has a message "at: index put: value" which is defined many layers of prototype chaining down, at Object in category accessing. However there are many messages on the way traversing the prototype chain that start with "at:", such as(SequenceableCollection) "at: x ifAbsent: y", "at: x incrementBy: y". How does Smalltalk tell which message is which? Does it merge the messages into a single message such as "at: x put: y" to "atPut(x, y)" at some point? Without knowing this, I have to traverse the whole call chain and check whether each argument is called in a specific way, which is incredibly expensive. If there was a single name such as "atPut" I can easily just do a dictionary lookup for this name and get it at O(1). Does Smalltalk actually store each message? -- View this message in context: http://forum.world.st/How-do-Smalltalk-disambiguate-messages-tp4918946.html Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.

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