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

SPLASH'16: 1st Call for Contributions to Collocated Events
by Tijs van der Storm May 18, 2016

May 18, 2016

################################################# ACM Conference on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH'16) ################################################# Amsterdam, The Netherlands Sun 30th October - Fri 4th November , 2016 http://2016.splashcon.org https://twitter.com/splashcon https://www.facebook.com/SPLASHCon/ Sponsored by ACM SIGPLAN Combined Call for Contributions to SPLASH tracks, collocated conferences, symposia and workshops: - SPLASH-I, Doctoral Symposium, Student Research Competition, Programming Languages Mentoring Workshop, Posters - Dynamic Languages Symposium (DLS) - Generative Programming: Concepts & Experiences (GPCE) - Software Language Engineering (SLE) - Scala Symposium - Workshops: AGERE, DSLDI, DSM, FOSD, ITSLE, LWC@SLE, META, MOBILE!, NOOL, PLATEAU, Parsing@SLE, REBLS, RUMPLE, SA-MDE, SEPS, VMIL, WODA The ACM SIGPLAN conference on Systems, Programming, Languages and Applications: Software for Humanity (SPLASH) embraces all aspects of software construction, to make it the premier conference at the intersection of programming, languages, systems, and software engineering. SPLASH'16 hosts a record number collocated tracks and events, from associated conferences (GPCE, SLE) and symposia (DLS, Scala), to 16 workshops! Please see below about important dates. We look forward to your submissions! SPLASH'16 Additional Tracks =========================== ## SPLASH-I: Innovation, Interaction, Insight, Industry, Invited SPLASH-I is the track of SPLASH dedicated to great talks on exciting topics! SPLASH-I will run in parallel with all of SPLASH (during the week days), and is open to all attendees. SPLASH-I will host both invited talks and selected talks submitted via this call for proposals. SPLASH-I solicits inspiring talks, tutorials and demonstrations on exciting topics related to programming and programming systems, delivered by excellent speakers from academia or industry. Deadlines: 1st of June, 1st of August (if there are still available slots). Website: http://2016.splashcon.org/track/splash-2016-splash-i ## Doctoral Symposium The SPLASH Doctoral Symposium provides students with useful guidance for completing their dissertation research and beginning their research careers. The Symposium will provide an interactive forum for doctoral students who have progressed far enough in their research to have a structured proposal, but will not be defending their dissertation in the next 12 months. Submission deadline: Thu 30 Jun 2016 Website: http://2016.splashcon.org/track/splash-2016-ds ## Student Research Competition Continuing the successes of previous years, SPLASH is again hosting an ACM SIGPLAN Student Research Competition (ACM SRC). The competition is an internationally-recognized venue that enables undergraduate and graduate students to experience the research world and to share their research results with other students and SPLASH attendees. The competition has separate categories for undergraduate and graduate students and awards prizes to the top three students in each category. The ACM SIGPLAN Student Research Competition shares the Poster sessionâs goal to facilitate interaction with researchers and industry practitioners, providing both sides with the opportunity to learn of ongoing, current research. Additionally, the Student Research Competition gives students experience with both formal presentations and evaluations. Submission deadline: Mon 15 Aug 2016 Website: http://2016.splashcon.org/track/splash-2016-src ## PLMW: Programming Language Mentoring Workshop The purpose of Programming Languages Mentoring Workshop (PLMW) is to give promising students who consider pursuing a graduate degree in this field an overview of what research in this field looks like and how to get into and succeed in graduate school. In other words, a combination whirlwind tour of this research area, networking opportunity, and how-to-succeed guide. The program of PLMW will include talks by prominent researchers of the field of programming languages and software engineering providing an insight in their research. To learn more about PLMW, please see the SIGPLAN PLMW web page (http://www.sigplan.org/Conferences/PLMW/) Application deadline: Sun 14 Aug 2016 Website: http://2016.splashcon.org/track/splash-2016-plmw ## Posters The SPLASH Poster track provides an excellent forum for authors to present their recent or ongoing projects in an interactive setting, and receive feedback from the community. We invite submissions covering any aspect of programming, systems, languages and applications. The goal of the poster session is to encourage and facilitate small groups of individuals interested in a technical area to gather and interact. It is held early in the conference, to promote continued discussion among interested parties. Submission deadline: Fri 8 Jul 2016 Website: http://2016.splashcon.org/track/splash-2016-posters Collocated Conferences and Symposia =================================== ## DLS: Dynamic Languages Symposium The 12th Dynamic Languages Symposium (DLS) at SPLASH 2016 invites high quality papers reporting original research and experience related to the design, implementation, and applications of dynamic languages. Paper submission deadline: Fri 10 Jun 2016 Website: http://conf.researchr.org/track/dls-2016/dls-2016-papers ## GPCE: Generative Programming: Concepts & Experiences Generative and component approaches and domain-specific abstractions are revolutionizing software development just as automation and componentization revolutionized manufacturing. Raising the level of abstraction in software specification has been a fundamental goal of the computing community for several decades. Key technologies for automating program development and lifting the abstraction level closer to the problem domain are Generative Programming for program synthesis, Domain-Specific Languages (DSLs) for compact problem-oriented programming notations, and corresponding Implementation Technologies aiming at modularity, correctness, reuse, and evolution. As the field matures Applications and Empirical Results are of increasing importance. The International Conference on Generative Programming: Concepts & Experiences (GPCE) is a venue for researchers and practitioners interested in techniques that use program generation, domain-specific languages, and component deployment to increase programmer productivity, improve software quality, and shorten the time-to-market of software products. In addition to exploring cutting-edge techniques of generative software, our goal is to foster further cross-fertilization between the software engineering and the programming languages research communities. Abstract submission deadline: Fri 17 Jun 2016 Paper submission deadline: Fri 24 Jun 2016 Website: http://www.gpce.org Call for papers (pdf): http://conf.researchr.org/getImage/gpce-2016/orig/GPCE16+-+Call+for+Papers.… Twitter: https://twitter.com/gpceconf Facebook: https://www.facebook.com/GPCEConference/ ## Scala Symposium The Scala Symposium is a forum for researchers and practitioners to share new ideas and results of interest to the Scala programming language community. We welcome a broad spectrum of research topics in many formats, going from student talks all the way to full 10-page research papers, indexed by the ACM Digital Library. Abstract submission deadline: Sun 17 Jul 2016 Paper submission deadline: Mon 25 Jul 2016 Website: http://2016.splashcon.org/track/scala-2016 ## SLE: Software Language Engineering Software Language Engineering (SLE) is the application of systematic, disciplined, and measurable approaches to the development, use, deployment, and maintenance of software languages. The term âsoftware languageâ is used broadly, and includes: general-purpose programming languages; domain-specific languages (e.g. BPMN, Simulink, Modelica); modeling and metamodeling languages (e.g. SysML and UML); data models and ontologies (e.g. XML-based and OWL-based languages and vocabularies). SLE aims to be broad-minded and inclusive about relevance and scope. We solicit high-quality contributions in areas ranging from theoretical and conceptual contributions to tools, techniques, and frameworks in the domain of language engineering. Topics relevant to SLE cover generic aspects of software languages development rather than aspects of engineering a specific language. Abstract submission deadline: Fri 17 Jun 2016 Paper submission deadline: Fri 24 Jun 2016 Website: http://2016.splashcon.org/track/sle-2016-papers Twitter: https://twitter.com/sleconf Facebook https://www.facebook.com/SLEconference/ Workshops ========= SPLASH'16 will host a record number of 16 workshops: ## AGERE! Programming based on Actors, Agents, and Decentralized Control The AGERE! workshop is aimed at focusing on programming systems, languages and applications based on actors, active/concurrent objects, agents and â more generally â high-level programming paradigms promoting a mindset of decentralized control in solving problems and developing software. The workshop is designed to cover both the theory and the practice of design and programming, bringing together researchers working on models, languages and technologies, and practitioners developing real-world systems and applications. Abstract submission deadline: Mon 1 Aug 2016 Paper submission deadline: Mon 15 Aug 2016 Website: http://2016.splashcon.org/track/agere2016 ## DSLDI: Domain-specific Language Design and Implementation Domain-Specific Language Design and Implementation (DSLDI) is a workshop intended to bring together researchers and practitioners interested in discussing how DSLs should be designed, implemented, supported by tools, and applied in realistic contexts. The focus of the workshop is on all aspects of this process, from soliciting domain knowledge from experts, through the design and implementation of the language, to evaluating whether and how a DSL is successful. More generally, we are interested in continuing to build a community that can drive forward the development of modern DSLs. Submission deadline talk proposals: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/dsldi2016 ## DSM: Domain-Specific Modeling Domain-specific languages provide a viable and time-tested solution for continuing to raise the level of abstraction, and thus productivity, beyond coding, making systems development faster and easier. When accompanied with suitable automated modeling tools and generators it delivers to the promises of continuous delivery and devops. In domain-specific modeling (DSM) the models are constructed using concepts that represent things in the application domain, not concepts of a given programming language. The modeling language follows the domain abstractions and semantics, allowing developers to perceive them- selves as working directly with domain concepts. Together with frameworks and platforms, DSM can automate a large portion of software production. Submission deadline: Mon 15 Aug 2016 Website: http://2016.splashcon.org/track/dsm2016 ## FOSD: Feature-oriented Software Development Feature orientation is an emerging paradigm of software development. It supports the automatic generation of large-scale software systems from a set of units of functionality, called features. The key idea of feature-oriented software development (FOSD) is to explicitly represent similarities and differences of a family of software systems for a given application domain (e.g., database systems, banking software, text processing systems) with the goal of reusing software artifacts among the family members. Submission deadline: Mon 1 Aug 2016 Website: http://www.fosd.net/workshop2016 Call for papers: http://conf.researchr.org/getImage/FOSD-2016/orig/FOSD+2016+-+CFP.pdf ## ITSLE: Industry Track Software Language Engineering Industry Track for Software Language Engineering (ITSLE) is a workshop to bring together practitioners and researchers from industry and academia working on the area of software language engineering. Domain Specific Languages (DSLs) and Model-Driven Software Engineering (MDSE) techniques are being developed and used broadly in industry. However, as the size and complexity of software systems steadily increase, so does the cost of maintaining and improving the DSL and MDSE techniques and tools. It introduces new challenges such as language co-evolution, maintainability of legacy software using older version of DSLs and MDSE techniques, and extendability and scalability of these techniques. Some of these challenges have been addressed by the SLE research community and some remain unsolved. Submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/itsle2016 ## LWC@SLE: Language Workbench Challenge Language workbenches are tools for software language engineering. They distinguish themselves from traditional compiler tools by providing integrated development environment (IDE) support for defining, implementing, testing and maintaining languages. Not only that, languages built with a language workbench are supported by IDE features as well (e.g., syntax highlighting, outlining, reference resolving, completion etc.). As a result, language workbenches achieve a next level in terms of productivity and interactive editor support for building languages, in comparison to traditional batch-oriented, compiler construction tools. The goal of this workshop is twofold. First: exercise and assess the state-of-the-art in language workbenches using challenge problems from the user perspective (i.e. the language designer). Second: foster knowledge exchange and opportunities for collaboration between language workbench implementors and researchers. Submission deadline of solutions: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/lwc2016 ## META The Metaâ16 workshop aims to bring together researchers working on metaprogramming and reflection, as well as users building applications, language extensions such as contracts, or software tools. With the changing hardware and software landscape, and increased heterogeneity of systems, metaprogramming becomes an important research topic to handle the associate complexity once more. Contributions to the workshop are welcome on a wide range of topics related to design, implementation, and application of metaprogramming techniques, as well as empirical studies on and typing for such systems and languages. Abstract submission: Wed 27 Jul 2016 Paper submission: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/meta2016 ## Mobile! Mobile application use and development is experiencing enormous growth, and by 2016 more than 200 billion apps have been downloaded. The mobile domain presents new challenges to software engineering. Mobile platforms are rapidly changing, with diverse capabilities including various input modes, wireless communication types, on-device memory and disk capacities, and sensors. Applications function on wide ranges of platforms, requiring scaling according to hardware. Many applications interact with third-party services, requiring application development with effective security and authorization processes for those dataflows. âBring your own deviceâ policies pose security challenges including employer and employee data privacy. Developing secure mobile applications requires new tools and practices such as improved refactoring tools for hybrid applications; polyglot applications; and testing techniques for multiple devices. This workshop aims to establish a community of researchers and practitioners, leading to further research in mobile development. Paper submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/mobile2016 ## NOOL: New Object-Oriented Languages NOOL-16 is a new unsponsored workshop to bring together users and implementors of new(ish) object oriented systems. Through presentations, and panel discussions, as well as demonstrations, and video and audiotapes, NOOL-16 will provide a forum for sharing experience and knowledge among experts and novices alike. We invite technical papers, case studies, and surveys in the following areas, related to theory of object oriented programming, new languages, implementation of languages, tools and environment, applications and related work. Abstract submission deadline: Thu 1 Sep 2016 Website: http://2016.splashcon.org/track/nool2016 ## PLATEAU: Workshop on Evaluation and Usability of Programming Languages and Tools Programming languages exist to enable programmers to develop software effectively. But how efficiently programmers can write software depends on the usability of the languages and tools that they develop with. The aim of this workshop is to discuss methods, metrics and techniques for evaluating the usability of languages and language tools. The supposed benefits of such languages and tools cover a large space, including making programs easier to read, write, and maintain; allowing programmers to write more flexible and powerful programs; and restricting programs to make them more safe and secure. PLATEAU gathers the intersection of researchers in the programming language, programming tool, and human-computer interaction communities to share their research and discuss the future of evaluation and usability of programming languages and tools. Paper submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/plateau2016 ## Parsing@SLE Parsing@SLE 2016 is the fourth annual workshop on parsing programming languages. The intended participants are the authors of parser generation tools and parsers for programming languages and other software languages. For the purpose of this workshop âparsingâ is a computation that takes a sequence of characters as input and produces a syntax tree or graph as output. This possibly includes tokenization using regular expressions, deriving trees using context-free grammars, and mapping to abstract syntax trees. The goal is to bring together todayâs experts in the field of parsing, in order to explore open questions and possibly forge new collaborations. The topics may include algorithms, implementation and generation techniques, syntax and semantics of meta formalisms (BNF), etc. We expect to attract participants that have been or are developing theory, techniques and tools in the broad area of parsing. Abstract submission deadline: Fri 9 Sep 2016 Website: http://2016.splashcon.org/track/parsing2016 ## REBLS: Reactive and Event-based Languages & Systems Reactive programming and event-based programming are two closely related programming styles that are becoming ever more important with the advent of advanced HPC technology and the ever increasing requirement for our applications to run on the web or on collaborating mobile devices. A number of publications on middleware and language design â so-called reactive and event-based languages and systems (REBLS) â have already seen the light, but the field still raises several questions. For example, the interaction with mainstream language concepts is poorly understood, implementation technology is in its infancy and modularity mechanisms are almost totally lacking. Moreover, large applications are still to be developed and patterns and tools for developing reactive applications is an area that is vastly unexplored. Paper submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/rebls2016 ## RUMPLE: ReUsable and Modular Programming Language Ecosystems The RUMPLEâ16 workshop is a venue for discussing a wide range of topics related to modular approaches to programming language implementation, extensible virtual machine architectures, as well as reusable runtime components such as dynamic compilers, interpreters, or garbage collectors. One of the main goals of the workshop is to bring together both researchers and practitioners and facilitate effective sharing of their respective experiences and ideas. We welcome presentation proposals in the form of extended abstracts discussing experiences, work-in-progress, as well as future visions from the academic as well as industrial perspective. Extended abstract submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/rumple2016 ## SA-MDE: Tutorial on MDD with Model Catalogue and Semantic Booster With the model-driven development (MDD) approach to software, rather than building each system from scratch, one specifies a metamodel covering a whole class of similar systems, provides a universal generator to transform metamodel instances into executable programs, and specifies each system by a higher-level model conforming to the metamodel. When the application domain concerns semantically rich datasetsâwith structured entities, interlinked data, and sophisticated integrity constraintsâthen the MDD tools should support this richness: in the metamodel, in individual system models, and in the generation process. In this tutorial, we present the Model Catalogue and Semantic Booster, tools respectively for curating and exploiting semantically rich data in a MDD workflow, which are under development as part of ALIGNED. Participants will learn what the tools can do, gain hands-on experience with using them, and be able to contribute challenges and suggestions for future development. Website: http://2016.splashcon.org/track/samde2016 ## SEPS: Software Engineering for Parallel Systems This workshop provides a stable forum for researchers and practitioners dealing with compelling challenges of the software development life cycle on modern parallel platforms. The increased complexity of parallel applications on modern parallel platforms (e.g. multicore/manycore, distributed or hybrid) requires more insight into development processes, and necessitates the use of advanced methods and techniques supporting developers in creating parallel applications or parallelizing and re-engineering sequential legacy applications. We aim to advance the state of the art in different phases of parallel software development, covering software engineering aspects such as requirements engineering and software specification; design and implementation; program analysis, profiling and tuning; testing and debugging. Paper submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/seps2016 ## VMIL: Virtual Machines and Intermediate Languages The VMIL workshop is a forum for research in virtual machines and intermediate languages. It is dedicated to identifying programming mechanisms and constructs that are currently realized as code transformations or implemented in libraries but should rather be supported at VM level. Candidates for such mechanisms and constructs include modularity mechanisms (aspects, context-dependent layers), concurrency (threads and locking, actors, capsules, processes, software transactional memory), transactions, development tools (profilers, runtime verification), etc. Topics of interest include the investigation of which such mechanisms are worthwhile candidates for integration with the run-time environment, how said mechanisms can be elegantly (and reusably) expressed at the intermediate language level (e.g., in bytecode), how their implementations can be optimized, and how virtual machine architectures might be shaped to facilitate such implementation efforts. Paper submission deadline: Mon 1 Aug 2016 Website: http://2016.splashcon.org/track/vmil2016 ## WODA: Workshop on Dynamic Analysis The International Workshop on Dynamic Analysis (WODA) is the place where researchers interested in dynamic analysis and related topics can meet and discuss current research, issues, and trends in the field. WODA exists since 2003 and has been co-located with several different SE/PL conferences in the past, including ICSE, ISSTA, ASPLOS, and SPLASH. See https://sites.google.com/site/scwoda/ for the history of WODA. The 2016 edition of WODA will be a mix of invited talks by high-visibility researchers in the community and presentations of submitted workshop papers. Submission deadline: Fri 19 Aug 2016 Website: http://2016.splashcon.org/track/woda2016

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On Class and Method comments
by Dimitris Chloupis May 17, 2016

May 17, 2016

I really like to start writing some class and method comments to make Pharo image more beginner friendly. Are there any guidelines when and how to comment classes and methods ? What about inline comments ?

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TextAction bugs
by Alistair Grant May 17, 2016

May 17, 2016

Hi All, TextAction appears to have a couple of issues: TextAction>>actOnClick: anEvent for: anObject in: paragraph editor: editor "sent when a user clicks on a piece of text to which I am applied in an editor" "may be self is included in the event or an Object. " ^ actOnClickBlock cull: self cull: anEvent cull: anObject cull: paragraph cull: editor #cull:cull:cull:cull:cull: doesn't exist, so should be something like: TextAction>>actOnClick: anEvent for: anObject in: paragraph editor: editor "sent when a user clicks on a piece of text to which I am applied in an editor" "may be self is included in the event or an Object. " ^ actOnClickBlock valueWithEnoughArguments: (Array with: self with: anEvent with: anObject with: paragraph with: editor) It is also missing the Rubric version: TextAction>>rubActOnClick: anEvent for: anObject in: paragraph editor: editor "sent when a user clicks on a piece of text to which I am applied in an editor" "may be self is included in the event or an Object. " ^ actOnClickBlock valueWithEnoughArguments: (Array with: self with: anEvent with: anObject with: paragraph with: editor) I've followed the convention in the other implementations of #rubActOnClick:for:in:editor: and reimplemented the code, but it could just as easily call #actOnClick:for:in:editor:. Any reason not to submit this as a formal bug report? Should it be submitted as two separate bug reports since they are in separate packages? Thanks! Alistair

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OSSubprocess for Windows discussion [WAS] Re: OSProcess in Pharo 5?
by Mariano Martinez Peck May 16, 2016

May 16, 2016

On Mon, May 16, 2016 at 9:25 AM, Mariano Martinez Peck < marianopeck(a)gmail.com> wrote: > > > On Sun, May 15, 2016 at 11:19 AM, Ben Coman <btc(a)openinworld.com> wrote: > >> On Sat, May 14, 2016 at 8:06 AM, Mariano Martinez Peck >> <marianopeck(a)gmail.com> wrote: >> > If you are only interested in Unix / Linux / OSX, >> >> What is the plan for Windows support? >> > > I am not planning to add that. What I have found, is that tools that try > to provide the same API for all platforms do not end up doing well or they > limit the specific benefits of each custom platform. I > > Sorry...shortcut sent email before I finished it. I am not planning to add that. What I have found, is that tools that try to provide the same API for all platforms do not end up doing well or they limit the specific benefits of each custom platform. I very much prefer the approach used by GitFileTree and others. That is... AT YOUR APPLICATION level, you check wether you are on windows or not. If you are under Linux/OSX, then you may want to use OSProcess / OSSubprocess. And if you are in windows, then you may want to use ProcessWrapper. A simple IF or a strategy or whatever that calls the right API. That way you can customize the code for each platform better. Finally, again, if someone wants a unified API, then I don't think it should be at OSProcess / OSSubprocess level. I would write an API that internally calls either ProcessWrapper or OS(Sub)Process. But I wouldn't use that API as mentioned above. Cheers, > cheers -ben >> >> > then you may want to try >> > OSSubprocess (it does work correctly in Pharo 5.0) >> > >> > https://github.com/marianopeck/OSSubprocess >> > >> > Cheers, >> > >> > >> > >> > On Fri, May 13, 2016 at 8:03 PM, PAUL DEBRUICKER <pdebruic(a)gmail.com> >> wrote: >> >> >> >> Hi - >> >> >> >> >> >> Is OSProcess the thing to use in Pharo 5 if you want to run a bash >> command >> >> and then bring the result into a running image? >> >> >> >> >> >> It seems to be locking up an image I've got with code that previously >> >> worked in Pharo 4. >> >> >> >> >> >> Thanks >> >> >> >> >> >> Paul >> > >> > >> > >> > >> > -- >> > Mariano >> > http://marianopeck.wordpress.com >> >> > > > -- > Mariano > http://marianopeck.wordpress.com > -- Mariano http://marianopeck.wordpress.com

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OSProcess in Pharo 5?
by PAUL DEBRUICKER May 16, 2016

May 16, 2016

Hi - Is OSProcess the thing to use in Pharo 5 if you want to run a bash command and then bring the result into a running image? It seems to be locking up an image I've got with code that previously worked in Pharo 4. Thanks Paul

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Update website request: Pharo 5.0 packages on ArchLinux
by laurent laffont May 15, 2016

May 15, 2016

Hi, I've updated Pharo packages for ArchLinux. Could you please update install procedure on http://pharo.org/gnu-linux-installation ? Install Pharo launcher + Spur + old VM using command line: $ yaourt pharo-launcher then run: $ pharo-launcher (or look into your desktop menu for Pharo Launcher) Note: PharoLauncher is automatically configured to run Pharo images with right VM. More informations on packages: - pharo-launcher: https://aur.archlinux.org/packages/pharo-launcher/ - pharo-spur-vm: https://aur.archlinux.org/packages/pharo-spur-vm/ - pharo-vm (old VM): https://aur.archlinux.org/packages/pharo-vm/ Thanks for Pharo 5 :) Laurent Laffont

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Presenting Pharo in Greece
by Dimitris Chloupis May 15, 2016

May 15, 2016

Hey I wanted to inform you that I will be doing a 30 minutes presentation of Pharo in Hackerspace , Athens so if there are any Greeks watching the list they are more than welcomed to join. My talk will focus on live coding and no familiarity with Pharo/Smalltalk or programming experience required. The talk will be 30 minutes and it will be given in 15:30 28th of May 2016 (Saturday) as part of Hackfest 2016 organized by Hackerspace in Athens. More info can be found here https://hackfest.gr/ This will be both the first time Pharo is presented in Greece and my first presentation so I am pretty excited about how it will go. Wish me luck :)

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Pharo and HiDPI
by Luis Felipe Strano Moraes May 15, 2016

May 15, 2016

Guys, What is the situation on Pharo with regards to HiDPI screens? Is anyone working on this, or can at least point to where it needs to be fixed? Best regards, Luis Strano

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MOOC mistakes
by Dimitris Chloupis May 15, 2016

May 15, 2016

I will use this thread to point some mistakes in MOOC first here Introduction -General Interface - English version https://www.fun-mooc.fr/courses/inria/41010/session01/courseware/f46620814d… it says "Zone2: upload videos in 3 different formats in order to view them offline" I assume by "upload" you mean "download"

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AWS Version 4 authentication + streaming upload
by PAUL DEBRUICKER May 14, 2016

May 14, 2016

Hi Sven, For AWS regions created after Jan 30 2014, AWS requires one to use version 4 of their authentication scheme (http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-authenticating-reques…) It describes a header and request signing process that is more involved than version 2 that is implemented in the Zinc AWS client. Sho Yoshida has already made an AWS client (https://github.com/newapplesho/aws-sdk-smalltalk) that works great for their version 4 non-streaming uploads to S3. It uses Zinc. I'm planning to add streaming and had some questions for you about how Zinc does streaming and where/how I should make some modifications. When streaming an upload you have to SHA256 each chunk of file data and attach its SHA to the subsequent chunk. The initial chunk gets the first chunk of file data and the SHA256 of the secret key. The last chunk is empty and has the SHA256 of the last chunk of file data. That is all described here http://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html. and example request is here http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html#example… My first inclination is to subclass ZnStreamingEntity, give the subclass an instVar to hold the secret key hash. And then extend ZnUtils to do all the hashing and extending of the stream in a frankenstein #awsHashedStreamFrom:to:size: . Does that seem like a reasonable approach? Do I need to adapt the server logic at all? It seems like I wouldn't. Thanks Paul

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