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• Pharo 1.0, un environnement open-source dérivé de Squeak simple et épuré pour se mettre à Smalltalk

  Pharo 1.0, un environnement open-source dérivé de Squeak Simple et épuré pour se mettre à Smalltalk Comme vous le savez, Smalltalk est un langage interprété. Pour s'y mettre, il existe plusieurs environnements, comme Visualworks, ou un des plus connus : Squeak. Mais le moins que l'on puisse dire, c'est que Squeak ne fait l'unanimité. En dépit de la qualité indéniable de l'environnement, ses petits bugs, son UI et d'autres défauts ont eu raison de la motivation de nombreux développeurs qui ont voulu s'essayer au Samltalk avec lui. Des anciens membres impliqués dans le projet Squeak (les responsables de Squeak 3.9) ont donc décidé de lancer un fork. « Nous a...

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• Particle system lifetimes in OpenGL ES 2

  - by user16547

  I don't know how to work with my particle's lifetimes. My design is simple: each particle has a position, a speed and a lifetime. At each frame, each particle should update its position like this: position.y = position.y + INCREMENT * speed.y However, I'm having difficulties in choosing my INCREMENT. If I set it to some sort of FRAME_COUNT, it looks fine until FRAME_COUNT has to be set back to 0. The effect will be that all particles start over at the same time, which I don't want to happen. I want my particles sort of live "independent" of each other. That's the reason I need a lifetime, but I don't know how to make use of it. I added a lifetime for each particle in the particle buffer, but I also need an individual increment that's updated on each frame, so that when PARTICLE_INCREMENT = PARTICLE_LIFETIME, each increment goes back to 0. How can I achieve something like that?

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• Fresh start outside Google's crapbox [on hold]

  - by Krzysztof Minister Bytu

  I might have been experimenting with my website too much and Google first cut the flow of visitors considerably and now I didn't get one for 4 days already. It's a joke that they've done this, because I've put a lot of work into it, but that's a topic for another day. My question is about further avoiding it. I want to take the partly improved design from that website onto a new one and get a new domain name. The question is: in that case, do I have to change the hosting option (it has my old website name in the address), or is changing the domain enough for Google to treat it as something new from a "fresh user". In other words, does Google get through the domain address and log into the actual hosting address? I'd hate to waste another few months of hard work, so I prefer to take every possible precaution but not paying for another hosting would make things easier on the wallet.

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• When should I decide what language and platforms I will use for a project?

  - by Mikalichov

  During your development process, when is the recommended phase to decide what platform to aim for, and what language to use? I figured that it would be better to choose at the beginning what would be your target platform, as it would affect your design decisions, and limit the language you are supposed to use. However, I have heard several stories of people developing their game with whatever language they were the most confident with, and then porting it to the various platforms. So, what is the best moment to choose? Before, during, after? If there is not one best choice, what factors should affect the decision?

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• Using XNA libraries in your Silverlight Windows Phone 7 applications

  I recently got an inquiry to my Microsoft Translator sample on if this would work with the Silverlight in the Windows Phone 7 SDK. I hadnt tried it before, so I created a sample Windows Phone 7 application and copied the code over. I used a basic UI to mock up the similarities: And then clicked the button. The text translated fine, but no audio. I didnt get any warnings that the WaveMSS code sample I was using wouldnt work. Then I remembered about XNA. NOTE: I actually think this is a bug...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Poll: What Are Your Favorite Silverlight TV Episodes?

  Its been 3 months since Silverlight TV first aired in mid January. Weve aired a variety of topics (from design centric to hardcore developer code to awesome demos) and a variety of guests (who can forget Ward Bell is his white fur jacket?). So far, our audience has watched our episodes for well over 600,000 views! Thank you! As we revisit the lineup and start scheduling the next series of shows, Id like to do a quick poll on what your favorite 3 episodes have been. So please click on this link...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• SNEAK PEEK: Another Silverlight theme pack preview

  Building on the positive feedback of the previous Silverlight application themes released last month (Cosmopolitan, Accent Color, and Windows) the design team is working on another theme targeting business application developers. We dont yet have an official name for this one yet (and to mitigate the confusion of internal code names again, Ill spare you the code name), but I wanted to put up a preview. Were turning this theme around FAST and I wanted to throw it out here in an initial iteration for...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Where does Rails get it's datetime for creating records?

  - by gwapEs9

  I have a rails app with a data model called 'jobs' and i'm faced with a critical design choice crossroads. I don't know enough about Rails and it's inner workings to be able to say for sure what I should do despite a complete read of the rails and ruby docs. I want to be able to accurately display the age of a job record in days. So when a customer logs in, they can see that the job they submitted is 'x' days old. Where does a rails app on Heroku get it's time stamps? From Heroku? or the customers system clock? If a customer has a out of date system clock and submits a job, it could really mess up the sorting of their job list, not to mention me the overseer of job records. Any advice out there? EDIT: Just to be clear, i'm not asking how to list jobs by their date, but to which clock does a rails app on Heroku base it's records.

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• Is the use of hashbang really a good idea? [on hold]

  - by user32642

  I've been working on a WordPress site lately that was design with hashbang or shebang in the dynamically generated URLs. After doing some research, I noticed that there was some preference by Google in their use and how it crawled the site. However, after I ran several sitemap generators and Screaming Frog SEO Spider, I realized that the only page being crawled was the index page. So now I am questioning the use of hashbangs. What do you think? Should I attempt to remove them? Or will it even matter? And does anyone know of a easy way to remove this? The site is www.modernvintage1005.com

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• Games with user-supplied artifical intelligence (AI) engines?

  - by RoboShop

  I remember Microsoft used to have this AI game for the .NET framework which allowed you to program a species and this species could be introduced to an "ecosystem" full of species that other people had programmed and they could interact with each other, etc. I can't remember what it was called, but I remembered thinking it was a pretty good idea. Are there any other similiar sites like that, which allows you to design some sort of AI engine and pit it against other programmer's creations? It could be an ecosystem type thing, or it could be a card or board game.

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• The life saver HttpContext.Current.Items["ParameterName"]

  - by MoezMousavi

  I got stocked passing parameter to one master page for some reasons, seems the page lifecycle and dynamic loading of the master pages has got some issues with defining public properties in the masterpage within my project. It did not set my values and as a result, properties became useless. A collegue just mentioned using HttpContext. have a look what  MSDN saying "Encapsulates all HTTP-specific information about an individual HTTP request" http://msdn.microsoft.com/en-us/library/system.web.httpcontext.aspx HttpContext.Current.Items["ParameterName"] Also, Page.Items could do the same thing. Page.Items, "Gets a list of objects stored in the page context" http://msdn.microsoft.com/en-us/library/system.web.ui.page.items.aspx as your master page and content page are rendered as a single document anyway.

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• Enterprise 2.0 - How to

  - by me

  Today I had a very interesting lecture at the  Fachhochschule Nordostschweiz "Hochschule für Wirtschaft" around How to design & implement an Enterprise 2. 0 solution. We had a great (and sometime pretty skeptical)  discussion around Social Value Models. The presentation can be found below. Enterprise 2.0 - How to View more presentations from Peter Reiser Feedback are always welcome.

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• SharePoint 2010: Architecture and Planning information

  - by Enrique Lima

  Recently I have been delivering Design and Planning Sessions at client sites, and as of recent SharePoint 2010 has been part of that mix. After the activity that goes on during those sessions getting towards the end of them is always a cross roads for clients.  Why?  Because it is time to kick the wheels.  Remind them, and remember, this is not a 1 or 4 weeks ordeal.  This has to be very well planned. If I am looking for information that is worth while and a great conversation starter, my landing point is the TechNet Library.  Here is focus on the Planning and Architecture documentation.  There are some great pieces of info, and a great set of planning worksheets. Here is the link to this section … http://technet.microsoft.com/en-us/library/cc261834.aspx

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• What steps should be taken to ensure that an open source database gets ready for production?

  - by I_like_traffic_lights

  I am considering using GridSQL in a production environment. However, I do have some indications that it is not ready. One is that it got excluded by the offering of EnterpriseDB a while ago, and the forums seem to report a few wrong results and relatively severe bugs. The alternatives to GridSQL, however cost around 100.000$ to buy, so I was thinking to utilize some of this money to ensure that GridSQL gets ready for production. At the same time, I could risk spending 50.000$ and months of work on the development of GridSQL, just to discover that the design was flawed and that a complete rewrite is needed. Then I would have to buy the commercial alternatives to GridSQL and the existence of my startup would be at risk. Question What steps would you take to ensure that there is as little risk as possible that the worst case scenario described above would happen? It is unrealistic that I could do much testing nor code review/coding myself (I am also not the best developer), so please describe where to find the guys that would need to do the work.

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• Should I use XNA (C#) or Java to create a basic game engine?

  - by Xboxking

  My project is to design and build a game engine (in just about 3 months). I've been looking at two options for this game engine, either make it with XNA (and C#) or Java. My experience with XNA/C# is zero to none, however I have been a Java programmer for around 4 years. I've had a little play around with both but I am still not sure what would be best to use (i.e. what would turn out better with my experience). XNA is obviously for making games and I would presume making a game engine would be slightly easier in this - however that said, there are numerous libraries available in Java that could be used for a game engine (such as lwjgl). What would be my best option and ideally produce the best results out of both XNA or Java? For your information, the game engine at the moment is a 2D one and is not too advanced (although I plan to extend it in the future). Thanks in advance for all answers!

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• Nokia promet une tablette sous Windows 8 et un smartphone "révolutionnaire" qui n'aura plus besoin d'être touché ou regardé

  Nokia promet une tablette sous Windows 8 et un smartphone "révolutionnaire" "Que les utilisateurs n'auront plus besoin de regarder ou de toucher" Le magazine spécialisé DigiTimes rapportait dans l'un de ses articles paru le 12 mars dernier que Nokia sous-traiterait actuellement la production d'une tablette de 10 pouces à une société chinoise, Compal Electronics. Selon ce même article, 200 000 unités seraient conçues dans un premier temps pour une commercialisation prévue au quatrième trimestre de cette année. Une nouvelle que Marko Ahtisaari, vice-président senior de la section Design de Nokia, a confirmé dans un entretien accordé au magazine finlandais Kavppalehti O...

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• Google modifie en profondeur l'interface des Google Docs pour faciliter le classement et la recherche dans la liste des documents

  Google modifie l'UI des Google Docs en profondeur Pour faciliter le classement, la recherche et la navigation dans la liste des documents Les Google Docs vont connaître une mise à jour importante rendue nécessaire, d'après le responsable du produit, par ses récentes évolutions. La suite bureautique en ligne est en effet quasiment devenue, en plus de son usage de base, un service de stockage de fichiers. L'année dernière, Google a ouvert sa plate-forme au téléchargement (l'upload) de tout type de fichiers. Pas simplement ceux compatible avec les applications hébergés (traitement de texte, présentation, tableur, etc.). Résultat, il est possible d'y héberger des vidéos, des photos, d...

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• D'après-vous, quels sont les smartphones les plus réussis sous Android ? Participez à notre sondage

  D'après-vous, quels sont les smartphones les plus réussis sous Android ? Participez à notre sondage La fragmentation d'Android est un problème délicat pour les développeurs. D'autant plus qu'il est double : des versions de l'OS pour smartphones d'un coté et pour tablettes de l'autre, et des versions différentes de l'OS au sein de chaque catégorie. A cette complexité s'en ajoute une autre (contrairement à iOS) : la diversité des hardwares. Dont la première pour les développeurs est la différence des tailles d'écran. Enfin (contrairement à Windows Phone dont l'UI (Metro) n'est pas modifiable par les constructeurs), Android permet à chaque industriel de personnaliser l'interfa...

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• Using git (or any version control) regarding migration from one language to another [on hold]

  - by Max Benin

  I'm polishing an old project that i released some years ago, and the main purpose on that, is to arrange some folder structures and port the entire code from actionscript to haxe. All the game features, assets and design will remain the same. I have some doubts regarding versioning the project in this circumstance. Assuming that the only thing that will be drastically changed is the code migration, is it correct maintaining the new project changes on the same repository ? I was thinking in tagging it something like V1.1 or Branch the entire project. But i'm afraid that i'm gonna deviate from the versioning patterns. How can i use this version control issue in the best practice way ? Thanks.

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• Build automation: Is it usual to use QMake for non-Qt projects?

  - by Raphael

  So, I'm planning to write a C++ library and I want it to be cross-platform, and as this library won't deal with UI and I want it to have as little dependencies as possible, I won't be using Qt (actually Qt won't really help me to achieve what I want, all I plan on using is STL and Boost). Now when it comes to build a cross-platform project, I really like QMake as it's extremely easy to use and I have experience with it. I also heard good things about CMake, though I really doubt it's as easy to use as QMake. Anyway, here is my question: Should I stick with build automation tool that I know or is QMake just out of context for a non-Qt project? Should I take this as an opportunity to learn CMake? Or is there a better alternative to these two?

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• Criteria for a language to be considered "object oriented"

  - by nist

  I had a discussion about OO programming today and by browsing the internet I found a lot of different specifications for object oriented languages. What are the requirements for a language to be object oriented? For myself an object oriented language must have classes, inheritance and encapsulation. Is C an object oriented language just because you can use structs and program with an object oriented design? Why/ why not? Are there any good sites/articles about this? And please, no Wikipedia links because I've already been there.

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• Ubuntu 11.10 Gnome 3 shell doesn't have the Activities menu or launcher

  - by Kelly

  I installed it from apt-get and it only has Applications and Places instead of the Activities menu, it also doesn't have the dock or launcher. Using the super key does nothing, as neither does mousing to the upper left corner. I have also installed the tweak tool, but it looks like all the settings are not being applied to the UI. Am I missing something. I have never used Gnome 3 before as I recently upgraded from Ubuntu 10.4, which I believe was Gnome 2 for the shell. I have been reading the documentation on the Gnome site and it says there should be an Activity menu and other items that aren't there. Thanks

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• In what way I can implement packet filtering function in C++/C#?

  - by Network study

  Background: I am going to design a firewall-like application (with GUI) which will include several functions such as Packet sniffing and packet filtering. Both of the functions should be implemented to support different protocol levels including application, transport, network and link layer. I only know a little in C#.Net programming to perform the IP packet sniffing. It is also known that packet filtering requires the techniques in WFP or LSP and packet sniffing in application requires dll hooking. Questions: I am not sure which programming language(either C++ or C#) would be suitable for designing such an application described above. If I want to implement the packet filtering function, any libraries will be needed? edit01: Someone suggest that winDivert would be helpful, is it true?

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• jQuery 1.8.1 est disponible, une version de maintenance qui corrige de nombreux bogues, la documentation du framework stagne encore

  jQuery 1.8.1 est disponible Cette première version de maintenance corrige les bogues découverts juste après la sortie de la version 1.8.0. L'équipe de développement rappelle aux développeurs qu'ils doivent tester les versions bêta et la version candidate sans attendre la sortie de la version finale pour se manifester. Pour être compatible avec jQuery 1.8.1, il convient d'utiliser jQuery UI 1.8.23 et jQuery Mobile 1.1.1 ou des versions ultérieures. N'oubliez pas d'utiliser un doctype valide : <!doctype html>. La majorité des problèmes viennent des développeurs ...

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• Will learning wxpython worth it in future? [on hold]

  - by user108437

  As we know that microsoft has been pushing Windows 8.1 which strongly uses XAML to design the app and for windows desktop mode WPF is another framework (which probably some thinks it fails) However, in old times, developer write windows form software using MFC or something alike that they have to do their own main loop, etc, etc, and I recently loves python and learning python certainly worth it, since there are still ironpython out there that uses .NET, but I am not sure whether my move to also learn wxpython for building windows software that does not requires .NET worth it also i notice wxpython is somehow old and still uses python 2.7, while today, python already version 3.3, beside that the books are old book published in 2007, and there seems no much hype on building windows form without .NET anymore because .NET is mostly preinstalled in new windows version. So my humble question is, whether should I learn python + wxpython or only python? Is there any benefit that I might not notice for capable in writing windows application that does not use .NET?

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