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  • How to install Hadoop?

    - by Anitha
    I am trying to install Hadoop in Ubuntu 12.04 version. Following the instructions from http://michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/, I installed java-6-openjdk from Ubuntu software-center. I have set java_home in .bashrc. Also set java_home in Hadoop conf/env.sh. While formatting the namenode, I am getting the following error: usr/lib/jvm/java-6-openjdk/bin/java no such file or directory. Thank you. But it's a 64bit OS.

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  • How are video card\graphics drivers written exactly? [closed]

    - by Bigyellow Bastion
    I was thinking, since I want an application layer for my operating system, how or what would be the best way to write, or better understand how to write, my own graphics device drivers or software to enable application layered software to request data through my graphics system (I.e. windows, icons, mouse pointers). I don't need every little detail, I'd just like some possible insight on the procedure one may accomplish this feat in, perhaps the best way to understand the interaction between the graphics GUI rendering software to the hardware interaction directly, and the application software requesting the graphics driver itself.

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  • Wireframing: A Day In the Life of UX Workshop at Oracle

    - by ultan o'broin
    The Oracle Applications User Experience team's Day in the Life (DITL) of User Experience (UX) event was run in Oracle's Redwood Shores HQ for Oracle Usability Advisory Board (OUAB) members. I was charged with putting together a wireframing session, together with Director of Financial Applications User Experience, Scott Robinson (@scottrobinson). Example of stunning new wireframing visuals we used on the DITL events. We put on a lively show, explaining the basics of wireframing, the concepts, what it is and isn't, considerations on wireframing tool choice, and then imparting some tips and best practices. But the real energy came when the OUAB customers and partners in the room were challenge to do some wireframing of their own. Wireframing is about bringing your business and product use cases to life in real UX visual terms, by creating a low-fidelity drawing to iterate and agree on in advance of prototyping and coding what is to be finally built and rolled out for users. All the best people wireframe. Leonardo da Vinci used "cartoons" on some great works, tracing outlines first and using red ochre or charcoal dropped through holes in the tracing parchment onto the canvas to outline the subject. (Image distributed under Wikimedia commons license) Wireframing an application's user experience design enables you to: Obtain stakeholder buy-in. Enable faster iteration of different designs. Determine the task flow navigation paths (in Oracle Fusion Applications navigation is linked with user roles). Develop a content strategy (readability, search engine optimization (SEO) of content, and so on) Lay out the pages, widgets, groups of features, and so on. Apply usability heuristics early (no replacement for usability testing, but a great way to do some heavy-lifting up front). Decide upstream which functional user experience design patterns to apply (out of the box solutions that expedite productivity). Assess which Oracle Application Development Framework (ADF) or equivalent technology components can be used (again, developer productivity is enhanced downstream). We ran a lively hands-on exercise where teams wireframed a choice of application scenarios using the time-honored tools of pen and paper. Scott worked the floor like a pro, pointing out great use of features, best practices, innovations, and making sure that the whole concept of wireframing, the gestalt, transferred. "We need more buttons!" The cry of the energized. Not quite. The winning wireframe session (online shopping scenario) from the Applications UX DITL event shown. Great fun, great energy, and great teamwork were evident in the room. Naturally, there were prizes for the best wireframe. Well, actually, prizes were handed out to the other attendees too! An exciting, slightly different aspect to delivery of this session made the wireframing event one of the highlights of the day. And definitely, something we will repeat again when we get the chance. Thanks to everyone who attended, contributed, and helped organize.

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  • Besxt Text-to-Speech Solution for my Website

    - by Tim Marshall
    I'm working on the 'Ease of Access' section of my website with the options to increase the font-size displayed on pages to a minimum, invert colours and whatnot. I wish to implement a plugin which, if enabled by the user, to read content on my website. Presumably my best option is a website plugin, however there might be some programming I've not come across which allows the likes of PHP to read content. I'm not entirely sure how this all works. Best Regards, Tim

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  • A TDD Journey: 3- Mocks vs. Stubs; Test Frameworks; Assertions; ReSharper Accelerators

    Test-Driven Development (TDD) involves the repetition of a very short development cycle that begins with an initially-failing test that defines the required functionality, and ends with producing the minimum amount of code to pass that test, and finally refactoring the new code. Michael Sorens continues his introduction to TDD that is more of a journey in six parts, by implementing the first tests and introducing the topics of Test doubles; Test Runners, Constraints and assertions

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  • What should you say in post-interview?

    - by ??? Shengyuan Lu
    When you are leaving your company, you will be post-interviewed. As best practice, you shouldn't say something bad about your company, because it will "burn your bridge", another best practice is to keep silence if the company really sucks. I think if you decide to leave, there must be a reason(s) making you really unhappy, and I am sure you will have something really important to tell your employer. Then what is your attitude about post-interview?

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  • Creating WPF Prototypes with SketchFlow

    Prototyping with Sketchflow transforms what was once a frustrating and time-consuming chore. With SketchFlow, WPF prototypes can be created and changed with amazing ease. SketchFlow is WPF's secret weapon. Well, it was secret until Michael Sorens produced this article.

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  • Essential Tools for the WPF Novice

    When Michael sets out to do something, there are no half-measures; So when he set out to learn WPF, we all stand to benefit from the thorough research that he put into the task. He wondered what utility applications could assist programming in WPF. Here are the fruits of all his work.

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  • Using Three Flavors of LINQ To Populate a TreeView

    LINQ is a valuable technology. LINQ to XML, LINQ to Objects and LINQ to XSD, in particular, can save valuable time for developers and produce more maintainable code. Michael describes how he used three different flavours of LINQ to map XML to a Treeview component that he used in the QueryPicker control that was the subject of a two-part article here on Simple-Talk.

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  • Starting all over again?

    - by kyndigs
    Have you ever been developing something and just came to a point where you think that this is rubbish, the design is bad and although I will lose time it will be better to just start all over again? What should you consider before making this step? I know it can be drastic in some cases, is it best to just totally ignore what you did before, or take some of the best bits from it? Some real life examples would be great.

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  • Mis à jour : Configuration d'une infrastructure à clés publiques à 2 niveaux sous Windows Server 200

    Configuration d'une infrastructure à clés publiques à 2 niveaux sous Windows 2008 (R2), par Michaël Todorovic Citation: Ce document va vous permettre de mettre en place une infrastructure à clés publiques (aussi nommée PKI) à deux niveaux grâce à Microsoft Windows 2008. Cette PKI pourra vous être utile dans beaucoup de cas : serveur web sécurisé, serveur de messagerie sécurisé, distribution automatisée de cert...

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  • Google I/O 2012 - Data Driven Storytelling

    Google I/O 2012 - Data Driven Storytelling Michael Fink, Yinnon Haviv, Dani Bacon From a single chart to elaborate data driven storytelling, Google Chart Tools now provides a crisp and accessible experience based on our new HTML5 gallery. Come and learn how you can use animations, annotations and other visual semantics and to take user-interaction with rich data, to the next level. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 563 10 ratings Time: 53:05 More in Science & Technology

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  • Is there a Railstutorial-quality tutorial for a PHP framework?

    - by tnorthcutt
    Is there a tutorial along the lines of Michael Hartl's Rails Tutorial for a (widely used) PHP framework? Obviously there are tons of tutorials for e.g. Codeigniter, CakePHP, Symfony, etc., but I haven't been able to find one that is as extensive as Rails Tutorial is. Ideally, I'd like something that takes you from nothing to building a complete, functioning application with at least a decent amount of complexity.

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  • Finding duplicate files?

    - by ub3rst4r
    I am going to be developing a program that detects duplicate files and I was wondering what the best/fastest method would be to do this? I am more interested in what the best hash algorithm would be to do this? For example, I was thinking of having it get the hash of each files contents and then group the hashes that are the same. Also, should there be a limit set for what the maximum file size can be or is there a hash that is suitable for large files?

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  • Animate multiple entities

    - by Robert
    I'm trying to animate multiple(3) entities using one model(IQM format). It's working but performance is really bad because I'm calling animate function for each entity in my game loop (I think problem is there). What's the best way to animate multiple entities (with different animation ofc) in OpenGL? I think I can try build one VBO / entity for better performances but I don't think it's the best way to do it.

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  • Technologies stack to create soccer game vizualization on web page [on hold]

    - by Lambrusco
    I want to create soccer game vizualization. What technologies will be best to create such one for web page? On input I have two teams with players. I have theory about their movements, the movement of the ball on field and so on. I just want to vizualize their movements. What will be the best technology stack? I mean programming languages (C++, Ruby, Java, PHP) and vizualization ways (Flash, HTML5, JS)

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  • Ask the Readers: Which Browser is a Must-Have for You on Linux?

    - by Asian Angel
    Linux systems all come with their own particular set of default browsers, but those browsers may not be the ones you want or need. This week we would like to know which browser (or browsers) are considered “must-have” on your Linux systems. As a general rule many Linux distributions have Firefox and/or Konqueror as one of the default installation browsers. During this past year the open source browser Chromium has also been gaining a lot of traction as a default install for systems. For most people these browsers are the ones that they like best or feel work well enough to not make any changes. But there are other people who want more than what is available with a default system install. They may favor a particular browser for its’ extensibility or speed…others prefer a particular browser for its’ features or minimalist UI. Whatever your preferences may be, there is a browser out there to fit your style. Some people may even prefer to run only bleeding edge nightly releases or add them in with their current browsers. The important part is that you have choices when it comes to your Linux system. What we would like to know this week is which browser or browsers you make sure are always installed on your Linux systems. Does the Linux system you use already have your favorite browser installed as part of the default set? Maybe you are content with using the default set of browsers that come with the system. Or perhaps you prefer to rework the entire browser setup on your system by removing the defaults and adding your favorites. Let us know which browsers you consider “must have” and why in the comments! Note: You can make up to two selections on today’s poll since most people will likely have more than one browser that they make certain is always installed. How-To Geek Polls require Javascript. Please Click Here to View the Poll. Latest Features How-To Geek ETC How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 The 50 Best How-To Geek Windows Articles of 2010 The 20 Best How-To Geek Explainer Topics for 2010 How to Disable Caps Lock Key in Windows 7 or Vista How to Use the Avira Rescue CD to Clean Your Infected PC BotSync Enables Secure FTP File Synchronization on Android Devices Enjoy Beautiful City Views with the Cityscape Theme for Windows 7 Luigi Installs Any OS on Google’s Cr-48 Notebook DIY iPad Stylus Offers Pen-Based Interaction on the Cheap Serene Blue Ubuntu Wallpaper for Your Desktop Enjoy Old School Style Video Game Fun with Chicken Invaders

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  • Hosting media on separate server than web server

    - by user18832
    Basically I have a website hosted by a web hosting company which I have limited access to (ftp upload etc). I have a home server which I use to record and store audio files. Is there an elegant way or best practice to host a page on the webserver which links to the audio files? I'm considering hosting a page on the home server and redirecting to that from the web server, or setting up something like rsync to push the audio files to the web server - I'm just not certain which solution would be best.

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  • A TDD Journey: 1-Trials and Tribulations

    Test-Driven Development (TDD) has a misleading name, because the objective is to design and specify that the system you are developing behaves in the ways that the customer expects, and to prove that it does so for the lifetime of the system. It isn't an intuitive way of coding but by automating the specifications of a system, we end up with tests and documentation as a by-product. Michael Sorens starts an introduction to TDD that is more of a journey in six parts:

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