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• Upcoming GWB Site Maintenance & Downtime This Weekend

  - by Staff of Geeks

  We'll be performing routine maintenance and a code release this weekend, from late Saturday night to early Sunday morning. There will be moments of site downtime but we'll minimize this as much as possible of course. We intend for the following fixes & features to go to production: Over 30 Windows Update hotfixes & security updatesBug Fix: Homepage of GWB currently listing posts by create date, but should be listing by first-time publish date. Thanks to Chris Gardner for alerting us about this. Bug Fix: Broken thumbnail images in the Hot Topics and Most Popular areas. Thanks to .ToString(theory) for emphasizing this one. Bug Fix: Not able to create/edit posts in the admin tool using IE 10. (Thanks Benny Matthew)Bug Fix: Admin blog post rich text editor not working in IE 10. Bug Fix: New Twitter connections cannot be established because the twitter API URL has changed. Feature: New "Minimal" Template using fluid Twitter Bootstrap/Cerulean theme. Feature: Integration with AirBrake exception handling.Feature: Change bio pics in the GWB main feed to be hyperlinked.Feature: Change hyperlink of MVP icons in the GBW Blogger List area to go directly to the Microsoft MVP search results page for that MVP's name. Thanks once again for your patience as we strive to improve the site!Ben BarrethGeeksWithBlogs Community Builder/Software Developer

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• Wrong package for Idle-python2.7?

  - by adelval

  I'm running python 2.7 in Ubuntu 3.10, and idle (idle-python2.7) has stopped working. Whenever I try to open a file in a editor window, it is blank, though the file does exist and is not empty/blank. Furthermore, it is not possible to close idle after this, except via a terminal kill command. Idle was working fine before. The problem appeared after I installed a number of things, including idlex, various scipy modules and mpmath, but after trying to repair it in several ways, it seems to be caused by Ubuntu's official idle package. I get this error in the terminal when trying to open a file in idle: Exception in Tkinter callback [...lines ommitted for brevity...] File "/usr/lib/python2.7/idlelib/IOBinding.py", line 129, in coding_spec for line in lst: NameError: global name 'lst' is not defined If you look at the code, it looks like an obvious bug: indeed lst is not defined in the function coding_spec. Furthermore, the source file IOBinding.py in http://fossies.org/dox/Python-2.7.5/IOBinding_8py_source.html is different and doesn't show the problem. Thinking that one of the recently packages had overwritten the file somehow, I've tried a number of things, including reinstalling all Python packages from synaptic, but the wrong IOBinding.py is still there. The reason I think the problem lies with the package itself is that I finally did sudo apt-get remove idle, verified that the idlelib directory was empty, and reinstalled with sudo apt-get install idle; but the wrong IOBinding.py file came back again. I can in fact make idle work again by simply replacing lst by str in the code, but to me that's clearly a no-no. I'm not to happy either about trying to replace just that file from the source python distribution, as other files may be wrong. I want to get the right files from the official package.

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• Why not have a High Level Language based OS? Are Low Level Languages more efficient?

  - by rtindru

  Without being presumptuous, I would like you to consider the possibility of this. Most OS today are based on pretty low level languages (mainly C/C++) Even the new ones such as Android uses JNI & underlying implementation is in C In fact, (this is a personal observation) many programs written in C run a lot faster than their high level counterparts (eg: Transmission (a bittorrent client on Ubuntu) is a whole lot faster than Vuze(Java) or Deluge(Python)). Even python compilers are written in C, although PyPy is an exception. So is there a particular reason for this? Why is it that all our so called "High Level Languages" with the great "OOP" concepts can't be used in making a solid OS? So I have 2 questions basically. Why are applications written in low level languages more efficient than their HLL counterparts? Do low level languages perform better for the simple reason that they are low level and are translated to machine code easier? Why do we not have a full fledged OS based entirely on a High Level Language?

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• Access Violation when trying to bind Vertex Object Array

  - by Paul

  I've just started digging into OpenGL and I've run into a problem trying to set a VOA. It's giving me a run-time error of : An unhandled exception of type 'System.AccessViolationException' At // Create and bind a VAO GLuint vao; glGenVertexArrays(1, &vao); glBindVertexArray(vao); I have searched the internet high and low for a solution and I haven't found one. The rest of my function looks like this: int main(array<System::String ^> ^args) { // Initialise GLFW if( !glfwInit() ) { fprintf( stderr, "Failed to initialize GLFW\n" ); return -1; } glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 0); // 4x antialiasing glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3); // We want OpenGL 3.3 glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 3); glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); //We don't want the old OpenGL // Open a window and create its OpenGL context if( !glfwOpenWindow( 800, 600, 0,0,0,0, 32,0, GLFW_WINDOW ) ) { fprintf( stderr, "Failed to open GLFW window\n" ); glfwTerminate(); return -1; } // Initialize GLEW if (glewInit() != GLEW_OK) { fprintf(stderr, "Failed to initialize GLEW\n"); return -1; } glfwSetWindowTitle( "Game Engine" ); // Create and bind a VAO GLuint vao; glGenVertexArrays(1, &vao); glBindVertexArray(vao); glfwEnable( GLFW_STICKY_KEYS );

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• Better way to generate enemies of different sub-classes

  - by KDiTraglia

  So lets pretend I have an enemy class that has some generic implementation and inheriting from it I have all the specific enemies of my game. There are points in my code that I need to check whether an enemy is a specific type, but in Java I have found no easier way than this monstrosity... //Must be a better way to do this if ( enemy.class.isAssignableFrom(Ninja.class) ) { ... } My partner on the project saw these and changed them to use an enum system instead public class Ninja extends Enemy { //EnemyType is an enum containing all our enemy types public EnemyType = EnemyTypes.NINJA; } if (enemy.EnemyType = EnemyTypes.NINJA) { ... } I also have found no way to generate enemies on varying probabilities besides this for (EnemyTypes types : enemyTypes) { if ( (randomNext = (randomNext - types.getFrequency())) < 0 ) { enemy = createEnemy(types.getEnemyType()); break; } } private static Enemy createEnemy(EnemyType type) { switch (type) { case NINJA: return new Ninja(new Vector2D(rand.nextInt(getScreenWidth()), 0), determineSpeed()); case GORILLA: return new Gorilla(new Vector2D(rand.nextInt(getScreenWidth()), 0), determineSpeed()); case TREX: return new TRex(new Vector2D(rand.nextInt(getScreenWidth()), 0), determineSpeed()); //etc } return null } I know java is a little weak at dynamic object creation, but is there a better way to implement this in a way such like this for (EnemyTypes types : enemyTypes) { if ( (randomNext = (randomNext - types.getFrequency())) < 0 ) { //Change enemyTypes to hold the classes of the enemies I can spawn enemy = types.getEnemyType().class.newInstance() break; } } Is the above possible? How would I declare enemyTypes to hold the classes if so? Everything I have tried so far as generated compile errors and general frustration, but I figured I might ask here before I completely give up to the huge mass that is the createEveryEnemy() method. All the enemies do inherit from the Enemy class (which is what the enemy variable is declared as). Also is there a better way to check which type a particular enemy that is shorter than enemy.class.isAssignableFrom(Ninja.class)? I'd like to ditch the enums entirely if possible, since they seem repetitive when the class name itself holds that information.

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• More Tables or More Databases?

  - by BuckWoody

  I got an e-mail from someone that has an interesting situation. He has 15,000 customers, and he asks if he should have a database for their data per customer. Without a LOT more data it’s impossible to say, of course, but there are some general concepts to keep in mind. Whenever you’re segmenting data, it’s all about boundary choices. You have not only boundaries around how big the data will get, but things like how many objects (tables, stored procedures and so on) that will be involved, if there are any cross-sections of data (do they share location or product information) and – very important – what are the security requirements? From the answer to these types of questions, you now have the choice of making multiple tables in a single database, or using multiple databases. A database carries some overhead – it needs a certain amount of memory for locking and so on. But it has a very clean boundary – everything from objects to security can be kept apart. Having multiple users in the same database is possible as well, using things like a Schema. But keeping 15,000 schemas can be challenging as well. My recommendation in complex situations like this is similar to a post on decisions that I did earlier – I lay out the choices on a spreadsheet in rows, and then my requirements at the top in the columns. I  give each choice a number based on how well it meets each requirement. At the end, the highest number wins. And many times it’s a mix – perhaps this person could segment customers into larger regions or districts or products, in a database. Within that database might be multiple schemas for the customers. Of course, he needs to query across all customers, that becomes another requirement. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• Fixed-Function vs Shaders: Which for beginner?

  - by Rob Hays

  I'm currently going to college for computer science. Although I do plan on utilizing an existing engine at some point to create a small game, my aim right now is towards learning the fundamentals: namely, 3D programming. I've already done some research regarding the choice between DirectX and OpenGL, and the general sentiment that came out of that was that whether you choose OpenGL or DirectX as your training-wheels platform, a lot of the knowledge is transferrable to the other platform. Therefore, since OpenGL is supported by more systems (probably a silly reason to choose what to learn), I decided that I'm going to learn OpenGL first. After I made this decision to learn OpenGL, I did some more research and found out about a dichotomy that I was somewhere unaware of all this time: fixed-function OpenGL vs. modern programmable shader-based OpenGL. At first, I thought it was an obvious choice that I should choose to learn shader-based OpenGL since that's what's most commonly used in the industry today. However, I then stumbled upon the very popular Learning Modern 3D Graphics Programming by Jason L. McKesson, located here: http://www.arcsynthesis.org/gltut/ I read through the introductory bits, and in the "About This Book" section, the author states: "First, much of what is learned with this approach must be inevitably abandoned when the user encounters a graphics problem that must be solved with programmability. Programmability wipes out almost all of the fixed function pipeline, so the knowledge does not easily transfer." yet at the same time also makes the case that fixed-functionality provides an easier, more immediate learning curve for beginners by stating: "It is generally considered easiest to teach neophyte graphics programmers using the fixed function pipeline." Naturally, you can see why I might be conflicted about which paradigm to learn: Do I spend a lot of time learning (and then later unlearning) the ways of fixed-functionality, or do I choose to start out with shaders? My primary concern is that modern programmable shaders somehow require the programmer to already understand the fixed-function pipeline, but I doubt that's the case. TL;DR == As an aspiring game graphics programmer, is it in my best interest to learn 3D programming through fixed-functionality or modern shader-based programming?

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• ASP.NET Session Management

  - by geekrutherford

  Great article (a little old but still relevant) about the inner workings of session management in ASP.NET: Underpinnings of the Session State Management Implementation in ASP.NET.   Using StateServer and the BinaryFormatter serialization occuring caused me quite the headache over the last few days. Curiously, it appears the w3wp.exe process actually consumes more memory when utilizing StateServer and storing somewhat large and complex data types in session.   Users began experiencing Out Of Memory exceptions in the production environment. Looking at the stack trace it related to serialization using the BinaryFormatter. Using remote debugging against our QA server I noted that the code in the application functioned without issue. The exception occured outside the context of the application itself when the request had completed and the web server was trying to serialize session state into the StateServer.   The short term solution is switching back to the InProc method. Thus far this has proven to consume considerably less memory and has caused no issues. Long term the complex object stored in session will be off-loaded into a web service used to access the information directly from the database outside the context of the object used to encapsulate it.

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• Unity throws SynchronizationLockException while debugging

  - by pjohnson

  I've found Unity to be a great resource for writing unit-testable code, and tests targeting it. Sadly, not all those unit tests work perfectly the first time (TDD notwithstanding), and sometimes it's not even immediately apparent why they're failing. So I use Visual Studio's debugger. I then see SynchronizationLockExceptions thrown by Unity calls, when I never did while running the code without debugging. I hit F5 to continue past these distractions, the line that had the exception appears to have completed normally, and I continue on to what I was trying to debug in the first place.In settings where Unity isn't used extensively, this is just one amongst a handful of annoyances in a tool (Visual Studio) that overall makes my work life much, much easier and more enjoyable. But in larger projects, it can be maddening. Finally it bugged me enough where it was worth researching it.Amongst the first and most helpful Google results was, of course, at Stack Overflow. The first couple answers were extensive but seemed a bit more involved than I could pull off at this stage in the product's lifecycle. A bit more digging showed that the Microsoft team knows about this bug but hasn't prioritized it into any released build yet. SO users jaster and alex-g proposed workarounds that relieved my pain--just go to Debug|Exceptions..., find the SynchronizationLockException, and uncheck it. As others warned, this will skip over SynchronizationLockExceptions in your code that you want to catch, but that wasn't a concern for me in this case. Thanks, guys; I've used that dialog before, but it's been so long I'd forgotten about it.Now if I could just do the same for Microsoft.CSharp.RuntimeBinder.RuntimeBinderException... Until then, F5 it is.

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• "Bootmgr is missing...." Upon reboot [closed]

  - by Gabe

  Possible Duplicate: Install/running ubuntu on extarnal HDD with a windows laptop? Ill take you through the steps I did. Sorry if this question has already been resolved, I'm new to Ubuntu and forums in general. I have 2 internal HDDs in my computer, both with Win7. One HDD is my mothers, the other is mine. I did this because she didn't want my games on her computer, and my PCs motherboard took a crap on me, so I set up a dual boot. I also have an external HDD. This is what I am trying to install Ubuntu 12.04 on. I formatted the drive by right clicking it, then selecting "Format". It is now in NTSF format. I downloaded the Windows installer, ran it, and selected "I:/" (my externl hdd) as the install location. The download and installation ran smoothly, and it gave me the reboot prompt. I selected "Reboot now" and my PC rebooted. I was then interrupted by the "Bootmgr is missing. Press CTRL + ALT + DEL TO REBOOT" message. NOTE: I would like to use my HDD for a FULL Ubuntu installation, not the Live (i think thats what its called). I want all my files and settings from Ubuntu saved to the External drive as if it was my only drive. If you need more information just ask. Any help would be appreciated. Thanks in advance.

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• CodePlex Daily Summary for Friday, October 12, 2012

  CodePlex Daily Summary for Friday, October 12, 2012Popular ReleasesHyperCrunch Druid: HyperCrunch Druid 1.0.2102: For all documentation and feedback, visit http://druid.hypercrunch.com.GoogleMap Control: GoogleMap Control 6.1: Some important bug fixes and couple of new features were added. There are no major changes to the sample website. Source code could be downloaded from the Source Code section selecting branch release-6.1. Thus just builds of GoogleMap Control are issued here in this release. NuGet Package GoogleMap Control 6.1 NuGet Package FeaturesBounds property to provide ability to create a map by center and bounds as well; Setting in markup <artem:GoogleMap ID="GoogleMap1" runat="server" MapType="HY...Bundle Transformer - a modular extension for ASP.NET Web Optimization Framework: Bundle Transformer 1.6.5: Version: 1.6.5 Published: 10/12/2012 In the configuration elements css and js added the usePreMinifiedFiles attribute, which enables/disables usage of pre-minified files; Added translator-adapter, which produces translation of TypeScript-code to JS-code; In BundleTransformer.MicrosoftAjax added support of the Microsoft Ajax Minifier 4.69; In BundleTransformer.Yui added support of the YUI Compressor for .NET 2.1.0.0; In BundleTransformer.Csso added support of the CSSO version 1.3.4. ...OrgCharts for SharePoint: OrgChart web part for SharePoint: Key features: • Central License management so no need to remember the license key details when adding to pages. • Builtin-asp.net caching for high performing loading of the Org Chart. • Create Org Chart from SharePoint list data OR SQL server queries. • Multi-level drill through • Use SharePoint lists or SQL Data as datasource • Support node level Images. {Example: Peoples my site photos} • AJAX enabled for fast client side processing • Optionally set the TAB field for an Auto-generated TAB i...mojoPortal: 2.3.9.3: see release notes on mojoportal.com http://www.mojoportal.com/mojoportal-2393-released Note that we have separate deployment packages for .NET 3.5 and .NET 4.0, but we recommend you to use .NET 4, we will probably drop support for .NET 3.5 once .NET 4.5 is available The deployment package downloads on this page are pre-compiled and ready for production deployment, they contain no C# source code and are not intended for use in Visual Studio. To download the source code see getting the lates...OstrivDB: OstrivDB 0.1: - Storage configuration: objects serialization (Xml, Json), storage file compressing, data block size. - Caching for Select queries. - Indexing. - Batch of queries. - No special query language (LINQ used). - Integrated sorting and paging. - Multithreaded data processing.D3 Loot Tracker: 1.5.4: Fixed a bug where the server ip was not logged properly in the stats file.Captcha MVC: Captcha Mvc 2.1.2: v 2.1.2: Fixed problem with serialization. Made all classes from a namespace Jetbrains.Annotaions as the internal. Added autocomplete attribute and autocorrect attribute for captcha input element. Minor changes. v 2.1.1: Fixed problem with serialization. Minor changes. v 2.1: Added support for storing captcha in the session or cookie. See the updated example. Updated example. Minor changes. v 2.0.1: Added support for a partial captcha. Now you can easily customize the layout, s...DotNetNuke® Community Edition CMS: 06.02.04: Major Highlights Fixed issue where the module printing function was only visible to administrators Fixed issue where pane level skinning was being assigned to a default container for any content pane Fixed issue when using password aging and FB / Google authentication Fixed issue that was causing the DateEditControl to not load the assigned value Fixed issue that stopped additional profile properties to be displayed in the member directory after modifying the template Fixed er...Advanced DataGridView with Excel-like auto filter: 1.0.0.0: ?????? ??????Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.69: Fix for issue #18766: build task should not build the output if it's newer than all the input files. Fix for Issue #18764: build taks -res switch not working. update build task to concatenate input source and then minify, rather than minify and then concatenate. include resource string-replacement root name in the assumed globals list. Stop replacing new Date().getTime() with +new Date -- the latter is smaller, but turns out it executes up to 45% slower. add CSS support for single-...WinRT XAML Toolkit: WinRT XAML Toolkit - 1.3.3: WinRT XAML Toolkit based on the Windows 8 RTM SDK. Download the latest source from the SOURCE CODE page. For compiled version use NuGet. You can add it to your project in Visual Studio by going to View/Other Windows/Package Manager Console and entering: PM> Install-Package winrtxamltoolkit Features Attachable Behaviors AwaitableUI extensions Controls Converters Debugging helpers Extension methods Imaging helpers IO helpers VisualTree helpers Samples Recent changes NOTE:...VidCoder: 1.4.4 Beta: Fixed inability to create new presets with "Save As".MCEBuddy 2.x: MCEBuddy 2.3.2: Changelog for 2.3.2 (32bit and 64bit) 1. Added support for generating XBMC XML NFO files for files in the conversion queue (store it along with the source video with source video name.nfo). Right click on the file in queue and select generate XML 2. UI bugifx, start and end trim box locations interchanged 3. Added support for removing commercials from non DVRMS/WTV files (MP4, AVI etc) 4. Now checking for Firewall port status before enabling (might help with some firewall problems) 5. User In...Sandcastle Help File Builder: SHFB v1.9.5.0 with Visual Studio Package: General InformationIMPORTANT: On some systems, the content of the ZIP file is blocked and the installer may fail to run. Before extracting it, right click on the ZIP file, select Properties, and click on the Unblock button if it is present in the lower right corner of the General tab in the properties dialog. This release supports the Sandcastle October 2012 Release (v2.7.1.0). It includes full support for generating, installing, and removing MS Help Viewer files. This new release suppor...ClosedXML - The easy way to OpenXML: ClosedXML 0.68.0: ClosedXML now resolves formulas! Yes it finally happened. If you call cell.Value and it has a formula the library will try to evaluate the formula and give you the result. For example: var wb = new XLWorkbook(); var ws = wb.AddWorksheet("Sheet1"); ws.Cell("A1").SetValue(1).CellBelow().SetValue(1); ws.Cell("B1").SetValue(1).CellBelow().SetValue(1); ws.Cell("C1").FormulaA1 = "\"The total value is: \" & SUM(A1:B2)"; var...Json.NET: Json.NET 4.5 Release 10: New feature - Added Portable build to NuGet package New feature - Added GetValue and TryGetValue with StringComparison to JObject Change - Improved duplicate object reference id error message Fix - Fixed error when comparing empty JObjects Fix - Fixed SecAnnotate warnings Fix - Fixed error when comparing DateTime JValue with a DateTimeOffset JValue Fix - Fixed serializer sometimes not using DateParseHandling setting Fix - Fixed error in JsonWriter.WriteToken when writing a DateT...Readable Passphrase Generator: KeePass Plugin 0.7.2: Changes: Tested against KeePass 2.20.1 Tested under Ubuntu 12.10 (and KeePass 2.20) Added GenerateAsUtf8 method returning the encrypted passphrase as a UTF8 byte array.JSLint for Visual Studio 2010: 1.4.2: 1.4.2patterns & practices: Prism: Prism for .NET 4.5: This is a release does not include any functionality changes over Prism 4.1 Desktop. These assemblies target .NET 4.5. These assemblies also were compiled against updated dependencies: Unity 3.0 and Common Service Locator (Portable Class Library).New ProjectsATM Stimulate Using WCF Service: This project is my homework Basic Events: Basic Events makes it easier for developers to use out of the box events with basic properties in their eventargs like string message and datetime.BCCP-DEX: sumary not avaibleBing Maps TypeScript Declarations: Unofficial TypeScript declarations for the Bing Maps v7 AJAX Control.CodePlex Practice: Testing CodePlexDepIC: Dependency Injection Container with a very simple API.DNN TaskManger: This is the a project build with the DotNetNuke task manager tutorial videos series.Document Importer For SharePoint: Quickly import large volumes of documents into SharePoint document libraries using an effective user interface.Drop Me!!: cOMING SOON...wORKING ON THISGesPro: PFE de fin de BAC MB MLGL2DX (OpenGL to DirectX Wrapper Library): GL2DX is a wrapper library that allows you to build your OpenGL app for WinRT.MoControls - XNA 4 GUI Controls Library: XNA 4 GUI Controls Library aimed to simplify porting of a XNA 4.0 GUI interface to various platforms.Morph implementation in Delphi: Morph Protocol implementation written in Delphi XE3. Morph is a very powerful application level protocol. For more about Morph, go to http://morph.codeplex.com/Musicallis: Projeto da disciplina de Técnicas de Programação Aplicada II da Universidade Presbiteriana Mackenzie - SP.NHook - A debugger API for your hooking projects: A debugger API for your hooking projectsOperation Timber System: This is a Timber system aimed at merchants/wholesalers/Mills. It is only in design phase.Oryon .Net Extension Methods Library: This project contains a lot of useful extension methods for .Net Applications.OstrivDB: OstrivDB is an embedded NoSQL database engine.Outreach02: A research project for website development.PARCIAL-CP-2012: Proyecto De Calidad y Pruebas de Software - Examen ParcialProject13261011: dfdsfProject13271011: 11project-3D-fabien: C# project 3D IN4M12 -->http://www.esiee.fr/~mustafan/IN4M12-13/Pulsar Programming Language: Pulsar, is a free open source programming language alternative to Assembly. Create your dream Operating System without using Assembly, or C#, or C++!Scoot: A rowing club management application.Sfaar Bytex: an hexadecimal file readerSSIS RAW File Viewer: SSIS 2008 RAW file viewer.testddgit1011201201: ttesttom10112012tfs02: fdsf fsd???WindowsPhone???: ???Windows Phone??????www.yidingcan.com?????。??????、??

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• Huge procedurally generated 'wilderness' worlds

  - by The Communist Duck

  I'm sure you all know of games like Dwarf Fortress - massive, procedural generated wilderness and land. Something like this, taken from this very useful article. However, I was wondering how I could apply this to a much larger scale; the scale of Minecraft comes to mind (isn't that something like 8x the size of the Earth's surface?). Pseudo-infinite, I think the best term would be. The article talks about fractal perlin noise. I am no way an expert on it, but I get the general idea (it's some kind of randomly generated noise which is semi-coherent, so not just random pixel values). I could just define regions X by X in size, add some region loading type stuff, and have one bit of noise generating a region. But this would result in just huge amounts of islands. On the other extreme, I don't think I can really generate a supermassive sheet of perlin noise. And it would just be one big island, I think. I am pretty sure Perlin noise, or some noise, would be the answer in some way. I mean, the map is really nice looking. And you could replace the ascii with tiles, and get something very nice looking. Anyone have any ideas? Thanks. :D

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• Cannot execute Java program: UnsupportedClassVersionError

  - by Ricko Devian

  I have installed JDK 6, but I can't execute a Java program. For example, I have made test.java. I compile it with javac tes.java and there's no error when I compile it, but when I want to execute that program it always displays an error. I execute the Java program with java tes. Exception in thread "main" java.lang.UnsupportedClassVersionError: tes : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:634) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) at java.net.URLClassLoader.access$000(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:212) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) Could not find the main class: tes. Program will exit. My javac version is 1.7.0, my java version is 1.6.0. Here is my tes.java code: class tes{ public static void main(String[]args){ System.out.println("hello"); } }

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• Exchange 2010 Deployment Notes - ISA 2004 Server Issue

  - by BWCA

  An interesting ISA 2004 tidbit … While we were setting up our Exchange 2010 ActiveSync environment, we encountered a problem where we could not successfully telnet over port 443 from one of our ISA 2004 Servers to our Exchange 2010 Client Access Server Array. When we tried to telnet over port 443 from the ISA Server to the Client Access Server Array name, we would get a “Could not open connection to the host on port 443: Connect failed” error message. Also, when we used portqry over port 443 from the ISA Server to the Client Access Server Array name, we would get a “Error opening socket: 10065” and “No route to host” error messages. It was odd because we did not have any problems with using ping or tracert from the ISA Server to the Client Access Server Array and our firewall firewall policy was allowing 443 traffic to pass through. After some troubleshooting, we were able to telnet and use portqry over port 443 successfully if we stopped the Microsoft Firewall service on the ISA 2004 Server.  So, it was strictly a problem with ISA.  Eventually, we were able to isolate the problem to a ISA 2004 Server System Policy setting as shown below (to modify the System Policy, right-click Firewall Policy and click Edit System Policy). Under the Diagnostics Services – HTTP Connectivity verifiers Configuration Group, you need to enable the configuration group under the General tab to resolve the problem.  After we enabled the setting, we no longer had a problem.

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• Deleting a row from self-referencing table

  - by Jake Rutherford

  Came across this the other day and thought “this would be a great interview question!” I’d created a table with a self-referencing foreign key. The application was calling a stored procedure I’d created to delete a row which caused but of course…a foreign key exception. You may say “why not just use a the cascade delete option?” Good question, easy answer. With a typical foreign key relationship between different tables which would work. However, even SQL Server cannot do a cascade delete of a row on a table with self-referencing foreign key. So, what do you do?…… In my case I re-wrote the stored procedure to take advantage of recursion:   -- recursively deletes a Foo ALTER PROCEDURE [dbo].[usp_DeleteFoo]      @ID int     ,@Debug bit = 0    AS     SET NOCOUNT ON;     BEGIN TRANSACTION     BEGIN TRY         DECLARE @ChildFoos TABLE         (             ID int         )                 DECLARE @ChildFooID int                        INSERT INTO @ChildFoos         SELECT ID FROM Foo WHERE ParentFooID = @ID                 WHILE EXISTS (SELECT ID FROM @ChildFoos)         BEGIN             SELECT TOP 1                 @ChildFooID = ID             FROM                 @ChildFoos                             DELETE FROM @ChildFoos WHERE ID = @ChildFooID                         EXEC usp_DeleteFoo @ChildFooID         END                                    DELETE FROM dbo.[Foo]         WHERE [ID] = @ID                 IF @Debug = 1 PRINT 'DEBUG:usp_DeleteFoo, deleted - ID: ' + CONVERT(VARCHAR, @ID)         COMMIT TRANSACTION     END TRY     BEGIN CATCH         ROLLBACK TRANSACTION         DECLARE @ErrorMessage VARCHAR(4000), @ErrorSeverity INT, @ErrorState INT         SELECT @ErrorMessage = ERROR_MESSAGE(), @ErrorSeverity = ERROR_SEVERITY(), @ErrorState = ERROR_STATE()         IF @ErrorState <= 0 SET @ErrorState = 1         INSERT INTO ErrorLog(ErrorNumber,ErrorSeverity,ErrorState,ErrorProcedure,ErrorLine,ErrorMessage)         VALUES(ERROR_NUMBER(), @ErrorSeverity, @ErrorState, ERROR_PROCEDURE(), ERROR_LINE(), @ErrorMessage)         RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState)     END CATCH   This procedure will first determine any rows which have the row we wish to delete as it’s parent. It then simply iterates each child row calling the procedure recursively in order to delete all ancestors before eventually deleting the row we wish to delete.

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• Finding links among many written and spoken thoughts

  - by Peter Fren

  So... I am using a digital voice recorder to record anything I see important, ranging from business to private, from rants to new business ideas. Every finalized idea is one wma-file. I wrote a program to sort the wma-files into folders. From time to time I listen to the wma-files, convert them to text(manually) and insert them into a mindmap with mindmanager, which I sort hierarchically by area and type in turn. This works very well, no idea is being lost, when I am out of ideas for a special topic, I listen to what I said and can get started again. What could a search system look like that finds links between thoughts(written in the mindmap and in the wma files) or in general gives me good search results even when the keyword I searched for is not present but a synonym of it or related topic(for instance flower should output entries containing orchid aswell, even if they contain orchid but not the very keyword flower). I prefer something ready-made but small adjustments to a given system are fine aswell. How would you approach this task?

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• OOP oriented PHP app source code samples and advice

  - by abel

  The day I have been dreading has arrived. I never felt OOP or good software design was important(I knew they were important, but I thought I could manage without them.). However having read otherwise almost everywhere on the interwebs, I started dreading the day when my client would ask me for new features in an existing app. The day has come and the pain is unbearable! I have never coded my PHP websites "properly"(PHP is my primary language and the bulk of my work. I am learning Python (using web2py)) I take care that the website doesn't fall apart in a daily use scenario. I code pages like I was creating a list of static html files with bits of "magic code" in each of them(this bugs me a lot). How do I make the whole app more or less a single object? For eg. How do I design the object model for an invoicing app? I use a lot of functions for doing any particular thing in the same fashion throughout the app(for eg. validation, generating ids, calculating taxes etc.). I know the basics of OOP in general. Can anyone point me to source code samples of functional apps written in php? Or can someone provide pointers so I can recode my existing apps in a more modular way.

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• Installing both lxml 3.1.2 and lxml2 on ubuntu 12.04

  - by wgw

  I asked this on SO: http://stackoverflow.com/questions/19852911/lxml-3-1-2-and-lxml2-both-on-ubuntu/19856674#19856674 But it is perhaps more appropriate for AskUbuntu. So here it is again, reformulated. On the lxml site they suggest that it is possible to have both lxml2 and the newest version of lxml on ubuntu: Using lxml with python-libxml2 If you want to use lxml together with the official libxml2 Python bindings (maybe because one of your dependencies uses it), you must build lxml statically. Otherwise, the two packages will interfere in places where the libxml2 library requires global configuration, which can have any kind of effect from disappearing functionality to crashes in either of the two. To get a static build, either pass the --static-deps option to the setup.py script, or run pip with the STATIC_DEPS or STATICBUILD environment variable set to true, i.e. STATIC_DEPS=true pip install lxml The STATICBUILD environment variable is handled equivalently to the STATIC_DEPS variable, but is used by some other extension packages, too. I am generally confused about how pip packages and ubuntu packages get along, so I hesitate to run STATIC_DEPS=true pip install lxml. Will it damage/confuse my installed lxml2 package? The suggestion on SO was to install the new lxml in a virtualenv. That looks like the best way to go, but the lxml site is suggesting that a dual installation will work also. In general: what happens if I use pip (to get a newer install) for a package that is already installed by apt-get?

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• WebLogic 12c and Mobile Platform sales kits

  - by JuergenKress

  At our WebLogic Community Workspace (WebLogic Community membership required) you can find the latest sales plays to update your sales team. Kits include a overview presentation to train your sales teams, cheat sheets for your pocket and customer ppt presentations: WebLogic 12c FY15 sales resources FY15 CAF Sales Opportunities Webcast - PPT WebLogic Platform-as-a-Service | Customer Presentation Cheat Sheet WebLogic Coherence Best for Oracle Database - Customer Presentation | Cheat Sheet Capture New Java Projects - Customer Presentation | Cheat Sheet Upsell EM for WebLogic - Customer Presentation | Cheat Sheet WebLogic for ODA - Customer Presentation | Cheat Sheet Mobile Platform 12c FY15 sales resources FY15 Oracle Mobile Platform Sales Opportunities Webcast -| PPT Oracle Mobile Strategy (CVC Deck) - Customer Presentation Develop New Mobile Apps - Customer Presentation | Cheat Sheet Mobilize Enterprise Apps - Customer Presentation | Cheat Sheet Mobile Security - Customer Presentation | Cheat Sheet Download: FY15 Mobile Sales Play Content - ZIP (61Mb) Please use these documents in the spirit of our joint partnership. Please do NOT publish any WebLogic 121.3 and the Mobile Platform details before general availability. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress,sales,sales plays,sales kit

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• What's so bad about pointers in C++?

  - by Martin Beckett

  To continue the discussion in Why are pointers not recommended when coding with C++ Suppose you have a class that encapsulates objects which need some initialisation to be valid - like a network socket. // Blah manages some data and transmits it over a socket class socket; // forward declaration, so nice weak linkage. class blah { ... stuff TcpSocket *socket; } ~blah { // TcpSocket dtor handles disconnect delete socket; // or better, wrap it in a smart pointer } The ctor ensures that socket is marked NULL, then later in the code when I have the information to initialise the object. // initialising blah if ( !socket ) { // I know socket hasn't been created/connected // create it in a known initialised state and handle any errors // RAII is a good thing ! socket = new TcpSocket(ip,port); } // and when i actually need to use it if (socket) { // if socket exists then it must be connected and valid } This seems better than having the socket on the stack, having it created in some 'pending' state at program start and then having to continually check some isOK() or isConnected() function before every use. Additionally if TcpSocket ctor throws an exception it's a lot easier to handle at the point a Tcp connection is made rather than at program start. Obviously the socket is just an example, but I'm having a hard time thinking of when an encapsulated object with any sort of internal state shouldn't be created and initialised with new.

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• How to use Pixel Bender (pbj) in ActionScript3 on large Vectors to make fast calculations?

  - by Arthur Wulf White

  Remember my old question: 2d game view camera zoom, rotation & offset using 'Filter' / 'Shader' processing? I figured I could use a Pixel Bender Shader to do the computation for any large group of elements in a game to save on processing time. At least it's a theory worth checking. I also read this question: Pass large array to pixel shader Which I'm guessing is about accomplishing the same thing in a different language. I read this tutorial: http://unitzeroone.com/blog/2009/03/18/flash-10-massive-amounts-of-3d-particles-with-alchemy-source-included/ I am attempting to do some tests. Here is some of the code: private const SIZE : int = Math.pow(10, 5); private var testVectorNum : Vector.<Number>; private function testShader():void { shader.data.ab.value = [1.0, 8.0]; shader.data.src.input = testVectorNum; shader.data.src.width = SIZE/400; shader.data.src.height = 100; shaderJob = new ShaderJob(shader, testVectorNum, SIZE / 4, 1); var time : int = getTimer(), i : int = 0; shaderJob.start(true); trace("TEST1 : ", getTimer() - time); } The problem is that I keep getting a error saying: [Fault] exception, information=Error: Error #1000: The system is out of memory. Update: I managed to partially workaround the problem by converting the vector into bitmapData: (Using this technique I still get a speed boost of 3x using Pixel Bender) private function testShader():void { shader.data.ab.value = [1.0, 8.0]; var time : int = getTimer(), i : int = 0; testBitmapData.setVector(testBitmapData.rect, testVectorInt); shader.data.src.input = testBitmapData; shaderJob = new ShaderJob(shader, testBitmapData); shaderJob.start(true); testVectorInt = testBitmapData.getVector(testBitmapData.rect); trace("TEST1 : ", getTimer() - time); }

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• Is .Net Going to Die As far as Server Apps and Desktop Apps are concerned? [closed]

  - by Graviton

  Possible Duplicate: What does Windows 8 mean for the future of .NET? The Windows 8 preview doesn't mention .Net, and the demo seems to showcase what HTML, CSS and Javascript can do on Windows 8 OS. The impression I get from watching it is that HTML , Javascript is going to figure prominently in Windows 8, even for the traditional windows desktop applications. That, couple with the fact that there is no mentioning of .Net 5 and Visual Studio 2012 or 2013( MS is pretty quick to announce the next generation VS tools) yet, makes me worry that sooner or later, Microsoft will abandon the .Net platform completely. Yes, not just abandoning Silverlight, but the .Net platform in general. Which means that all the desktop apps, server apps you wrote in .Net is going to be obsolete, much like how VB6 apps are now obsolete. Is .Net going to die? Of course you won't find that all .Net apps stop running tomorrow. But will there be a day-- even when at that time Microsoft is alive and kicking-- when .Net apps are looked upon as legacy apps in the way we perceive VB6 apps? Edit: I've changed the wording of the title, so it's not a dupe of existing question. Please take note.

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• What You Said: Where Do You Find Your Next Game?

  - by Jason Fitzpatrick

  Earlier this week we asked you to share your favorite places and tricks for finding new video games to play. It turns out the least of your problems was finding new games! From the comments it became apparent How-To Geek readers had absolutely no problem finding new games to add to their gaming stable. Buzz writes: I have quite an elaborate procedure in finding my next game:For free games i simply follow the feeds on a few websites like Freegamer, LinuxGames, HappyPenguin and Penguspy. Every now and them i browse Wikipedia articles on free/FOSS games. For commercial games the procedure depends on what i enjoyed the most in that game:- If i enjoyed the story or the general feel: i usually start with a game i like and look for sequels, prequels, mods or spinoffs. I even go out on a limb and give other platforms (than a PC) a try, even if it usually means emulation. If you really enjoy a game series/saga it’s usually worth the effort.- If i enjoy the producer/gaming company then i seek out more of their games.- If i enjoy the technical achievements that went into making the game or if i am concerned for the system requirements of my gear i try to play games that are built on the same engine(s) as one of the games i ran smooth and enjoyed.- If i feel like playing a particular genre i usually start with a title i enjoyed and look for alternatives or similar games- You can always try searching for Game of The Year winners for a particular time period or other similar accomplishments. They usually yield great results. How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me?

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• Bright Minds in Singapore: Oracle Graduate Hiring

  - by user769227

   Last week I was in Singapore and had the opportunity to take part in our graduate interviewing that we are currently undertaking as part of our ASEAN hiring. I always feel fortunate to get the chance to meet and talk with students in the APAC region and taking time to meet some of the students we interviewed in Singapore last week is no exception. The excitement and enthusiasm of many of the students that I spoke to last week really stands out but what really brought some of them to the forefront for me was their creative ways of thinking and the level of professionalism that I saw in the students. Some of the presentation and communication skills that I saw displayed would rival experienced IT Consultants in the industry.  We still have more interviews to follow up from last week, but I am confident that of the students we had the chance to meet last week some of them will go on to have bright and successful careers here at Oracle.  To all the students that came in and spent the day with us, I want to thank you for giving us your time and for sharing your thoughts and ideas with us. From a business perspective I think you all will go on and do great things and from a personal stand point I enjoyed many of the conversations I had and feel lucky to meet with you. Best of luck with the remainder of your interviews and I hope to see some of you in the halls on my next visit to Singapore.

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• Local file system not properly unmounted during shutdown

  - by bernhard

  I have a file system with two HDDs and several partitions mounted separately locally. /root, /home, /usr, /var, /local/share , /home/bernhard/fotos/bilder, /backup are on separate partitions and are all ext3. During unmounting the message "unmounting local file system" does not appear any further and when booting all partitions but the root partition have to reload the journal, which indicates improper unmounting. The root partition and /usr are on sda, the others on sdb or further usb-mounted devices. the only partition unmounted w/o problem seems to be the root partition on sda4. I wonder whether the script to umount all devices has a "wait for success" loop or that the script itself got corrupted. However, yesterday I upgraded to 11.04 and the error persists. pmount does not look to be appropriate since the device are not hotplugged but simply mounted during system start. Obviously mounting /usr and afterwards /usr/local/share as well as /home and later /home/bernhard/fotos/bilder presents problems for umount; the devices may be busy und thus not properly unmounted. Does anybody have an idea for a script to organize unmounting in an ordered way? How to wait for unmounting of the secondary mount? Do you know as well where to place such a script that it will be used instead of the original umount command? Could be a general solution.

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