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  • Application trying to use the wrong shared library

    - by Josh
    I'm having a problem with a program (quartus) running on my ubuntu machine. I'm getting the following error. quartus: symbol lookup error: /usr/lib/i386-linux-gnu/libXi.so: undefined symbol: XESetWireToEventCookie I have the correct libXi.so.6.0.0 file but no matter where I put it, the OS won't use it unless I apt-get remove libxi-dev, but a lot of software uses this libXi. What I want to do is add some sort of exception to the dynamic linker so that quartus uses the libXi.so that it needs and everything else still uses the one in /usr/lib/i386-linux-gnu. Thanks!

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  • How to write this kind of java source in clojure. [closed]

    - by tikky
    I want to know how to write a clojure code by looking at a java code like this. import xxxxxx import com.vaadin.terminal.gwt.server.AbstractApplicationServlet; public class Clojure4Vaadin extends AbstractApplicationServlet { @Override protected Class <? extends Application > getApplicationClass() throws ClassNotFoundException { return Application.class; } @Override protected Application getNewApplication(HttpServletRequest request) throws ServletException { try { RT.load(getServletConfig().getInitParameter("script-name"), true); //run Lisp function return (Application)RT.var(getServletConfig().getInitParameter("package-name"),getServletConfig().getInitParameter("function-name")).invoke(new String[0]); } catch (Exception e) { throw new ServletException(e); } } } I need to write a code clojure code which can do the sane thing that this java code can do.

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  • Why C# is not statically typed but F# and Haskell are?

    - by ??????? ???????
    There was a talk given by Brian Hurt about advantages and disadvantages of static typing. Brian said that by static typing he don't mean C#, but F# and Haskell. Is it because of dynamic keyword added to C#-4.0? But this feature is relatively rarely useful. By the way, there are ? and unsafeCoerse in Haskell which obviously are not the same, but something that could blown your head off in runtime similarly like exception thrown as a result of dynamic. Finally, why F# and Haskell could be named a statically typed languages and C# couldn't?

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  • Microsoft XNA code sample wont work with blender model

    - by FreakinaBox
    I downloaded this code sample and integrated it into my game http://xbox.create.msdn.com/en-US/education/catalog/sample/mesh_instancing It works with the model that they supplied, but throws and exception whenever I use one of my models. The current vertex declaration does not include all the elements required by the current vertex shader. TextureCoordinate0 is missing. I tried pluging my model into their original source code and same thing. My model is an fbx from blender and has a texture. This is the function that throws the error GraphicsDevice.DrawInstancedPrimitives( PrimitiveType.TriangleList, 0, 0, meshPart.NumVertices, meshPart.StartIndex, meshPart.PrimitiveCount, instances.Length );

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  • New Development Snapshot

    I got a little side tracked by the investigation of the Google Collections test suite performance issue, reported by Albert Strasheim in the comments to the previous snapshot. This caused me to do some work on exception handling (unfortunately without any performance benefit to the Google Collections test suite) which, in turn, triggered something I've been wanting to do for while, namely to introduce a stub version of IKVM.OpenJDK.Core.dll which can...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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  • Top Down bounds of vision

    - by Rorrik
    Obviously in a first person view point the player sees only what's in front of them (with the exception of radars and rearview mirrors, etc). My game has a top down perspective, but I still want to limit what the character sees based on their facing. I've already worked out having objects obstruct vision, but there are two other factors that I worry would be disorienting and want to do right. I want the player to have reduced peripheral vision and very little view behind them. The assumption is he can turn his head and so see fairly well out to the sides, but hardly at all behind without turning the whole body. How do I make it clear you are not seeing behind you? I want the map to turn so the player is always facing up. Part of the game is to experience kind of a maze and the player should be able to lose track of North. How can I turn the map rather than the player avatar without causing confusion?

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  • How to ensure that a member variable is initialized before calling a class method

    - by Omkar Ekbote
    There's a class with a parametrized constructor that initializes a member variable. All public methods of the class then use this member variable to do something. I want to ensure that the caller always creates an object using the parametrized constructor (there is also a setter for this member variable) and then call that object's methods. In essence, it should be impossible for the caller to call any method without setting a value to the member variable (either by using the parametrized constructor or the setter). Currently, a caller can simply make an object using the default constructor and then call that object's method - I want to avoid checking whether or not the member variable is set in each and every one of the 20-odd methods of the class (and throw an exception if it is not). Though a runtime solution is acceptable (better than the one I mentioned above); a compile-time solution is preferable so that any developer will not be allowed to make that mistake and then waste hours debuggging it!

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  • Choosing a new programming language to learn [on hold]

    - by Xelom
    I'm a Microsoft Stack(ASP.NET, C#) developer. Mainly, I develop server side software, windows services, restful apis etc. My client side interaction is really really low. So aside from C# I want to learn a new language. Time is precious and I want to give my focus to a language which have a future. My language list is: Scala (Powerful usage in Twitter) Go (Getting popular and channels are pretty awesome) Erlang (Stable server side programs. Used at Whatsapp) You can give advice for the above or you can give me a better option. My only exception is Objective-C. I don't want to get in that one. Thanks

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  • Kernel Panic while Installing Ubuntu 12.10 from USB Drive

    - by user100889
    Good evening, I recently looked into installing Ubuntu alongside my Windows. I was able to mount the iso on a USB drive using Universal USB Installer. I verified it with the MD5sum utility and the hash is correct. When installing, I can get to the screen where I choose the boot order, select the USB drive, and then I get to a screen where Ubuntu seems to be 'loading' (purple background with Ubuntu logo and name in the middle). Then, all of a sudden, I get a "Kernel Panic - Not syncing: fatal exception in interrupt" error message. My specs : Intel Core 2 Duo CPU T5850 @ 2.16 GHz / 4 GB of ram / Packard Bell computer from 2007. / Windows 7 Ultimate x64 installed. What should I do now ? Thanks for your help.

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  • Android game scrolling background

    - by Stevanicus
    Hi There, I'm just trying to figure out the best approach for running a scolling background on an android device. The method I have so far.... its pretty laggy. I use threads, which I believe is not the best bet for android platforms @Override public void run() { // Game Loop while(runningThread){ //Scroll background down bgY += 1; try { this.postInvalidate(); t.sleep(10); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } where postinvalidate in the onDraw function simply pushings the background image down canvas.drawBitmap(backgroundImage, bgX, bgY, null); Thanks in advance

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  • L'App Store génère toujours quatre fois plus de revenus que Google Play, mais la galerie d'Android augmente rapidement son CA

    L'App Store génère toujours quatre fois plus de revenus que Google Play Mais la galerie de Google augmente rapidement son chiffre d'affaires d'après App Annie Les études sur les galeries applicatives se suivent et se ressemblent toutes un peu. L'Index de App Annie ne fait pas exception. En résumé, d'après cette analyse, Google Play est en très forte croissance? mais reste beaucoup moins rentable que l'App Store d'Apple. En octobre, le chiffre d'affaires (CA) de la galerie de Google a certes triplé (+ 313 %) par rapport à janvier quand celle des iDevices ne progressait « que » de 12.9 %. Mais au final c'est bien un Apple qui qui génèrerait le plus de revenus a...

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  • Getting "server certificate verification failed" during apt-get update

    - by mydoghasworms
    I am trying to update a system using an HTTPS package mirror located here: https://mirror.ufs.ac.za/os/linux/distros/ubuntu/ubuntu/ However, during apt-get update, I get the following message: Packages server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none If you visit the site in your browser, you are warned about the site's certificate, but I trust the site, so it's not an issue for me. I assume I must be able to add this exception somewhere for apt to proceed. Can you tell me where and how?

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  • Missing error handling in Streaming-AJAX-Proxy Log

    - by Michael Freidgeim
    We are using AjaxProxy(FROM http://www.codeproject.com/KB/ajax/ajaxproxy.aspx) on our web site, but started to notice errors accessing log.txt file. I found that the file is created by Log class and doesn't have ability to switch it off and error handling. I've added reading file name from configuration and try/catch block   public static class Log     {         private static StreamWriter logStream;         private static object lockObject = new object ();     public static void WriteLine(string msg)         {                       string logFileName = ConfigurationExtensions.GetAppSetting("AjaxStreamingProxy.LogFile" ,"");                       if (logFileName.IsNullOrEmpty())                             return;                       try                      {                             if (logStream == null )                            {                                    lock (lockObject)                                   {                                           if (logStream == null )                                          {                            logStream = File.AppendText(Path .Combine(AppDomain.CurrentDomain.BaseDirectory, logFileName));                                          }                                   }                            }                            logStream.WriteLine(msg);                      }                       catch (Exception exc)                      {                             string ignoredMsg = String .Format("The error occured while logging {0}, but processing will continue.\n {1} ", exc);                             LoggerHelper.LogEvent(ignoredMsg, MyCategorySource, TraceEventType .Warning, true);                      }         }

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  • What are you using the debugger for? [closed]

    - by Peter Gfader
    Some scenarios that I can think of: Reading/Understanding code Understanding the flow (what happens when) Stop program and see where it is up to a. Attach debugger b. Exception -- Debug Discover API Run to breakpoint and verify state The question got closed on SO, so I ask here... http://stackoverflow.com/questions/6462461/what-do-you-use-the-debugger-for What are you using the debugger for? Which scenario did you ran into, that you needed the debugger? Could you have done it differently?

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  • Is this a violation of the Liskov Substitution Principle?

    - by Paul T Davies
    Say we have a list of Task entities, and a ProjectTask sub type. Tasks can be closed at any time, except ProjectTasks which cannot be closed once they have a status of Started. The UI should ensure the option to close a started ProjectTask is never available, but some safeguards are present in the domain: public class Task { public Status Status { get; set; } public virtual void Close() { Status = Status.Closed; } } public ProjectTask : Task { public override void Close() { if (Status == Status.Started) throw new Exception("Cannot close a started Project Task"); base.Close(); } } Now when calling Close() on a Task, there is a chance the call will fail if it is a ProjectTask with the started status, when it wouldn't if it was a base Task. But this is the business requirements. It should fail. Can this be regarded as a violation?

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  • Printing Tip Handling User Initiated Dialogs Exceptions

    I see this question every so often so it makes sense to share it through a quick post. When using the print API in Silverlight 4 you can run into the dreaded exception: System.Security.SecurityException: Dialogs must be user-initiated Then you examine your code and confirm that your code where you invoke the PrintDocuments Print method are indeed being handled by a user-initiated event. If you are not invoking Print in a user-initiated event then your know your solution :) Here is some sample...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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  • Taking too long to get skills for entry level programmer position [closed]

    - by greenonion
    I don't have the skills for an entry level position as a .Net programmer. I am trying to learn what I need but there is too much to learn and too little time. What can I do? About two months ago, I went to a job interview for an entry level C# .Net programming/consultant position in NYC. When I heard back from them, they told me that the knowledge gap between what I knew and what they needed me to know was too big and I might have been a better fit if I had 6 months of experience. This was the first interview that I went on since graduating college. before the interview, I read a book on visual C#. Turns out it wasn't a very good book and I was missing a lot of key areas of knowledge such as ADO.net SQL (I had learned some LINQ) A little bit about how memory is handled Multiple threaded programming, etc. Because the book wasn't very good, the stuff I did know, I didn't know very well. I felt crushed. I've applied for jobs to gain experience but when recruiters hear that I have no experience they lose interest. I figured that I can at least work on my knowledge. Since then, I read "SQL Essentials" to cover the SQL bit and I found a pretty awesome book that is good enough to clear up what's hazy in my mind and covers almost all of the extra topics. The book is "C# 4.0: The Complete Reference" by Herbert Schildt. I'm even learning a lot about the topics I was familiar with. For a month now I've been working my way through this beast of a book. However, gaining the knowledge I need is taking too long. I can't hold off not having a full-time job much longer. I'm not stupid and I'm studying constantly pouring through the book, asking questions on stackoverflow, referencing the C# specification, etc. I have made great progress but there is just too much ground to cover. I'm on chapter 12 which is about a 3rd through the book. To get an idea of what I know vs don't know, the table of contents is on amazon: http://www.amazon.com/C-4-0-The-Complete-Reference/dp/007174116X How on earth can someone know enough to function as a programmer in the real world? Can I try for a job in academia? Will I have time to finish learning the rest of the C# language or am I just un-hireable?

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  • How are software projects 'typically' managed/deployed

    - by rguilbault
    My company is evaluating adopting off-the-shelf ALM products to aid in our development lifecycle; we currently use our own homegrown solutions to manage requirements gathering, specification documentation, testing, etc. One of the issues I am having is that we have what we call a pipeline, which consists of particular stops: [Source] - [QC] - [Production] At the first stop, the developer works out a solution to some requested change and performs individual testing. When that process is complete (and peer review has been performed), our ALM system physically moves the affected programs from the [Source] runtime environment to the [QC] runtime environment. You can think of this as analogous to moving some web pages from the 'test' server to the 'live' server, where QC personnel can bang on the system and complain that the developer has it all wrong ;-) Once QC signs off that the changes are working, the system again moves the code along to the next stage, where additional testing is performed, etc. I have been searching the internet for a few days trying to find how the process is accomplished anywhere else -- I have read a bit about builds, automated testing, various ALM products, etc. but nowhere does any of this state how builds interact with initial change requests, what the triggers are, how dependencies are managed, how the various forms of testing are accommodated (e.g. unit testing, integration testing, regression testing), etc. Can anyone point me to any resources or attempt to explain (generically) how a change could/should be tracked and moved though the development lifecycle? I'd be very appreciative. To keep things consistent, let's say that we have a project called Calculator, which we want to add support for the basic trigonometric functions: sine, cosine and tangent. I'm open to reorganizing the company however we need to in order to accomplish due diligence testing and we can suppose that any tools are available for use (if that helps to illustrate the process). To start things off, I think I understand this much: we document the requirements, e.g.: support sine, cosine and tangent functions we create some type of change request/work order to assign to programming coding takes place, commits are made to version control peer review commences programmer marks the work order as completed? ... now what? How does QC do their thing? Would they perform testing before closing the 'work order'?

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  • SMTP mailbox unavailable - intermittent and self-inflicted

    - by user134451
    I have an app that runs daily, sending confirmation emails to dozens of customers. Emails are sent using SMTP with authentication. The app also has some error handling, and occasionally anonymous SMTP is used to notify the webmaster that an e-mail issue has been encountered (a malformed email address, usually). Whenever these warning notifications are sent, the customer notifications that follow throw an error: "Mailbox unavailable. The server response was: 5.7.1 Unable to relay". The customer notification emails are sent, but my app drops into the exception handler. And all subsequent customer notification emails have this problem. Everything is fine next time the programs run, until a webmaster warning email is sent. Anyone have an ideas what would cause this? My first thought was that the client didn't like being switched back and forth between anonymous to authenticated modes. I created a separate client for each mode, but that didn't help.

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  • Can not export JARS in lwjgl!

    - by NerdyLegend
    I did it before but for some reason it's doing the stupid problem again. I want to export as a regular Jar file, not a folder full of files. I export it like in Oskar Veerhoak. cmd says Exception in thread "main" java.lang.RuntimeException: Resource not found: res/F lubberFlap.png at org.newdawn.slick.util.ResourceLoader.getResourceAsStream(ResourceLoa der.java:69) at com_FlubberSpace.MainFS.main(MainFS.java:118) I tested it out with my other project with the same code pretty much. This is how I load my Textures wood = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("res/wood.png")); of course it works fine in eclipse but not after export. I havn't tried giving the previous game its' own project, I have it in a package. Can someone record how to export properly? I want a jar file that you just double click to start it. I also want it so nobody can extract the files and see my classes and res.

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  • Authentication error when trying to upgrade from 11.10 to 12.04

    - by mahmuodmasri
    I wrote : ~$ do-release-upgrade and the system says: Checking for a new ubuntu release Get:1 Upgrade tool signature [198 B] Get:2 Upgrade tool [1551 kB] Fetched 1551 kB in 6s (167 kB/s) extracting 'precise.tar.gz' authenticate 'precise.tar.gz' against 'precise.tar.gz.gpg' exception from gpg: GnuPG exited non-zero, with code 2 Debug information: gpg: Signature made Thu 11 Oct 2012 07:47:10 AM EET using DSA key ID 437D05B5 gpg: can't open `/etc/apt/trusted.gpg' gpg: keydb_search failed: file open error gpg: Can't check signature: public key not found Authentication failed Authenticating the upgrade failed. There may be a problem with the network or with the server. Please help me!

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  • Would you see any use of a Trilean (True, False, ??)

    - by Sybiam
    I don't know if I'm alone but sometimes I have a function that should return true or false. But in some case there would be a third result that would make more sense. In some language theses cases would be handled with integers or with exception. For exemple you want to handle the age of a user if he is over 18 years old. And you have a function like this. if(user.isAdult(country_code)){ //Go On }else{ // Block access or do nothing } But in some case depending how your app is built I could see case where the birthday field is incomplete. Then this function should return something undetermined. switch(user.isAdult()){ case true: // go on break; case undetermined: //Inform user birthday is incomplete case false: //Block access } As i said we can handle that with Exceptions and Int, but I would find it quite sexy to have a true, false, undetermined embeded in the language instead of using some home defined constants.

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  • Why I am getting following error when trying to start SDK manager?

    - by rishiag
    I have a 64 bit- 20 GB Ubuntu partition which has very less usable space. So I have put Eclipse in my Ubuntu and downloaded sdks to a folder in my another partition. So when I try to start sdk manager, I am getting the following error in my console: Unexpected exception 'Cannot run program "/media/Data/android-sdks/platform-tools/adb": error=13, Permission denied' while attempting to get adb version from '/media/Data/android-sdks/platform-tools/adb' I have run chmod recursively on android-sdks directory. If I change the address for sdks to Ubuntu partition, sdk manager starts successfully. Is there anything I can do other than increasing the partition size? Thanks

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  • What should I do when Ubuntu freezes?

    - by ændrük
    All operating systems freeze sometimes, and Ubuntu is no exception. What should I do to regain control when... just one program stops responding? nothing at all responds to mouse clicks or key presses? the mouse stops moving entirely? In what order should I try various solutions before deciding to pull the power plug? What should I do when starting up Ubuntu fails? Is there a diagnostic procedure I can follow?

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  • C# 5 - asynch method callback with Task.ContinueWIth? [migrated]

    - by user1142433
    I have a method that pulls some HTML via the HttpClient like so: public static HttpClient web = new HttpClient(); public static async Task<string> GetHTMLDataAsync(string url) { string responseBodyAsText = ""; try { HttpResponseMessage response = await web.GetAsync(url); response.EnsureSuccessStatusCode(); responseBodyAsText = await response.Content.ReadAsStringAsync(); } catch (Exception e) { // Error handling } return responseBodyAsText; } I have another method that looks like so: private void HtmlReadComplete(string data) { // do something with the data } I would like to be able to call GetHTMLDataAsync and then have it call HtmlReadComplete on the UI thread when the html has been read. I naively thought this could somehow be done with something that looks like GetHTMLDataAsync(url).ContinueWith(HtmlReadComplete); But, I can't get the syntax correct, nor am I even sure that's the appropriate way to handle it. Thanks in advance!

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