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• Getting "System program problem detected" pops up regularly after upgrade from 11.10 to 12.04

  - by Mixhael

  This started to happen immediately after I had rebooted the first time after doing a system upgrade to 12.04 from 11.10. It first starts with a dialogue that says "System program problem detected". Then when I try to hit 'report problem' not much happens. I am led through a dialogue that always ends up the problem cannot be solved. I am running a MacBook1,1 I am aware this is not a lot of information, however I'm not sure which information I need to publish and how should I obtain it to debug this problem. Here's a screenshot!

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• Programming cookbook? [closed]

  - by user73669

  Possible Duplicate: What is the single most influential book every programmer should read? Hello With sites like The Daily WTF and recurring threads on Slashdot and elsewhere about bad programming, I figured that, to avoid people reinventing the wheel (badly or not), there should be a good, fat book on programming that would go through typical programming problems and show good, known algorithms, either in pseudo-code or some language with an easy syntax so that the language is not an issue. Here's the list of books on the subject I saw at my local computer bookstore. Can you recommend a couple, or add to this list if it's missing better options? The art of computer programming Code complete Masterminds of programming 97 things every programmer should know The passionate programmer Pragmatic thinking & learning Coders at work The algorithm design manual Algorithms and programming How to think about algorithms How to think like a programmer Why programs fail Beautiful data Beautiful code The productive programmer Solid code Write great code Clean code Programming language pragmatics Hello world Learning Processing Learn to program Thank you.

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• Programming a trading strategy

  - by Rob

  Excuse me if I'm not descriptive enough, as I do not have much of a background when it comes to these things: How would I go about coding a primitive trading strategy and link it to some sort of artificial trading environment? Where do I start, and what are some other essential questions I should be asking? I am interested more in doing this because it interests me than making returns. Ideally it utilizes random/historical market data and doesn't actually execute any real trades. My background: I'm almost done my undergrad degree in computer science, and have had intro finance and economic courses. Familiar mostly with C and Java.

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• Why does Windows 7 have three system partitions?

  - by Ben

  I am using Windows 7, and I wanted to make a System image (using Windows 7), but Windows 7 checked three partitions as System (100 MB + C (install partition) + D (my partition for my files, all programs are installed at C)). I don't want to backup my D partition, but that is not really the point. I don't want Windows messing with my other partitions and making them system. Is there a way to limit Windows 7 just to partition C (install partition)? If there is no way to stop Windows from making other partitions system, can I at least delete the files that make partition D system? PS: All these three partitions are on one physical disk, partitions from other disks aren't treated as System. FACTS: desktop PC, no OEM partitions, I personally have installed Windows 7 (many times) on the C partition. Why is my D partition checked as System partition when I try to create a System Image (using Windows 7 Ultimate built in tool), even though Windows (and all the software) are installed on the C partition? Is there a way to make D "normal" or non-system partition? Here is a picture of how it looks like if I try to create a system image. Once again, why is D also a system partition?

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• Box2D Joints in entity components system

  - by Johnmph

  I search a way to have Box2D joints in an entity component system, here is what i found : 1) Having the joints in Box2D/Body component as parameters, we have a joint array with an ID by joint and having in the other body component the same joint ID, like in this example : Entity1 - Box2D/Body component { Body => (body parameters), Joints => { Joint1 => (joint parameters), others joints... } } // Joint ID = Joint1 Entity2 - Box2D/Body component { Body => (body parameters), Joints => { Joint1 => (joint parameters), others joints... } } // Same joint ID than in Entity1 There are 3 problems with this solution : The first problem is the implementation of this solution, we must manage the joints ID to create joints and to know between which bodies they are connected. The second problem is the parameters of joint, where are they got ? on the Entity1 or Entity2 ? If they are the same parameters for the joint, there is no problem but if they are differents ? The third problem is that we can't limit number of bodies to 2 by joint (which is mandatory), a joint can only link 2 bodies, in this solution, nothing prevents to create more than 2 entities with for each a body component with the same joint ID, in this case, how we know the 2 bodies to joint and what to do with others bodies ? 2) Same solution than the first solution but by having entities ID instead of Joint ID, like in this example : Entity1 - Box2D/Body component { Body => (body parameters), Joints => { Entity2 => (joint parameters), others joints... } } Entity2 - Box2D/Body component { Body => (body parameters), Joints => { Entity1 => (joint parameters), others joints... } } With this solution, we fix the first problem of the first solution but we have always the two others problems. 3) Having a Box2D/Joint component which is inserted in the entities which contains the bodies to joint (we share the same joint component between entities with bodies to joint), like in this example : Entity1 - Box2D/Body component { Body => (body parameters) } - Box2D/Joint component { Joint => (Joint parameters) } // Shared, same as in Entity2 Entity2 - Box2D/Body component { Body => (body parameters) } - Box2D/Joint component { Joint => (joint parameters) } // Shared, same as in Entity1 There are 2 problems with this solution : The first problem is the same problem than in solution 1 and 2 : We can't limit number of bodies to 2 by joint (which is mandatory), a joint can only link 2 bodies, in this solution, nothing prevents to create more than 2 entities with for each a body component and the shared joint component, in this case, how we know the 2 bodies to joint and what to do with others bodies ? The second problem is that we can have only one joint by body because entity components system allows to have only one component of same type in an entity. So we can't put two Joint components in the same entity. 4) Having a Box2D/Joint component which is inserted in the entity which contains the first body component to joint and which has an entity ID parameter (this entity contains the second body to joint), like in this example : Entity1 - Box2D/Body component { Body => (body parameters) } - Box2D/Joint component { Entity2 => (Joint parameters) } // Entity2 is the entity ID which contains the other body to joint, the first body being in this entity Entity2 - Box2D/Body component { Body => (body parameters) } There are exactly the same problems that in the third solution, the only difference is that we can have two differents joints by entity instead of one (by putting one joint component in an entity and another joint component in another entity, each joint referencing to the other entity). 5) Having a Box2D/Joint component which take in parameter the two entities ID which contains the bodies to joint, this component can be inserted in any entity, like in this example : Entity1 - Box2D/Body component { Body => (body parameters) } Entity2 - Box2D/Body component { Body => (body parameters) } Entity3 - Box2D/Joint component { Joint => (Body1 => Entity1, Body2 => Entity2, others parameters of joint) } // Entity1 is the ID of the entity which have the first body to joint and Entity2 is the ID of the entity which have the second body to joint (This component can be in any entity, that doesn't matter) With this solution, we fix the problem of the body limitation by joint, we can only have two bodies per joint, which is correct. And we are not limited by number of joints per body, because we can create an another Box2D/Joint component, referencing to Entity1 and Entity2 and put this component in a new entity. The problem of this solution is : What happens if we change the Body1 or Body2 parameter of Joint component at runtime ? We need to add code to sync the Body1/Body2 parameters changes with the real joint object. 6) Same as solution 3 but in a better way : Having a Box2D/Joint component Box2D/Joint which is inserted in the entities which contains the bodies to joint, we share the same joint component between these entities BUT the difference is that we create a new entity to link the body component with the joint component, like in this example : Entity1 - Box2D/Body component { Body => (body parameters) } // Shared, same as in Entity3 Entity2 - Box2D/Body component { Body => (body parameters) } // Shared, same as in Entity4 Entity3 - Box2D/Body component { Body => (body parameters) } // Shared, same as in Entity1 - Box2D/Joint component { Joint => (joint parameters) } // Shared, same as in Entity4 Entity4 - Box2D/Body component { Body => (body parameters) } // Shared, same as in Entity2 - Box2D/Joint component { Joint => (joint parameters) } // Shared, same as in Entity3 With this solution, we fix the second problem of the solution 3, because we can create an Entity5 which will have the shared body component of Entity1 and an another joint component so we are no longer limited in the joint number per body. But the first problem of solution 3 remains, because we can't limit the number of entities which have the shared joint component. To resolve this problem, we can add a way to limit the number of share of a component, so for the Joint component, we limit the number of share to 2, because we can only joint 2 bodies per joint. This solution would be perfect because there is no need to add code to sync changes like in the solution 5 because we are notified by the entity components system when components / entities are added to/removed from the system. But there is a conception problem : How to know easily and quickly between which bodies the joint operates ? Because, there is no way to find easily an entity with a component instance. My question is : Which solution is the best ? Is there any other better solutions ? Sorry for the long text and my bad english.

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• ClickOnce manifest problem

  - by TWith2Sugars

  We are currently deploying a WPF 4 app via click once and there is a scenario when the installation fails. If the user does not have .Net 4.0 Full install and attempts to install our app the framework installs fine but the app fails to install. If we re-run the installation again the app installs fine. Here is a copy of the log: PLATFORM VERSION INFO Windows : 6.1.7600.0 (Win32NT) Common Language Runtime : 2.0.50727.4927 System.Deployment.dll : 2.0.50727.4927 (NetFXspW7.050727-4900) mscorwks.dll : 2.0.50727.4927 (NetFXspW7.050727-4900) dfdll.dll : 2.0.50727.4927 (NetFXspW7.050727-4900) dfshim.dll : 4.0.31106.0 (Main.031106-0000) SOURCES Deployment url : [URL REMOVED] Server : Apache/2.0.54 Application url : [URL REMOVED] Server : Apache/2.0.54 IDENTITIES Deployment Identity : Graphicly.App.application, Version=0.3.2.0, Culture=neutral, PublicKeyToken=c982228345371fbc, processorArchitecture=msil Application Identity : Graphicly.App.exe, Version=0.3.2.0, Culture=neutral, PublicKeyToken=c982228345371fbc, processorArchitecture=msil, type=win32 APPLICATION SUMMARY * Installable application. ERROR SUMMARY Below is a summary of the errors, details of these errors are listed later in the log. * Dependency Graphicly.WCFClient.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.WCFClient.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Microsoft.Surface.Presentation.Design.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Microsoft.Surface.Presentation.Design.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency GalaSoft.MvvmLight.WPF4.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file GalaSoft.MvvmLight.WPF4.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.Infrastructure.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.Infrastructure.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.AutoUpdater.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.AutoUpdater.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency System.Windows.Interactivity.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file System.Windows.Interactivity.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Microsoft.Surface.Presentation.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Microsoft.Surface.Presentation.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.Fonts.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.Fonts.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.Reader.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.Reader.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Microsoft.Surface.Presentation.Generic.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Microsoft.Surface.Presentation.Generic.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.Controls.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.Controls.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.SocialNetwork.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.SocialNetwork.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.Archive.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.Archive.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency Graphicly.App.exe cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file Graphicly.App.exe: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Dependency GalaSoft.MvvmLight.Extras.WPF4.dll cannot be processed for patching. Following failure messages were detected: + Exception occurred loading manifest from file GalaSoft.MvvmLight.Extras.WPF4.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. * Activation of [URL REMOVED] resulted in exception. Following failure messages were detected: + Exception occurred loading manifest from file GalaSoft.MvvmLight.Extras.WPF4.dll: the manifest may not be valid or the file could not be opened. + Cannot load internal manifest from component file. COMPONENT STORE TRANSACTION FAILURE SUMMARY No transaction error was detected. WARNINGS * The file named Microsoft.Windows.Design.Extensibility.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named Ionic.Zip.Reduced.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named Newtonsoft.Json.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named Microsoft.WindowsAzure.StorageClient.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named Dimebrain.TweetSharp.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named Microsoft.Windows.Design.Interaction.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named HtmlAgilityPack.dll does not have a hash specified in the manifest. Hash validation will be ignored. * The file named Facebook.dll does not have a hash specified in the manifest. Hash validation will be ignored. OPERATION PROGRESS STATUS * [20/05/2010 09:17:33] : Activation of [URL REMOVED] has started. * [20/05/2010 09:17:38] : Processing of deployment manifest has successfully completed. * [20/05/2010 09:17:38] : Installation of the application has started. * [20/05/2010 09:17:39] : Processing of application manifest has successfully completed. * [20/05/2010 09:17:40] : Request of trust and detection of platform is complete. ERROR DETAILS Following errors were detected during this operation. * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.WCFClient.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Microsoft.Surface.Presentation.Design.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file GalaSoft.MvvmLight.WPF4.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.Infrastructure.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.AutoUpdater.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file System.Windows.Interactivity.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Microsoft.Surface.Presentation.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.Fonts.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.Reader.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:40] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Microsoft.Surface.Presentation.Generic.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:41] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.Controls.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:41] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.SocialNetwork.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:41] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.Archive.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:41] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file Graphicly.App.exe: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:41] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file GalaSoft.MvvmLight.Extras.WPF4.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.FileDownloader.AddFilesInHashtable(Hashtable hashtable, AssemblyManifest applicationManifest, String applicationFolder) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: * [20/05/2010 09:17:41] System.Deployment.Application.InvalidDeploymentException (ManifestLoad) - Exception occurred loading manifest from file GalaSoft.MvvmLight.Extras.WPF4.dll: the manifest may not be valid or the file could not be opened. - Source: System.Deployment - Stack trace: at System.Deployment.Application.Manifest.AssemblyManifest.ManifestLoadExceptionHelper(Exception exception, String filePath) at System.Deployment.Application.Manifest.AssemblyManifest.LoadFromInternalManifestFile(String filePath) at System.Deployment.Application.DownloadManager.ProcessDownloadedFile(Object sender, DownloadEventArgs e) at System.Deployment.Application.FileDownloader.DownloadModifiedEventHandler.Invoke(Object sender, DownloadEventArgs e) at System.Deployment.Application.FileDownloader.PatchSingleFile(DownloadQueueItem item, Hashtable dependencyTable) at System.Deployment.Application.FileDownloader.PatchFiles(SubscriptionState subState) at System.Deployment.Application.FileDownloader.Download(SubscriptionState subState) at System.Deployment.Application.DownloadManager.DownloadDependencies(SubscriptionState subState, AssemblyManifest deployManifest, AssemblyManifest appManifest, Uri sourceUriBase, String targetDirectory, String group, IDownloadNotification notification, DownloadOptions options) at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp) at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc) at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl) at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state) --- Inner Exception --- System.Deployment.Application.DeploymentException (InvalidManifest) - Cannot load internal manifest from component file. - Source: - Stack trace: COMPONENT STORE TRANSACTION DETAILS No transaction information is available. I'm baffled. Any ideas what this could be? Cheers Tony

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• Java Port Socket Programming Error

  - by atrus-darkstone

  Hi- I have been working on a java client-server program using port sockets. The goal of this program is for the client to take a screenshot of the machine it is running on, break the RGB info of this image down into integers and arrays, then send this info over to the server, where it is reconstructed into a new image file. However, when I run the program I am experiencing the following two bugs: The first number recieved by the server, no matter what its value is according to the client, is always 49. The client only sends(or the server only receives?) the first value, then the program hangs forever. Any ideas as to why this is happening, and what I can do to fix it? The code for both client and server is below. Thanks! CLIENT: import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import java.io.*; import java.net.Socket; import java.text.SimpleDateFormat; import java.util.*; import javax.swing.*; import javax.swing.Timer; public class ViewerClient implements ActionListener{ private Socket vSocket; private BufferedReader in; private PrintWriter out; private Robot robot; // static BufferedReader orders = null; public ViewerClient() throws Exception{ vSocket = null; in = null; out = null; robot = null; } public void setVSocket(Socket vs) { vSocket = vs; } public void setInput(BufferedReader i) { in = i; } public void setOutput(PrintWriter o) { out = o; } public void setRobot(Robot r) { robot = r; } /*************************************************/ public Socket getVSocket() { return vSocket; } public BufferedReader getInput() { return in; } public PrintWriter getOutput() { return out; } public Robot getRobot() { return robot; } public void run() throws Exception{ int speed = 2500; int pause = 5000; Timer timer = new Timer(speed, this); timer.setInitialDelay(pause); // System.out.println("CLIENT: Set up timer."); try { setVSocket(new Socket("Alex-PC", 4444)); setInput(new BufferedReader(new InputStreamReader(getVSocket().getInputStream()))); setOutput(new PrintWriter(getVSocket().getOutputStream(), true)); setRobot(new Robot()); // System.out.println("CLIENT: Established connection and IO ports."); // timer.start(); captureScreen(nameImage()); }catch(Exception e) { System.err.println(e); } } public void captureScreen(String fileName) throws Exception{ Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Rectangle screenRectangle = new Rectangle(screenSize); BufferedImage image = getRobot().createScreenCapture(screenRectangle); int width = image.getWidth(); int height = image.getHeight(); int[] pixelData = new int[(width * height)]; image.getRGB(0,0, width, height, pixelData, width, height); byte[] imageData = new byte[(width * height)]; String fromServer = null; if((fromServer = getInput().readLine()).equals("READY")) { sendWidth(width); sendHeight(height); sendArrayLength((width * height)); sendImageInfo(fileName); sendImageData(imageData); } /* System.out.println(imageData.length); String fromServer = null; for(int i = 0; i < pixelData.length; i++) { imageData[i] = ((byte)pixelData[i]); } System.out.println("CLIENT: Pixel data successfully converted to byte data."); System.out.println("CLIENT: Waiting for ready message..."); if((fromServer = getInput().readLine()).equals("READY")) { System.out.println("CLIENT: Ready message recieved."); getOutput().println("SENDING ARRAY LENGTH..."); System.out.println("CLIENT: Sending array length..."); System.out.println("CLIENT: " + imageData.length); getOutput().println(imageData.length); System.out.println("CLIENT: Array length sent."); getOutput().println("SENDING IMAGE..."); System.out.println("CLIENT: Sending image data..."); for(int i = 0; i < imageData.length; i++) { getOutput().println(imageData[i]); } System.out.println("CLIENT: Image data sent."); getOutput().println("SENDING IMAGE WIDTH..."); System.out.println("CLIENT: Sending image width..."); getOutput().println(width); System.out.println("CLIENT: Image width sent."); getOutput().println("SENDING IMAGE HEIGHT..."); System.out.println("CLIENT: Sending image height..."); getOutput().println(height); System.out.println("CLIENT: Image height sent..."); getOutput().println("SENDING IMAGE INFO..."); System.out.println("CLIENT: Sending image info..."); getOutput().println(fileName); System.out.println("CLIENT: Image info sent."); getOutput().println("FINISHED."); System.out.println("Image data sent successfully."); } if((fromServer = getInput().readLine()).equals("CLOSE DOWN")) { getOutput().close(); getInput().close(); getVSocket().close(); } */ } public String nameImage() throws Exception { String dateFormat = "yyyy-MM-dd HH-mm-ss"; Calendar cal = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat(dateFormat); String fileName = sdf.format(cal.getTime()); return fileName; } public void sendArrayLength(int length) throws Exception { getOutput().println("SENDING ARRAY LENGTH..."); getOutput().println(length); } public void sendWidth(int width) throws Exception { getOutput().println("SENDING IMAGE WIDTH..."); getOutput().println(width); } public void sendHeight(int height) throws Exception { getOutput().println("SENDING IMAGE HEIGHT..."); getOutput().println(height); } public void sendImageData(byte[] imageData) throws Exception { getOutput().println("SENDING IMAGE..."); for(int i = 0; i < imageData.length; i++) { getOutput().println(imageData[i]); } } public void sendImageInfo(String info) throws Exception { getOutput().println("SENDING IMAGE INFO..."); getOutput().println(info); } public void actionPerformed(ActionEvent a){ String message = null; try { if((message = getInput().readLine()).equals("PROCESSING...")) { if((message = getInput().readLine()).equals("IMAGE RECIEVED SUCCESSFULLY.")) { captureScreen(nameImage()); } } }catch(Exception e) { JOptionPane.showMessageDialog(null, "Problem: " + e); } } } SERVER: import java.awt.image.BufferedImage; import java.io.*; import java.net.*; import javax.imageio.ImageIO; /*IMPORTANT TODO: * 1. CLOSE ALL STREAMS AND SOCKETS WITHIN CLIENT AND SERVER! * 2. PLACE MAIN EXEC CODE IN A TIMED WHILE LOOP TO SEND FILE EVERY X SECONDS * */ public class ViewerServer { private ServerSocket vServer; private Socket vClient; private PrintWriter out; private BufferedReader in; private byte[] imageData; private int width; private int height; private String imageInfo; private int[] rgbData; private boolean active; public ViewerServer() throws Exception{ vServer = null; vClient = null; out = null; in = null; imageData = null; width = 0; height = 0; imageInfo = null; rgbData = null; active = true; } public void setVServer(ServerSocket vs) { vServer = vs; } public void setVClient(Socket vc) { vClient = vc; } public void setOutput(PrintWriter o) { out = o; } public void setInput(BufferedReader i) { in = i; } public void setImageData(byte[] imDat) { imageData = imDat; } public void setWidth(int w) { width = w; } public void setHeight(int h) { height = h; } public void setImageInfo(String im) { imageInfo = im; } public void setRGBData(int[] rd) { rgbData = rd; } public void setActive(boolean a) { active = a; } /***********************************************/ public ServerSocket getVServer() { return vServer; } public Socket getVClient() { return vClient; } public PrintWriter getOutput() { return out; } public BufferedReader getInput() { return in; } public byte[] getImageData() { return imageData; } public int getWidth() { return width; } public int getHeight() { return height; } public String getImageInfo() { return imageInfo; } public int[] getRGBData() { return rgbData; } public boolean getActive() { return active; } public void run() throws Exception{ connect(); setActive(true); while(getActive()) { recieve(); } close(); } public void recieve() throws Exception{ String clientStatus = null; int clientData = 0; // System.out.println("SERVER: Sending ready message..."); getOutput().println("READY"); // System.out.println("SERVER: Ready message sent."); if((clientStatus = getInput().readLine()).equals("SENDING IMAGE WIDTH...")) { setWidth(getInput().read()); System.out.println("Width: " + getWidth()); } if((clientStatus = getInput().readLine()).equals("SENDING IMAGE HEIGHT...")) { setHeight(getInput().read()); System.out.println("Height: " + getHeight()); } if((clientStatus = getInput().readLine()).equals("SENDING ARRAY LENGTH...")) { clientData = getInput().read(); setImageData(new byte[clientData]); System.out.println("Array length: " + clientData); } if((clientStatus = getInput().readLine()).equals("SENDING IMAGE INFO...")) { setImageInfo(getInput().readLine()); System.out.println("Image Info: " + getImageInfo()); } if((clientStatus = getInput().readLine()).equals("SENDING IMAGE...")) { for(int i = 0; i < getImageData().length; i++) { getImageData()[i] = ((byte)getInput().read()); } } if((clientStatus = getInput().readLine()).equals("FINISHED.")) { getOutput().println("PROCESSING..."); setRGBData(new int[getImageData().length]); for(int i = 0; i < getRGBData().length; i++) { getRGBData()[i] = getImageData()[i]; } BufferedImage image = null; image.setRGB(0, 0, getWidth(), getHeight(), getRGBData(), getWidth(), getHeight()); ImageIO.write(image, "png", new File(imageInfo + ".png")); //create an image file out of the screenshot getOutput().println("IMAGE RECIEVED SUCCESSFULLY."); } } public void connect() throws Exception { setVServer(new ServerSocket(4444)); //establish server connection // System.out.println("SERVER: Connection established."); setVClient(getVServer().accept()); //accept client connection request // System.out.println("SERVER: Accepted connection request."); setOutput(new PrintWriter(vClient.getOutputStream(), true)); //set up an output channel setInput(new BufferedReader(new InputStreamReader(vClient.getInputStream()))); //set up an input channel // System.out.println("SERVER: Created IO ports."); } public void close() throws Exception { getOutput().close(); getInput().close(); getVClient().close(); getVServer().close(); } }

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• What are the reasons to select Object Oriented Programming over Procedural Programming?

  - by Starx

  Nowadays, Standard Coding has become Synonymous to Object Oriented Programming. But what are the reasons that forced classical procedural programming out of the way and rose the new concept of Object Oriented Programming. What were the limitations that Procedural Programming could not accomplish? and Does procedural language still hold some value in the field of programming? If yes, What are they, and What are there advantages over OOP?

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• Lot's of errors by insserv on apt-get operations after trying to install tomcat

  - by yankee

  I wanted to install tomcat on my Debian 6.0.4 machine. I tried apt-get install tomcat6-user which worked fine. But then I changed my mind about the user installation and wanted to install the package tomcat6. This resulted in a bunch of errors (see below). Now whatever I try to do with apt-get or with aptitude (trying to remove tomcat6-user, trying to remove tomcat6, trying to perform an apt-get upgrade,...) just results in the same list of errors. How did I manage that? And how can I fix it? # apt-get install tomcat6 Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: authbind Suggested packages: tomcat6-docs tomcat6-admin tomcat6-examples libtcnative-1 The following NEW packages will be installed: authbind tomcat6 0 upgraded, 2 newly installed, 0 to remove and 32 not upgraded. Need to get 56.6 kB of archives. After this operation, 442 kB of additional disk space will be used. Do you want to continue [Y/n]? Get:1 http://mirror.hetzner.de/debian/packages/ squeeze/main authbind amd64 1.2.0 [17.3 kB] Get:2 http://mirror.hetzner.de/debian/security/ squeeze/updates/main tomcat6 all 6.0.35-1+squeeze2 [39.3 kB] Fetched 56.6 kB in 0s (441 kB/s) Preconfiguring packages ... Selecting previously deselected package authbind. (Reading database ... 34717 files and directories currently installed.) Unpacking authbind (from .../authbind_1.2.0_amd64.deb) ... Selecting previously deselected package tomcat6. Unpacking tomcat6 (from .../tomcat6_6.0.35-1+squeeze2_all.deb) ... Processing triggers for man-db ... Setting up authbind (1.2.0) ... Setting up tomcat6 (6.0.35-1+squeeze2) ... Creating config file /etc/default/tomcat6 with new version Adding system user `tomcat6' (UID 108) ... Adding new user `tomcat6' (UID 108) with group `tomcat6' ... Not creating home directory `/usr/share/tomcat6'. insserv: warning: script 'S99iptables-custom' missing LSB tags and overrides insserv: warning: script 'iptables-custom' missing LSB tags and overrides insserv: There is a loop at service iptables-custom if started insserv: There is a loop between service rmnologin and mountnfs if started insserv: loop involving service mountnfs at depth 6 insserv: loop involving service networking at depth 5 insserv: loop involving service kbd at depth 9 insserv: There is a loop between service rmnologin and mountall-bootclean if started insserv: loop involving service mountall-bootclean at depth 5 insserv: loop involving service mountall at depth 4 insserv: There is a loop between service iptables-custom and lvm2 if started insserv: loop involving service lvm2 at depth 2 insserv: loop involving service udev at depth 1 insserv: There is a loop at service rmnologin if started insserv: There is a loop between service iptables-custom and checkroot if started insserv: loop involving service checkroot at depth 2 insserv: loop involving service keyboard-setup at depth 1 insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Max recursions depth 99 reached insserv: loop involving service courier-imap-ssl at depth 1 insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: loop involving service hwclockfirst at depth 2 insserv: loop involving service mountoverflowtmp at depth 9 insserv: loop involving service checkfs at depth 6 insserv: loop involving service mdadm-raid at depth 4 insserv: loop involving service hostname at depth 3 insserv: There is a loop between service iptables-custom and ifupdown-clean if started insserv: loop involving service ifupdown-clean at depth 5 insserv: There is a loop between service rmnologin and mountall if started insserv: There is a loop between service iptables-custom and mountdevsubfs if started insserv: loop involving service mountdevsubfs at depth 1 insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: loop involving service mtab at depth 6 insserv: There is a loop between service rmnologin and mountoverflowtmp if started insserv: Starting iptables-custom depends on rmnologin and therefore on system facility `$all' which can not be true! insserv: exiting now without changing boot order! update-rc.d: error: insserv rejected the script header dpkg: error processing tomcat6 (--configure): subprocess installed post-installation script returned error exit status 1 configured to not write apport reports Errors were encountered while processing: tomcat6 E: Sub-process /usr/bin/dpkg returned an error code (1)

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• Texture switching with a entity system

  - by GameDev-er

  I'm using thinking of using an entity system in my game. So far I've been using Artemis with success. However, I have a question about texture switching. I read that switching textures too often is bad. So I load all the textures when the game loads like so: import org.newdawn.slick.opengl.TextureLoader; ... public HashMap<String, Texture> Textures; ... Then for each texture I do this: Texture tex = TextureLoader.getTexture("PNG", this.getClass().getResourceAsStream(texturePath)); Textures.put(textureName, tex); Then when drawing entities I do this: drawEntity() { glBindTexture(GL_TEXTURE_2D, Textures.get(entityTexture).getTextureID()); ... } Say I have 50 entities, using 10 different 3D models, each with their own texture. When the drawEntity system runs, it doesn't group by which entities use which texture. So I could be switching textures before drawing each entity! Is there a more efficient way to switch textures between entities? Or is glBindTexture() a good option?

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• Solaris 11 Resources for System Administrators

  - by rickramsey

  Have too much to worry about? Let us lighten the load. OTN's job is to filter through all the available resources and take you straight to the content that will help you do your job. For starters ... Oracle Solaris 11 Documentation Library Rock-solid instructions and background from the best tech writers in the business. Includes: Getting Started (including What's New and Release Notes) Installing and Updating (includes info about IPS) Administration Guide Security Guide Working With the Desktop Developing Applications for Solaris 11 Reference Manuals Important Information from Previous Releases Related Information Legal Notes Oracle Solaris 11 Training Oracle University offers training and certification for sysadmins at all levels. If you're familiar with Oracle Solaris 10, these courses are the best way to become familiar with Solaris 11: What's New in Oracle Solaris 11 (self-study) Transition to Solaris 11 - classroom and virtual Solaris 11 Administration - classroom and virtual Solaris 11 Advanced Administration - classroom and virtual These are the education paths for Oracle Certifications on Solaris 11: Oracle Certified Associate Oracle Certified Professional Courses for Solaris System, Network, and Security Administration - scroll to bottom of page for Solaris courses Indexes and Feeds of Our Best How-To Articles We update these indexes and feeds only after we read through the available content and select the best. These are our personal recommendations by topic, product, or audience. We'll be adding content about Oracle Solaris 11 in the coming days and weeks. Keep an eye out. All Systems Indexes Solaris 11 Collection All System Feeds OTN Systems Community Home Page Our Home Page is the same as the front page of a newspaper, but without the advertising. Latest articles, latest useful content from the community, plus links to all the other resources available on OTN. ... And If You Want to Be The First To Know After we select the best content, the first thing we do is hang out at the OTN Garage and talk about it.  Every once in a while we talk about cool cars and motorcycles, too: On Facebook On Twitter On Our Blog - Rick Ramsey Website Newsletter Facebook Twitter

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• Entity component system -> handling components that depend on one another

  - by jtedit

  I really like the idea of an entity component system and feel it has great flexibility, but have a question. How should dependent components be handled? I'm not talking about how components should communicate with other components they depend on, I have that sorted, but rather how to ensure components are present. For example, an entity cannot have a "velocity" component if it doesn't have a "position" component, in the same way it cant have an "acceleration" component if it doesn't have a "velocity" component. My first idea was every component class overrides an "onAddedToEntity(Entity ent)" function. Then in that function it checks that prerequisite components are also added to the entity, eg: struct EntCompVelocity() : public EntityComponent{ //member variables here void onAddedToEntity(Entity ent){ if(!ent.hasComponent(EntCompPosition::Id)){ ent.addComponent(new EntCompPosition()); } } } This has the nice property that if the acceleration component adds the velocity component, the velocity component will itself add the position component to the entity so dependency "trees" will sort themselves out. However my concern is if I do this components will silently be added with default values and, in the example of adding position, many entities will appear at the origin. Another idea was to simple have the "Entity.addComponent();" function return false if the component's prerequisite components aren't already on the entity, this would force you to manually add the position component and set its value before adding the velocity component. Finally I could simply not ensure a components prerequisite components are added, the "UpdatePosition" system only deals with entities with both a position and velocity component, so therefore adding a velocity component without having a position component wont be a problem (it wont cause crashes due to null pointer/etc), but it does mean entities will carry useless unused data if you add components but not their prerequisite components. Does anyone have experience with this problem and/or any of these methods to solve it? How did you solve the problem?

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• Checking out systems programming, what should I learn, using what resources?

  - by Anto

  I have done some hobby application development, but now I'm interested in checking out systems programming (mainly operating systems, Linux kernel etc.). I know low-level languages like C, and I know minimal amounts of x86 Assembly (should I improve on it?). What resources/books/websites/projects etc. do you recommend for one to get started with systems programming and what topics are important? Note that I know close to nothing about the subject, so whatever resources you suggest should be introductory resources. I still know what the subject is and what it includes etc., but I have not done systems programming before (but some application development, as previously noted, and I'm familiar with a bunch of programming languages as well as software engineering in general and algorithms, data structures etc.).

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• Are there any books that teach techniques for effective pair programming?

  - by Paul D. Waite

  I’ve just read the pair programming chapter of ‘Making Software’ by Andy Oram, and I’d like to try it when I next get an opportunity. The chapter mentions that in one of the studies, the subjects were initially given instruction on effective pair programming. Are there any books (or chapters of books) that I could read to get a good grounding in how to do pair programming effectively, so that I’m more prepared?

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• How to obtain flow while pair programming in agile development?

  - by bizso09

  Flow is is concept introduced by Mihaly Csikszentmihalyi In short, it means what most to get into the "zone". You feel immeresed in the task you are doing, you are in deep focus and concentration and the task difficulty is just right for you, but challenging at the same time. When people acquire flow their prodctivity shoots up. Programming requires great deal of mental focus and programmers need to juggle several things in their mind at once. Many like to work in a quite environment where they can direct their full attention to the task. If they are interreupted, it may take several minutes, sometimes hours to get back into flow. I understand that agile way of doing software development is called pair prograaming. This is pormoted in Extreme programming too. It means you put the whole software development team in one room so that communication is seamless. You do programming with your pair because this way you get instant code reviews and fix bugs sooner. However, I alwys had problem obtaining flow while doing pair programming because of the contant stream of interrupts. I'm thinking deep about an issue then all of sudden someone asks me a question from another pair. My train of thought is all lost. How can you obtain and keep flow while doing agile pair programming?

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• Donald Ferguson says end-user programming is next big thing. Is it?

  - by Joris Meys

  You can guess how I came to ask this question... Anyway : http://www.bbc.co.uk/news/business-11944966 Donald Ferguson claiming that his websphere was his biggest disaster and proclaiming that end-user programming will be the way forward. This genuinely spurs the question : what with current programming languages. Honestly, I don't think that end-user programming will go much beyond a rather rigid template where you can build some apps around. If you see how many people actually manage to understand the basic functionality of functions in EXCEL... Plus, I fail to see how complex and performant systems can be built in such an end-user programming language ( Visual Basic, anyone?) Nice to play around with, but for many applications they're just not the thing. So no worries for the old languages if you ask me. What's your ideas?

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• As a programmer, should I know low and high-level programming languages?

  - by job

  I been contacted to do some work remote controlling LEDs displays over TCP/IP, but my experience and preparation is mostly about high-level programming language. I said that to the person who contact me about the work and he told me that: "if you call yourself a programmer you should know all these things" Should a programmer really know the details of low-level programming? Or can I treat it as a black box concept, as theoretical knowledge but not necessarily doing it or implementing low level language solutions, having in mind that low-level programming is not my expertise?

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• Entity Component System, weapon

  - by Heorhiy

  I'm new to game programming and currently trying to understand Entity Component System design by implementing simple 2d game. By ECS I mean design, described here for example In my game I have different kind of weapons: automatic, gun, grenade, etc... Each type of weapon has it's own affect area (gun shots along the straight line and grenade explodes and covers some spherical area) , damage impact, visual effect and bullet amount, delay between shots. So I don't completely understand how to implement weapons. Should weapon be an Entity or it should be a component? And how the player should pick up a weapon, switch between different types of weapons and etc.

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• Is the slow performance of programming languages a bad thing?

  - by Emanuil

  Here's how I see it. There's machine code and it's all that the computers needs in order to run something. The computers don't care about programming languages. It doesn't matter to them if the machine code comes from Perl, Python or PHP. Programming languages exist to serve programmers. Some programming languages run slower than others but that's not necessarily because there is something wrong with them. In many cases it's just because they do more things that otherwise programmers would have to do and by doing these things, they do better what they are supposed to do - serve programmers. So is the slower performance (at runtime) of a programming language really a bad thing?

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• How to learn programming for a medium scale project form a beginner? [closed]

  - by Lin Xiangyu

  I study programming by myself.I have learn servel programming languages. but I never write a project more than 1000 lines. I know the best way to improve programming skills is practise. The problem is many books, just talk about the programming language, or talk about build a project from a high level. Fews of books will teach how to build a middle scale project. For example, I want to build a simple HTTP Server(Nor like Apache or just a simple listenr to a port), a Markdown Parser, or a download tools just like emule or wget. I don't know what to do. I may found peaces of code in the web, or found familiar project in the Github. I don't know how to read the code. I want to some tutorial that can told me how to build the project step by step, teacher me how to write thousands lines of code. Any suggest?

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• What syntax element do you hate most in a programming language you use frequently?

  - by Timwi

  No matter how much you love a programming language, there are always a few details in it that aren’t quite as nice as they could be. In this question, I would like to specifically focus on syntax elements. In a programming language that you use frequently (perhaps your favourite programming language, or perhaps the one you are forced to use at work), which syntax element do you find most unreadable, unclear, inconvenient or unpleasant?

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• What triggered the popularity of lambda functions in modern programming languages?

  - by Giorgio

  In the last few years anonymous functions (AKA lambda functions) have become a very popular language construct and almost every major / mainstream programming language has introduced them or is planned to introduce them in an upcoming revision of the standard. Yet, anonymous functions are a very old and very well-known concept in Mathematics and Computer Science (invented by the mathematician Alonzo Church around 1936, and used by the Lisp programming language since 1958, see e.g. here). So why didn't today's mainstream programming languages (many of which originated 15 to 20 years ago) support lambda functions from the very beginning and only introduced them later? And what triggered the massive adoption of anonymous functions in the last few years? Is there some specific event, new requirement or programming technique that started this phenomenon?

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• How can you achieve and maintain flow while pair programming?

  - by bizso09

  Flow is a concept introduced by Mihaly Csikszentmihalyi; in short, it means to get into the "zone". You feel immersed in your task, focused; the task can be difficult but challenging at the same time. When people achieve flow their productivity shoots up. Programming requires a great deal of mental focus because we often need to juggle several things in our minds at once. Many like to work in a quiet environment where they can direct their full attention to the task. If they are interrupted, it may take several minutes or even hours to get back into flow. I understand there's a practice in agile development and extreme programming called pair programming. It means you put the whole software development team in one room so that communication is seamless. You do write code with your pair because this way you get instant code reviews and fewer bugs get through. I've always had problems achieving flow while doing pair programming because of constant interruptions. I'm thinking deep about an issue then all of sudden someone asks me a question from another pair. My train of thought is lost. How can you achieve and maintain flow while pair programming?

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• How a graphic designer can get into game programming?

  - by Robert Valdez

  I'm a graphic design student hoping to pursue a career as a video game artist. However, I want to do some game development as a hobby. I'd like to develop games for the desktop or mobile phones. The only programming experience I have is that I took an intro to programming with java class in which I learned how to make web applets using java's swing library. It was awful. I think the only things I took from the class was what OOP is and how to work with variables and data types and some methods. I also learned some actionscript myself which was fun unfortunately my flash tutorial expired and it's too expensive to buy;( What I was looking to do is learn one programming language and build a game with it without having to go through so many hoops and with minimum cost. If it's possible. I would love to learn C++, but I read it's not best for a beginning programmer. What programming languages or maybe software kits/platforms would you recommend?

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• Is slower performance, of programming languages, really, a bad thing?

  - by Emanuil

  Here's how I see it. There's machine code and it's all that computers needs in order to run something. Computers don't care about programming languages. It doesn't matter to them whether the machine code comes from Perl, Python or PHP. Programming languages don't serve computers. They serve programmers. Some programming languages run slower than others but that's not necessarily because there is something wrong with them. In many cases, it's because they do more things that programmers would otherwise have to do (i.e. memory management) and by doing these things, they are better in what they are supposed to do - serve programmers. So, is slower performance, of programming languages, really, a bad thing?

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