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• My JVM crahes when i run my program.

  - by rgksugan

  I have written a program to process packets. The program runs well if its run alone but when i integrate it to my main project the jvm crashes and shows the below result. What is the problem? # # An unexpected error has been detected by HotSpot Virtual Machine: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d7dcf6e, pid=4328, tid=4068 # # Java VM: Java HotSpot(TM) Client VM (1.5.0_16-b02 mixed mode, sharing) # Problematic frame: # V [jvm.dll+0x9cf6e] # # An error report file with more information is saved as hs_err_pid4328.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp #

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• How to reduce compilation times with Boost Asio

  - by Artyom

  Boost.Asio is great library but it has one huge drawback -- extreamly slow compilation times. A simple implementation (really simple) of HTTP protocol (about 1k lines of code) requires about 13.5s to compile under GCC 4.4! I tryed to use PCH but it does not improve compilation times too much (about 1s. only). So are there any tutorials on how to make Boost.Asio compilation times faster? For example what headers should I exactly include for what class. I use for example: io_service, tcp::ip::sockets, tcp::ip::acceptor, deadline_timer, buffers and few functions like async_read, async_write. Any suggestions? P.S.: I do use pimpl whenever I can.

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• Clone a div that contains "customized" jQueryUI datePicker

  - by Enrique

  I have a div that contains 3 fields You can see the image here http://imgur.com/A3tbd.jpg I'm cloning this div with this plugin http://sroucheray.org/blog/demos/jquery-dynamic-form/ My problems are: It doesn't clone correctly datePicker. I'm using validate form plugin, but I guess this plugin is not prepared to validate cloned elements Is there any easy code, other plugin or some functions I should use for doing this sequence? Verify user has filled the 3 fields of the actual div If so, clone the div and create a new set of 3 fields. Also, clone datePicker correctly If user clicks the delete button, erase last div (last 3 fields) When form submitted, post all fields correctly Thanks,

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• T4MVC adding current page controller to action link

  - by Mike Flynn

  I have the following ActionLink that sits in the home page on the register controller (Index.cshtml) @Html.ActionLink("terms of service", Url.Action(MVC.Home.Terms()), null, new { target="_blank" }) Generating the following URL. Why is "register" being added to it? It's as if the link within the Register page which has it's own controller is preappending the register controller to any link in that view? http://localhost/register/terms-of-service routes.MapRoute( "Terms", "terms-of-service", new { controller = "Home", action = "Terms" } ); public partial class HomeController : SiteController { public virtual ActionResult Terms() { return View(new SiteViewModel()); }

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• ASP.NET MVC on IIS6

  - by Seb Nilsson

  Where can I find some good pointers on best practices for running ASP.NET MVC on IIS6? I haven't seen any realistic options for web-hosts who provide IIS7-hosting yet. Mostly because I don't live in the U.S. So I was wondering on how you best build applications in ASP.NET MVC and make it easily available to deploy on both IIS6 and IIS7. Keep in mind that this is for standard web-hosts, so there is no access to ISAPI-filters or special settings inside IIS6. Are there anything else one should think about when developing ASP.NET MVC-applications to target IIS6? Any functions that doesn't work? UPDATE: One of the bigger issues is the thing with routes. The pattern {controller}/{action} will work on IIS7, but not IIS6 which needs {controller}.mvc/{action}. So how do I make this transparent? Again, no ISAPI and no IIS-settings, please.

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• Impersonation and Delegation

  - by Samuel Kim

  I am using impersonation is used to access file on UNC share as below. var ctx = ((WindowsIdentity)HttpContext.Current.User.Identity).Impersonate(); string level = WindowsIdentity.GetCurrent().ImpersonationLevel); On two Windows 2003 servers using IIS6, I am getting different impersonation levels: Delegation on one server and Impersonation on the other server. This causes issues where I am unable to access the UNC share on the server with 'Impersonation' level. What could be causing this difference? I searched through machine.config and IIS settings for the app pool, site and virtual directories - but aren't able to find the cause of this problem.

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• Zend AMF throwing InvocationTargetException

  - by Roopesh Shenoy

  Hi, I am trying to make a service call to a php function from flex, through Zend AMF. Most of the functions get called fine, but for one particular function, it throws the following exception: InvocationTargetException:There was an error while invoking the operation. Check your operation inputs or server code and try invoking the operation again. Reason: Fatal error: Call to a member function getInvokeArguments() on a non-object in D:\wamp\www\ZendFramework\library\Zend\Amf\Server.php on line 328 I am not able to debug through this - has anyone faced any issue like this before, or have any ideas how this can be debugged?

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• Object Slicing, Is it advantage ?

  - by harigm

  Object slicing is some thing that object looses some of its attributes or functions when a child class is assigned to base class. Some thing like Class A{ } Class B extends A{ } Class SomeClass{ A a = new A(); B b = new B(); // Some where if might happen like this */ a = b; (Object slicing happens) } Do we say Object slicing is any beneficial in any ways? If yes, can any one please tell me how object slicing be a helpful in development and where it might be helpful?

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• Symbian qt threading

  - by Umesha MS

  Hi, 1) In symbian c++ thread is not recommended. Instead of that they recommend active object for multi tasking. Presently I am using QT to develop a application in symbian. Since there is no active object in QT I thought of using thread. My question is , can I use thread, is it is recommended. If it is not recommended, how to achieve multitasking. 2) I have created a sample thread class as shown bellow. When I call test function from the constructer of the main window thread will start but UI will be in hung state, infact main window itself will not be displayed. Please help me to solve the problem. class CSampleThread: public QThread { Q_OBJECT public: CSampleThread(QObject *parent = 0) : QThread(parent) {} virtual ~CSampleThread() {} void test(){ QThread::start(LowPriority); } protected: void run() { while(true){} } };

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• PocketSphinx, file is not of required architecture in iPhone Device but working in simulator?

  - by Jeevan

  Hello all, I'm new to apple development, For my Uni project I try developing an application for iPhone using PocketSphinx to recognise speech commands... I used the "build_for_iphoneos.sh" script available in PocketSphinx SVN and SphinxBase. Program working without any issues when i try it on simulator, today I try to deploy on device and it's giving me this error? can any one help me solve this please? Error: ld: warning: in /Users/me/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk/lib/libpocketsphinx.a, file is not of required architecture ld: warning: in /Users/me/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk/lib/libsphinxbase.a, file is not of required architecture and the rest of the references to functions report undefined error! any help? Thanks. Jeevan

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• The difference between traditional DLL and COM DLL.

  - by smwikipedia

  I am currently studying COM. I found that COM DLL is kind of built upon the traditional DLL infrastructure. When we build COM DLLs, we still rely on the traditional DLL export methods to lead us to the internal COM co-classes. If COM is for component reusing at the binary level, I think the traditional DLL can achieve the same thing. They both expose functions, they are both binary, so what's the point of turning to COM approach? Currently, I have the feeling that the traditional DLL expose methods in a "flat" manner, while the COM DLL expose methods in an "OOP" hierarchy manner. And the OOP manner seems to be a better approach. Could this be the reason why COM prevails? Many thanks.

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• Sharing a custom datasource between Winforms and Webforms

  - by Earlz

  Hello, I'd like to create a custom datasource that is shared between a Winforms and Webforms project. This functions as a middle layer for a reporting tool(DevExpress Reporting). The Webforms project is a designer for these reports. So we want for the reports to be capable of going to the server to get data and such. So our datasource would abstract away all the communication overhead. Then, for consistency, the datasource would also run on the server for reporting, except for their would be no communication. What would be the best course of action? There doesn't seem to be such a thing as a DataSource in Winforms. Is DataSource not the thing I'm looking for? Edit: After some research, it appears that IDataAdapter may be good for my purpose. Any opinion on that?

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• Learning Ruby on Rails

  - by Ethan Gunderson

  As it stands now I'm a Java and C# developer, but the more and more I look at Ruby on Rails, the more I really want to learn it. What have you found to be the best route to learn RoR? Would it be easier to develop on Windows, or should I just run a virtual machine with linux? Is there an ide that can match the robustness of Visual Studio? Any programs to develop that give a good overhead of what to do? Any good books? Seriously, any tips/tricks/rants would be awesome.

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• Save a binary file in SQL Server as BLOB and text (or get the text from Full-Text index)

  - by Glennular

  Currently we are saving files (PDF, DOC) into the database as BLOB fields. I would like to be able to retrieve the raw text of the file to be able to manipulate it for hit-highlighting and other functions. Does anyone know of a simple way to either parse out the files and save the raw text on save, either via SQL or .net code. I have found that Adobe has a filtdump utility that will convert the PDF to text. Filtdump seems to be a command line tool, and i don't see a way to use a file stream. And what would the extractor be for Office documents and other file types? -or- Is there a way to pull out the raw text from the Full text index? Note i am trying to build a .net & MSSql solution without having to use a third party tool such as Lucene

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• Confusing rails div id naming

  - by RailAddict

  I have started using jQuery and rails. I have made a simple form that submits to the database and updates the page without reloading with ajax. In my jQuery functions I used $"#new_comment" for the id name (in my application.js and create.js.erb files) but on my articles/show view file, I named the div "add_comment" and it works.. I renamed it new_comment and it breaks! Can someone explain it please? I get an error: "no action responded to 1" My function in my controller is "create".

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• asp.net search application index update help

  - by srinivasan

  hi im developing a simple search application( ASP.Net VB.Net) the index table is actually a hash table ll be stored in my file system. the search page ll open this in read mode n copy this to a hash table object n perform search. other update n delete functions will open this in write mode n update it. what should i ve to do to make this app correct that there shud not be any execption when multiple user accessing these things at the same time. wat do i ve to do to make this robust and error free. i want multiple users to access search page without any problem n the index updation also in a parallel manner thanks srinivasan

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• DJ JWebBrowser: how to show but disable Address and Button bars?

  - by Nikolay Kuznetsov

  I am using chrriis.dj.nativeswing.swtimpl.components.JWebBrowser in my swing application to open web page. The page is going to show "Facebook Authentication" page and I want to prevent user from inputting some other URL other than I specify and also Forward and Back buttons should be visible but not has no affect. So following functions are applicable for my goal setButtonBarVisible(true); setLocationBarVisible(true); Once user completes the authentication I will handle the locationChanged event. @Override public void locationChanged(WebBrowserNavigationEvent arg0) { System.out.println("locationChanged!"); .... } }

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• Copy Structure To Another Program

  - by Steven

  Long story, long: I am adding a web interface (ASPX.NET: VB) to a data acquisition system developed with LabVIEW which outputs raw data files. These raw data files are the binary representation of a LabVIEW cluster (essentially a structure). LabVIEW provides functions to instantiate a class or structure or call a method defined in a .NET DLL file. I plan to create a DLL file containing a structure definition and a class with methods to transfer the structure. When the webpage requests data, it would call a LabVIEW executable with a filename parameter. The LabVIEW code would instantiate the structure, populate the structure from the data file, then call the method to transfer the data back to the website. Long story, short: How do you recommend I transfer (copy) an instance of a structure from one .NET program to a VB.NET program? Ideas considered: sockets, temp file, xml file, config file, web services, CSV, some type of serialization, shared memory

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• Saving an image in OpenCV

  - by Sujay Ghosh

  I am new to OpenCV, and trying to capture an image, and then save it to a file. I am posting the code for your reference, below. The jpg file is being saved, but it is black. // Capture the Image from the webcam CvCapture *pCapturedImage = cvCreateCameraCapture(0); // Get the frame IplImage *pSaveImg = cvQueryFrame(pCapturedImage); // Save the frame into a file cvSaveImage("test.jpg". ,pSaveImg); // A JPG FILE IS BEING SAVED // OF 6KB , BUT IT IS BLACK All of the functions are succesful. I have tried the above code in both XP and Vista - the result is a black image on both. Please let me know what I am missing out.

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• A cross between std::multimap and std::vector?

  - by Milan Babuškov

  I'm looking for a STL container that works like std::multimap, but has constant access time to random n-th element. I need this because I have such structure in memory that is std::multimap for many reasons, but items stored in it have to be presented to the user in a listbox. Since amount of data is huge, I'm using list box with virtual items (i.e. list control polls for value at line X). As a workaround I'm currently using additional std::vector to store "indexes" into std::map, and I fill it like this: std::vector<MMap::data_type&> vec; for (MMap::iterator it = mmap.begin(); it != mmap.end(); ++it) vec.push_back((*it).second); But this is not very elegant solution. Is there some such containter?

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• #if 0 as a define

  - by valerio

  I need a way to define a FLAGS_IF macro (or equivalent) such that FLAGS_IF(expression) <block_of_code> FLAGS_ENDIF when compiling in debug (e.g. with a specific compiler switch) compiles to if (MyFunction(expression)) { <block_of_code> } whereas in release does not result in any instruction, just as it was like this #if 0 <block_of_code> #endif In my ignorance on the matter of c/c++ preprocessors i can't think of any naive way (since #define FLAGS_IF(x) #if 0 does not even compile) of doing this, can you help? I need a solution that: Does not get messed up if */ is present inside <block_of_code> Is sure to generate 0 instructions in release even inside inline functions at any depth (i guess this excludes if (false){<block_of_code>} right?) Is standard compliant if possible Thank you

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• Fetching custom Authorization header from incoming PHP request

  - by jpatokal

  So I'm trying to parse an incoming request in PHP which has the following header set: Authorization: Custom Username Simple question: how on earth do I get my hands on it? If it was Authorization: Basic, I could get the username from $_SERVER["PHP_AUTH_USER"]. If it was X-Custom-Authorization: Username, I could get the username from $_SERVER["HTTP_X_CUSTOM_AUTHORIZATION"]. But neither of these are set by a custom Authorization, var_dump($_SERVER) reveals no mention of the header (in particular, AUTH_TYPE is missing), and PHP5 functions like get_headers() only work on responses to outgoing requests. I'm running PHP 5 on Apache with an out-of-the box Ubuntu install.

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• Using Yii framework, what would be a right way to process an attribute before displaying it using CH

  - by Karolis

  Say I have this line of code in the view. <?php echo CHtml::activeTextField($model,'start_time'); ?> start_time is a UNIX timestamp. When just displaying it in a view I can apply functions like date() on it. Where should I apply the formatting when I'm displaying it in a form, by using the above line of code? (This case of timestamps/dates might be special, but I'm also interested in how would one go about if it wasn't a date and I just want to work with "value in database" < "different representations of the value in different views. Thanks =)

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• A tool to find and fix incomplete source code documentation

  - by Pekka

  I have several finished, older PHP projects with a lot of includes that I would like to document in javadoc/phpDocumentor style. While working through each file manually and being forced to do a code review alongside the documenting would be the best thing, I am, simply out of time constraints, interested in tools to help me automate the task as much as possible. The tool I am thinking about would ideally have the following features: Parse a PHP project tree and tell me where there are undocumented files, classes, and functions/methods (i.e. elements missing the appropriate docblock comment) Provide a method to half-way easily add the missing docblocks by creating the empty structures and, ideally, opening the file in an editor (internal or external I don't care) so I can put in the description. Optional: Automatic recognition of parameter types, return values and such. But that's not really required. The language in question is PHP, though I could imagine that a C/Java tool might be able to handle PHP files after some tweaking. Thanks for your great input!

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• Linux Kernel - programmatically retrieve block numbers as they are written to

  - by SpdStr

  I want to maintain a list of block numbers as they are physically written to using the linux kernel source. I plan to modify the kernel source to do this. I just need to find the structure and functions in the kernel source that handle writing to physical partitions and get the block numbers as they write to the physical partition. Any way of doing this? Any help is appreciated. If I can find where the kernel is actually writing to the partitions and returning the block numbers, that'd work.

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