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  • Detecting a stale Mutex

    - by sum1stolemyname
    Is there any technique or tool available to detect this kind of a deadlock during runtime? picture this in a worker thread (one of several, normally 4-6) try WaitForSingleObject(myMutex); DoSTuffThatMightCauseAnException; Except ReleaseMutex(myMutex); end; or more generally is there a design-pattern to avoid these kind of bugs? I coded the above code in the little hous after a longer hacking run

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  • Security concerns for a multi-language site.

    - by The Rook
    I am converting a PHP MySQL web application written for English language into a Multi-Language site. Do you know any vulnerabilities that affect web applications in another language? Or perhaps vulnerabilities that could be introduced in the conversion of code base to support multiple languages. (If you know any vulnerabilities of this type in another language I'll give you a +1)

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  • Using an ampersand in scanf()

    - by Rob
    When I compile scanf("%s", &var);, gcc sends back a warning: warning: format ‘%s’ expects type ‘char *’, but argument 2 has type ‘char (*)[20]’ however when I compile scanf("%s", var);, no warning is applied. Both pieces of code work and the book I am reading specifically says to use the ampersand, but even it doesn't in some of the examples. My question is, should I continue to use the ampersand, even when the book doesn't specify?

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  • What's the best software development conventions document you have seen?

    - by Pavel Radzivilovsky
    Google C++ development conventions outlaw exceptions, RAII, RTTI and bans the default parameter in parseInt(number, radix=10). Qt API style guide is brilliant, but only covers interfaces. The Robert C. Martin series Clean Code has M104 galaxy on the cover, but it is 462 pages long and based on Java, with no simple "do this" digest. Assuming that it is important to synchronize style and best practices across the organization, what is the smartest, most pleasant and useful conventions document you have worked with?

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  • getting aspect related information reg

    - by GowthamanSS
    Suppose i have these structure as class ss { public void createfile() { StreamWriter sw= new StreamWriter("d:/test.txt"); } } i need to do aspect where ever i use StreamWriter? as for as consideration i already used the below code as [assembly: MyAspect(AttributeTargetAssembly="mscorlib", AttributeTargetTypes="System.IO.File", AttributeTargetMembers="Create"] for file.create method .. it works fine .. Is there any way to solve this problem ... waiting for your response

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  • jquery ie6 issue swaping videos through hide/show while playing.

    - by user217181
    So my code is: Click the link show the div. I'm using the jquery flash embed object. $(document).ready( function() { $('a.overview').click( function() { $('#overview').show(); // show div.contact $('#evaulting').hide(); // hide div.contact $('#his').hide(); // hide div.contact }); }); $(document).ready( function() { $('a.evaulting').click( function() { $('#evaulting').show(); // show div.contact $('#overview').hide(); // hide div.contact $('#his').hide(); // hide div.contact }); }); <div id="overview" style="display:none"> <ul> <li rel="play-norelated.swf:680:480:true:ffffff" class="flash-replaced"> <embed width="680" height="480" type="application/x-shockwave-flash" src="play-norelated.swf" pluginspage="http://www.adobe.com/go/getflashplayer" flashvars="playVideo=ent_web_480x" bgcolor="ffffff" /> <div class="alt"><h1>To Play Iron Mountain Videos - You will need to upgrade your Flash Player</h1> <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p></div> </li> </ul> </div> <div id="evaulting" style="display:none"> <ul> <li rel="play-norelated.swf:680:480:true:ffffff" class="flash-replaced"> <embed width="680" height="480" type="application/x-shockwave-flash" src="play-norelated.swf" pluginspage="http://www.adobe.com/go/getflashplayer" flashvars="playVideo=evaulting_web_480x" bgcolor="ffffff" /> <div class="alt"><h1>To Play Iron Mountain Video's - You will need to upgrade your Flash Player</h1> <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p></div> </li> </ul> </div> When I repeat this code and get the second video to load on click. It works in all browsers. The only issue I'm running into is that in IE6 the video keeps playing and in other browsers it stops the video your watching and loads the one you clicked on. I looked into using the .remove object or the .append to a div, but I can't seem to get that to work and if it does work will it play nice with IE6. Try it out and maybe solve my issues.

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  • EF exception: Could not find file CodeGenerationSchema.xsd

    - by DK
    I'm using Entity Framework for a new project (VS 2008, .net 3.5 sp1) and "reasonably happy" with it, especially compared to dataset-based solutions. One of recurring annoyances is "Could not find file CodeGenerationSchema.xsd" exception during application startup. Exception seems to re-appear rather frequently after changes to the model. Googling gives temporary and strange workarounds for this error: Delete .suo file, or Set Options Debugging General Enable Just My Code = On May be someone have more permanent, straightforward fix or can explain the reason of this issue.

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  • What is Problem in Runtime.getruntime which does not open notepad.exe

    - by magh
    when try to execute the servlet containing following code Runtime rt = Runtime.getRuntime(); Process p = rt.exec("notepad.exe"); It doesn't launch the application in the environment windows server 2003 and Tomcat 5 but a process is being created as notepad.exe in the windows task manager. In windows xp and tomcat 6 environment launches the notepad i need to work on the windows server 2003 and tomcat 5 Thanks in advance

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  • Emacs align-regexp on = but not ==

    - by Karl
    I am working in Haskell and frequently come across code similar to the following: func i j | i == j = i | otherwise = j I want to align on the '=' character using align-regexp but don't have the elisp knowhow. I have tried just doing " = " without the quotes, but this inserts an unwanted space character before each '='. I have found a proposed solution here but I can't seem to get that to do anything at all. Please help me write a function or hard-coded macro that will allow me to set a keybinding for this.

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  • C++ Map of Vector of Structs?

    - by garsh0p
    So here's a snippet of my code: struct dv_nexthop_cost_pair { unsigned short nexthop; unsigned int cost; }; map<unsigned short, vector<struct dv_nexthop_cost_pair> > dv; I'm getting the following compiler error: error: ISO C++ forbids declaration of `map' with no type What's the proper way to declare this?

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  • Update Label Value in Cocos2d

    - by Viral
    hi friends I am making a game in cocos2d , In that while updating score the old score values get on the label and the new value get overwritten. I m using following code to display the score, LblScore = [CCLabel labelWithString:[NSString stringWithFormat:@"%d",score] dimensions:CGSizeMake(100, 300) alignment:UITextAlignmentCenter fontName:@"Arial" fontSize:32.0]; Because of this the score value are not shown and all things get massed up, If any one having idea how to update new score?

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  • linq to sql with nservicebus table lock issue

    - by IGoor
    I am building a system using NServiceBus and my DataLayer is using Linq 2 SQL. The system is made up of 2 services. Service1 receives messages from NSB. It will query Table1 in my database and inserts a record into Table1 If a certain condition is met a new NSB message is sent to the 2nd service Service2 will update records also in Table1 when it receives messages from Service1 and it does some other non database related work. Service2 is a long running process. The problem I am having is the moment Service2 updates a record in Table1, the table is locked. The lock seems to be in place until Service2 has completed all it is processing. i.e. The lock is not released after my datacontext is disposed. This causes the query in Service1 to timeout. Once Service2 completes processing, Service1 resumes processing again without problem. So for example Service1 code may look like: int x =0; using (DataContext db = new DataContext()) { x = (from dp in db.Table1 select dp).Count(); // this line will timeout while service2 is processing Table1 t = new Table1(); t.Data = "test"; db.Table1.InsertOnSubmit(t); db.SubmitChanges(); } if(x % 50 == 0) CallService2(); The code in service2 may look like: using (DataContext db = new DataContext()) { Table1 t = db.Table1.Where(t => t.id == myId); t.Data = "updated"; db.SubmitChanges(); } // I would have expected the lock to have been released at this point, but this is not the case. DoSomeLongRunningTasks(); // lock will be released once service2 exits I don't understand why the lock is not released when the datacontext is disposed in Service2. To get around the problem I have been calling: db.ExecuteCommand("SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED"); and this works, but I am not happy using it. I want to solve this problem properly. Has any one experienced this sort of problem before and does any one know how to solve it? Why is the lock not released after the datacontext has been disposed? Thanks in advance. p.s. sorry for the extremely long post.

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  • Visual Studio keeps running the old build

    - by Mike Pike
    Hello. I have a simple Silverlight program that displays a bunch of images. I modified it do display more images, but it when I hit "run without debugging" is keeps running the old build with fewer images. When I copy the code into a new project and run it, it works fine for the first time, but then each subsequent change is not displayed. What could be the problem? I'm using Visual Web Developer 2008 Express.

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  • using regular expression in Java

    - by Mrityunjay
    Hi, i need to check a string that should contain only ABCDEFG characters, in any sequence and with only 7 characters. Please let me know the correct way of using regular expression. as corrently i am using String abs = "ABPID"; if(!Pattern.matches("[[ABCDEFG]", abs)) System.out.println("Error"); i am using the following code which works when i use the String abcdefg but for other cases it fails. please help me out.

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  • Meassure website

    - by s0mmer
    Hi, I was wondering if it is possible to install or use any online service to measure your website's performance? I've seen many just checking the download speed of images, external files etc. But is it possible to meassure how long asp/php code takes to execute? I have a site running a bit slowly, and it would be very nice with some app/service guiding where to optimize.

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  • asp mvc: how to pass parameter to controller using jquery api?

    - by Grayson Mitchell
    I am following the following tutorial (http://www.highoncoding.com/Articles/642_Creating_a_Stock_Widget_in_ASP_NET_MVC_Application.aspx) on using ajax to render a partial form , but in this example parameters are not passed, and I have not been able to work out how to do it... This code works with no parameter function GetDetails() { $("#divDetails").load('Details'); } This is my attempt to add a parameter, but does not work (cant find action) function GetDetails() { $("#divDetails").load('Details?Id=20'); }

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  • JBoss Service with SSL and Protocol Buffers

    - by mlaverd
    Hello everyone, I'm interested in building a JBoss service. Because I'm reusing some existing code, the service must be able to talk SSL/TLS and Protocol Buffers. The documentation I see on the JBoss wiki makes it look like services have their transport and data interpretation handled by JBoss itself. Is it really the case? How could I implement this requirement? Regards, M-A

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