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  • Problems with system() calls in Linux

    - by Thomas
    I'm working on a init for an initramfs in C++ for Linux. This script is used to unlock the DM-Crypt w/ LUKS encrypted drive, and set the LVM drives to be available. Since I don't want to have to reimplement the functionality of cryptsetup and gpg I am using system calls to call the executables. Using a system call to call gpg works fine if I have the system fully brought up already (I already have a bash script based initramfs that works fine in bringing it up, and I use grub to edit the command line to bring it up using the old initramfs). However, in the initramfs it never even acts like it gets called. Even commands like system("echo BLAH"); fail. So, does anyone have any input?

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  • NoneType has no attribute Append

    - by Rosarch
    I'm new to Python. I can't understand why a variable is None at a certain point in my code: class UsersInRoom(webapp.RequestHandler): def get(self): room_id = self.request.get("room_id") username = self.request.get("username") UserInRoom_entities = UserInRoom.gql("WHERE room = :1", room_id).get() if UserInRoom_entities: for user_in_room in UserInRoom_entities: if user_in_room.username == username: user_in_room.put() # last_poll auto updates to now whenenever user_in_room is saved else: user_in_room = UserInRoom() user_in_room.username = username user_in_room.put() UserInRoom_entities = [] UserInRoom_entities.append(user_in_room) // error here # name is `user_at_room` intead of `user_in_room` to avoid confusion usernames = [user_at_room.username for user_at_room in UserInRoom_entities] self.response.out.write(json.dumps(usernames)) The error is: Traceback (most recent call last): File "C:\Program Files\Google\google_appengine\google\appengine\ext\webapp\__init__.py", line 507, in __call__ handler.get(*groups) File "path\to\chat.py", line 160, in get AttributeError: 'NoneType' object has no attribute 'append' How is this possible? I'm setting UserInRoom_entities = [] immediately before that call. Or is something else the None in question?

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  • Calling As function from js problem

    - by Gene
    I have a swf file that is not controlled by me. The swf expects a javascript call to set some variables after initialization. The swf is embedded using the swfobject and I'm trying to call the as function right after the embed. This appears to be too soon because I get an error. Everything else should be fine since calling the as function manually via firebug does not produce the error. So the question is how do I call the function when the embed is complete?

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  • C# dll import function correctly

    - by poco
    I am trying to import a function from a c dll into C#. The c function looks like this unsigned short write_buffer( unsigned short device_number, unsigned short word_count, unsigned long buffer_link, unsigned short* buffer) my attempt at a C# import looks like this [DllImport("sslib32.dll", CharSet = CharSet.Ansi, SetLastError = true)] private static extern ushort write_buffer(ushort deviceNumber, ushort wordCount, UInt32 bufferLink, IntPtr buffer) In C# i have a Dictionary of messages that i would like to pass to this function. The Dictionary looks like this: Dictionary<string, List<ushort>> msgs I am a bit confused how to make a make a proper call to pass msgs as the buffer. deviceNumber is 2, wordCount is 32, and buffLink is 0. So i know the call should look something like this write_buffer(2,32,0, msgs[key]); Obviously i am getting an invalid argument for the IntPtr. What is the proper way to make this call?

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  • DevWeek & SQL Server DevCon 2011

    The 14th annual DevWeek conference takes place from 14-18 March 2011, at the Barbican Centre in central London, and once again incorporates two dedicated tracks on SQL Server, alongside seven concurrent tracks aimed at software developers. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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  • OpenStack s'ouvre à Java et PHP, Rackspace publie deux kits de développement pour la plateforme Cloud open source

    OpenStack s'ouvre à PHP et Java Rackspace publie deux kits de développement pour la plateforme Cloud open source OpenStack, la plateforme de Cloud computing public et privé open source qui bénéficie du support des géants de l'IT comme Cisco ou encore HP, est actuellement sous les feux des projecteurs à l'occasion de la conférence OpenStack summit qui se déroule actuellement à San Diego. [IMG]http://idelways.developpez.com/news/images/openstack-logo.gif[/IMG] L'évènement annuel qui s'achèvera le 18 octobre est l'occasion pour les différents acteurs qui utilisent l'écosystème de présenter leurs produits et les évolutions de la plateforme.

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  • Can you make VB.NET compilation as strict as C#?

    - by pete the pagan-gerbil
    In VB.NET, it is entirely possible to pass an integer as a string parameter to a method without calling .ToString() - it's even possible to call .ToString without the ()'s. The code will run without a problem, VB will interpret the integer as a string without having been told to. In C#, these would cause compilation errors - you are required to call .ToString() and to call it correctly in that situation before it will compile. Is there a way to make the VB compilation process check for the same things as the C# compilation process? Would it be best practice in a mixed team to force this check?

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  • Can someone tell me why my dataset wont save correctly to the database in simple winforms app?

    - by Mike
    I have been struggling with this all day and I know it is probably something stupid. My code is below. If I call save then exit my program and start again I can save images to my events but if I just call save when I try to add an image and call save again I get a foreign key error. From what I know I thought my save method was updating the database from my dataset so the event associated with the image should exist. Anyway here is my save method... Private Sub Save() Me.Validate() EventsBindingSource.EndEdit() ImagesBindingSource.EndEdit() TableAdapterManager.UpdateAll(EventDataSet) EventDataSet.AcceptChanges() End Sub Am I doing this wrong? Is this enough detail?

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  • Unknown Column 'template' in where clause, while using a stored procedure.

    - by sai
    Hello, I have a stored procedure, which has got executed without any errors, but gives me an error "#1054: Unknown column 'templateName' in where clause" when I run it. The stored procedure is delimiter // DROP PROCEDURE getData// CREATE DEFINER=root@localhost PROCEDURE getData(IN templateName VARCHAR(45),IN templateVersion VARCHAR(45),IN userId VARCHAR(45)) BEGIN set @version = CONCAT("SELECT 'saveOEMsData_answersVersion' FROM saveOEMsData where 'saveOEMsData_templateName' = ",templateName," and 'saveOEMsData_templateVersion' = ",templateVersion," and 'saveOEMsData_userId'= ",userId); PREPARE s1 from @version; EXECUTE S1; END // delimiter ; Now I call it using "call getData('templateName','1','285');". And whenever I call it, I get the mentioned error. What could the problem be?? It surely is syntactical, I have been reading the mysql manuals for 2 days and have come out without!! Any help would be great!! Thanks

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  • Need to interface to a C++ DLL

    - by Pedro
    Hi, I need to call a C++ API from C#. I have been able to call the API, but the char[] parameters do not seem to be marshalling correctly. Here's the C++ signature: Create2ptModel(double modelPowers[2], double modelDacs[2], int pclRange[2], double targetPowers[32], double *dacAdjustFactor, unsigned short powerRampFactors[32], BOOL bPCLDacAdjusted[32], char calibrationModel[32], char errMsg[1024]) and this is how I am trying to call it from C# [DllImport("AlgorithmsLib.dll", EntryPoint = "_Create2ptModel@36", ExactSpelling = true, CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Auto)] private static extern AlgorithmStatus Create2ptModel( double[] modelPowers, double[] modelDacs, int[] pclRange, double[] targetPowers, ref double dacAdjustFactor, ushort[] powerRampFactors, bool[] bPCLDacAdjusted, /**/char[] calibrationModel, char[] errMsg/**/); Any idea of how I can marshall it correctly? Thanks in advance!

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  • How to find Junit tests that are using a given Java method directly or indirectly

    - by IT-Worx
    Assume there are Java project and Junit project in an Eclipse workspace. And All the unit tests are located in the Junit project and dependent on the application Java project. When making changes to a Java method, I need to find the unit tests that are using the method directly or indirectly, so that I can run the corresponding tests locally in my PC before checking into source control. I don't want to run the entire junit project since it takes time. I could use Eclipse call hierarchy to expand caller methods one by one until I find a test method. But for a project including more than 1 million lines of source code, digging down the call hierarchy takes time too. The search scope within call hierarchy view doesn't seem help much. Appreciate any help.

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  • Finding if a string is an iterative substring?

    - by EsotericMe
    I have a string S. How can I find if the string follows S = nT. Examples: Function should return true if 1) S = "abab" 2) S = "abcdabcd" 3) S = "abcabcabc" 4) S = "zzxzzxzzx" But if S="abcb" returns false. I though maybe we can repeatedly call KMP on substrings of S and then decide. eg: for "abab": call on KMP on "a". it returns 2(two instances). now 2*len("a")!=len(s) call on KMP on "ab". it returns 2. now 2*len("ab")==len(s) so return true Can you suggest any better algorithms?

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  • gprof and execl() - is it possible?

    - by Chris
    Background: I have a game (an old-school-esque MUD) which I've been attempting to profile with gprof. The documentation of gprof (on Linux 2.6) states that The profiled program must call "exit"(2) or return normally for the profiling information to be saved in the gmon.out file. Now, if I kill the server with the shutdown command, the application "returns normally" (i.e., main() returns) and I get a gmon.out to analyze. However, it's far more common to reboot the server. The reboot command does the following: Writes usernames and socket FD numbers to disc. Makes a call to execl(). The new process looks for the stored data, picks up the FDs, and moves on. I see the following error on the command line, as the whole process fails: Profiling timer expired ./program Question: Is it possible to get a gmon.out file from the execl()-calling process? Perhaps some environmental parameter to execl(), or else perhaps a different, gprof-friendly, system call to achieve the same effect (beginning a new process while preserving file descriptors)?

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  • Forcing Reload of View when returning from FlipSideView of Utility Application

    - by Chris McCall
    I've got a Utility Application for iPhone 3.1.3. I have my main view loading fine. I flip over to the flipside view of the utility app and change some settings. How can I call the code I've currently got in viewDidLoad in the main view to refresh it, as settings have changed? Do I create a public method and call it from the viewDidUnload method of the flipside view? Do I call viewDidLoad directly? What's the best way to do this?

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  • Client side validation script dissapears with $.ajax()

    - by boris callens
    In my javascript file I'm getting the content of a partial with the following call: $.ajax({ type: "GET", url: value.href.replace(actionType, actionType + 'Partial'), dataType: "html", success: function(result) { $("#DepartmentsAction").html(result); alert(result); } }); Because the partial has the call Html.EnableClientValidation() the resulting html has a static script in it. In the result variable in the ajax call this script is present. In the page where the html gets inserted (#DepartmentsAction) the script has dissapeared. What am I doing wrong?

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  • Problem with Refreshing data in ExpendableListView

    - by -providerivan.longin1
    Hi! My problem is when I want to refresh data in ExpendableListView while being in that current activity. I create adapter and when I want to add new data to list I call again constructor of that adapter(it is my private variable) with all new data....and then I call onContentChanged() method to redraw my list. But what happens is that I cant expand my list any more...like it is blocked or something and logcat isn't saying anything... This is the code that i call after setting new data in arraylists and maps: mAdapter = new MyExpandableListAdapter( this, groupData, R.layout.contact_list_parent, new String[] { NAME ,NUM_PHOTOS},//NUM_PHOTOS new int[] { R.id.rowText1, R.id.rowText2, R.id.photoAlbumImg }, childData, R.layout.contact_list_child, new String[] { NAME,NUM_PHOTOS}, //NUM_PHOTOS new int[] { R.id.rowText1, R.id.rowText2, R.id.photoAlbumImg } ); this.onContentChanged(); If anyone knows answer to this question please help me:) Thanks.

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  • CodeFluent Entities 2012 disponible en version gratuite, le générateur de code prend en charge Visual Studio 11 & SQL Server 2012

    SoftFluent sort la version gratuite de CodeFluent Entities 2012 Le générateur de code orienté modèle prend en charge Visual Studio 11 & SQL Server 2012 SoftFluent a annoncé la semaine dernière, à la conférence DevWeek, que CodeFluent Entities et son éditeur graphique intégré à Visual Studio prenne à présent en charge Visual Studio 11 Beta, dévoilé le 29 février dernier. Autre annonce, le générateur (« producteur ») de code SQL Server prend lui en charge SQL Server 2012. Pour mémoire, CodeFluent Entities est un générateur de code orienté...

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  • Intel : concours de développement et SDK pour le lancement français de l'AppUp Center, sa nouvelle galerie d'applications

    Participez au lancement de l'Intel AppUp Developer Program en France Intel sort un SDK et organise un concours pour sa nouvelle galerie d'applications Au cours de la deuxième journée de sa conférence dédiée aux développeurs à San Francisco (l'IDF), le 15 septembre dernier, Intel a inauguré officiellement l'AppUp Center, sa boutique d'applications en ligne. Une boutique qui diffusera des applications gratuites ou payantes adaptées aussi bien aux netbooks (en termes de taille d'écran et de mobili...

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  • Android and Linux are growing back together

    <b>Cyber Cynic:</b> "Google's Android, the increasingly important embedded Linux, has had one major problem. It had been moving slowly away from the Linux mainstream. Now, after the recent Linux Foundation Collaboration Conference, Android and Linux are coming back together."

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  • Problem with passing folder path string to web service function via jQuery.ajax

    - by the_V
    Hello, I need to perform asp.net web-service function call via jQuery and pass asp.net application path to it. That's the way I'm trying to do it (code is located within asp.net page, e.g. aspx file): var d = "{'str':'<%=System.DateTime.Now.ToString() %>', 'applicationPath':'<%=GetApplicationPath() %>'}"; $.ajax({ type: "POST", url: "http://localhost/testwebsite/TestWebService.asmx/Test", data: d, contentType: "application/json; charset=utf-8", dataType: "json", error: function (xhr, status, error) { var err = eval("(" + xhr.responseText + ")"); alert(err.Message); }, success: function (msg) { } }); That's what GetApplicationPath method looks like: protected string GetApplicationPath() { return HttpUtility.HtmlEncode(Request.PhysicalApplicationPath); } And here is a header of web-service function which I'm trying to call: public void Test(string str, string applicationPath) Function call works well, but applicationPath parameter doesn't passed correctly. When I debug it I see that backslashes are removed, function gets "C:ProjectsSamplesmytestwebsite" instead of "'C:\Projects\Samples\mytestwebsite\'". How can I overcome this?

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