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  • Having problem with jQuery Countdown? Function serverSync: serverTime

    - by ricky roy
    serverSync: serverTime Function return value from server but I have checked both server and client time both are same.When i called server to sync with server it will not display countdown. help me ? $(function() { var shortly = new Date(); var newTime = new Date('April 9, 2010 20:38:10'); //for loop divid /// $('#defaultCountdown').countdown({ until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime }); $('#div1').countdown({ until: newTime }); }); function serverTime() { var time = null; $.ajax({ type: "POST", //Page Name (in which the method should be called) and method name url: "Default.aspx/GetTime", // If you want to pass parameter or data to server side function you can try line contentType: "application/json; charset=utf-8", dataType: "json", data: "{}", async: false, //else If you don't want to pass any value to server side function leave the data to blank line below //data: "{}", success: function(msg) { //Got the response from server and render to the client time = new Date(msg.d); alert(time); }, error: function(msg) { time = new Date(); alert('1'); } }); shortly = time; return time; }

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  • Binary stream 'NN' does not contain a valid BinaryHeader. Possible causes are invalid stream or obje

    - by FinancialRadDeveloper
    I am passing user defined classes over sockets. The SendObject code is below. It works on my local machine, but when I publish to the WebServer which is then communicating with the App Server on my own machine it fails. public bool SendObject(Object obj, ref string sErrMsg) { try { MemoryStream ms = new MemoryStream(); BinaryFormatter bf1 = new BinaryFormatter(); bf1.Serialize(ms, obj); byte[] byArr = ms.ToArray(); int len = byArr.Length; m_socClient.Send(byArr); return true; } catch (Exception e) { sErrMsg = "SendObject Error: " + e.Message; return false; } } I can do this fine if it is one class in my tools project and the other class about UserData just doesn't want to know. Frustrating! Ohh. I think its because the UserData class has a DataSet inside it. Funnily enough I have seen this work, but then after 1 request it goes loopy and I can't get it to work again. Anyone know why this might be? I have looked at comparing the dlls to make sure they are the same on the WebServer and on my local machine and they look to be so as I have turned on versioning in the AssemblyInfo.cs to double check. Edit: Ok it seems that the problem is with size. If I keep it under 1024 byes ( I am guessing here) it works on the web server and doesnt if it has a DataSet inside it.k In fact this is so puzzling I converted the DataSet to a string using ds.GetXml() and this also causes it to blow up. :( So it seems that across the network something with my sockets is wrong and doesn't want to read in the data. JonSkeet where are you. ha ha. I would offer Rep but I don't have any. Grr

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  • Using Java Executor on AppEngine causes AccessControlException

    - by Drew
    How do you get java.util.concurrent.Executor or CompletionService to work on Google AppEngine? The classes are all officially white-listed, but I get a runtime security error when trying to submit asynchronous tasks. Code: // uses the async API but this factory makes it so that tasks really // happen sequentially Executor executor = java.util.concurrent.Executors.newSingleThreadExecutor(); // wrap Executor in CompletionService CompletionService<String> completionService = new ExecutorCompletionService<String>(executor); final SomeTask someTask = new SomeTask(); // this line throws exception completionService.submit(new Callable<String>(){ public String call() { return someTask.doNothing("blah"); } }); // alternately, send Runnable task directly to Executor, // which also throws an exception executor.execute(new Runnable(){ public void run() { someTask.doNothing("blah"); } }); } private class SomeTask{ public String doNothing(String message){ return message; } } Exception: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) at java.security.AccessController.checkPermission(AccessController.java:546) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166) at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191) at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:288) at java.lang.Thread.init(Thread.java:332) at java.lang.Thread.(Thread.java:565) at java.util.concurrent.Executors$DefaultThreadFactory.newThread(Executors.java:542) at java.util.concurrent.ThreadPoolExecutor.addThread(ThreadPoolExecutor.java:672) at java.util.concurrent.ThreadPoolExecutor.addIfUnderCorePoolSize(ThreadPoolExecutor.java:697) at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:652) at java.util.concurrent.Executors$DelegatedExecutorService.execute(Executors.java:590) at java.util.concurrent.ExecutorCompletionService.submit(ExecutorCompletionService.java:152) This code works fine when run on Tomcat or via command-line JVM. However, it chokes in the AppEngine SDK Jetty container (tried with Eclipse plugin and the maven-gae-plugin). AppEngine is likely designed to not allow potentially dangerous programs to run, so I could see them completely disabling thread creation. However, why would Google allow you to create a class, but not allow you to call methods on it? White-listing java.util.concurrent is misleading. Is there some other way to do parallel/simultaneous/concurrent tasks on GAE?

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  • Why is my Lucene index getting locked?

    - by Andrew Bullock
    I had an issue with my search not return the results I expect. I tried to run Luke on my index, but it said it was locked and I needed to Force Unlock it (I'm not a Jedi/Sith though) I tried to delete the index folder and run my recreate-indicies application but the folder was locked. Using unlocker I've found that there are about 100 entries of w3wp.exe (same PID, different Handle) with a lock on the index. Whats going on? I'm doing this in my NHibernate configuration: c.SetListener(ListenerType.PostUpdate, new FullTextIndexEventListener()); c.SetListener(ListenerType.PostInsert, new FullTextIndexEventListener()); c.SetListener(ListenerType.PostDelete, new FullTextIndexEventListener()); And here is the only place i query the index: var fullTextSession = NHibernate.Search.Search.CreateFullTextSession(this.unitOfWork.Session); var fullTextQuery = fullTextSession.CreateFullTextQuery(query, typeof (Person)); fullTextQuery.SetMaxResults(100); return fullTextQuery.List<Person>(); Whats going on? What am i doing wrong? Thanks

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  • SWI-Prolog as an embedded application in VS2008 C++

    - by H.J. Miri
    I have a C++ application (prog.sln) which is my main program and I want to use Prolog as an embedded logic server (hanoi.pl) int main(int argc, char** argv) { putenv( "SWI_HOME_DIR=C:\\Program Files\\pl" ); argv[0] = "libpl.dll"; argv[1] = "-x"; argv[2] = "hanoi.pl"; argv[3] = NULL; PL_initialise(argc, argv); { fid_t fid = PL_open_foreign_frame(); predicate_t pred = PL_predicate( "hanoi", 1, "user" ); int rval = PL_call_predicate( NULL, PL_Q_NORMAL, pred, 3 ); qid_t qid = PL_open_query( NULL, PL_Q_NORMAL, pred, 3 ); while ( PL_next_solution(qid) ) return qid; PL_close_query(qid); PL_close_foreign_frame(fid); system("PAUSE"); } return 1; system("PAUSE"); } Here is my Prolog source code: :- use_module( library(shlib) ). hanoi( N ):- move( N, left, center, right ). move( 0, _, _, _ ):- !. move( N, A, B, C ):- M is N-1, move( M, A, C, B ), inform( A, B ), move( M, C, B, A ). inform( X, Y ):- write( 'move a disk from ' ), write( X ), write( ' to ' ), write( Y ), nl. I type at the command: plld -o hanoi prog.sln hanoi.pl But it doesn't compile. When I run my C++ app, it says: Undefined procedure: hanoi/1 What is missing/wrong in my code or at the prompt that prevents my C++ app from consulting Prolog? Appreciate any help/pointer.

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  • Java performance problem with LinkedBlockingQueue

    - by lofthouses
    Hello, this is my first post on stackoverflow...i hope someone can help me i have a big performance regression with Java 6 LinkedBlockingQueue. In the first thread i generate some objects which i push in to the queue In the second thread i pull these objects out. The performance regression occurs when the take() method of the LinkedBlockingQueue is called frequently. I monitored the whole program and the take() method claimed the most time overall. And the throughput goes from ~58Mb/s to 0.9Mb/s... the queue pop and take methods ar called with a static method from this class public class C_myMessageQueue { private static final LinkedBlockingQueue<C_myMessageObject> x_queue = new LinkedBlockingQueue<C_myMessageObject>( 50000 ); /** * @param message * @throws InterruptedException * @throws NullPointerException */ public static void addMyMessage( C_myMessageObject message ) throws InterruptedException, NullPointerException { x_queue.put( message ); } /** * @return Die erste message der MesseageQueue * @throws InterruptedException */ public static C_myMessageObject getMyMessage() throws InterruptedException { return x_queue.take(); } } how can i tune the take() method to accomplish at least 25Mb/s, or is there a other class i can use which will block when the "queue" is full or empty. kind regards Bart P.S.: sorry for my bad english, i'm from germany ;)

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  • Having problem dynamically invoking unmanaged VB COM dll from c#?

    - by Ramesh Vel
    I have a problem calling unmanaged VB COM dll from c#. This is dynamic invocation using loadLibrary and GetProcAddress. I can successfully loaded the dll using loadLibrary , but the GetProcAddress always return 0. It wasnt log any error msg and nothing. it just returns 0. below the sample code VB COM VERSION 1.0 CLASS BEGIN MultiUse = -1 Persistable = 0 DataBindingBehavior = 0 DataSourceBehavior = 0 MTSTransactionMode = 0 END Attribute VB_Name = "Sample" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = True Attribute VB_PredeclaredId = False Attribute VB_Exposed = True Option Explicit Private Attribute1 As String Private Sub Class_Initialize() Attribute1 = "test" End Sub Public Sub TestSub() End Sub Public Function testFunction() As String testFunction = "default.html" End Function Public Function SetData(XML As String) As String SetData = Date + Time End Function c# code static class UnManagedInvoker { [DllImport("kernel32.dll")] private static extern IntPtr LoadLibrary([MarshalAs(UnmanagedType.LPStr)] string dllToLoad); [DllImport("kernel32.dll")] private static extern IntPtr GetProcAddress(IntPtr hModule, [MarshalAs(UnmanagedType.LPStr)] string procedureName); [DllImport("kernel32.dll")] private static extern bool FreeLibrary(IntPtr hModule); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate string MethodToInvoke(string sdata); public static string InvokeUnmanagedDll(string dllPath, string methodName) { IntPtr DIedDll = LoadLibrary(dllPath); IntPtr AddressOfFunction = GetProcAddress(DIedDll, methodName); MethodToInvoke MI = (MethodToInvoke)Marshal.GetDelegateForFunctionPointer(AddressOfFunction, typeof(MethodToInvoke)); string data = MI("ssdasda"); FreeLibrary(DIedDll); return data; } } And the calling code string res = UnManagedInvoker.InvokeUnmanagedDll("xx.dll","SetData"); Can someone help me out.. Update: I can successfully call the methods if the component is registered. using the below code Type Med = Type.GetTypeFromCLSID(new Guid("089DD8B0-E12B-439B-B52C-007CA72C93D0")); object MedObj = Activator.CreateInstance(Med); object[] parameter = new object[1]; parameter[0] = "asdasd"; var ss = Med.InvokeMember("SetData", System.Reflection.BindingFlags.InvokeMethod, null, MedObj, parameter); is there a way if the dll not registered.?

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  • How to get contacts in order of they upcoming birthdays?

    - by Pentium10
    I have code to read contacts details and to read birthday. But how do I get a list of contacts in order of they upcoming birthday? For a single contact identified by id I get details and birthday like this. Cursor c = null; try { Uri uri = ContentUris.withAppendedId( ContactsContract.Contacts.CONTENT_URI, id); c = ctx.getContentResolver().query(uri, null, null, null, null); if (c != null) { if (c.moveToFirst()) { DatabaseUtils.cursorRowToContentValues(c, data); } } c.close(); // read birthday c = ctx.getContentResolver() .query( Data.CONTENT_URI, new String[] { Event.DATA }, Data.CONTACT_ID + "=" + id + " AND " + Data.MIMETYPE + "= '" + Event.CONTENT_ITEM_TYPE + "' AND " + Event.TYPE + "=" + Event.TYPE_BIRTHDAY, null, Data.DISPLAY_NAME); if (c != null) { try { if (c.moveToFirst()) { this.setBirthday(c.getString(0)); } } finally { c.close(); } } return super.load(id); } catch (Exception e) { Log.v(TAG(), e.getMessage(), e); e.printStackTrace(); return false; } finally { if (c != null) c.close(); }

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  • Why is ExecuteFunction method only available through base.ExecuteFunction in a child class of Object

    - by Matt
    I'm trying to call ObjectContext.ExecuteFunction from my objectcontext object in the repository of my site. The repository is generic, so all I have is an ObjectContext object, rather than one that actually represents my specific one from the Entity Framework. Here's an example of code that was generated that uses the ExecuteFunction method: [global::System.CodeDom.Compiler.GeneratedCode("System.Data.Entity.Design.EntityClassGenerator", "4.0.0.0")] public global::System.Data.Objects.ObjectResult<ArtistSearchVariation> FindSearchVariation(string source) { global::System.Data.Objects.ObjectParameter sourceParameter; if ((source != null)) { sourceParameter = new global::System.Data.Objects.ObjectParameter("Source", source); } else { sourceParameter = new global::System.Data.Objects.ObjectParameter("Source", typeof(string)); } return base.ExecuteFunction<ArtistSearchVariation>("FindSearchVariation", sourceParameter); } But what I would like to do is something like this... public class Repository<E, C> : IRepository<E, C>, IDisposable where E : EntityObject where C : ObjectContext { private readonly C _ctx; // ... public ObjectResult<E> ExecuteFunction(string functionName, params[]) { // Create object parameters return _ctx.ExecuteFunction<E>(functionName, /* parameters */) } } Anyone know why I have to call ExecuteFunction from base instead of _ctx? Also, is there any way to do something like I've written out? I would really like to keep my repository generic, but with having to execute stored procedures it's looking more and more difficult... Thanks, Matt

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  • MS SQL SELECT stored procedure according to combobox.selectedvalue

    - by Jay
    Hello, In order to fill a datagridview according to the selectedvalue of a combobox I've tried creating a stored procedure. However, as I'm not 100% sure what I'm doing it, depending on the WHERE statement at the end of my stored procedure, either returns everything within the table or nothing at all. This is what's in my class: Public Function GetAankoopDetails(ByRef DisplayMember As String, ByRef ValueMember As String) As DataTable DisplayMember = "AankoopDetailsID" ValueMember = "AankoopDetailsID" If DS.Tables.Count > 0 Then DS.Tables.Remove(DT) End If DT = DAC.ExecuteDataTable(My.Resources.S_AankoopDetails, _Result, _ DAC.Parameter(Const_AankoopID, AankoopID), _ DAC.Parameter("@ReturnValue", 0)) DS.Tables.Add(DT) Return DT End Function Public Function GetAankoopDetails() As DataTable If DS.Tables.Count > 0 Then DS.Tables.Remove(DT) End If DT = DAC.ExecuteDataTable(My.Resources.S_AankoopDetails, _Result, _ DAC.Parameter(Const_AankoopID, AankoopID), _ DAC.Parameter("@ReturnValue", 0)) DS.Tables.Add(DT) Return DT End Function This is the function in the code behind the form I've written in order to fill the datagridview: Private Sub GridAankoopDetails_Fill() Try Me.Cursor = Cursors.WaitCursor dgvAankoopDetails.DataSource = Nothing _clsAankoopDetails.AankoopDetailsID = cboKeuze.SelectedValue dgvAankoopDetails.DataSource = _clsAankoopDetails.GetAankoopDetails Catch ex As Exception MessageBox.Show("An error occurred while trying to fill the data grid: " & ex.Message, "Oops!", MessageBoxButtons.OK) Finally Me.Cursor = Cursors.Default End Try End Sub And finally, this is my stored procedure: (do note that I'm not sure what I'm doing here) USE [Budget] GO /****** Object: StoredProcedure [dbo].[S_AankoopDetails] Script Date: 04/12/2010 03:10:52 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo].[S_AankoopDetails] ( @AankoopID int, @ReturnValue int output ) AS declare @Value int set @Value =@@rowcount if @Value = 0 begin SELECT dbo.tblAankoopDetails.AankoopDetailsID, dbo.tblAankoopDetails.AankoopID, dbo.tblAankoopDetails.ArtikelID, dbo.tblAankoopDetails.Aantal, dbo.tblAankoopDetails.Prijs, dbo.tblAankoopDetails.Korting, dbo.tblAankoopDetails.SoortKorting, dbo.tblAankoopDetails.UitgavenDeelGroepID FROM dbo.tblAankoopDetails INNER JOIN dbo.tblAankoop ON dbo.tblAankoopDetails.AankoopID = dbo.tblAankoop.AankoopID INNER JOIN dbo.tblArtikel ON dbo.tblAankoopDetails.ArtikelID = dbo.tblArtikel.ArtikelID INNER JOIN dbo.tblUitgavenDeelGroep ON dbo.tblAankoopDetails.UitgavenDeelGroepID = dbo.tblUitgavenDeelGroep.UitgavenDeelGroepID WHERE dbo.tblAankoopDetails.Deleted = 0 and dbo.tblAankoopDetails.AankoopID = @AankoopID ORDER BY AankoopID if @@rowcount >0 begin set @ReturnValue=999 end else begin set @ReturnValue=997 end end if @Value >0 begin --Dit wil zeggen dat ik een gebruiker wil ingeven die reeds bestaat. (998) set @ReturnValue=998 end Does anyone know what I'm need to do to resolve this? Kind regards, Jay

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  • Segmentation fault on the server, but not local machine

    - by menachem-almog
    As stated in the title, the program is working on my local machine (ubuntu 9.10) but not on the server (linux). It's a grid hosting hosting package of godaddy. Please help.. Here is the code: #include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { long offset; FILE *io; unsigned char found; unsigned long loc; if (argc != 2) { printf("syntax: find 0000000\n"); return 255; } offset = atol(argv[1]) * (sizeof(unsigned char)+sizeof(unsigned long)); io = fopen("index.dat","rb"); fseek(io,offset,SEEK_SET); fread(&found,sizeof(unsigned char),1,io); fread(&loc,sizeof(unsigned long),1,io); if (found == 1) printf("%d\n",loc); else printf("-1\n"); fclose(io); return 0; } EDIT: It's not my program. I wish I knew enough C in order to fix it, but I'm on a deadline. This program is meant to find the first occurrence of a 7 digit number in the PI sequence, index.dat contains an huge array number = position. http://jclement.ca/fun/pi/search.cgi

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  • .NET Remoting memory leak?

    - by PrimeTSS
    I have a Remoting Class as a Singleton <configuration> <system.runtime.remoting> <application> <service> <wellknown mode="Singleton" type="PTSSLinkClasses.PTSSLinkClientDesktopRemotable, PTSSLinkClasses" objectUri="PTSSLinkDesktop" /> </service> <channels> <channel ref="http" port="8901"/> </channels> </application> </system.runtime.remoting> </configuration> Its created within a "server" Service. Another client service consumes this remote object. The client is calling the remote object every .5 second using a timer (polling) (for testing) If the server service is stopped, so the remote object is not available, memory useage for the client service keeps increasing...... I have overwritten InitialLifetimeService to return a null public override Object InitializeLifetimeService() { return null; } If a remote object is not available does .net queue all the call requests to this object??? untill all the memory is consumed? How can I dected if the remote object is not available and stop trying to call the remote method?

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  • An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll

    - by mazhar
    Ok the thing is that I am using asp.net mvc with linq to sql. I have a scenario where there are two tables group and features with many to many relationship with the third table groupfeatures. I have drag and drop all three table in the dbml file. The thing is that it runs fine with group but when I call the Feature things the above error occured and the compilers stops at this line in ((())). public partial class EgovtDataContext : System.Data.Linq.DataContext { private static System.Data.Linq.Mapping.MappingSource mappingSource = new AttributeMappingSource(); #region Extensibility Method Definitions partial void OnCreated(); partial void InsertGroup(Group instance); partial void UpdateGroup(Group instance); partial void DeleteGroup(Group instance); partial void InsertFeature(Feature instance); partial void UpdateFeature(Feature instance); partial void DeleteFeature(Feature instance); partial void InsertGroupFeature(GroupFeature instance); partial void UpdateGroupFeature(GroupFeature instance); partial void DeleteGroupFeature(GroupFeature instance); #endregion (((public EgovtDataContext() : base(global::System.Configuration.ConfigurationManager.ConnectionStrings["egovtsConnectionString"].ConnectionString, mappingSource)))) The code in both the controller Group and features file is ditto copied. Note the group things are working, the features things are not. FeaturesRepository.cs public IQueryable<Feature> FindAllFeatures() { return db.Features; } FeaturesController.cs FeaturesRepository FeatureRepository = new FeaturesRepository(); public ActionResult Index() { var Feature = FeatureRepository.FindAllFeatures(); return View(Feature); } So what could be wrong?

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  • Visibility of Class field-data of Mouse Clicked ImageButton located within WrapPanel

    - by Bill
    I am attempting to obtain the class-data behind an ImageButton that is mouse-clicked; which ImageButton is located within a WrapPanel filled with ImageButtons. The problem I am having is obtaining the visibility of the field data within the class behind the image-button. Although I can see the class, I can neither see nor access the field data. Can anyone please point me in the right direction? // Handles the ImageButton mouseClick event within the WrapPanel. private void SolarSystem_Click(Object sender, RoutedEventArgs e) { FrameworkElement fe = e.OriginalSource as FrameworkElement; SelectedPlanet PlanetSelected = new SelectedPlanet(fe); PlanetSelected.Owner = this; MessageBox.Show(PlanetSelected.PlanetName); } // Used to initiate instance of Class and some field data. public SelectedPlanet(FrameworkElement fe) { InitializeComponent(); string sPlanetName = ((PlanetClass)(fe)).PlanetName; return sPlanetName } // Class Data public class PlanetClass { string planetName; public PlanetClass(string planetName) { PlanetName = planetName; } public string PlanetName { set { planetName = value; } get { return planetName; } } }

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  • Problem with reCaptcha and .NET

    - by vtortola
    Hi, I get this error with reCaptcha: 'Input error: response: Required field must not be blank challenge: Required field must not be blank privatekey: Required field must not be blank' I'm sending the data via POST, so I don't understand what is going on. This is the code I use: public static Boolean Check(String challenge, String response) { try { String privatekey = "7LeAbLoSAAAABJBn05uo6sZoFNoFnK2XKyF3dRXL"; String remoteip = HttpContext.Current.Request.UserHostAddress; WebRequest req = WebRequest.Create("http://api-verify.recaptcha.net/verify"); req.Method = "POST"; using (StreamWriter sw = new StreamWriter(req.GetRequestStream())) { sw.Write("privatekey={0}&remoteip={1}&challenge={2}&response={3}", privatekey, remoteip, challenge, response); sw.Flush(); } String resultString = String.Empty; String errorString = String.Empty; using (StreamReader sr = new StreamReader(req.GetResponse().GetResponseStream())) { resultString = sr.ReadLine(); errorString = sr.ReadLine(); } Boolean b; return Boolean.TryParse(resultString, out b) && b; } catch (Exception) { return false; } } (Of course that'is not the correct private key :P) I have no idea what the problem is about, I think I'm sending the data correctly, but that error says that apparently I'm not sending anything. What could be the problem? Cheers.

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  • Trouble move-capturing std::unique_ptr in a lambda using std::bind

    - by user2478832
    I'd like to capture a variable of type std::vector<std::unique_ptr<MyClass>> in a lambda expression (in other words, "capture by move"). I found a solution which uses std::bind to capture unique_ptr (http://stackoverflow.com/a/12744730/2478832) and decided to use it as a starting point. However, the most simplified version of the proposed code I could get doesn't compile (lots of template mistakes, it seems to try to call unique_ptr's copy constructor). #include <functional> #include <memory> std::function<void ()> a(std::unique_ptr<int>&& param) { return std::bind( [] (int* p) {}, std::move(param)); } int main() { a(std::unique_ptr<int>(new int())); } Can anybody point out what is wrong with this code? EDIT: tried changing the lambda to take a reference to unique_ptr, it still doesn't compile. #include <functional> #include <memory> std::function<void ()> a(std::unique_ptr<int>&& param) { return std::bind( [] (std::unique_ptr<int>& p) {}, // also as a const reference std::move(param)); } int main() { a(std::unique_ptr<int>(new int())); }

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  • Cocoa memory management

    - by silvio
    At various points during my application's workflow, I need so show a view. That view is quite memory intensive, so I want it to be deallocated when it gets discarded by the user. So, I wrote the following code: - (MyView *)myView { if (myView != nil) return myView; myView = [[UIView alloc] initWithFrame:CGRectZero]; // allocate memory if necessary. // further init here return myView; } - (void)discardView { [myView discard]; // the discard methods puts the view offscreen. [myView release]; // free memory! } - (void)showView { view = [self myView]; // more code that puts the view onscreen. } Unfortunately, this methods only works the first time. Subsequent requests to put the view onscreen result in "message sent to deallocated instance" errors. Apparently, a deallocated instance isn't the same thing as nil. I thought about putting an additional line after [myView release] that reads myView = nil. However, that could result in errors (any calls to myView after that line would probably yield errors). So, how can I solve this problem?

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  • WCF Service Client Lifetime

    - by Burt
    I have a WPF appliction that uses WCF services to make calls to the server. I use this property in my code to access the service private static IProjectWcfService ProjectService { get { _projectServiceFactory = new ProjectWcfServiceFactory(); return _projectServiceFactory.Create(); } } The Create on the factory looks like this public IProjectWcfService Create() { _serviceClient = new ProjectWcfServiceClient(); //ToDo: Need some way of saving username and password _serviceClient.ClientCredentials.UserName.UserName = "Brendan"; _serviceClient.ClientCredentials.UserName.Password = "password"; return _serviceClient; } To access the service methods I use somethingn like the following. ProjectService.Save(dto); Is this a good approach for what I am trying to do? I am getting an errorthat I can't track down that I think may be realted to having too many service client connections open (is this possible?) notice I never close the service client or reuse it. What would the best practice for WCF service client's be for WPF calling? Thanks in advance...

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  • BindAttribute, Exclude nested properties for complex types

    - by David Board
    I have a 'Stream' model: public class Stream { public int ID { get; set; } [Required] [StringLength(50, ErrorMessage = "Stream name cannot be longer than 50 characters.")] public string Name { get; set; } [Required] [DataType(DataType.Url)] public string URL { get; set; } [Required] [Display(Name="Service")] public int ServiceID { get; set; } public virtual Service Service { get; set; } public virtual ICollection<Event> Events { get; set; } public virtual ICollection<Monitor> Monitors { get; set; } public virtual ICollection<AlertRule> AlertRules { get; set; } } For the 'create' view for this model, I have made a view model to pass some additional information to the view: public class StreamCreateVM { public Stream Stream { get; set; } public SelectList ServicesList { get; set; } public int SelectedService { get; set; } } Here is my create post action: [HttpPost] [ValidateAntiForgeryToken] public ActionResult Create([Bind(Include="Stream, Stream.Name, Stream.ServiceID, SelectedService")] StreamCreateVM viewModel) { if (ModelState.IsValid) { db.Streams.Add(viewModel.Stream); db.SaveChanges(); return RedirectToAction("Index", "Service", new { id = viewModel.Stream.ServiceID }); } return View(viewModel); } Now, this all works, apart from the [Bind(Include="Stream, Stream.Name, Stream.ServiceID, SelectedService")] bit. I can't seem to Include or Exclude properties within a nested object.

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  • Add incremental numbers at the end of a string in a loop in Javascript.

    - by Kyle Sevenoaks
    This Javascript is part of a Foreach loop. var stickytooltip={ tooltipoffsets: [20, -30], //additional x and y offset from mouse cursor for tooltips fadeinspeed: 200, //duration of fade effect in milliseconds rightclickstick: false, //sticky tooltip when user right clicks over the triggering element (apart from pressing "s" key) ? stickybordercolors: ["#0a5692", "#0a5692"], //border color of tooltip depending on sticky state stickynotice: ["Press \"s\"", "or right click", "to sticky box"], //customize tooltip status message stickynotice2: "Click outside this box to hide it", //customize tooltip status message //***** NO NEED TO EDIT BEYOND HERE isdocked: false, positiontooltip:function($, $tooltip, e){ var x=e.pageX+this.tooltipoffsets[0], y=e.pageY+this.tooltipoffsets[1] var tipw=$tooltip.outerWidth(), tiph=$tooltip.outerHeight(), x=(x+tipw>$(document).scrollLeft()+$(window).width())? x-tipw-(stickytooltip.tooltipoffsets[0]*2) : x y=(y+tiph>$(document).scrollTop()+$(window).height())? $(document).scrollTop()+$(window).height()-tiph-10 : y $tooltip.css({left:x, top:y}) }, showbox:function($, $tooltip, e){ $tooltip.fadeIn(this.fadeinspeed) this.positiontooltip($, $tooltip, e) }, hidebox:function($, $tooltip){ if (!this.isdocked){ $tooltip.stop(false, true).hide() $tooltip.css({borderColor:'black'}).find('.stickystatus:eq(0)').css({background:this.stickybordercolors[0]}).html(this.stickynotice) } }, docktooltip:function($, $tooltip, e){ this.isdocked=true $tooltip.css({borderColor:'darkred'}).find('.stickystatus:eq(0)').css({background:this.stickybordercolors[1]}).html(this.stickynotice) }, init:function(targetselector, tipid){ jQuery(document).ready(function($){ var $targets=$(targetselector) var $tooltip=$('#'+tipid).appendTo(document.body) if ($targets.length==0) return var $alltips=$tooltip.find('div.atip') if (!stickytooltip.rightclickstick) stickytooltip.stickynotice[1]='' stickytooltip.stickynotice=stickytooltip.stickynotice.join(' ') stickytooltip.hidebox($, $tooltip) $targets.bind('mouseenter', function(e){ $alltips.hide().filter('#'+$(this).attr('data-tooltip')).show() stickytooltip.showbox($, $tooltip, e) }) $targets.bind('mouseleave', function(e){ stickytooltip.hidebox($, $tooltip) }) $targets.bind('mousemove', function(e){ if (!stickytooltip.isdocked){ stickytooltip.positiontooltip($, $tooltip, e) } }) $tooltip.bind("mouseenter", function(){ stickytooltip.hidebox($, $tooltip) }) $tooltip.bind("click", function(e){ e.stopPropagation() }) $(this).bind("click", function(e){ if (e.button==0){ stickytooltip.isdocked=false stickytooltip.hidebox($, $tooltip) } }) $(this).bind("contextmenu", function(e){ if (stickytooltip.rightclickstick && $(e.target).parents().andSelf().filter(targetselector).length==1){ //if oncontextmenu over a target element stickytooltip.docktooltip($, $tooltip, e) return false } }) $(this).bind('keypress', function(e){ var keyunicode=e.charCode || e.keyCode if (keyunicode==115){ //if "s" key was pressed stickytooltip.docktooltip($, $tooltip, e) } }) }) //end dom ready } } //stickytooltip.init("targetElementSelector", "tooltipcontainer") stickytooltip.init("*[data-tooltip]", "mystickytooltip") I need to just add some code to the end of "mystickytooltip" to add 1, 2, 3, 4 each time it loops. My JS-foo is nonexistant, please help :)

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  • How do I reference Django Model from another model

    - by user313943
    Im looking to create a view in the admin panel for a test program which logs Books, publishers and authors (as on djangoproject.com) I have the following two models defined. class Author(models.Model): first_name = models.CharField(max_length=30) last_name = models.CharField(max_length=30) email = models.EmailField() def __unicode__(self): return u'%s %s' % (self.first_name, self.last_name) class Book(models.Model): title = models.CharField(max_length=100) authors = models.ManyToManyField(Author) publisher = models.ForeignKey(Publisher) publication_date = models.DateField() def __unicode__(self): return self.title What I want to do, is change the Book model to reference the first_name of any authors and show this using admin.AdminModels. #Here is the admin model I've created. class BookAdmin(admin.ModelAdmin): list_display = ('title', 'publisher', 'publication_date') # Author would in here list_filter = ('publication_date',) date_hierarchy = 'publication_date' ordering = ('-publication_date',) fields = ('title', 'authors', 'publisher', 'publication_date') filter_horizontal = ('authors',) raw_id_fields = ('publisher',) As I understand it, you cannot have two ForeignKeys in the same model. Can anyone give me an example of how to do this? I've tried loads of different things and its been driving me mad all day. Im pretty new to Python/Django. Just to be clear - I'd simply like the Author(s) First/Last name to appear alongside the book title and publisher name. Thanks

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  • Class Decorators, Inheritence, super(), and maximum recursion

    - by jamstooks
    I'm trying to figure out how to use decorators on subclasses that use super(). Since my class decorator creates another subclass a decorated class seems to prevent the use of super() when it changes the className passed to super(className, self). Below is an example: def class_decorator(cls): class _DecoratedClass(cls): def __init__(self): return super(_DecoratedClass, self).__init__() return _DecoratedClass class BaseClass(object): def __init__(self): print "class: %s" % self.__class__.__name__ def print_class(self): print "class: %s" % self.__class__.__name__ bc = BaseClass().print_class() class SubClass(BaseClass): def print_class(self): super(SubClass, self).print_class() sc = SubClass().print_class() @class_decorator class SubClassAgain(BaseClass): def print_class(self): super(SubClassAgain, self).print_class() sca = SubClassAgain() # sca.print_class() # Uncomment for maximum recursion The output should be: class: BaseClass class: BaseClass class: SubClass class: SubClass class: _DecoratedClass Traceback (most recent call last): File "class_decorator_super.py", line 34, in <module> sca.print_class() File "class_decorator_super.py", line 31, in print_class super(SubClassAgain, self).print_class() ... ... RuntimeError: maximum recursion depth exceeded while calling a Python object Does anyone know of a way to not break a subclass that uses super() when using a decorator? Ideally I'd like to reuse a class from time to time and simply decorate it w/out breaking it.

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  • Java AtomicInteger: what are the differences between compareAndSet and weakCompareAndSet?

    - by WizardOfOdds
    (note that this question is not about CAS, it's about the "May fail spuriously" Javadoc). The only difference in the Javadoc between these two methods from the AtomicInteger class is that the weakCompareAndSet contains the comment: "May fail spuriously". Now unless my eyes are cheated by some spell, both method do look to be doing exactly the same: public final boolean compareAndSet(int expect, int update) { return unsafe.compareAndSwapInt(this, valueOffset, expect, update); } /* ... * May fail spuriously. */ public final boolean weakCompareAndSet(int expect, int update) { return unsafe.compareAndSwapInt(this, valueOffset, expect, update); } So I realize that "May" doesn't mean "Must" but then why don't we all start adding this to our codebase: public void doIt() { a(); } /** * May fail spuriously */ public void weakDoIt() { a(); } I'm really confused with that weakCompareAndSet() that appears to do the same as the compareAndSet() yet that "may fail spuriously" while the other can't. Apparently the "weak" and the "spurious fail" are in a way related to "happens-before" ordering but I'm still very confused by these two AtomicInteger (and AtomicLong etc.) methods: because apparently they call exactly the same unsafe.compareAndSwapInt method. I'm particularly confused in that AtomicInteger got introduced in Java 1.5, so after the Java Memory Model change (so it is obviously not something that could "fail spuriously in 1.4" but whose behavior changed to "shall not fail spuriously in 1.5").

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  • How to generate XML with attributes in .NET?

    - by user292815
    I have that code: ... request data = new request(); data.username = formNick; xml = data.Serialize(); ... [System.Serializable] public class request { public string username; public string password; static XmlSerializer serializer = new XmlSerializer(typeof(request)); public string Serialize() { StringBuilder builder = new StringBuilder(); XmlWriterSettings settings = new XmlWriterSettings(); settings.OmitXmlDeclaration = true; settings.Encoding = Encoding.UTF8; serializer.Serialize( System.Xml.XmlWriter.Create(builder, settings ), this); return builder.ToString(); } public static request Deserialize(string serializedData) { return serializer.Deserialize(new StringReader(serializedData)) as request; } } I want to add attributes to some nodes and create some sub-nodes. Also how to parse xml like that: <answer> <player id="2"> <coordinate axis="x"></coordinate> <coordinate axis="y"></coordinate> <coordinate axis="z"></coordinate> <action name="nothing"></action> </player> <player id="3"> <coordinate axis="x"></coordinate> <coordinate axis="y"></coordinate> <coordinate axis="z"></coordinate> <action name="boom"> <1>1</1> <2>2</2> </action> </player> </answer> p.s. it is not a xml file, it's answer from http server.

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  • C++ thread safety - exchange data between worker and controller

    - by peterchen
    I still feel a bit unsafe about the topic and hope you folks can help me - For passing data (configuration or results) between a worker thread polling something and a controlling thread interested in the most recent data, I've ended up using more or less the following pattern repeatedly: Mutex m; tData * stage; // temporary, accessed concurrently // send data, gives up ownership, receives old stage if any tData * Send(tData * newData) { ScopedLock lock(m); swap(newData, stage); return newData; } // receiving thread fetches latest data here tData * Fetch(tData * prev) { ScopedLock lock(m); if (stage != 0) { // ... release prev prev = stage; stage = 0; } return prev; // now current } Note: This is not supposed to be a full producer-consumer queue, only the msot recent data is relevant. Also, I've skimmed ressource management somewhat here. When necessary I'm using two such stages: one to send config changes to the worker, and for sending back results. Now, my questions assuming that ScopedLock implements a full memory barrier: do stage and/or workerData need to be volatile? is volatile necessary for tData members? can I use smart pointers instead of the raw pointers - say boost::shared_ptr? Anything else that can go wrong? I am basically trying to avoid "volatile infection" spreading into tData, and minimize lock contention (a lock free implementation seems possible, too). However, I'm not sure if this is the easiest solution. ScopedLock acts as a full memory barrier. Since all this is more or less platform dependent, let's say Visual C++ x86 or x64, though differences/notes for other platforms are welcome, too. (a prelimenary "thanks but" for recommending libraries such as Intel TBB - I am trying to understand the platform issues here)

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