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Forum Update on Monday, May 27th 2025

Using large data structure for storage!

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  • K Kushan

    @jsulm

    Sorry I made a mistake(The above mentioned error still exists;) the code is

    QList<QStringList> sample;
    QString Test="Testing";
    QStringList List;

    for(int i=0;i<number;i++){
    List<<Test;
    }

    for(int i=0;i<number;i++){
    sample<<List;
    }

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by jsulm
    #10

    @Kushan I tested this code: it does not crash (and I don't see why it should).
    As I said you should first debug to see where it actually crashes.
    And you still did not say how big your strings are. If they are huge then maybe your app gets out of memory and is terminated by the OS.

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    K 1 Reply Last reply
    0
    • jsulmJ jsulm

      @Kushan I tested this code: it does not crash (and I don't see why it should).
      As I said you should first debug to see where it actually crashes.
      And you still did not say how big your strings are. If they are huge then maybe your app gets out of memory and is terminated by the OS.

      K Offline
      K Offline
      Kushan
      wrote on last edited by
      #11

      @jsulm No this is just a sample the actual QString is very long :(

      jsulmJ 1 Reply Last reply
      0
      • K Kushan

        @jsulm No this is just a sample the actual QString is very long :(

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #12

        @Kushan How long?

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        K 1 Reply Last reply
        0
        • jsulmJ jsulm

          @Kushan How long?

          K Offline
          K Offline
          Kushan
          wrote on last edited by
          #13

          @jsulm actually
          QString Test="New,0,0,Instrument1,Order,Buy,100,Amend, Quote"

          jsulmJ 1 Reply Last reply
          0
          • K Kushan

            @jsulm actually
            QString Test="New,0,0,Instrument1,Order,Buy,100,Amend, Quote"

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #14

            @Kushan That's not long.
            Please debug you app to see where it is crashing. I'm out of ideas as the code you posted doesn't crash and there is not enough information to tell you why your app is crashing.

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            K 1 Reply Last reply
            0
            • jsulmJ jsulm

              @Kushan That's not long.
              Please debug you app to see where it is crashing. I'm out of ideas as the code you posted doesn't crash and there is not enough information to tell you why your app is crashing.

              K Offline
              K Offline
              Kushan
              wrote on last edited by
              #15

              @jsulm Thanx alot how to use the debug?

              jsulmJ 1 Reply Last reply
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              • K Kushan

                @jsulm Thanx alot how to use the debug?

                jsulmJ Offline
                jsulmJ Offline
                jsulm
                Lifetime Qt Champion
                wrote on last edited by
                #16

                @Kushan Take a look at http://doc.qt.io/qtcreator/creator-debugging-example.html
                and http://doc.qt.io/qtcreator/creator-debugging.html

                https://forum.qt.io/topic/113070/qt-code-of-conduct

                K 1 Reply Last reply
                2
                • jsulmJ jsulm

                  @Kushan Take a look at http://doc.qt.io/qtcreator/creator-debugging-example.html
                  and http://doc.qt.io/qtcreator/creator-debugging.html

                  K Offline
                  K Offline
                  Kushan
                  wrote on last edited by
                  #17

                  @jsulm Thanx for sparing your time

                  jsulmJ 1 Reply Last reply
                  0
                  • K Kushan

                    @jsulm Thanx for sparing your time

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #18

                    @Kushan No problem

                    https://forum.qt.io/topic/113070/qt-code-of-conduct

                    K 1 Reply Last reply
                    0
                    • jsulmJ jsulm

                      @Kushan No problem

                      K Offline
                      K Offline
                      Kushan
                      wrote on last edited by
                      #19

                      @jsulm Actually the error is indexout of bound but I havent declared any size anywhere in my code for all the structures I have used!

                      jsulmJ 1 Reply Last reply
                      1
                      • K Kushan

                        @jsulm Actually the error is indexout of bound but I havent declared any size anywhere in my code for all the structures I have used!

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #20

                        @Kushan Are you accessing list elements using [] anywhere in your code like

                        QList<QString> list;
                        qDebug() <<list[0];
                        

                        ?

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        K 2 Replies Last reply
                        0
                        • jsulmJ jsulm

                          @Kushan Are you accessing list elements using [] anywhere in your code like

                          QList<QString> list;
                          qDebug() <<list[0];
                          

                          ?

                          K Offline
                          K Offline
                          Kushan
                          wrote on last edited by
                          #21

                          @jsulm yes :( But the problem is that I have never declared a specific size but only used size() method in for loops!

                          1 Reply Last reply
                          0
                          • jsulmJ jsulm

                            @Kushan Are you accessing list elements using [] anywhere in your code like

                            QList<QString> list;
                            qDebug() <<list[0];
                            

                            ?

                            K Offline
                            K Offline
                            Kushan
                            wrote on last edited by
                            #22

                            @jsulm Got it solved it was in the textfile that I used to read into the QList because the value I gave is more than the number of elements in the text file that I read!

                            1 Reply Last reply
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