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Problem with QMap

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qmap
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  • mrjjM mrjj

    @cristiano.narcisi said:

    QMap

    Hi
    can you show the cpp of the constructor also?
    How you add the items.

    Inheriting from Qmap is a bit funky for me as with STL that was normally
    not super idea. but i dont know with QList. :)

    C Offline
    C Offline
    cristiano.narcisi
    wrote on last edited by
    #3

    thanks @mrjj

    here the constructor

    Cst2220ConfigParameterMap::Cst2220ConfigParameterMap( QString mac,
    QString ip,
    QString cst2220_apk_path,
    QString bws_apk_path,
    QString videx_folder_path) : QMap(){

    this->insert(MAC_KEY,mac);
    this->insert(IP_KEY,ip);
    this->insert(CST2220_APK_KEY,cst2220_apk_path);
    this->insert(BWS_APK_KEY,bws_apk_path);
    this->insert(VIDEX_FOLDER_KEY,videx_folder_path);
    

    }

    1 Reply Last reply
    0
    • mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #4

      Ok, it does look perfect valid.

      have you tried
      qDebug() << size(); (in ctor)
      and
      qDebug() << par.size(); (right after u define par)

      C 1 Reply Last reply
      1
      • mrjjM mrjj

        Ok, it does look perfect valid.

        have you tried
        qDebug() << size(); (in ctor)
        and
        qDebug() << par.size(); (right after u define par)

        C Offline
        C Offline
        cristiano.narcisi
        wrote on last edited by
        #5

        Ok. But what does it happen when the function is contains(..key..)?

        mrjjM 1 Reply Last reply
        0
        • C cristiano.narcisi

          Ok. But what does it happen when the function is contains(..key..)?

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #6

          @cristiano.narcisi
          it looks like outside of constructor the key list is no more.
          i wanted to see if it says
          zero for par.

          C 1 Reply Last reply
          1
          • mrjjM mrjj

            @cristiano.narcisi
            it looks like outside of constructor the key list is no more.
            i wanted to see if it says
            zero for par.

            C Offline
            C Offline
            cristiano.narcisi
            wrote on last edited by
            #7

            @mrjj

            Ok but it is very strange. I give you another information: i can view all the key-value pair stored into the par variable using the watches of the editor!!!!

            mrjjM 1 Reply Last reply
            1
            • C cristiano.narcisi

              @mrjj

              Ok but it is very strange. I give you another information: i can view all the key-value pair stored into the par variable using the watches of the editor!!!!

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #8

              @cristiano.narcisi
              OK ?!?! That also pretty strange.

              what about size inside and out?

              C 1 Reply Last reply
              0
              • mrjjM mrjj

                @cristiano.narcisi
                OK ?!?! That also pretty strange.

                what about size inside and out?

                C Offline
                C Offline
                cristiano.narcisi
                wrote on last edited by
                #9

                @mrjj

                Size outside the ctor is correct. It is 5!!!

                mrjjM 1 Reply Last reply
                1
                • C Offline
                  C Offline
                  cristiano.narcisi
                  wrote on last edited by
                  #10

                  Using the iteartor i can view all the values stored in the QMap .... Probably i don't understand something of very important about how QMap acceses the data.
                  //your code here

                   QMap<const char *, QString>::ConstIterator ii;
                   for( ii = par.constBegin(); ii != par.constEnd(); ++ii )
                     qDebug() << ii.key() << " = " << ii.value();```
                  
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                  0
                  • C cristiano.narcisi

                    @mrjj

                    Size outside the ctor is correct. It is 5!!!

                    mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    @cristiano.narcisi
                    ok ?!?

                    I think you should try dump the list using par to see if key corruption
                    else there is no reason contains should not work.

                    C 1 Reply Last reply
                    0
                    • mrjjM mrjj

                      @cristiano.narcisi
                      ok ?!?

                      I think you should try dump the list using par to see if key corruption
                      else there is no reason contains should not work.

                      C Offline
                      C Offline
                      cristiano.narcisi
                      wrote on last edited by
                      #12

                      @mrjj

                      Probably i have understood why i can retry the key. The problem is that i am using

                      QMap< const char *, QString> 
                      

                      This means that the key is a POINTER and not the text !!!

                      I have replaced the QMap template with

                      QMap< QString, QString>
                      

                      Now the key is an ITEM and not a POINTER and i can find all the keys and the value stored within the QMap.

                      Sorry for bothering you

                      Thanks for hepling me

                      Regards

                      Cristiano Narcisi

                      mrjjM 1 Reply Last reply
                      2
                      • mrjjM mrjj

                        @cristiano.narcisi said:

                        QMap

                        Hi
                        can you show the cpp of the constructor also?
                        How you add the items.

                        Inheriting from Qmap is a bit funky for me as with STL that was normally
                        not super idea. but i dont know with QList. :)

                        kshegunovK Offline
                        kshegunovK Offline
                        kshegunov
                        Moderators
                        wrote on last edited by
                        #13

                        @mrjj

                        Inheriting from Qmap is a bit funky

                        It's specially noted in the docs that deriving from a container specialization is not recommended. That's probably what seems funky ;)

                        Read and abide by the Qt Code of Conduct

                        1 Reply Last reply
                        1
                        • C cristiano.narcisi

                          @mrjj

                          Probably i have understood why i can retry the key. The problem is that i am using

                          QMap< const char *, QString> 
                          

                          This means that the key is a POINTER and not the text !!!

                          I have replaced the QMap template with

                          QMap< QString, QString>
                          

                          Now the key is an ITEM and not a POINTER and i can find all the keys and the value stored within the QMap.

                          Sorry for bothering you

                          Thanks for hepling me

                          Regards

                          Cristiano Narcisi

                          mrjjM Offline
                          mrjjM Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on last edited by
                          #14

                          @cristiano.narcisi
                          ok so
                          #define MAC_KEY "mac"
                          used as key did funky stuff?

                          good found :)

                          kshegunovK 1 Reply Last reply
                          0
                          • mrjjM mrjj

                            @cristiano.narcisi
                            ok so
                            #define MAC_KEY "mac"
                            used as key did funky stuff?

                            good found :)

                            kshegunovK Offline
                            kshegunovK Offline
                            kshegunov
                            Moderators
                            wrote on last edited by
                            #15

                            @mrjj said:

                            used as key did funky stuff?

                            The only funky stuff with that macro is that char * doesn't have a meaningful operator <, which is required for it to be a key in the map. The comparison is done as you'd compare integers.

                            Read and abide by the Qt Code of Conduct

                            1 Reply Last reply
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