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Regarding Using QSettings to read INI File

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  • jsulmJ jsulm

    @poojakamshetty Please check documentation: https://doc.qt.io/qt-5/qhash.html "With QHash, the items are arbitrarily ordered". With QMap data is sorted by key.
    Why do you need same order in the container?

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    poojakamshetty
    wrote on last edited by
    #27

    @jsulm yeah understood. Thank you. But I want in the same order in the container because I can access it easily later. But in the same order, I am not getting my output

    JonBJ 1 Reply Last reply
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    • mrjjM mrjj

      @poojakamshetty
      Hi
      The out of order comes from
      QHash<QString, QString>values;
      Is what we call unordered
      You can use QMap instead
      QMap<QString, QString>values;

      and then it should come in the expected order.

      (meh i type too slow :))

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      poojakamshetty
      wrote on last edited by
      #28

      @mrjj I tried this but I am not getting my output as expected order.

      1 Reply Last reply
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      • P poojakamshetty

        @jsulm yeah understood. Thank you. But I want in the same order in the container because I can access it easily later. But in the same order, I am not getting my output

        JonBJ Offline
        JonBJ Offline
        JonB
        wrote on last edited by
        #29

        @poojakamshetty

        But in the same order, I am not getting my output

        I wonder what that means? Have you changed QHash over to QMap? QMap is ordered, but only by key name (i.e. alphabetically). If you retrieve them from the file in a particular order, you will have to use a list/array instead if you wish to retain that particular order.

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        • JonBJ JonB

          @poojakamshetty

          But in the same order, I am not getting my output

          I wonder what that means? Have you changed QHash over to QMap? QMap is ordered, but only by key name (i.e. alphabetically). If you retrieve them from the file in a particular order, you will have to use a list/array instead if you wish to retain that particular order.

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          poojakamshetty
          wrote on last edited by
          #30

          @JonB Got it,thank you. I am getting in alphabetical order when I am using QMap. My Requirement is to get in the order the same as my .ini file. What should I do?

          mrjjM 1 Reply Last reply
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          • P poojakamshetty

            @JonB Got it,thank you. I am getting in alphabetical order when I am using QMap. My Requirement is to get in the order the same as my .ini file. What should I do?

            mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by
            #31

            @poojakamshetty
            hi
            Well store them in a list instead. that will store them as added but you lose
            the ability to lookup by key but maybe thats fine.

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            • mrjjM mrjj

              @poojakamshetty
              hi
              Well store them in a list instead. that will store them as added but you lose
              the ability to lookup by key but maybe thats fine.

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              poojakamshetty
              wrote on last edited by
              #32

              @mrjj Hi,
              If I store them in a list I think I won't get the output as key-value pair right?

              mrjjM 1 Reply Last reply
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              • P poojakamshetty

                @mrjj Hi,
                If I store them in a list I think I won't get the output as key-value pair right?

                mrjjM Offline
                mrjjM Offline
                mrjj
                Lifetime Qt Champion
                wrote on last edited by
                #33

                @poojakamshetty
                Hi
                Not if you only store a string but you could easily just do
                QVector<QPair<QString, QString>> list;
                or a similar structure to store both key and value in the same list.

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                • mrjjM mrjj

                  @poojakamshetty
                  Hi
                  Not if you only store a string but you could easily just do
                  QVector<QPair<QString, QString>> list;
                  or a similar structure to store both key and value in the same list.

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                  poojakamshetty
                  wrote on last edited by
                  #34
                  This post is deleted!
                  1 Reply Last reply
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                  • mrjjM mrjj

                    @poojakamshetty
                    Hi
                    Not if you only store a string but you could easily just do
                    QVector<QPair<QString, QString>> list;
                    or a similar structure to store both key and value in the same list.

                    P Offline
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                    poojakamshetty
                    wrote on last edited by
                    #35

                    @mrjj Hi
                    Okay, Got it Thank you.
                    I have a doubt. In the container, the values can be stored in any order or if they are not in the order as .ini file will that be any problem later?

                    mrjjM JonBJ 2 Replies Last reply
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                    • P poojakamshetty

                      @mrjj Hi
                      Okay, Got it Thank you.
                      I have a doubt. In the container, the values can be stored in any order or if they are not in the order as .ini file will that be any problem later?

                      mrjjM Offline
                      mrjjM Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on last edited by
                      #36

                      @poojakamshetty
                      Hi
                      They will be stored in same order as you add them so if you add them in the order you read them it should be as you want. (same order as in ini file)

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                      • P poojakamshetty

                        @mrjj Hi
                        Okay, Got it Thank you.
                        I have a doubt. In the container, the values can be stored in any order or if they are not in the order as .ini file will that be any problem later?

                        JonBJ Offline
                        JonBJ Offline
                        JonB
                        wrote on last edited by
                        #37

                        @poojakamshetty

                        if they are not in the order as .ini file will that be any problem later?

                        The ini file/QSettings does not care about the order of entries. Only you seem to want this:

                        My Requirement is to get in the order the same as my .ini file.

                        Why do you even need this?

                        1 Reply Last reply
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                        • mrjjM mrjj

                          @poojakamshetty
                          Hi
                          They will be stored in same order as you add them so if you add them in the order you read them it should be as you want. (same order as in ini file)

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                          poojakamshetty
                          wrote on last edited by
                          #38
                          This post is deleted!
                          JonBJ 1 Reply Last reply
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                          • P poojakamshetty

                            This post is deleted!

                            JonBJ Offline
                            JonBJ Offline
                            JonB
                            wrote on last edited by JonB
                            #39

                            @poojakamshetty
                            It helps if you use code tags for posting this here.

                            values.insert(childKey, settings.value(childKey).toString());

                            Don't you mean:

                            QVector<QPair<QString, QString>> values;
                            ...
                            values.insert(i, QPair<QString, QString>(childKey, settings.value(childKey).toString()));
                            

                            ?

                            Define yourself a type for QPair<QString, QString> and this will read easier.

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                            • SGaistS Offline
                              SGaistS Offline
                              SGaist
                              Lifetime Qt Champion
                              wrote on last edited by
                              #40

                              Hi,

                              Since you really want a specific order, wouldn't it be simpler to sort your container after loading it with data ? That way you would be a bit less depending on the storage format.

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                              mrjjM 1 Reply Last reply
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                              • SGaistS SGaist

                                Hi,

                                Since you really want a specific order, wouldn't it be simpler to sort your container after loading it with data ? That way you would be a bit less depending on the storage format.

                                mrjjM Offline
                                mrjjM Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on last edited by mrjj
                                #41

                                @SGaist
                                Hi
                                He wants same order as in the ini file so not sure we can sort it out by sorting ;)
                                Unless you have something magic in mind?

                                SGaistS 1 Reply Last reply
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                                • mrjjM mrjj

                                  @SGaist
                                  Hi
                                  He wants same order as in the ini file so not sure we can sort it out by sorting ;)
                                  Unless you have something magic in mind?

                                  SGaistS Offline
                                  SGaistS Offline
                                  SGaist
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #42

                                  @mrjj said in Regarding Using QSettings to read INI File:

                                  @SGaist
                                  Hi
                                  He wants same order as in the ini file so not sure we can sort it out by sorting ;)
                                  Unless you have something magic in mind?

                                  Nothing magic, but if order is important then maybe sorting the container be a better idea than relying on something that can be modified with a text editor.

                                  Interested in AI ? www.idiap.ch
                                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                  mrjjM 1 Reply Last reply
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                                  • SGaistS SGaist

                                    @mrjj said in Regarding Using QSettings to read INI File:

                                    @SGaist
                                    Hi
                                    He wants same order as in the ini file so not sure we can sort it out by sorting ;)
                                    Unless you have something magic in mind?

                                    Nothing magic, but if order is important then maybe sorting the container be a better idea than relying on something that can be modified with a text editor.

                                    mrjjM Offline
                                    mrjjM Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #43

                                    @SGaist
                                    Absolutely if the order has any logic to it.
                                    Also I'm not sure poster will find QVector easy to access compared to a
                                    map.

                                    1 Reply Last reply
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                                    • JonBJ JonB

                                      @poojakamshetty
                                      It helps if you use code tags for posting this here.

                                      values.insert(childKey, settings.value(childKey).toString());

                                      Don't you mean:

                                      QVector<QPair<QString, QString>> values;
                                      ...
                                      values.insert(i, QPair<QString, QString>(childKey, settings.value(childKey).toString()));
                                      

                                      ?

                                      Define yourself a type for QPair<QString, QString> and this will read easier.

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                                      poojakamshetty
                                      wrote on last edited by
                                      #44

                                      @JonB using this I am getting error.

                                      jsulmJ 1 Reply Last reply
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                                      • P poojakamshetty

                                        @JonB using this I am getting error.

                                        jsulmJ Offline
                                        jsulmJ Offline
                                        jsulm
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #45

                                        @poojakamshetty said in Regarding Using QSettings to read INI File:

                                        I am getting error

                                        Don't you think you should post the actual error?!
                                        Or should we guess what the error is?

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

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                                        • jsulmJ jsulm

                                          @poojakamshetty said in Regarding Using QSettings to read INI File:

                                          I am getting error

                                          Don't you think you should post the actual error?!
                                          Or should we guess what the error is?

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                                          P Offline
                                          poojakamshetty
                                          wrote on last edited by
                                          #46

                                          @jsulm I am sorry, I thought I mentioned error.
                                          main.cpp:29:13: error: no matching member function for call to 'insert'
                                          qvector.h:147:10: note: candidate function not viable: requires 2 arguments, but 1 was provided
                                          qvector.h:148:10: note: candidate function not viable: requires 2 arguments, but 1 was provided
                                          qvector.h:235:21: note: candidate function not viable: requires 2 arguments, but 1 was provided
                                          qvector.h:236:21: note: candidate function not viable: requires 2 arguments, but 1 was provided
                                          qvector.h:149:10: note: candidate function not viable: requires 3 arguments, but 1 was provided
                                          qvector.h:234:14: note: candidate function not viable: requires 3 arguments, but 1 was provided
                                          This is an error.
                                          values.insert(QPair<QString, QString>(childKey, settings.value(childKey).toString()));
                                          At this line, I am getting that error.

                                          jsulmJ 1 Reply Last reply
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