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Changing QStringList with number to another QStringList

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  • S Offline
    S Offline
    samdol
    wrote on last edited by samdol
    #1

    Hi,
    I have a QStringList which has
    winter1.jpg
    winter2.jpg
    winter3.jpg
    ...
    winter999.jpg
    I need to changed this to another QStringList which has
    winter001.jpg
    winter002.jpg
    winter003.jpg
    ...
    winter999.jpg
    How can I change it in Qt?

    J.HilkJ 1 Reply Last reply
    0
    • JohanSoloJ Offline
      JohanSoloJ Offline
      JohanSolo
      wrote on last edited by
      #2

      I'll go with a foreach and a regular expression.
      Or with a lambda function and a std::transform.

      `They did not know it was impossible, so they did it.'
      -- Mark Twain

      1 Reply Last reply
      2
      • S samdol

        Hi,
        I have a QStringList which has
        winter1.jpg
        winter2.jpg
        winter3.jpg
        ...
        winter999.jpg
        I need to changed this to another QStringList which has
        winter001.jpg
        winter002.jpg
        winter003.jpg
        ...
        winter999.jpg
        How can I change it in Qt?

        J.HilkJ Offline
        J.HilkJ Offline
        J.Hilk
        Moderators
        wrote on last edited by
        #3

        @samdol

        Really depends on how universal your transformation has to be.

        In the case you describe, I would probably do something like this:

        QString addZeros(QString s, int size = 3){
             while(s.size() < size)
                 s.insert(0,'0');
             return s;
        }
        ....
        
        for(QString sEntry : myStringList){
            QString replaceString;
            for(int i = 0; i< sEntry.size(); 
                 if(sEntry.at(i) >= QChar('0')  &&  sEntry.at(i) <= QChar('9'))
                    replaceString.append(sEntry.at(i));
            }
            sEntry.replace(replaceString, addZeros(replaceString));
        }
        

        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


        Q: What's that?
        A: It's blue light.
        Q: What does it do?
        A: It turns blue.

        S 1 Reply Last reply
        3
        • J.HilkJ J.Hilk

          @samdol

          Really depends on how universal your transformation has to be.

          In the case you describe, I would probably do something like this:

          QString addZeros(QString s, int size = 3){
               while(s.size() < size)
                   s.insert(0,'0');
               return s;
          }
          ....
          
          for(QString sEntry : myStringList){
              QString replaceString;
              for(int i = 0; i< sEntry.size(); 
                   if(sEntry.at(i) >= QChar('0')  &&  sEntry.at(i) <= QChar('9'))
                      replaceString.append(sEntry.at(i));
              }
              sEntry.replace(replaceString, addZeros(replaceString));
          }
          
          S Offline
          S Offline
          samdol
          wrote on last edited by
          #4

          @J.Hilk
          Thank you for your answer. It worked like a charm.

          1 Reply Last reply
          0

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