How to save a element of a QList<QString> to variable of QString type

aurquiel

I filled a QList with string but i can't figure out how to pass that string to a QString variable. I know i could fill the list because with the debug i could saw the string of the path of those files.

QList<QString> *list_name=new QList<QString>[list.size()];
    for (int i = 0; i < list.size(); ++i)
    {
        QFileInfo fileInfo_for_path_2 = list.at(i);
        QString route=fileInfo_for_path_2.absoluteFilePath();
        list_name->insert(i,route);
    }

    QString save;
    save=list_name[0];

Getting this error

/home/zen/QT/fisrt/mainwindow.cpp:60: error: no match for ‘operator=’ (operand types are ‘QString’ and ‘QList<QString>’)
save=list_name[0];
^

mostefa

Hi @aurquiel

What about

save = list_name->at(0)

kshegunov

@aurquiel said in How to save a element of a QList<QString> to variable of QString type:

QList<QString> *list_name=new QList<QString>[list.size()];

Don't do that. Create the list as a local variable. The compiler is correct complaining as QList<QString> * which is the type of list_name has no operator = accepting the mentioned arguments.

kshegunov

QList<QList<QString>> list_name;
// ...
QString save = list_name[0]; //< See the problem. list_name[0] is of type QList<QString> there's no known conversion so the compiler gives up here.

mpergand

You declare a pointer to an array of StringList, ex:

QList<QString> *list_name=new QList<QString>[2];  // pointer to 2 StringList
list_name[0]<<"hello1"<<"hello2";
list_name[1]<<"bye1"<<"bye2";

qDebug()<<list_name[0][0];  // print hello1
qDebug()<<list_name[1][1];  // print bye2

I guess is not what you want.
My strong advice: only use pointers in case of absolute necessity !