Convert QVariantList to QList<Type> list

ikim

@mcosta thanks for your time, I think you may be right :)

MayEnjoy

@SGaist yes I could compare each QVariant in the list but that would mean iterating over the entire list to determine if the item exists in the second list. Is that my only option ?

Thanks

I think @mclark 's answer is the better one.

SGaist

You can also implement qHash for the type you need to support and thus it will be used automatically in all your software.

#include <QtDebug>

inline uint qHash(const QVariant &key, uint seed = 0)
{
    switch (key.userType()) {
        case QVariant::Int:
            return qHash(key.toInt(), seed);

        case QVariant::UInt:
            return qHash(key.toUInt(), seed);

       // add all cases you want to support;

    }

    return 0;
}

int main( int argc, char * argv[] )
{
    QApplication app( argc, argv );
    QVariantList vl1;
    QVariantList vl2;

    for (int i = 0 ; i < 5 ; ++i) {
        vl1 << i;
    }

    for (int i = 0 ; i < 3 ; ++i) {
        vl2 << i;
    }

    qDebug() << (vl1.toSet() & vl2.toSet());

    return 0;
}