Changing QStringList with number to another QStringList

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?

JohanSolo

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

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));
}

samdol

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