Porting QList iteration to Qt4

From ArkWiki

While porting QtParted from Qt3 to Qt4, I realised that QtParted uses the following QList iteration construct extensively:

QList <ClassName*> objlist;
// populate object list

ClassName* obj = NULL;

for (obj = (ClassName *)objlist.first(); obj; obj = (ClassName *)objlist.next()) {
    //do something with obj
}

Unfortunately in Qt4, QList no longer provides first() and next method. A more direct translation to Qt4 for the above scenario would be:

QList <ClassName*> objlist;
// populate object list

ClassName* obj = NULL;
QListIterator <ClassName*> objiter(objlist);

while(objiter.hasNext())
{
    obj = objiter.next();
    //do something with obj;
}

But I prefer to do the following:

QList <ClassName*> objlist;
// populate object list

foreach (ClassName* obj, objlist) {
    //do something with obj
}

It will work either way and that's all folks. Happy QT!!!

--Deux 03:37, 27 February 2008 (UTC)