Why doesn't QList have a resize() method?

I just noticed that QList doesn't have a resize method, while QVector, for example, has one. Why is this? And is there an equivalent function?

I think reason is because QList doesn't require the element type to have a default constructor. As a result of this, there is no operation where QList ever creates an object it only copies them.

But if you really need to resize a QList (for whatever reason), here's a function that will do it. Note that it's just a convenience function, and it's not written with performance in mind.

template<class T>
void resizeList(QList<T> & list, int newSize) {
    int diff = newSize - list.size();
    T t;
    if (diff > 0) {
        list.reserve(newSize);
        while (diff--) list.append(t);
    } else if (diff < 0) list.erase(list.end() + diff, list.end());
}