//! [0]
        QList<float> list;
        ...
        QListIterator<float> i(list);
        while (i.hasNext())
	    qDebug() << i.next();
//! [0]


//! [1]
        QListIterator<float> i(list);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [1]


//! [2]
        QLinkedList<float> list;
        ...
        QLinkedListIterator<float> i(list);
        while (i.hasNext())
	    qDebug() << i.next();
//! [2]


//! [3]
        QLinkedListIterator<float> i(list);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [3]


//! [4]
        QVector<float> vector;
        ...
        QVectorIterator<float> i(vector);
        while (i.hasNext())
	    qDebug() << i.next();
//! [4]


//! [5]
        QVectorIterator<float> i(vector);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [5]


//! [6]
        QSet<QString> set;
        ...
        QSetIterator<QString> i(set);
        while (i.hasNext())
            qDebug() << i.next();
//! [6]


//! [7]
        QSetIterator<QString> i(set);
        i.toBack();
        while (i.hasPrevious())
            qDebug() << i.previous();
//! [7]


//! [8]
        QList<float> list;
        ...
        QMutableListIterator<float> i(list);
        while (i.hasNext())
	    qDebug() << i.next();
//! [8]


//! [9]
        QMutableListIterator<float> i(list);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [9]


//! [10]
        QMutableListIterator<int> i(list);
        while (i.hasNext()) {
            int val = i.next();
            if (val < 0) {
                i.setValue(-val);
            } else if (val == 0) {
                i.remove();
            }
        }
//! [10]


//! [11]
        QLinkedList<float> list;
        ...
        QMutableLinkedListIterator<float> i(list);
        while (i.hasNext())
	    qDebug() << i.next();
//! [11]


//! [12]
        QMutableLinkedListIterator<float> i(list);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [12]


//! [13]
        QMutableLinkedListIterator<int> i(list);
        while (i.hasNext()) {
            int val = i.next();
            if (val < 0) {
                i.setValue(-val);
            } else if (val == 0) {
                i.remove();
            }
        }
//! [13]


//! [14]
        QVector<float> vector;
        ...
        QMutableVectorIterator<float> i(vector);
        while (i.hasNext())
	    qDebug() << i.next();
//! [14]


//! [15]
        QMutableVectorIterator<float> i(vector);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [15]


//! [16]
        QMutableVectorIterator<int> i(vector);
        while (i.hasNext()) {
            int val = i.next();
            if (val < 0) {
                i.setValue(-val);
            } else if (val == 0) {
                i.remove();
            }
        }
//! [16]


//! [17]
        QSet<float> set;
        ...
        QMutableSetIterator<float> i(set);
        while (i.hasNext())
	    qDebug() << i.next();
//! [17]


//! [18]
        QMutableSetIterator<float> i(set);
        i.toBack();
        while (i.hasPrevious())
	    qDebug() << i.previous();
//! [18]


//! [19]
	QMutableListIterator<int> i(list);
        while (i.hasNext()) {
	    int val = i.next();
            if (val < -32768 || val > 32767)
		i.remove();
        }
//! [19]


//! [20]
	QMutableLinkedListIterator<int> i(list);
        while (i.hasNext()) {
	    int val = i.next();
            if (val < -32768 || val > 32767)
		i.remove();
        }
//! [20]


//! [21]
	QMutableVectorIterator<int> i(vector);
        while (i.hasNext()) {
	    int val = i.next();
            if (val < -32768 || val > 32767)
		i.remove();
        }
//! [21]


//! [22]
	QMutableSetIterator<int> i(set);
        while (i.hasNext()) {
	    int val = i.next();
            if (val < -32768 || val > 32767)
		i.remove();
        }
//! [22]


//! [23]
	QMutableListIterator<double> i(list);
        while (i.hasNext()) {
	    double val = i.next();
            i.setValue(sqrt(val));
        }
//! [23]


//! [24]
	QMutableLinkedListIterator<double> i(list);
        while (i.hasNext()) {
	    double val = i.next();
            i.setValue(sqrt(val));
        }
//! [24]


//! [25]
	QMutableVectorIterator<double> i(list);
        while (i.hasNext()) {
	    double val = i.next();
            i.setValue(sqrt(val));
        }
//! [25]


//! [26]
        QMap<int, QWidget *> map;
        ...
        QMapIterator<QString, QWidget *> i(map);
        while (i.hasNext()) {
	    i.next();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [26]


//! [27]
        QMapIterator<int, QWidget *> i(map);
        i.toBack();
        while (i.hasPrevious()) {
	    i.previous();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [27]


//! [28]
        QMapIterator<int, QWidget *> i(map);
        while (i.findNext(widget)) {
	    qDebug() << "Found widget " << widget << " under key "
		     << i.key();
        }
//! [28]


//! [29]
        QHash<int, QWidget *> hash;
        ...
        QHashIterator<int, QWidget *> i(hash);
        while (i.hasNext()) {
	    i.next();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [29]


//! [30]
        QHashIterator<int, QWidget *> i(hash);
        i.toBack();
        while (i.hasPrevious()) {
	    i.previous();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [30]


//! [31]
        QHashIterator<int, QWidget *> i(hash);
        while (i.findNext(widget)) {
	    qDebug() << "Found widget " << widget << " under key "
		     << i.key();
        }
//! [31]


//! [32]
        QMap<int, QWidget *> map;
        ...
        QMutableMapIterator<int, QWidget *> i(map);
        while (i.hasNext()) {
	    i.next();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [32]


//! [33]
        QMutableMapIterator<int, QWidget *> i(map);
        i.toBack();
        while (i.hasPrevious()) {
	    i.previous();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [33]


//! [34]
        QMutableMapIterator<int, QWidget *> i(map);
        while (i.findNext(widget)) {
	    qDebug() << "Found widget " << widget << " under key "
		     << i.key();
        }
//! [34]


//! [35]
        QMutableMapIterator<QString, QString> i(map);
        while (i.hasNext()) {
            i.next();
            if (i.key() == i.value())
                i.remove();
        }
//! [35]


//! [36]
        QHash<int, QWidget *> hash;
        ...
        QMutableHashIterator<QString, QWidget *> i(hash);
        while (i.hasNext()) {
	    i.next();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [36]


//! [37]
        QMutableHashIterator<int, QWidget *> i(hash);
        i.toBack();
        while (i.hasPrevious()) {
	    i.previous();
	    qDebug() << i.key() << ": " << i.value();
	}
//! [37]


//! [38]
        QMutableHashIterator<int, QWidget *> i(hash);
        while (i.findNext(widget)) {
	    qDebug() << "Found widget " << widget << " under key "
		     << i.key();
        }
//! [38]


//! [39]
        QMutableHashIterator<QString, QString> i(hash);
        while (i.hasNext()) {
            i.next();
            if (i.key() == i.value())
         i.remove();
        }
//! [39]


