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//! [0]

QSet<QString> set;

//! [0]

//! [1]

set.insert("one");

set.insert("three");

set.insert("seven");

//! [1]

//! [2]

set << "twelve" << "fifteen" << "nineteen";

//! [2]

//! [3]

if (!set.contains("ninety-nine"))

    ...

//! [3]

//! [4]

QSetIterator<QWidget *> i(set);

while (i.hasNext())

    qDebug() << i.next();

//! [4]

//! [5]

QSet<QWidget *>::const_iterator i = set.constBegin();

while (i != set.constEnd()) {

    qDebug() << *i;

    ++i;

}

//! [5]

//! [6]

QSet<QString> set;

...

foreach (QString value, set)

    qDebug() << value;

//! [6]

//! [7]

QSet<QString> set;

set.reserve(20000);

for (int i = 0; i < 20000; ++i)

    set.insert(values[i]);

//! [7]

//! [8]

QSet<QString> set;

set << "January" << "February" << ... << "December";

QSet<QString>::iterator i;

for (i = set.begin(); i != set.end(); ++i)

    qDebug() << *i;

//! [8]

//! [9]

QSet<QString> set;

set << "January" << "February" << ... << "December";

QSet<QString>::iterator i = set.begin();

while (i != set.end()) {

    if ((*i).startsWith('J')) {

        i = set.erase(i);

    } else {

        ++i;

    }

}

//! [9]

//! [10]

QSet<QString> set;

...

QSet<QString>::iterator it = qFind(set.begin(), set.end(), "Jeanette");

if (it != set.end())

    cout << "Found Jeanette" << endl;

//! [10]

//! [11]

QSet<QString> set;

set << "January" << "February" << ... << "December";

QSet<QString>::const_iterator i;

for (i = set.begin(); i != set.end(); ++i)

    qDebug() << *i;

//! [11]

//! [12]

QSet<QString> set;

...

QSet<QString>::iterator it = qFind(set.begin(), set.end(), "Jeanette");

if (it != set.constEnd())

    cout << "Found Jeanette" << endl;

//! [12]

//! [13]

QSet<QString> set;

set << "red" << "green" << "blue" << ... << "black";

QList<QString> list = set.toList();

qSort(list);

//! [13]

//! [14]

QStringList list;

list << "Julia" << "Mike" << "Mike" << "Julia" << "Julia";

QSet<QString> set = QSet<QString>::fromList(list);

set.contains("Julia");  // returns true

set.contains("Mike");   // returns true

set.size();             // returns 2

//! [14]