//! [0]
Q3PtrDict<char> fields; // void* keys, char* values

QLineEdit *le1 = new QLineEdit( this );
le1->setText( "Simpson" );
QLineEdit *le2 = new QLineEdit( this );
le2->setText( "Homer" );
QLineEdit *le3 = new QLineEdit( this );
le3->setText( "45" );

fields.insert( le1, "Surname" );
fields.insert( le2, "Forename" );
fields.insert( le3, "Age" );

Q3PtrDictIterator<char> it( fields );
for( ; it.current(); ++it )
    cout << it.current() << endl;
cout << endl;

if ( fields[le1] ) // Prints "Surname: Simpson"
    cout << fields[le1] << ": " << le1->text() << endl; 
if ( fields[le2] ) // Prints "Forename: Homer"
    cout << fields[le2] << ": " << le2->text() << endl; 

fields.remove( le1 ); // Removes le1 from the dictionary
cout << le1->text() << endl; // Prints "Simpson"
//! [0]


//! [1]
Q3PtrDict<ItemType> dict;
    ...
if ( dict.find( key ) )
    dict.remove( key );
dict.insert( key, item );
//! [1]


//! [2]
Q3PtrDict<char> fields;

QLineEdit *le1 = new QLineEdit( this );
le1->setText( "Simpson" );
QLineEdit *le2 = new QLineEdit( this );
le2->setText( "Homer" );
QLineEdit *le3 = new QLineEdit( this );
le3->setText( "45" );

fields.insert( le1, "Surname" );
fields.insert( le2, "Forename" );
fields.insert( le3, "Age" );

Q3PtrDictIterator<char> it( fields );
for( ; it.current(); ++it ) {
    QLineEdit *le = (QLineEdit)it.currentKey();
    cout << it.current() << ": " << le->text() << endl;
}
cout << endl;

// Output (random order):
//  Forename: Homer
//  Age: 45
//  Surname: Simpson
//! [2]