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Sourcecode: qt4-x11 version File versions

src.corelib.tools.qmap.cpp

//! [0]
        QMap<QString, int> map;
//! [0]


//! [1]
        map["one"] = 1;
        map["three"] = 3;
        map["seven"] = 7;
//! [1]


//! [2]
        map.insert("twelve", 12);
//! [2]


//! [3]
        int num1 = map["thirteen"];
        int num2 = map.value("thirteen");
//! [3]


//! [4]
        int timeout = 30;
        if (map.contains("TIMEOUT"))
            timeout = map.value("TIMEOUT");
//! [4]


//! [5]
        int timeout = map.value("TIMEOUT", 30);
//! [5]


//! [6]
        // WRONG
        QMap<int, QWidget *> map;
        ...
        for (int i = 0; i < 1000; ++i) {
            if (map[i] == okButton)
                cout << "Found button at index " << i << endl;
        }
//! [6]


//! [7]
        QMapIterator<QString, int> i(map);
        while (i.hasNext()) {
            i.next();
            cout << i.key() << ": " << i.value() << endl;
        }
//! [7]


//! [8]
        QMap<QString, int>::const_iterator i = map.constBegin();
        while (i != map.constEnd()) {
            cout << i.key() << ": " << i.value() << endl;
            ++i;
        }
//! [8]


//! [9]
        map.insert("plenty", 100);
        map.insert("plenty", 2000);
        // map.value("plenty") == 2000
//! [9]


//! [10]
        QList<int> values = map.values("plenty");
        for (int i = 0; i < values.size(); ++i)
            cout << values.at(i) << endl;
//! [10]


//! [11]
        QMap<QString, int>::iterator i = map.find("plenty");
        while (i != map.end() && i.key() == "plenty") {
            cout << i.value() << endl;
            ++i;
        }
//! [11]


//! [12]
        QMap<QString, int> map;
        ...
        foreach (int value, map)
            cout << value << endl;
//! [12]


//! [13]
        #ifndef EMPLOYEE_H
        #define EMPLOYEE_H

        class Employee
        {
        public:
            Employee() {}
            Employee(const QString &name, const QDate &dateOfBirth);
            ...

        private:
            QString myName;
            QDate myDateOfBirth;
        };

        inline bool operator<(const Employee &e1, const Employee &e2)
        {
            if (e1.name() != e2.name())
                return e1.name() < e2.name();
            return e1.dateOfBirth() < e2.dateOfBirth();
        }

        #endif // EMPLOYEE_H
//! [13]


//! [14]
        QMap<QString, int> map;
        ...
        QMap<QString, int>::const_iterator i = map.find("HDR");
        while (i != map.end() && i.key() == "HDR") {
            cout << i.value() << endl;
            ++i;
        }
//! [14]


//! [15]
        QMap<int, QString> map;
        map.insert(1, "one");
        map.insert(5, "five");
        map.insert(10, "ten");

        map.lowerBound(0);      // returns iterator to (1, "one")
        map.lowerBound(1);      // returns iterator to (1, "one")
        map.lowerBound(2);      // returns iterator to (5, "five")
        map.lowerBound(10);     // returns iterator to (10, "ten")
        map.lowerBound(999);    // returns end()
//! [15]


//! [16]
        QMap<QString, int> map;
        ...
        QMap<QString, int>::const_iterator i = map.lowerBound("HDR");
        QMap<QString, int>::const_iterator upperBound = map.upperBound("HDR");
        while (i != upperBound) {
            cout << i.value() << endl;
            ++i;
        }
//! [16]


//! [17]
        QMap<int, QString> map;
        map.insert(1, "one");
        map.insert(5, "five");
        map.insert(10, "ten");

        map.upperBound(0);      // returns iterator to (1, "one")
        map.upperBound(1);      // returns iterator to (5, "five")
        map.upperBound(2);      // returns iterator to (5, "five")
        map.upperBound(10);     // returns end()
        map.upperBound(999);    // returns end()
//! [17]


//! [18]
        QMap<QString, int> map;
        map.insert("January", 1);
        map.insert("February", 2);
        ...
        map.insert("December", 12);

        QMap<QString, int>::iterator i;
        for (i = map.begin(); i != map.end(); ++i)
            cout << i.key() << ": " << i.value() << endl;
//! [18]


//! [19]
        QMap<QString, int>::iterator i;
        for (i = map.begin(); i != map.end(); ++i)
            i.value() += 2;
//! [19]


//! [20]
        QMap<QString, int>::iterator i = map.begin();
        while (i != map.end()) {
            if (i.key().startsWith("_"))
                i = map.erase(i);
            else
                ++i;
        }
//! [20]


//! [21]
        QMap<QString, int>::iterator i = map.begin();
        while (i != map.end()) {
            QMap<QString, int>::iterator prev = i;
            ++i;
            if (prev.key().startsWith("_"))
                map.erase(prev);
        }
//! [21]


//! [22]
        // WRONG
        while (i != map.end()) {
            if (i.key().startsWith("_"))
                map.erase(i);
            ++i;
        }
//! [22]


//! [23]
        if (i.key() == "Hello")
            i.value() = "Bonjour";
//! [23]


//! [24]
        QMap<QString, int> map;
        map.insert("January", 1);
        map.insert("February", 2);
        ...
        map.insert("December", 12);

        QMap<QString, int>::const_iterator i;
        for (i = map.constBegin(); i != map.constEnd(); ++i)
            cout << i.key() << ": " << i.value() << endl;
//! [24]


//! [25]
        QMultiMap<QString, int> map1, map2, map3;

        map1.insert("plenty", 100);
        map1.insert("plenty", 2000);
        // map1.size() == 2

        map2.insert("plenty", 5000);
        // map2.size() == 1

        map3 = map1 + map2;
        // map3.size() == 3
//! [25]


//! [26]
        QList<int> values = map.values("plenty");
        for (int i = 0; i < values.size(); ++i)
            cout << values.at(i) << endl;
//! [26]


//! [27]
        QMultiMap<QString, int>::iterator i = map.find("plenty");
        while (i != map.end() && i.key() == "plenty") {
            cout << i.value() << endl;
            ++i;
        }
//! [27]



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