Exemplos de QHash::squeeze em C++ (Cpp)

Exemplo n.º 1

Arquivo: tst_qhash.cpp Projeto: husninazer/qt

//sligthly modified from tst_QMap
void tst_QHash::iterators()
{
    QHash<int, QString> hash;
    QMap<int, QString> testMap;
    QString testString="Teststring %1";
    QString testString1;
    int i;

    for(i = 1; i < 100; ++i)
        hash.insert(i, testString.arg(i));

    //to get some chaos in the hash
    hash.squeeze();

    //STL-Style iterators

    QHash<int, QString>::iterator stlIt = hash.begin();
    for(stlIt = hash.begin(), i = 1; stlIt != hash.end(), i < 100; ++stlIt, ++i) {
            testMap.insert(i,stlIt.value());
            //QVERIFY(stlIt.value() == hash.value(
    }
    stlIt = hash.begin();

    QVERIFY(stlIt.value() == testMap.value(1));

    stlIt+=5;
    QVERIFY(stlIt.value() == testMap.value(6));

    stlIt++;
    QVERIFY(stlIt.value() == testMap.value(7));

    stlIt-=3;
    QVERIFY(stlIt.value() == testMap.value(4));

    stlIt--;
    QVERIFY(stlIt.value() == testMap.value(3));

    testMap.clear();

    //STL-Style const-iterators

    QHash<int, QString>::const_iterator cstlIt = hash.constBegin();
    for(cstlIt = hash.constBegin(), i = 1; cstlIt != hash.constEnd(), i < 100; ++cstlIt, ++i) {
            testMap.insert(i,cstlIt.value());
            //QVERIFY(stlIt.value() == hash.value(
    }
    cstlIt = hash.constBegin();

    QVERIFY(cstlIt.value() == testMap.value(1));

    cstlIt+=5;
    QVERIFY(cstlIt.value() == testMap.value(6));

    cstlIt++;
    QVERIFY(cstlIt.value() == testMap.value(7));

    cstlIt-=3;
    QVERIFY(cstlIt.value() == testMap.value(4));

    cstlIt--;
    QVERIFY(cstlIt.value() == testMap.value(3));

    testMap.clear();

    //Java-Style iterators

    QHashIterator<int, QString> javaIt(hash);

    //walk through
    i = 0;
    while(javaIt.hasNext()) {
        ++i;
        javaIt.next();
        testMap.insert(i,javaIt.value());
    }
    javaIt.toFront();
    i = 0;
    while(javaIt.hasNext()) {
        ++i;
        javaIt.next();
        //qDebug(javaIt.value());
        QVERIFY(javaIt.value() == testMap.value(i));
    }

    ++i;
    while(javaIt.hasPrevious()) {
        --i;
        javaIt.previous();
        QVERIFY(javaIt.value() == testMap.value(i));
    }

    /*
        I've removed findNextKey() and findPreviousKey() from the API
        for Qt 4.0 beta 1.
    */

#if 0
    //findPreviousKey()  findNextKey()
    for(i = 1; i < 100; ++i) {
        if(javaIt.findNextKey(i))
            QVERIFY(javaIt.value() == testString.arg(i));
        else {
            QVERIFY(!javaIt.hasNext());
            QVERIFY(javaIt.findPreviousKey(i));
            QVERIFY(javaIt.value() == testString.arg(i));
        }

        if(javaIt.findPreviousKey(i))
            QVERIFY(javaIt.value() == testString.arg(i));
        else {
            QVERIFY(!javaIt.hasPrevious());
            QVERIFY(javaIt.findNextKey(i));
            QVERIFY(javaIt.value() == testString.arg(i));
        }
    }
#endif

    //peekNext()  peekPrevious()
    javaIt.toFront();
    javaIt.next();
    while(javaIt.hasNext()) {
        testString = javaIt.value();
        testString1 = javaIt.peekNext().value();
        javaIt.next();
        //qDebug(testString + "  " + testString1 + "    " + javaIt.peekPrevious().value());
        QVERIFY(javaIt.value() == testString1);
        QCOMPARE(javaIt.peekPrevious().value(), testString1);
    }
    while(javaIt.hasPrevious()) {
        testString = javaIt.value();
        testString1 = javaIt.peekPrevious().value();
        javaIt.previous();
        QVERIFY(javaIt.value() == testString1);
        //qDebug(testString + testString1 + javaIt.peekNext().value());
        QCOMPARE(javaIt.peekNext().value(), testString1);
    }
}