main.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
#include <QtGui>
#include <iostream>
using namespace std;
 
class Widget : public QWidget
{
public:
    Widget(QWidget *parent = nullptr);
};
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    QStringList fonts = { "Arial", "Helvetica", "Times" };
 
    fonts << "Courier" << "Verdana";
 
    QString str = fonts.join(", ");
     // str == "Arial, Helvetica, Times, Courier"
 
    QStringList list;
    list = str.split(',');
     // list: ["Arial", "Helvetica", "Times", "Courier"]
 
    QStringList monospacedFonts = fonts.filter(QRegularExpression("Courier|Fixed"));
 
    QStringList files;
    files << "$QTDIR/src/moc/moc.y"
          << "$QTDIR/src/moc/moc.l"
          << "$QTDIR/include/qconfig.h";
 
    files.replaceInStrings("$QTDIR", "/usr/lib/qt");
    // files: [ "/usr/lib/qt/src/moc/moc.y", ...]
 
    QString str1, str2, str3;
    QStringList longerList = (QStringList() << str1 << str2 << str3);
 
    list.clear();
    list << "Bill Murray" << "John Doe" << "Bill Clinton";
 
    QStringList result;
    result = list.filter("Bill");
    // result: ["Bill Murray", "Bill Clinton"]
 
    result.clear();
    for (const auto &str : std::as_const(list)) {
        if (str.contains("Bill"))
            result += str;
    }
 
    list.clear();
    list << "alpha" << "beta" << "gamma" << "epsilon";
    list.replaceInStrings("a", "o");
    // list == ["olpho", "beto", "gommo", "epsilon"]
 
    list.clear();
    list << "alpha" << "beta" << "gamma" << "epsilon";
    list.replaceInStrings(QRegularExpression("^a"), "o");
    // list == ["olpha", "beta", "gamma", "epsilon"]
 
    list.clear();
    list << "Bill Clinton" << "Murray, Bill";
    list.replaceInStrings(QRegularExpression("^(.*), (.*)$"), "\\2 \\1");
    // list == ["Bill Clinton", "Bill Murray"]
 
    {
    QStringList veryLongList;
    QStringMatcher matcher(u"Straße", Qt::CaseInsensitive);
    QStringList filtered = veryLongList.filter(matcher);
    }
}
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Widget widget;
    widget.show();
    return app.exec();
}