examples: port away from Java-style iterators

There's no reason to use them here, the Mutable is misleading in a
few instances, ranged-for is much simpler, and more future-proof.

Change-Id: Ifd5eaae95bbaa0b4cf0f435e6cfee6d778817b44
Reviewed-by: David Faure <david.faure@kdab.com>

examples/opengl/legacy/overpainting/glwidget.cpp

@@ -247,12 +247,8 @@ void GLWidget::createBubbles(int number)
 //! [13]
 void GLWidget::animate()
 {
-    QMutableListIterator<Bubble*> iter(bubbles);
-
-    while (iter.hasNext()) {
-        Bubble *bubble = iter.next();
+    for (Bubble *bubble : qAsConst(bubbles))
         bubble->move(rect());
-    }
     update();
 }
 //! [13]

examples/opengl/qopenglwidget/glwidget.cpp

@@ -399,12 +399,9 @@ void GLWidget::paintGL()
 
     painter.end();
 
-    QMutableListIterator<Bubble*> iter(m_bubbles);
-
-    while (iter.hasNext()) {
-        Bubble *bubble = iter.next();
+    for (Bubble *bubble : qAsConst(m_bubbles))
         bubble->move(rect());
-    }
+
     if (!(m_frames % 100)) {
         m_time.start();
         m_frames = 0;

examples/qtconcurrent/wordcount/main.cpp

@@ -126,11 +126,8 @@ WordCount countWords(const QString &file)
 // at a time.
 void reduce(WordCount &result, const WordCount &w)
 {
-    QMapIterator<QString, int> i(w);
-    while (i.hasNext()) {
-        i.next();
+    for (auto i = w.begin(), end = w.end(); i != end; ++i)
         result[i.key()] += i.value();
-    }
 }
 
 int main(int argc, char** argv)

examples/widgets/tools/i18n/languagechooser.cpp

@@ -163,11 +163,8 @@ QStringList LanguageChooser::findQmFiles()
     QDir dir(":/translations");
     QStringList fileNames = dir.entryList(QStringList("*.qm"), QDir::Files,
                                           QDir::Name);
-    QMutableStringListIterator i(fileNames);
-    while (i.hasNext()) {
-        i.next();
-        i.setValue(dir.filePath(i.value()));
-    }
+    for (QString &fileName : fileNames)
+        fileName = dir.filePath(fileName);
     return fileNames;
 }