Avoid allocating unneeded containers

krusader/Dialogs/checksumdlg.cpp

@@ -568,7 +568,7 @@ void VerifyWizard::onResultPage()
 bool VerifyWizard::isSupported(const QString &path)
 {
     const QFileInfo fileInfo(path);
-    return fileInfo.isFile() && m_checksumTools.keys().contains(fileInfo.suffix());
+    return fileInfo.isFile() && m_checksumTools.contains(fileInfo.suffix());
 }
 
 } // NAMESPACE CHECKSUM_

krusader/Panel/krlayoutfactory.cpp

@@ -206,9 +206,9 @@ QLayout *KrLayoutFactory::createLayout(QString layoutName)
     }
 
     if(layout) {
-        foreach(const QString &name, widgets.keys()) {
-            qWarning() << "widget" << name << "was not added to the layout";
-            widgets[name]->hide();
+        for (auto it = widgets.constBegin(), end = widgets.constEnd(); it != end; ++it) {
+            qWarning() << "widget" << it.key() << "was not added to the layout";
+            it.value()->hide();
         }
     } else
          qWarning() << "couldn't load layout" << layoutName;

krusader/Panel/listpanelactions.cpp

@@ -154,7 +154,7 @@ void ListPanelActions::activePanelChanged()
 void ListPanelActions::guiUpdated()
 {
     QList<QAction*> actions;
-    foreach(QAction *action, setViewActions.values())
+    for (QAction *action : qAsConst(setViewActions))
         actions << action;
     static_cast<KrMainWindow*>(_mainWindow)->plugActionList("view_actionlist", actions);
 }