diff --git a/src/cmlib-example/main.cpp b/src/cmlib-example/main.cpp
index 8165e5b..b297f25 100644
--- a/src/cmlib-example/main.cpp
+++ b/src/cmlib-example/main.cpp
@@ -7,7 +7,7 @@
 
 
 // function args by ref
-int qStringToInt( QString s )
+int qStringToInt( const QString &s )
 {
 	return( s.toInt() );
 }
@@ -20,34 +20,34 @@ int main( int argc, char** argv )
 	// qt-keywords
 	QList< int > il;
 	il << 111 << 222;
-	foreach( int i, il )
+	Q_FOREACH( int i, il )
 	{
 		qDebug() << i;
 	}
 
 	QStringList sl;
 	// string allocations
-	sl << "111" << "222";
+	sl << QStringLiteral("111") << QStringLiteral("222");
 	// loop add ref
-	for ( const auto& s: sl )
+	for ( const auto& s: qAsConst(sl) )
 	{
 		qDebug() << s;
 	}
 
 	// loop qasconst
-	for ( auto s: sl )
+	for ( auto s: qAsConst(sl) )
 	{
 		s.append( "0" );
 	}
 
 	// function args by ref
-	QString s { "100" };
+	QString s { QStringLiteral("100") };
 	auto ir = qStringToInt( s );
 
 	// old style connect
 	QFile f;
 	FileSignalHandler fsh;
-	QObject::connect( &f, SIGNAL(aboutToClose()), &fsh, SLOT(process()) );
+	QObject::connect( &f, &QIODevice::aboutToClose, &fsh, &FileSignalHandler::process );
 
 	return( 0 );
 } // main