title: How do I create a unique connection on a Qt connect?
body: <p>I am creating a timer, so I can call a function periodically, I use the function connect to make the connection between the timer and the function. The code follows:</p>
  <pre><code>  QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(DevicesScanner::scanUpdate()));
    timer-&gt;start(1000);
  </code></pre>
  <p>My question is: How do I make this connection unique, so the timer is not created multiple times?</p>