title: what is this jQuery syntax and how is it useful?
body: <p>Once I saw a jQuery selection using something like this</p>
  
  <pre><code>$(".myClass", $(this));
  </code></pre>
  
  <p>Have I got it correct and what exactly does it do?</p>
  
  <p>I can probably just google it if I knew the name, but I don't know what it's called. </p>