why the code doesn't alert Worky-worky?
<pre><code>var a = function() {
  function someSetup(){
    var setup = 'done';
  }
  function actualWork() {
    alert('Worky-worky');
  }
  someSetup();
  return actualWork;
}();
</code></pre>

<p>why the above code doesn't alert Worky-worky?it shows undefined.thank you</p>
