title: Javascript === (triple equals)
body: <p>Give the following snippet</p>
  
  <pre><code>function countZeroes(array) {
    function counter(total, element) {
      return total + (element === 0 ? 1 : 0);
    }
    return reduce(counter, 0, array);
  }
  </code></pre>
  
  <ol>
  <li>What does the === do?  </li>
  <li>Is <code>reduce</code> a built in function? What does it do? </li>
  <li>Please explain the steps of this program. </li>
  </ol>