what does this mean: var _gaq = _gaq || [];
<blockquote>
  <p><strong>Possible Duplicates:</strong><br>
  <a href="http://stackoverflow.com/questions/3088098/in-javascript-what-does-it-mean-when-there-is-a-logical-operator-in-a-variable-d">In Javascript, what does it mean when there is a logical operator in a variable declaration?</a><br>
  <a href="http://stackoverflow.com/questions/2538252/whats-the-javascript-var-gaq-gaq-for">what&rsquo;s the javascript &ldquo;var _gaq = _gaq || []; &rdquo; for ?</a>  </p>
</blockquote>



<p>what does this javascript syntax mean?</p>

<pre><code>var _gaq = _gaq || [];
</code></pre>
