how to get full descendant hiearchy?
<p>given a parent, how can i get its descendants so that their hiearchy is kept.</p>

<pre><code>parent &gt; des1 &gt; des2 &gt; des3
</code></pre>

<p><code>parent.find('*')</code> simply returns not in order. it gives</p>

<pre><code>find('des1, des2. des3')
</code></pre>

<p>what i expect was</p>

<pre><code>find('des1 des2 des3')
</code></pre>
