title: jquery selector of class who have specific node immediatey after
body: <p>consider the following html:</p>
  
  <pre><code>    &lt;div class="a"&gt; pick me 1&lt;/div&gt;
      &lt;div class="b"&gt; stuff &lt;/div&gt;
      &lt;div class="a"&gt; stuff &lt;/div&gt;
      &lt;div class="a"&gt; stuff &lt;/div&gt;
      &lt;div class="a"&gt; pick me 2&lt;/div&gt;
      &lt;div class="b"&gt; stuff &lt;/div&gt;
      &lt;div class="a"&gt; stuff &lt;/div&gt;
      &lt;div class="c"&gt; stuff &lt;/div&gt;
      &lt;div class="b"&gt; stuff &lt;/div&gt;
  </code></pre>
  
  <p>I'd like to select only the divs which have <code>.a</code> and have <code>.b</code> immediately after, so I'll only get the pick me divs</p>