title: jQuery retrieve only textboxes that have a non-empty value
body: <p>In jQuery, how do I get only the textboxes that have a non-empty value?</p>
  
  <p>Example:</p>
  
  <pre><code>&lt;input type="text" id="i1" value="" /&gt;
  &lt;input type="text" id="i2" value="bla bla" /&gt;
  &lt;textarea id="i3"&gt;more bla bla&lt;/textarea&gt;
  &lt;input type="text" id="i4" value="" /&gt;
  </code></pre>
  
  <p>How do I write a query that can get me only the inputs i2 and i3? (in one shot, I'm trying to avoid a "for" loop)</p>
  
  <p>Thanks!</p>