Question

In jQuery, how to select ALL the TR that only has 2 TD inside?
Here’s the sample:

<table>
   <tr>
      <td></td>
   </tr>          
   <tr> /* I only want to select this. */
      <td></td>
      <td></td>
   </tr>
   <tr>
      <td></td>
   </tr>
</table>

Answer 1

You should use the .filter() method to reduce the tr to only those whose children count is 2

$('table tr').filter(function(){
    return $(this).children().length === 2;
});

Demo at http://jsfiddle.net/gaby/xTNcG/