javascript - Find td with specific text, and operate on the td right after that one?

Question

I'm not very familiar with jQuery selectors, so would like some help.

I have a table like this:

<table class="test">
  <tr>
    <td>Section Heading 1</td><td>Section Text 1</td>
  </tr>
  <tr>
    <td>Section Heading 2</td><td>Section Text 2</td>
  </tr>
  <tr>
    <td>Section Heading 3</td><td>Section Text 3</td>
  </tr>
  <tr>
    <td>Section Heading 4</td><td>Section Text 4</td>
  </tr>
  <tr>
    <td>Section Heading 5</td><td>Section Text 5</td>
  </tr>
</table>

What I need to do is find the td containing a specific text, and the operate on the text in the td on its right.

For example, say I want to find the td containing the text Section Heading 4, and the concatenate the text contained in the td to it's right, with the text hello, so that Section Text 4 becomes Section Text 4 hello ..

Which jQuery selector(s) can be used for this purpose ?

Answer 1

My initial answer missed the point about updating the text, here is a sample with this included:

$(".test td:contains(Heading 1)")
    .next().text(function(){
        return $(this).text() + " Hello"
    });

I don't believe you can use the append method as I think it only works to add html tags.