title: How Ant can get a value read from a file into a property value?
body: <p>The file looks like:</p>
  
  <pre><code>a1,b1
  a2,b2
  ...
  </code></pre>
  
  <p>I know the value "a2".
  How to get the value "b2" into a property value.</p>
  
  <p>I know how to select line which contains "a2" by:</p>
  
  <pre><code>&lt;linecontains&gt;
    &lt;contains value="a2"/&gt;
  &lt;/linecontains&gt;
  </code></pre>
  
  <p>But <strong>I do not know</strong> how to set a property value to "b2".
  I am at your disposal for more other information.</p>