title: Extract values from a list of IO actions
body: <p>So I've got something like:</p>
  
  <pre><code>[IO Blah, IO Blah, IO Blah]
  </code></pre>
  
  <p>and I really want just a list of <code>Blah</code>s, how can I do it?</p>
  
  <p>P.S.: Yes, I am working within an IO function.</p>