title: options_for_select in HAML
body: <p>The options_for_select form helper in Rails builds a drop-down list collection with a pre-selected value like this:</p>
  
  <pre><code>&lt;%= options_for_select([['Lisbon', 1], ['Madrid', 2], ...], 2) %&gt;
  </code></pre>
  
  <p>What's the equivalent in HAML?</p>