title: Ruby : How to print out the key and value pair in a hash in the XML format
body: <p>I have a hash which contains several attributes, and I am constantly overriding it with new values for those specific keys. How can I convert the hash into xml, before the next set of values override the hash ?</p>
  
  <p>I tried using the Builder library but I'm getting the error:</p>
  
  <blockquote>
    <p>uninitialized constant <code>Builder::XMLMarkup</code> (<code>NameError</code>)</p>
  </blockquote>