title: Add a new line to a text file in Spark
body: <p>I have read a text file in Spark using the command</p>
  
  <pre><code>val data = sc.textFile("/path/to/my/file/part-0000[0-4]")
  </code></pre>
  
  <p>I would like to add a new line as a header of my file. Is there a way to do that without turning the RDD into an Array?</p>
  
  <p>Thank you!</p>