title: How to add a string at the beginning of each line in a file
body: <p>I want to add a specific string at the beginning of each line in a file. So, if I have the below two lines in someFile.txt and want to add a date string 03/06/2012 with pipe-</p>
  <pre><code>Hello|there|john
  Hello|there|joel
  </code></pre>
  <p>I would have-</p>
  <pre><code>03/06/2012|Hello|there|john
  03/06/2012|Hello|there|joel
  </code></pre>
  <p>What would be the most efficient way to achieve this?</p>