title: Replacing only the nth instance of character
body: <p>Is there a way a can replace the 1st instance of a character in a string with something eg.</p>
  
  <pre><code>^1402 WSN NIAMLAB^teertS htimS 005
  </code></pre>
  
  <p>to be</p>
  
  <pre><code>&amp;1402 WSN NIAMLAB^teertS htimS 005
  </code></pre>
  
  <p>keeping the second ^ in place</p>