title: Regex for if a character exists after the last instance of a character
body: <p>I'm trying to put together a regex that will indicate whether a character exists after the last instance of a character in a string. For example, the regex would return a match if a period '.' appeared after the last instance of a '/'</p>
  <p>So far I am able to find the string combination for the final part of the string after the / using:</p>
  <pre><code>   [^\/]+$
  </code></pre>
  <p>But I am not sure how to only return a match if a period '.' is included in that final string portion. I greatly appreciate any help.</p>
  <p>I realize it would be possible to do this by splitting the string, but I was hoping a pure regex way existed.</p>