title: Regex - Optional Positive Lookbehind
body: <p>I'm trying to match such that all the characters after the last <code>/</code> and before <code>.</code> gets matched.  My current challenge is that <code>.</code> is only sometimes present.  </p>
  
  <p>I have an example here: <a href="https://regex101.com/r/ThWZwX/3" rel="nofollow noreferrer">https://regex101.com/r/ThWZwX/3</a></p>
  
  <p>Where I'm hoping to match the 'match' text in both scenarios.</p>
  
  <p>Thanks, </p>