title: regex pattern to match the end of a string
body: <p>Can someone tell me the regex pattern to match everything to the right of the last "/" in a string. </p>
  
  <p>For example, str="red/white/blue";</p>
  
  <p>I'd like to match "blue" because it is <em>everything</em> to the right of the last "/".</p>
  
  <p>Many thanks!</p>