title: Mule MEL to do substring on a flow variable
body: <p>I have a variable my_variable with value as a dynamic URL like --</p>
  
  <pre><code>http://stackoverflow.com/questions/ask
  </code></pre>
  
  <p>I want to do a substring on this dynamic URL to find the string after last "/" i.e. in case above mentioned URL, I want to get the substring "ask"</p>
  
  <p>How can I use MEL to do that?</p>