title: Pattern Match At Specific Location For Validation
body: <p>With these data examples:   </p>
  
  <pre><code>/test -test/test/2016/April 
  /test -test/test/2016
  </code></pre>
  
  <p>How does one pattern match so that it can determine whether or not the number 2016 is located in this exact position? </p>