title: pass argument in index function of controller
body: <p>I have a controller  name 'abc'</p>
  
  <p>Now, I define a index function in it.</p>
  
  <p>Now as i go to <code>www.example.com/abc/</code> or <code>www.example.com/abc/index</code> i can see my page appearing.</p>
  
  <p>Now when i pass argument in that index function i would have to call it as:</p>
  
  <pre><code> www.example.com/abc/index/argument
  </code></pre>
  
  <p><strong>So, How can i call my argument as</strong></p>
  
  <pre><code> www.example.com/abc/argument
  </code></pre>
  
  <p><strong>without treating this 'argument' as public function ?</strong></p>