 false, otherwise it returns true.<br><br></span>




<!-- Function arguments -->
  <h3>Arguments</h3>
<ul><span class="arg">

    <li>
	  <strong>#1</strong>: A string with the path to a directory, or a vector of files.
    </li> 
    
  
    <li>
	  <strong>#2</strong>: A user-defined function that takes a file name as argument. Note that the name does not include the directory where the file is placed.
    </li> 
    
  
  </span></ul>







<h3>Usage</h3>
<pre class="example"><code><span class="functio