del_empty_dir

Use <code>list.file()</code> to check if there are any files or subdirectories
under a directory. If not, delete this empty directory.

Miscellaneous functions commonly used in other packages maintained by 'Yihui Xie'.

Yihui Xie

<dl><dt>dir</dt>
<dd>Path to a directory. If <code>NULL</code> or the directory does not
exist, no action will be performed.</dd></dl>

<dl>

<dt>dir</dt>
<dd>Path to a directory. If <code>NULL</code> or the directory does not
exist, no action will be performed.</dd>

</dl>