or) -&gt; ok</tt>
<ul class="definitions"><li><tt>IODevice = <a href="/home/john/Local/kernel/doc/file.html#type-io_device">file:io_device()</a></tt></li><li><tt>Iterator = <a href="llists.html#type-iterator">llists:iterator</a>(<a href="/home/john/Local/stdlib/doc/unicode.html#type-chardata">unicode:chardata()</a>)</tt></li></ul></p>
<p> </p>
</div><p><p>
  Fully evaluate <code>Iterator</code> and write the characters returned to the
  file referenced by <code>IODevice</code>.</p>
 
  The iterator will be 