d (preserving the order of the elements). The first  
occurrence of each element is kept.</p>
 
  May require arbitrarily large quantities of memory to track all
  elements seen so far. If only duplicate elements remain, infinite
  iterators will never return.</p>
<p><b>See also:</b> <a href="llists_utils.html#unique-1">llists_utils:unique/1</a>.</p>

<h3 class="function"><a name="uniq-2">uniq/2</a></h3>
<div class="spec">
<p><tt>uniq(Fun, Iterator1) -&gt; Iterator2</tt>
<ul class="definitions"><li><tt>Fun 