r is returned.</p>

<h3 class="function"><a name="subtract-2">subtract/2</a></h3>
<div class="spec">
<p><tt>subtract(Iterator1, Iterator2) -&gt; Iterator3</tt>
<ul class="definitions"><li><tt>Iterator1 = <a href="#type-iterator">iterator</a>(Elem)</tt></li><li><tt>Iterator2 = <a href="#type-iterator">iterator()</a></tt></li><li><tt>Iterator3 = <a href="#type-iterator">iterator</a>(Elem)</tt></li></ul></p>
<p> </p>
</div><p><p>
  Returns a new iterator <code>Iterator3</code> that is a copy of <code>Iterator1