Zips" three iterators of equal length into one iterator of
  three-tuples, where the first element of each tuple is taken from
  the first iterator, the second element is taken from the
  corresponding element in the second iterator, and the third element
  is taken from the corresponding element in the third iterator.</p>

<h3 class="function"><a name="zipwith-3">zipwith/3</a></h3>
<div class="spec">
<p><tt>zipwith(Combine, Iterator1, Iterator2) -&gt; Iterator3</tt>
<ul class="definitions"><li><tt>Combine 