><tt>Iterator2 = <a href="#type-iterator">iterator</a>(Elem | Value)</tt></li></ul></p>
<p> </p>
</div><p><p>
  Calls <code>Fun(Elem)</code> on successive elements <code>Elem</code> of <code>Iterator1</code>.
  <code>Fun/1</code> must return either a Boolean or a tuple <code>{true, Value}</code>.
  The function returns the iterator of elements for which <code>Fun</code>
  returns a new value, where a value of <code>true</code> is synonymous with
  <code>{true, Elem}</code>.</p>
 
  <p>That is, filtermap beh