lapse" id="comment-func-flatmap-elementofresult_-escaping-self-elements-element-elementofresult"><div class="p">
    <p>Returns the non-<code>nil</code> results of mapping the given transformation over
this sequence.</p>

<p>Use this method to receive a sequence of nonoptional values when your
transformation produces an optional value.</p>

<p><strong><code>transform</code>:</strong>  A closure that accepts an element of this sequence
  as its argument and returns an optional value.</p>

<p><strong>Complexi