title: Scala Map fold instead of find
body: <p>Trying to replace <code>find</code> in <code>Map</code> with <code>fold</code> with no success. 
  I made simple example to not dive into details of my types. 
  How to replace it with <code>fold</code>?</p>
  
  <pre><code>val s: Map[String, Int] = Map("1" -&gt; 1, "2" -&gt; 0, "3" -&gt; 1)
  
  s.find(_._2 == 0) match {
    case Some((_, 0)) =&gt; "F"
    case _ =&gt; "T"
  }
  </code></pre>