title: Nice filter form in Scala
body: <p>In Scala, I create a list and then filter it based on a class condition:</p>
  
  <pre><code>val list: List[MyObj] = // fill in with objects that extend MyObj, one of them is class A
  val list2 = list filter ({ case A() =&gt; false case _ =&gt; true })
  </code></pre>
  
  <p>Is it possible to write the above filter in a more concise form?</p>