title: What's the best way to inverse sort in scala?
body: <p>What is the best way to do an inverse sort in scala?  I imagine the following is somewhat slow.</p>
  
  <pre><code>list.sortBy(_.size).reverse
  </code></pre>
  
  <p>Is there a conveinient way of using sortBy but getting a reverse sort?  I would rather not need to use <code>sortWith</code>.</p>