title: Naming scheme for helper functions in Scala
body: <p>In Haskell, when I need a quick worker function or helper value, I usually use prime (<code>'</code>) that is widely used in mathematics. For instance, if I were to write a <code>reverse</code> function and needed a tail-recursive worker, I would name it <code>reverse'</code>.</p>
  
  <p>In Scala, function names can't contain a <code>'</code>. Is there any commonly accepted naming scheme for helper functions and values in Scala?</p>