title: How do you generate A1-style references in Scala?
body: <p>How do you generate A1-style references in Scala (e.g., A1, B1, C1, A2, B2, C2, etc.).</p>
  
  <p>I can zip together two lists to generate a single vector of tuples:</p>
  
  <pre><code>"ABCDEFG".zip("1234567")
  </code></pre>
  
  <p>generates:</p>
  
  <pre><code>Vector((A,1), (B,2), (C,3), (D,4), (E,5), (F,6), (G,7), (H,8), (I,9))
  </code></pre>
  
  <p>However, attempting to flatten this into a single list of results in the following error.</p>
  
  <pre><code>error: No implicit view available from (Char, Char) =&gt; scala.collection.GenTraversableOnce[B].
  </code></pre>
  
  <p>Aside from resolving the error, it does not really generate the list of A1-style references desired. How do you generate a list of A1-style references in Scala?</p>