title: Return a single key from a Hash?
body: <p>I would like to know how to return a specific key from a Hash? </p>
  
  <p>Example:</p>
  
  <pre><code>moves = Hash["Kick", 100, "Punch", 50]
  </code></pre>
  
  <p>How would I return the first key "Kick" from this Hash?</p>
  
  <p>NOTE: I'm aware that the following function will return all keys from the hash but I'm just interested in returning one key. </p>
  
  <pre><code>moves.keys #=&gt; ["Kick", "Punch"]
  </code></pre>