title: Better way to generate array of all letters in the alphabet
body: <p>Right now I'm doing</p>
  
  <pre><code>for (char c = 'a'; c &lt;= 'z'; c++) {
      alphabet[c - 'a'] = c;
  }
  </code></pre>
  
  <p>but is there a better way to do it? Similar to Scala's <code>'a' to 'z'</code></p>