title: A better way of left padding a string with zeroes
body: <p>This is how I left pad a string with zeroes:</p>
  
  <pre><code>String.format("%16s", cardTypeString.trim()).replace(' ', '0');
  </code></pre>
  
  <p>Is there a better way to do this? I don't like the <code>.replace(' ', '0')</code> part.</p>