title: What does the "?:^" regular expression mean?
body: <p>I am looking at this sub-expression (this is in JavaScript):</p>
  
  <pre><code>(?:^|.....)
  </code></pre>
  
  <p>I know that <strong>?</strong> means "zero or one times" when it follows a character, but not sure what it means in this context.</p>