title: What is /^ and /i in Perl?
body: <p>Recently I downloaded a source (LevBot) and then I see this line:</p>
  
  <pre><code>} elsif($text =~ /^slaps $levbot_nick/i) {
  </code></pre>
  
  <ul>
  <li>But what <code>/^</code> and <code>/i</code> do?</li>
  <li>Why to use they?</li>
  </ul>
  
  <p>I think this is regular expression, I'm right?</p>