title: How/why does this javascript code print 'fun'?
body: <pre><code>alert(
      (![]+[])[[]-[]]+
      (([]+[])+([][[]]))[[]-[]]+
      (([]+[])+([][[]]))[!![]-[]]
  );
  </code></pre>
  
  <p>Heres' the fiddle: <a href="http://jsfiddle.net/leeny/6VugZ/" rel="noreferrer">http://jsfiddle.net/leeny/6VugZ/</a></p>
  
  <p>How exactly is this cryptic piece of code working? </p>