title: parseInt(null) == parseInt(null) is false?
body: <pre><code>parseInt(null) == parseInt(null) 
  </code></pre>
  
  <p>returns false. </p>
  
  <p>Why? Shouldn't NaN be equal to NaN? </p>
  
  <p>How exactly is NaN implemented in the javascript engine for this to be possible?</p>