title: a && b && c VS if - What's the difference on performance?
body: <p>Just saw a line of code: <code>a &amp;&amp; b &amp;&amp; c</code>. I think this should be equivalent to <code>if(a &amp;&amp; b) {c}</code>. But I'm really curious that is there any performance difference on these code, or it's just simply cool to put it in one line?</p>
  
  <p>This is actual code: <code>sourcesPanel &amp;&amp; sourcesPanel.tips &amp;&amp; sourcesPanel.tips.clearTimers()</code></p>
  
  <p>The <code>sourcesPanel</code> and <code>sourcesPanel.tips</code> are two objects in the program.
  Basically, I think it's checking if those two objects exist, it they exist, call that <code>clearTimers</code> function.</p>