title: Why $('input[name="ShowAvatarRdo"][value="true"]') and $('input[name="ShowAvatarRdo"]) are defferent?
body: <p>I use JQuery to get the same element by two ways, <code>$('input[name="ShowAvatarRdo"][value="true"]')</code>  and <code>$('input[name="ShowAvatarRdo"])[0]</code>, 
  Here are the results in the console</p>
  
  <pre><code>$('input[name="ShowAvatarRdo"][value="true"]')
  r.fn.init [input#test, prevObject: r.fn.init(1)]
  $('input[name="ShowAvatarRdo"]')[0]
  &lt;input type=​"radio" name=​"ShowAvatarRdo" id=​"test" value=​"true" checked=​"checked"&gt;​
  </code></pre>
  
  <p>It seems the types of the results are different, why?</p>