title: what's the purpose and meaning of e in jquery code
body: <p>In the following code, there are two 'e's, are they about the same object/type or actually about different things? </p>
  
  <pre><code>(function(e) {
    var t = {
      init: function() {
        e(".pic").length &amp;&amp; this.show()
      }
    };
    window.Booth = t;
  })(jQuery);
  </code></pre>
  
  <p>Also, I am a little confused with the overall semantics of the code snippet above, any documentation out there can explain it? </p>