title: How to create public and private members?
body: <p>I'm a bit confused, how can I create public and private members.</p>
  
  <p>My code template so far is like:</p>
  
  <pre><code>(function()){
     var _blah = 1;
  
     someFunction = function() {
       alert(_blah);
     };
  
     someOtherFunction = function() {
       someFunction();
     }
  }();
  </code></pre>