Private methods in JS

gistfile1.js

var myObj = (function() {
      function myObj(something) {
        this.something = something;
      }
      
      function privateMethod() {
        console.log("private method called");
      }
      
      myObj.prototype.publicMethod = function() {
        privateMethod();
      };
      
      return myObj;
})();

new myObj().publicMethod(); // yeah!