Javascript objects as JSON

object.js

// object:
function Person(yearsOld) {
  // internal properties
  var _Person
    , age = yearsOld
    , height = 71
    , firstName = "Zack"
    , lastName = "Michener";
    
  // internal methods
  function fullName() {
    return firstName + " " + lastName;
  }
  
  /* public methods and properties,
   * all privileged
   */
  _Person = {
    "gender": "male",
    
    "sayName": function() {
      console.log("Hi, my name is " + fullName());
    },
    
    "isOlder": function(otherAge) {
      return age > otherAge;
    }
    
  };
  
  return _Person;
}

// create one
var me = new Person(22);
me.sayName();
if(me.isOlder(21)) {
  // drink beer
}

console.log(me.age); // undefined - is private