encapsulation

Riffle.js

function Rifle(rounds) {

  var _rounds = rounds
    , _reloadingMechanism;

  function _setRound(roundNumber){
    _rounds = roundNumber;
  }


  // Encapsulation in JS (cool)

  this.fire = function(){
    if(_reloadingMechanism.isReloading()){
      throw new Error("still loading")
    }
    if(_rounds > 0){
      return "fire";
    }else{
      return "click";
    }
  };
}

riffle_client.js

riffle = new Rifle(2);
riffle['_rounds'];
riffle['_setRound'];