javascript-programming/section_d_06_closures.js at master · rails-camp/javascript-programming · GitHub

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function battingAverage () {
  var hits = 100;
  var atBats = 300;

  return {
    getCurrentAverage: function () {
      return (hits/atBats);
    },
    updateHitsAndAtBats: function (hit, atBat) {
      hits += hit;
      atBats += atBat;
    }
  }
}

var altuve = battingAverage();
console.log(altuve.getCurrentAverage());
altuve.updateHitsAndAtBats(0, 20);
console.log(altuve.getCurrentAverage());