// Javascript Singleton Patter
var mySingleton = (function() {
  var instance;
  function init() {
    function privateMethod() {
      console.log("I am private")
    }
    var privateVariable = "I am also private"
    var privateRandomNumber = Math.random()

    return {
      publicMethod: function () {
        console.log("The public can see me")
      },
      publicProperty: "I am also public",
      getRandomNumber: function () {
        return privateRandomNumber
      }
    }
  }

  return {
    getInstance: function () {
      if (!instance) { instance = init() }
      return instance
    }
  }
})()

const singObj1 = mySingleton.getInstance()
const singObj2 = mySingleton.getInstance()

console.log(singObj1.getRandomNumber())
console.log(singObj2.getRandomNumber())
console.log(singObj2.getRandomNumber())