JS Bin // source http://jsbin.com/tuqihev

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

Queue.prototype.enqueue = function (value) {
  if (this.storage.length === 0) {
    this.storage = value
  } else {
    this.storage = value + '***' + this.storage
  }
}

Queue.prototype.dequeue = function () {
  const items = this.storage.split('***')
  const value = items.pop()

this.storage = items.join('***')
  return value
}

Queue.prototype.size = function () {
  return this.storage.split('***').length
}

const myQueue = new Queue()

myQueue.enqueue('January')
console.log(myQueue.storage)
myQueue.enqueue('February')
console.log(myQueue.storage)
myQueue.enqueue('March')
console.log(myQueue.storage)
console.log(myQueue.dequeue())
console.log(myQueue.storage)
console.log(myQueue.dequeue())
console.log(myQueue.storage)
</script>

Queue.prototype.enqueue = function (value) {
  if (this.storage.length === 0) {
    this.storage = value
  } else {
    this.storage = value + '***' + this.storage
  }
}

Queue.prototype.dequeue = function () {
  const items = this.storage.split('***')
  const value = items.pop()

this.storage = items.join('***')
  return value
}

Queue.prototype.size = function () {
  return this.storage.split('***').length
}

const myQueue = new Queue()