shared - queue

gistfile1.txt

var makeQueue = function() {
  // Hey! Rewrite in the new style. Your code will wind up looking very similar,
  // but try not not reference your old code in writing the new style.

  var instance = {};

  instance.storage = {};
  instance.index = 0;
  instance.pointer = 0;

  instance.enqueue = queueMethods.enqueue;
  instance.dequeue = queueMethods.dequeue;
  instance.size = queueMethods.size;

  return instance;

};

var queueMethods = {
  enqueue: function(value) {
    this.storage[this.index] = value;
    this.index++;
    // return this.storage;
  },

  dequeue: function() {
    if (this.size() > 0) {
      var result = this.storage[this.pointer];
      this.pointer++;
      return result;
    };
  },

  size: function() {
    return this.index - this.pointer;
  }
};