code: function DoublyLinkedList() {
  			this.front = new Node(null, null, null);
  			this.back = new Node(this.front, null, null);
  			this.front.next = this.back;
  			this.length = 0;
  		}
docs: /* js/src/DoublyLinkedList.js 
  Doubly linked list implementation
  making use of dummy nodes for the
  sake of simplicity.