queue - 3

const superpowerQueue = new Queue()

superpowerQueue.enqueue('invisibility')
superpowerQueue.enqueue('teleportation')
superpowerQueue.enqueue('super-strength')
superpowerQueue.enqueue('flight')

superpowerQueue
      //===> Queue { storage: { '0': 'invisibility', '1': 'teleportation', '2': 'super-strength', '3': 'flight' }, head: 0, tail: 4 }
      
      
      
superpowerQueue.dequeue()
      //===> 'invisibility'
superpowerQueue
      //===> Queue { storage: { '1': 'teleportation', '2': 'super-strength', '3': 'flight'}, head: 1, tail: 4 }



superpowerQueue.peek()
      //===> 'flight'
      
      
      
superpowerQueue.dequeue()
      //===> 'teleportation'
superpowerQueue
      //===> Queue { storage: { '2': 'super-strength', '3': 'flight'}, head: 2, tail: 4 }

superpowerQueue.dequeue()
      //===> 'super-strength'
superpowerQueue
      //===> Queue { storage: { '3': 'flight'}, head: 3, tail: 4 }      
      
superpowerQueue.dequeue()
      //===> 'flight'
superpowerQueue
      //===> Queue { storage: {}, head:4, tail: 4 }  



superpowerQueue.isEmpty()
      //===> false