Method peekFirst

Data-Structures/Queue/Queue.js:69–75

* @description - Return the item at the front of the queue * @returns {*}

()

   * @returns {*}
   */
  peekFirst() {
    if (this.isEmpty()) {
      throw new Error('Queue is Empty')
    }

    return this.head.data
  }

  /**
   * @description - Return the item at the tail of the queue