Method shift

lib/internal/fixed_queue.js:111–126

()

  }

  shift() {
    const tail = this.tail;
    const next = tail.shift();
    if (tail.isEmpty() && tail.next !== null) {
      // If there is another queue, it forms the new tail.
      this.tail = tail.next;
      tail.next = null;
      tail.bottom = 0;
      tail.top = 0;

      if (FixedQueue.#pool.length < 64) {
        FixedQueue.#pool.push(tail); // Recycle old tail
      }
    }
    return next;
  }
};