Method shift

lib/internal/streams/iter/ringbuffer.js:59–66

* Remove and return the item at the head. O(1). * @returns {any}

()

   * @returns {any}
   */
  shift() {
    if (this.#size === 0) return undefined;
    const item = this.#backing[this.#head];
    this.#backing[this.#head] = undefined; // Help GC
    this.#head = (this.#head + 1) & this.#mask;
    this.#size--;
    return item;
  }

  /**
   * Read item at a logical index (0 = head). O(1).