shortcut-manager2.ts

  /**
   * Generates cartesian product of given iterables.
   */
  private* cartesianIterator(items: string[][]): Generator<string[]> {
    const remainder = items.length > 1 ? this.cartesianIterator(items.slice(1)) : [[]];
    for (const r of remainder) {
      for (const h of items.at(0)!) {
        yield [h, ...r];
      }
    }
  }