Method delete

packages/core/src/lib/list-unit.ts:268–287

* Deletes items at given indices in the list-value. \ * Dispatches a new copy of the value, without mutating the current-value. \ * It doesn't modify the length of the list as these indices are only deleted, not removed. * * It only works if the Unit is not frozen, and * the l

(...indices: number[])

   * @category Custom ListUnit
   */
  delete(...indices: number[]): Item[] {
    indices = sanitizeIndices(indices, this.length).filter(i => this.hasOwnProperty(i));

    if (this.isFrozen || indices.length === 0 || this.isEmpty) {
      return [];
    }

    const deletedItems = [];
    const listShallowCopy = [...this.rawValue()];
    indices.forEach(index => {
      deletedItems.push(this.deepCopyMaybe(listShallowCopy[index]));
      delete listShallowCopy[index];
    });
    this.updateValueAndCache(listShallowCopy);

    if (this.eventsSubject?.observers.length && !this.isMuted) {
      this.eventsSubject.next(new EventListUnitDelete(indices, deletedItems));
    }
    return deletedItems;
  }

  /**
   * Deletes items from the list-{@link value} where the predicate returns `true`. \