Method slice

packages/core/src/entity/Collection.ts:706–725

* Extracts a slice of the collection items starting at position start to end (exclusive) of the collection. * If end is null it returns all elements from start to the end of the collection.

(start = 0, end?: number)

   * If end is null it returns all elements from start to the end of the collection.
   */
  slice(start = 0, end?: number): T[] {
    this.checkInitialized();
    let index = 0;
    end ??= this.#items.size;
    const items: T[] = [];

    for (const item of this.#items) {
      if (index === end) {
        break;
      }

      if (index >= start && index < end) {
        items.push(item);
      }

      index++;
    }

    return items;
  }

  /**
   * Tests for the existence of an element that satisfies the given predicate.