Partitionierung tabellarischer Datenmengen mittels Array-Reduce

export interface InventoryItem {
  id: number;
  name: string;
  status: 'active' | 'archived' | 'pending';
  quantity: number;
}
 
export type InventoryPartition = Record<InventoryItem['status'], InventoryItem[]>;
 
export function partitionInventory(items: InventoryItem[]): InventoryPartition {
  return items.reduce<InventoryPartition>(
    (accumulator, currentItem) => {
      const { status } = currentItem;
 
      if (!accumulator[status]) {
        accumulator[status] = [];
      }
 
      accumulator[status].push(currentItem);
      return accumulator;
    },
    { active: [], archived: [], pending: [] }
  );
}