IReadOnlyObservableCollection.reduceRight

API / IReadOnlyObservableCollection<TItem> / reduceRight method

This method has multiple overloads.

---

Reduces the collection to a single item iterating the collection from end to start.

reduceRight(
  callback: (previousItem: TItem, currentItem: TItem, currentIndex: number, collection: this) => TItem
): TItem

Source reference: src/collections/observableCollections/IReadOnlyObservableCollection.ts:266.

Parameters

• callback: (previousItem:TItem, currentItem:TItem, currentIndex:number, collection:this) => TItem
  The callback that aggregates two items at a time.

Returns: TItem

Returns a single aggregated item.

See also

• Array.reduceRight

---

Reduces the collection to a single item iterating the collection from end to start.

reduceRight<TResult>(
  callback: (result: TResult, item: TItem, index: number, collection: this) => TResult,
  initialValue: TResult
): TResult

Source reference: src/collections/observableCollections/IReadOnlyObservableCollection.ts:275.

Generic Parameters

• TResult - The result value type to which items are aggregated.

Parameters

• callback: (result:TResult, item:TItem, index:number, collection:this) => TResult
  The callback that aggregates one item and the previous value at a time.

• initialValue: TResult
  The initial value when aggregating the collection.

Returns: TResult

Returns the value containing the aggregated collection.

See also

• Array.reduceRight