ReadOnlyObservableCollection.findLastIndex

API / ReadOnlyObservableCollection<TItem> / findLastIndex method

Returns the index of the last item for which the provided predicate evaluated to true, if no item can be found then -1 is returned.

This is a public method.

public findLastIndex(predicate: (item: TItem, index: number, collection: IReadOnlyObservableCollection<TItem>) => boolean): number

Parameters

• predicate: Function, the callback performing the item check.

  Parameters:

  • item: TItem, the item being evaluated.
  • index: Number, the index of the item being evaluated.
  • collection: IReadOnlyObservableCollection<TItem>, the collection being iterated.

  Returns: Boolean

  Returns true if the provided item satisfies the condition; false otherwise.

Returns: Number

Returns the index of the last item for which the provided predicate evaluates to true; otherwise -1.

See

• Array.findLastIndex

---

Returns the index of the last item for which the provided predicate evaluated to true, if no item can be found then -1 is returned.

This is a public method.

public findLastIndex<TContext>(predicate: (item: TItem, index: number, collection: IReadOnlyObservableCollection<TItem>) => boolean, thisArg: TContext): number

Template Parameters

• TContext: the context type in which the callback is executed.

Parameters

• predicate: Function, the callback performing the item check.

  Parameters:

  • item: TItem, the item being evaluated.
  • index: Number, the index of the item being evaluated.
  • collection: IReadOnlyObservableCollection<TItem>, the collection being iterated.

  Returns: Boolean

  Returns true if the provided item satisfies the condition; false otherwise.
• thisArg: TContext, a value to use as context when checking items.

Returns: Number

Returns the index of the last item for which the provided predicate evaluates to true; otherwise -1.

See

• Array.findLastIndex