IReadOnlyObservableCollection.filter

API / IReadOnlyObservableCollection<TItem> / filter method

This method has multiple overloads.

---

Creates a new JavaScript Array containing only the items the satisfy the given collection.

filter<TContext>(
  predicate: (this: TContext, item: TItem, index: number, collection: this) => boolean,
  thisArg?: TContext
): TItem[]

Source reference: src/collections/observableCollections/IReadOnlyObservableCollection.ts:194.

Generic Parameters

• TContext - The context type in which the callback is executed.

Parameters

• predicate: (this:TContext, item:TItem, index:number, collection:this) => boolean
  The callback indicating which items to add in the result Array.

• thisArg: TContext
  A value to use as context when evaluating items.

Returns: TItem[]

A new Array containing the items for which the provided predicate evaluated to true.

See also

• Array.filter

---

Creates a new JavaScript Array containing only the items the satisfy the given collection.

filter<TResult, TContext>(
  predicate: (this: TContext, item: TItem, index: number, collection: this) => item is TResult,
  thisArg?: TContext
): TResult[]

Source reference: src/collections/observableCollections/IReadOnlyObservableCollection.ts:204.

Generic Parameters

• TResult - The type to convert each item to.

• TContext - The context type in which the callback is executed.

Parameters

• predicate: (this:TContext, item:TItem, index:number, collection:this) => item is TResult
  The callback indicating which items to add in the result Array.

• thisArg: TContext
  A value to use as context when evaluating items.

Returns: TResult[]

A new Array containing the items for which the provided predicate evaluated to true.

See also

• Array.filter