External module "transforms/filter"

filter

• filter<T>(f: function): Transform<T>

• Returns a Transform that emits all items for which f returns true.

  Type parameters

  • T

    Type of items emitted by the observable.

  Parameters

  • f: function

    Function called with each emitted item. If it returns true, the item is emitted. Otherwise the item is discarded.

    • • (x: T): boolean

      • Parameters

        • x: T

        Returns boolean

  Returns Transform<T>

  Transform that emits some items from the original observable.