RxJS custom operators

switchMapBy

function switchMapBy<T, O extends ObservableInput<any>>(property: string, project: (value: T, index: number) => O): OperatorFunction<T, ObservedValueOf<O>>

exhaustMapBy

function exhaustMapBy<T, O extends ObservableInput<any>>(property: string, project: (value: T, index: number) => O): OperatorFunction<T, ObservedValueOf<O>>