import { AsyncReducer } from "https://deno.land/x/rimbu@1.0.3/common/mod.ts";
const { count } = AsyncReducer;
Returns an AsyncReducer
that remembers the amount of input items provided.
type
{ (): AsyncReducer<never, number>; <T>(pred: (value: T, index: number) => MaybePromise<boolean>): AsyncReducer<T, number>; }