import { AsyncReducer } from "https://deno.land/x/rimbu@0.13.5/core/mod.ts";
const { first } = AsyncReducer;
Returns an AsyncReducer that remembers the first input value.
Examples
Example 1
Example 1
await AsyncStream.from(Stream.range{ amount: 10 })).reduce(AsyncReducer.first())
// => 0
type
{ <T>(): AsyncReducer<T, T | undefined>; <T, O>(otherwise: AsyncOptLazy<O>): AsyncReducer<T, T | O>; }