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x/rimbu/stream/async/async-reducer.ts>AsyncReducer.partition

Rimbu is a TypeScript library focused on immutable, performant, and type-safe collections and other tools.
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variable AsyncReducer.partition
import { AsyncReducer } from "https://deno.land/x/rimbu@1.2.1/stream/async/async-reducer.ts";
const { partition } = AsyncReducer;

Returns an AsyncReducer that splits the incoming values into two separate outputs based on the given pred predicate. Values for which the predicate is true are fed into the collectorTrue reducer, and other values are fed into the collectorFalse instance. If no collectors are provided the values are collected into arrays.

type

{ <T, T2 extends T, RT, RF = RT>(pred: (value: T, index: number) => value is T2, options: { collectorTrue: AsyncReducer.Accept<T2, RT>; collectorFalse: AsyncReducer.Accept<Exclude<T, T2>, RF>; }): AsyncReducer<T, [RT, RF]>; <T, T2 extends T>(pred: (value: T, index: number) => value is T2, options?: { collectorTrue?: undefined; collectorFalse?: undefined; }): AsyncReducer<T, [T2[], Exclude<T, T2>[]]>; <T, RT, RF = RT>(pred: (value: T, index: number) => MaybePromise<boolean>, options: { collectorTrue: AsyncReducer.Accept<T, RT>; collectorFalse: AsyncReducer.Accept<T, RF>; }): AsyncReducer<T, [RT, RF]>; <T>(pred: (value: T, index: number) => MaybePromise<boolean>, options?: { collectorTrue?: undefined; collectorFalse?: undefined; }): AsyncReducer<T, [T[], T[]]>; }