import { Reducer } from "https://deno.land/x/rimbu@1.2.0/core/mod.ts";
const { partition } = Reducer;
Returns a Reducer 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.
Examples
Example 1
Example 1
Stream.of(1, 2, 3).partition((v) => v % 2 === 0)
// => [[2], [1, 3]]
Stream.of<number | string>(1, 'a', 'b', 2)
.partition((v): v is string => typeof v === 'string')
// => [['a', 'b'], [1, 2]]
// return type is: [string[], number[]]
Stream.of(1, 2, 3, 4).partition(
(v) => v % 2 === 0,
{ collectorTrue: Reducer.toJSSet(), collectorFalse: Reducer.sum }
)
// => [Set(2, 4), 4]
type
{ <T, T2 extends T, RT, RF = RT>(pred: (value: T, index: number) => value is T2, options: { collectorTrue: Reducer<T2, RT>; collectorFalse: Reducer<Exclude<T, T2>, RF>; }): Reducer<T, [RT, RF]>; <T, T2 extends T>(pred: (value: T, index: number) => value is T2, options?: { collectorTrue?: undefined; collectorFalse?: undefined; }): Reducer<T, [T2[], Exclude<T, T2>[]]>; <T, RT, RF = RT>(pred: (value: T, index: number) => boolean, options: { collectorTrue: Reducer<T, RT>; collectorFalse: Reducer<T, RF>; }): Reducer<T, [RT, RF]>; <T>(pred: (value: T, index: number) => boolean, options?: { collectorTrue?: undefined; collectorFalse?: undefined; }): Reducer<T, [T[], T[]]>; }