sflow/src/parallels.ts

sflow is a powerful and highly-extensible library designed for processing and manipulating streams of data effortlessly. Inspired by the functional programming paradigm, it provides a rich set of utilities for transforming streams, including chunking, fil

import { wseFrom } from "./wse";
import { wseMerges } from "./wseMerges";

export const parallels = <SRCS extends ReadableStream<any>[]>(...srcs: SRCS) =>
  wseMerges()(wseFrom(srcs)) as ReadableStream<
    {
      [key in keyof SRCS]: SRCS[key] extends ReadableStream<infer T>
        ? T
        : never;
    }[number]
  >;