@thi.ng/rstream/transduce.d.ts

Reactive streams & subscription primitives for constructing dataflow graphs / pipelines

import type { Reducer, Transducer } from "@thi.ng/transducers";
import type { Subscription } from "./subscription.js";
/**
 * Returns a promise which subscribes to given input and transforms
 * incoming values using given transducer `xform` and reducer `rfn`.
 *
 * @remarks
 * Once the input or the reducer is done, the promise will resolve with
 * the final reduced result (or fail with error).
 *
 * @example
 * ```ts tangle:../export/transduce.ts
 * import { fromIterable, transduce } from "@thi.ng/rstream";
 * import { add, map, range } from "@thi.ng/transducers";
 *
 * transduce(
 *   fromIterable(range(10)),
 *   map((x) => x * 10),
 *   add()
 * ).then((x) => console.log("result", x))
 *
 * // result 450
 * ```
 *
 * @param src -
 * @param xform -
 * @param rfn -
 * @param init -
 */
export declare const transduce: <A, B, C>(src: Subscription<any, A>, xform: Transducer<A, B>, rfn: Reducer<B, C>, init?: C) => Promise<C>;
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