@thi.ng/compose/promisify.d.ts

Optimized functional composition helpers

import type { Fn, Fn2 } from "@thi.ng/api";
/**
 * Takes a function accepting a NodeJS-like callback w/ (error, result)
 * args and converts it into a Promise, e.g. for use in async contexts.
 *
 * @remarks
 * The constructed promise calls the given function with a custom
 * callback, which then either resolves or rejects the promise.
 *
 * @example
 * ```ts tangle:../export/promisify.ts
 * import { promisify } from "@thi.ng/compose";
 *
 * (async () => {
 *    const body = await promisify(partial(fs.readFile, "foo.txt"));
 *    console.log(body.toString());
 * })();
 * ```
 *
 * @param fn - function accepting a callback
 */
export declare const promisify: <T>(fn: Fn<Fn2<any, T, void>, void>) => Promise<T>;
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