apply

import { apply } from "https://github.gh-proxy.cn/raw.githubusercontent.com/baetheus/fun/main/promise.ts";

Create a new Promise from a Promise<(a: A) => I> and a Promise. Although Promises encapsulate asynchrony, there is no way defer a Promise once created, thus this ap function always evaluates both input Promises in parallel.

@example

import { wrap, apply } from "./promise.ts";
import { pipe } from "./fn.ts";

type Person = { name: string, age: number };

const person = (name: string) => (age: number): Person => ({ name, age });

const result = pipe(
  wrap(person),
  apply(wrap("Brandon")),
  apply(wrap(37)),
); // Promise<Person>

function apply<A>(ua: Promise<A>): (ufai: Promise<(a: A) => I>) => Promise;

apply<A>(ua: Promise<A>): (ufai: Promise<(a: A) => I>) => Promise

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§Type Parameters

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§Parameters

ua: Promise<A>

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§Return Type

(ufai: Promise<(a: A) => I>) => Promise

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