/TypeScript/Typescript returntype remove promise

Typescript returntype remove promise

type UnPromisifiedObject<T> = {[k in keyof T]: UnPromisify<T[k]>}
type UnPromisify<T> = T extends Promise<infer U> ? U : T;

async function promise_props<T extends {[key: string]: Promise<any>}>(obj: T): Promise<UnPromisifiedObject<T>> {
    const keys = Object.keys(obj);
    const awaitables = keys.map(key => obj[key]);

    const values = await Promise.all(awaitables);
    const result = {} as any;

    keys.forEach((key, i) => {
        result[key] = values[i];
    });
    return result as UnPromisifiedObject<T>;
}

async function main() {
    const x = {
        company: Promise.resolve("company"),
        page: Promise.resolve(1)
    };
    const res = await promise_props(x);
    const company = res.company;  // company is a string here
    const page = res.page;        // page is a number here
}

Source: stackoverflow.com

Similar codes

20 votes315 views5 answers
Flatten a list of lists python
TypeScript
0 vote324 views1 answer
Task :app:bundleReleaseJsAndAssets FAILED
TypeScript
0 vote295 views1 answer
Peer of typescript@>=2.8.0
TypeScript
7 votes327 views4 answers
View tar.gz contents without extracting
TypeScript
38 votes381 views10 answers
Calculator
TypeScript
0 vote328 views1 answer
There are 7 components with misconfigured ETags
TypeScript
1 vote338 views1 answer
Angular conditional pipe
TypeScript
0 vote305 views1 answer
How to get the sheets no in excel package workbook in c#
TypeScript
0 vote341 views1 answer
Write getter angular
TypeScript
0 vote353 views1 answer
Typescript add days to date
TypeScript