/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

0 vote154 views1 answer
Write getter angular
TypeScript
1 vote142 views2 answers
Convert list elements to uppercase python
TypeScript
0 vote147 views2 answers
Ts class
TypeScript
0 vote138 views1 answer
Use sample weights fit model multiclass
TypeScript
4 votes136 views2 answers
How to add a new propety into all documents in mongodb
TypeScript
2 votes160 views1 answer
Check typescript version
TypeScript
1 vote154 views1 answer
Jasmine angular contains expression
TypeScript
0 vote154 views1 answer
What types of Collections/Data structures you have used
TypeScript
0 vote139 views1 answer
Filename requests python
TypeScript
2 votes143 views1 answer
Typescript valueof object
TypeScript