Promises.all

promises.ts

// Play it on Typescript Playground: https://www.typescriptlang.org/play/
class Test {
    static process(): Promise<any> {
        let promises = [
            Promise.resolve(1),
            Promise.resolve(2),
            Promise.reject(3),
            Promise.resolve(4),
            new Promise((res, rej) => { throw new Error('Boum'); }),
            Promise.resolve(6),
            new Promise((res, rej) => setTimeout(() => { res(7); }, 1000)),
            Promise.resolve(8),
        ];

        return Promise
            .all(promises.map(p => p
                .then((v: number) => { return { result: v }; })
                .catch((err: any) => { return { error: err }; })
            ))
            .then((values: { result?: number, error?: any }[]) => {
                console.log(values);
            })
            .catch((err: any) => { throw err; });
    }

    static run() {
        console.log('Process started');
        Test.process()
            .then(() => { console.log('Process completed'); });
    }
}

Test.run();