Conditional/dynamic array promise all

dynamic.promise.ts

interface DynamicPromiseResult {
    data: unknown;
    promise: string;
}

const promises: Array<Promise<DynamicPromiseResult>> = []
if (true) { // some logic
   const promise1 = fetch('https://jsonplaceholder.typicode.com/posts/1').then(data => ({ data, promise: 'promise1' }));
   promises.push(promise1);
}
if (false) { // some logic
   const promise2 = fetch('https://jsonplaceholder.typicode.com/posts/2').then(data => ({ data, promise: 'promise2' }));
   promises.push(promise2);
}

const results = await Promise.all(promises)
results.forEach(result => {
    // pattern matching would be lovely here, but JS/TS does not support it yet
    switch (result.promise) {
        case 'promise1':
            doSomething();
            break;
        case 'promise2':
            doSomething2();
            break;
        default:
            throw new Error('Resulting promise not found');
    }
});