Why can't typescript infer tuple return type in RxJs stream?
In your map function, you are returning an array, not tuple.
You can use as const to force the tuple type:
export class AppComponent {
observable$ = from([new MyType('obj1'), new MyType('obj2')]).pipe(
map((value, index) => [value, index] as const),
tap(([value, index]) => console.log(value, index))
).subscribe();
}
See Tuple Types:
array literals with
constassertions will be inferred withreadonlytuple types