Function unwrapAsyncOrElse

unwrapAsyncOrElse<T, E = Error>(
resultAsync: ResultAsync<T, E>,
fallbackFn: (err: E) => T,
): Promise<T>
Unwraps a ResultAsync, computing a fallback value from the error when needed.
Type Parameters
- T
  The type of the value.
- E = Error
  The type of the error.
Parameters
- resultAsync: ResultAsync<T, E>
  The ResultAsync to unwrap.
- fallbackFn: (err: E) => T
  A function that receives the error and returns a fallback value.
Returns Promise<T>
A promise that resolves to the unwrapped value or the computed fallback.
Example
```
const value = await unwrapAsyncOrElse(Promise.resolve(ok(42)), () => 0);
console.log(value); // 42
```
Example
```
const value = await unwrapAsyncOrElse(
  Promise.resolve(err(new Error("Oops"))),
  (error) => error.message.length,
);
console.log(value); // 4
```
- Defined in async.ts:144