Function orElse

orElse<F, T, E>(
fn: (error: F) => Result.Result<E, T>,
): (resA: Result.Result<F, T>) => Result.Result<E, T>
Returns fn() if resA is an Err, otherwise returns the success resA. The order of arguments is reversed because of that it is useful for partial applying.
Type Parameters
- F
- T
- E
Parameters
- fn: (error: F) => Result.Result<E, T>
  The second result.
Returns (resA: Result.Result<F, T>) => Result.Result<E, T>
resA or fn().

Examples
Example
```
const sq = orElse((x: number) => ok<number>(x * x));
const residual = orElse((x: number) => err<number>(x));

expect(sq(sq(ok(2)))).toStrictEqual(ok(2));
expect(sq(residual(ok(2)))).toStrictEqual(ok(2));
expect(residual(sq(err(3)))).toStrictEqual(ok(9));
expect(residual(residual(err(3)))).toStrictEqual(err(3));
```
- Defined in src/result.ts:519