Function and

and<U, E>(
resB: Result.Result<E, U>,
): <T>(resA: Result.Result<E, T>) => Result.Result<E, U>

Returns resB if resA is an Ok, otherwise returns the error resA. The order of arguments is reversed because of that it is useful for partial applying.

Type Parameters

Parameters

resB: Result.Result<E, U>
The second result.

Returns <T>(resA: Result.Result<E, T>) => Result.Result<E, U>

resB if resA is a Ok.

Examples

Example

const success = ok<number>(2);
const failure = err("not a 2");
const lateError = err("late error");
const earlyError = err("early error");
const anotherSuccess = ok("different result");

expect(and(lateError)(success)).toStrictEqual(lateError);
expect(and<number, string>(success)(earlyError)).toStrictEqual(earlyError);
expect(and(lateError)(failure)).toStrictEqual(failure);
expect(and(anotherSuccess)(success)).toStrictEqual(anotherSuccess);