and

function Result.and(
    a: Result<T, E>,
    b: Result<U, F>
): Result<U, E | F>

Performs a logical AND operation on two results. Returns b if a is Ok, otherwise returns a (which must be an Err).

Example

data-first

Result.and(ok(1), ok("success"));
// Ok<string>("success")

Result.and(err("fail"), ok("success"));
// Err<string>("fail")

Result.and(ok(1), err("fail"));
// Err<string>("fail")

data-last

pipe(ok(1), Result.and(ok("success")));
// Ok<string>("success")