andThen

function ResultAsync.andThen(
    result: AwaitableResult<T, E>,
    transform: (value: T) => AwaitableResult<U, F>
): ResultAsync<U, E | F>

Chains Result-returning operations. If the result is Ok, applies the transform function to its value. If the result is Err, returns the Err unchanged.

Example

data-first

await ResultAsync.andThen(ok(5), (x) => ok(x * 2));
// Ok<number>(10)

await ResultAsync.andThen(err("fail"), (x) => ok(x * 2));
// Err<string>("fail")

data-last

await pipe(
    ok(5),
    ResultAsync.andThen((x) => ok(x * 2)),
);
// Ok<number>(10)