andThen

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

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

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

data-last

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