mapOr

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

Unwraps the Ok value using the transform function, or returns the fallback value if the result is an Err.

Example

data-first

await ResultAsync.mapOr(ok(5), (x) => x * 2, 0);
// 10

await ResultAsync.mapOr(err("fail"), (x) => x * 2, 0);
// 0

data-last

await pipe(
    ok(5),
    ResultAsync.mapOr((x) => x * 2, 0),
);
// 10