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mapOrElse ​

ts
function Result.mapOrElse(
    result: Result<T, E>,
    transform: (value: T) => U,
    orElse: (error: E) => F
): U | F

Unwraps the Ok value using the transform function, or transforms the Err value using the orElse function.

Example ​

ts
Result.mapOrElse(
    ok(5),
    (x) => x * 2,
    (e) => `Error: ${e}`,
);
// 10

Result.mapOrElse(
    err("fail"),
    (x) => x * 2,
    (e) => `Error: ${e}`,
);
// "Error: fail"
ts
pipe(
    ok(5),
    Result.mapOrElse(
        (x) => x * 2,
        (e) => `Error: ${e}`,
    ),
);
// 10