Function or

or<E, T>(
resB: Result.Result<E, T>,
): <F>(resA: Result.Result<F, T>) => Result.Result<E, T>

Returns resB if resA is an Err, otherwise returns the success resA. The order of arguments is reversed because of that it is useful for partial applying.

Type Parameters

Parameters

resB: Result.Result<E, T>
The second result.

Returns <F>(resA: Result.Result<F, T>) => Result.Result<E, T>

resA or resB.

Examples

Example

const success = ok<number>(2);
const failure = err<string>("not a 2");
const lateError = err<string>("late error");
const earlyError = err<string>("early error");
const anotherSuccess = ok<number>(100);

expect(or<string, number>(lateError)(success)).toStrictEqual(success);
expect(or<string, number>(success)(earlyError)).toStrictEqual(success);
expect(or(lateError)(failure)).toStrictEqual(lateError);
expect(or(anotherSuccess)(success)).toStrictEqual(success);