Function isErr

isErr<T, E>(result: ResultType<T, E>): result is Err<E>
Type guard narrowing a Result to Err.
Type Parameters
- T
- E
Parameters
- result: ResultType<T, E>
Returns result is Err<E>
Example
```
if (isErr(result)) logger.error(result.error)
```
- Defined in result/unwrap.ts:17