Function isResultErr

isResultErr<T, E = Error>(result: Result<T, E>): result is Err<E>
Type guard: checks if a result is failed.
Type Parameters
- T
- E = Error
Parameters
- result: Result<T, E>
  The result to check.
Returns result is Err<E>
true if Err, false otherwise.
Example
```
if (isResultErr(result)) {
  console.log(result.error.message);
}
```
- Defined in src/type/result.ts:59