Function is_err

is_err<T, E>(result: Result<T, E>): result is Err<E>
Checks if a Result is an Err type. This is a type guard that narrows the type of result to Err<E>.
Type Parameters
- T
  The type of the successful value.
- E
  The type of the error value.
Parameters
- result: Result<T, E>
  The result to check.
Returns result is Err<E>
true if the result is Err, false otherwise.
- Defined in result.ts:68