Function err

err<E extends string = string>(label: E, message?: string): ResultErr<E>
Creates a new ResultErr.
Type Parameters
- E extends string = string
Parameters
- label: E
  The error label
- Optionalmessage: string
  Optional error message
Returns ResultErr<E>
A ResultErr
Example
```
const result = err("NOT_FOUND", "The requested resource was not found");
// result: [Err<"NOT_FOUND">, null]
```
- Defined in src/lib/result.ts:120
err<E extends string = string>(err: Err<E>): ResultErr<E>
Creates a ResultErr from an existing Err instance.
Type Parameters
- E extends string = string
Parameters
- err: Err<E>
  An existing Err instance
Returns ResultErr<E>
An error Result
Example
```
const error = new Err("NOT_FOUND", "The requested resource was not found");
const result = err(error);
// result: [Err<"NOT_FOUND">, null]
```
- Defined in src/lib/result.ts:139