Function map_error

map_error<T, E, U>(result: Result<T, E>, apply: (value: E) => U): Result<T, U>
Transforms the error value of a Result using a mapping function. If the result is Err, the apply function is called with its error value, and a new Err result containing the transformed error value is returned. If the result is Ok, it is returned unchanged.
Type Parameters
- T
  The type of the successful value.
- E
  The original type of the error value.
- U
  The new type of the error value after transformation.
Parameters
- result: Result<T, E>
  The result whose error value to map.
- apply: (value: E) => U
  The function to apply to the error value.
Returns Result<T, U>
A new Result with the mapped error value, or the original Ok.
- Defined in result.ts:131