Variable fromReadonly

Type declaration

• • <F extends (...args: any[]) => any, E extends unknown = Error>(
        fn: F,
        mapErr?: (err: unknown) => E,
    ): ResultFn<F, E>

  • Wraps a function to return a Result instead of throwing errors.

    Type Parameters

    • F extends (...args: any[]) => any

      The function type.
    • E extends unknown = Error

      The type of the error.

    Parameters

    • fn: F

      The function to wrap.
    • mapErr: (err: unknown) => E = defaultErrorMapper

      A function to map errors to a specific type.

    Returns ResultFn<F, E>

    A function that returns a Result.

    Example

    const safeParse = fromThrowable(JSON.parse);
    
    const [error, data] = safeParse('{"foo": "bar"}');
    if (error) {
      console.error(error.message);
    } else {
      console.log(data);
    }
    Copy