validator function

EskValidator validator(dynamic comparisonFn(dynamic value), dynamic errorFn(dynamic value))

Implementation

EskValidator validator(
  Function(dynamic value) comparisonFn,
  Function(dynamic value) errorFn,
) {
  return EskValidator(
    (value) => EskResult(
      isValid: comparisonFn(value),
      error: errorFn(value),
      value: value,
    ),
  );
}