A dart library that provides a functional approach to error handling.
Add the following dependencies to your project.
dependencies:
outcome: ^0.0.1import 'package:outcome/outcome.dart';
void main() {
final result = divide(10, 2);
result.fold(
(error) => print('Error is $error'),
(value) => print('Result is $value'),
);
}
/// Returns the result of dividing [a] by [b]. If [b] is 0, returns an [Error].
Either<Error, int> divide(int a, int b) {
if (b == 0) {
return Left(Error.divisionByZero);
} else {
return Right(a ~/ b);
}
}
/// An error that can occur when dividing two numbers.
enum Error {
/// Occurs when the divisor is 0.
divisionByZero,
}