dart_try 0.0.1
dart_try: ^0.0.1 copied to clipboard
The Try control gives us the ability write safe code without focusing on try-catch blocks in the presence of exceptions.
The Try control gives us the ability write safe code without focusing on try-catch blocks in the presence of exceptions.
Before #
void main() {
String? randomWord;
try {
randomWord = getRandomWordFromServer();
} catch (e) {
randomWord = 'fallback';
}
}
With Try #
void main() {
final randomWord = Try.of(() => getRandomWordFromServer()).orElseGet('fallback');
}
Immutability #
With try catch we will have to split initialization and declaration. This forces us to make variables mutable, although they might only get assigned a value once.
Null Safety #
If we use try catch control flow we might have a different Variable type. Below we declare randomWord
to be nullable. Now getRandomWordFromServer
might return String?
as well. We lose our strict null safety.
It's easier to read #
Features #
- Wrap Code that might throw an error with
Try.of(() => doSomething())
- Get result immediately if sure there is no error
- Return alternative the event of an error
- tryable.orElse(() => elseFunction());
- tryable.orElseGet('value')