You're right, Alexey. I take it all back. Better example needed.
On Thu, Mar 24, 2011 at 2:14 PM, Alexey Zinger <[email protected]>wrote:
> Except that's not how it would be done in Java.
>
> try {
> return getMeAnX() + getMeAY();
>
> }
> catch(NoXException e) {
> throw new RuntimeException(e);
> }
> catch(NoYException e) {
> throw new RuntimeException(e);
> }
>
> Alexey
>
>
> ------------------------------
> *From:* Ricky Clarkson <[email protected]>
> *To:* [email protected]
> *Cc:* Cédric Beust ♔ <[email protected]>; Russel Winder <
> [email protected]>
> *Sent:* Thu, March 24, 2011 11:54:55 AM
>
> *Subject:* Re: [The Java Posse] How to deal with CheckedExceptions
>
> Obviously, suggesting that Maybe/Option is a better solution is equally
>> silly.
>>
>
> It is a better solution, because it doesn't have to affect readability the
> same way. Consider the difference between:
>
> Go (probably incorrect, I don't speak that language):
>
> x, err = getMeAnX()
> if (isError(err))
> return -1, err
> y, err = getMeAY()
> if (isError(err))
> return -2, err
> return x + y
>
> Idiomatic Java:
>
> class XY implements FixedInterface {
> public int execute() {
> int x;
> try {
> x = getMeAnX();
> } catch (NoXException e) {
> throw new RuntimeException(e);
> }
> int y;
> try {
> y = getMeAY();
> } catch (NoYException e) {
> throw new RuntimeException(e);
> }
> return x + y;
> }
> }
>
> Java with Option:
>
> class XPlusY implements FixedInterface {
> public Option<Integer> execute() {
> for (int x: getMeAnX())
> for (int y: getMeAY())
> return Option.some(x + y);
> return Option.none();
> }
> }
>
> Scala, just for fun:
>
> def execute = for (x <- getMeAnX; y <- getMeAY) yield x + y
>
> or
>
> def execute = getMeAnX.bind(x => getMeAY.map(y => x + y))
>
> The line above can be translated to Java fairly mechanically but I'm not
> sure that would add anything to the debate apart from lots of lines.
>
>
>> --
>> Cédric
>>
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>
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