children instead of childs, d'oh! english is even harder than Java :P
On Thu, Mar 24, 2011 at 6:32 PM, Edward Gabriel Moraru <
[email protected]> wrote:
> I would write the idiomatic Java this way:
>
> class XY implements FixedInterface {
>
> public int execute() {
> try {
> int x = getMeAnX();
> int y = getMeAY();
>
> return x + y;
> } catch (NoXException e) {
> throw new RuntimeException(e);
> } catch (NoYException e) {
> throw new RuntimeException(e);
> }
> }
> }
>
> so that the non-exceptional flow is not masked by the treatment of
> exceptions.
> Maybe is a matter of taste, but for me it seems more readable.
> I would use the initial layout only if I had something special to do for
> every exception something like:
>
> class XY implements FixedInterface {
> public int execute() {
> int x;
> try {
> x = getMeAnX();
> } catch (NoXException e) {
> //do something special here
> //some special processing ?
> throw new RuntimeException(e);
> }
> int x1;
> try {
> x1 = getMeAnX();
> } catch (NoXException e) {
> //do something extra-special here
> //extra special processing
> throw new RuntimeException(e);
> }
> int y;
> try {
> y = getMeAY();
> } catch (NoYException e) {
> throw new RuntimeException(e);
> }
> return x + x1 + y;
> }
> }
>
> Regarding the issue of checked exceptions I'd say that all of bad things
> about them stems from IOException and SQLException.
> Those 2 have tormented a lot of programmers and are the poster childs of
> bad checked exception usage.
>
> My 2 cents,
> Edward.
>
> P.S. : This debate sounds a lot like the one about OO and Functional, btw.
> P.P.S. : damn, it's so hard to write code in the GMail editor ;)
>
>
> On Thu, Mar 24, 2011 at 5:54 PM, Ricky Clarkson
> <[email protected]>wrote:
>
>> 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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>
>
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