[xquery-talk] xquery 3.1 wishlist

[W.S. Hager]

Hi Micheal,

Agreed, it could be implemented as a user-defined function (although this
particular solution currently throws an error in eXist). However, what
bothers me is that fn:index-of(1,2,[3,4], 3) may lead to unexpected
results, because the array is flattened. I get the impression that
array-specific semantics are sacrificed here, where in other cases they
aren't, and the dividing line is still unclear me.

Thanks,
Wouter

2015-06-26 14:16 GMT+02:00 Michael Kay <mike at saxonica.com>:

> I would think both of these could be implemented as user-defined functions
> but it’s hard to know without seeing a specification: saying you want a
> function called array:index-of() is not very informative unless you explain
> exactly what you want the function to do.
>
> If it’s to behave like fn:index-of() then you can write it as
>
> array:index-of($array, $value) {
>    (1 to array:size($array))[ $array(.) = $value ]
> }
>
> which is hardly a great hardship to write as a user-defined function.
>
>
> Michael Kay
> Saxonica
>
> On 26 Jun 2015, at 12:18, W.S. Hager <wshager at gmail.com> wrote:
>
> Hello,
>
> I've been working with the recent xquery 3.1 implementation in the develop
> branch eXist-db. I encountered some cases that were quite hard to work
> around:
>
> - the lack of array:index-of()
> - the lack of the iterator index in arrayfor-each and related higher-order
> functions
>
> Perhaps someone of the workgroup is available to discuss those cases.
>
> Thanks,
> Wouter
> --
>
> W.S. Hager
> Lagua Web Solutions
> http://lagua.nl
>
>
> --
>
> W.S. Hager
> Lagua Web Solutions
> http://lagua.nl
>
> _______________________________________________
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>
>
>


-- 

W.S. Hager
Lagua Web Solutions
http://lagua.nl
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