Re: XQuery/XPath 3.1: Node List to Node Set ("distinct

Hi,

$nodes/. would re-order them in document order if that matters.

FunctX also has a distinct-nodes function but I doubt that it would be
considered obvious, and I also doubt that it would be as efficient as what you
came up with:

http://www.xqueryfunctions.com/xq/functx_distinct-nodes.html

Hope everyone is having a nice holiday.

Priscilla


From: Eliot Kimber eliot.kimber@xxxxxxxxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, December 28, 2021 2:24 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re:  XQuery/XPath 3.1: Node List to Node Set ("distinct nodes")

Hmph.

That is certainly much more efficient p
 but is not necessarily obvious (at
least not to me).

Thanks!

E.
_____________________________________________
Eliot Kimber
Sr Staff Content Engineer
O: 512 554 9368
M: 512 554 9368
servicenow.com<https://www.servicenow.com>
LinkedIn<https://www.linkedin.com/company/servicenow> |
Twitter<https://twitter.com/servicenow> |
YouTube<https://www.youtube.com/user/servicenowinc> |
Facebook<https://www.facebook.com/servicenow>

From: Martin Honnen martin.honnen@xxxxxx<mailto:martin.honnen@xxxxxx>
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx<mailto:xsl-list-service@xxxxxxxxxxxx
rytech.com>>
Date: Tuesday, December 28, 2021 at 1:15 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx<mailto:xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
<xsl-list@xxxxxxxxxxxxxxxxxxxxxx<mailto:xsl-list@xxxxxxxxxxxxxxxxxxxxxx>>
Subject: Re:  XQuery/XPath 3.1: Node List to Node Set ("distinct nodes")
[External Email]


On 28.12.2021 20:10, Eliot Kimber
eliot.kimber@xxxxxxxxxxxxxx<mailto:eliot.kimber@xxxxxxxxxxxxxx> wrote:
> I couldnbt find an answer in my google and markmail searching so I
> thought Ibd ask here:
>
> Given an arbitrary list of nodes that may contain duplicates, what is
> the most efficient way to reduce the node list to a set?
>
> The solution I came up with is a recursive function:
>
> (:
>
> Get the unique nodes from the supplied sequence
>
> @param nodes The sequence of nodes to evaluate
>
> @return A sequence of nodes such that each node in $nodes exists exactly
> once.
>
> :)
>
> declare function dutils:distinctNodes($nodes as node()*) as node()* {
>
>    dutils:_getDistinctNodes($nodes, ())
>
> };
>
> declare function dutils:_getDistinctNodes($nodes as node()*, $resultList
> as node()*) as node()* {
>
>    if (exists($nodes))
>
>    then
>
>    let $node := head($nodes)
>
>    return dutils:_getDistinctNodes(tail($nodes), ($resultList | $node))
>
>    else $resultList
>
> };
>
> Which works but I feel like Ibm missing some obvious way to do this more
> directly, but Ibm not seeing it.
>
> Am I missing a better solution?

$nodes/.
XSL-List info and archive<http://www.mulberrytech.com/xsl/xsl-list>
EasyUnsubscribe<http://lists.mulberrytech.com/unsub/xsl-list/2716978> (by
email<>)