Re: [basex-talk] requests concerning the map-module

Hi Rob,

So, my request is to extend the map-key to allow multiple key-values and XML-elements.

General XQuery feature requests should probably go to the W3 Bugzilla tracker [1], as our intention is to stick as closely as possible to the official spec. I remember that the new issues this would bring along have been discussed before, so you may get more helpful feedback on that specific request by writing to the talk@x-query.com mailing list [2].

Hope this helps, Christian

[1] https://www.w3.org/Bugs/Public/ [2] http://x-query.com/mailman/listinfo/talk

Well, now we’re on it; why not allow closures as key-values. In that case we’ve our solution for the previous multiple key value request.

How do you feel about this?

Oh, now we’re on the map-module; an update-function would be great. While processing XML-data one needs to update its lookup-tables often.

I use the code below in a module. Maybe it’s a candidate for an embedded map-module function.

declare function XQR.map:update

  ( $map                        as map(*)

  , $key                          as xs:anyAtomicType

  , $init.data                 as item()

  , $updateFunction as function(*)

  )

  {

    map:put( $map

                     , $key

                     , $updateFunction( let $go :=

                                                             function( $entry.data

                                                                              )

                                                                             {

                                                                                if ( exists( $entry.data))

                                                                                then $entry.data

                                                                                else $init.data

                                                                             }

                                                            return $go( map:get( $map, $key))

                                                          )

                     )

  } ;

Kind regards,

Rob Stapper

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