Subject: Re: [xsl] Subtle (or not?) Map Processing Bug in XQuery From: "Eliot Kimber ekimber@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 7 Jan 2022 17:45:43 -0000 |
Christian and Jean-Paul, I hadnbt thought about map:for-each() (not sure I even realized it was an option). Ibll have to think about that more. Map:for-each() B feels very familiar to my JavaScript brain (which it pains me to admit I even have but there it is). Ibll check out Joebs book... Cheers, E. -- Eliot Kimber http://contrext.com From: "Christian GrC<n christian.gruen@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Reply-To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> Date: Friday, January 7, 2022 at 11:21 AM To: xsl-list <xsl-list@xxxxxxxxxxxxxxxxxxxxxx> Subject: Re: [xsl] Subtle (or not?) Map Processing Bug in XQuery Hi Eliot, Ibm also wondering if therebs any general source of XQuery coding patterns for working with maps in non-trivial ways? I havenbt run across one but I havenbt looked too hard yet. You could use map:remove, either with map:keysb& let $orphanMap := map:remove($imageMap, map:keys($imageMap)[not(local:notReferenced($imageMap(.)('keyname')))] ) b&or in combination with map:for-each: let $orphanMap := map:remove($imageMap, map:for-each($imageMap, function($k, $v) { if(local:notReferenced($v('keyname'))) then () else $k }) ) XQuery 4.0 will probably include a map:filter function [1] and, possibly, additional functions for iterating over the entries of a map [2]. Hope this helps, Christian [1] https://qt4cg.org/branch/master/xpath-functions-40/Overview.html#func-map-fil ter [2] https://github.com/qt4cg/qtspecs/issues/29
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