Updating counter in XQuery

Question

I want to create a counter in xquery. My initial attempt looked like the following:

let $count := 0
for $prod in $         


        

Answer 1

Specific to MarkLogic you can also use xdmp:set. But this breaks functional language assumptions, so use it conservatively.

http://docs.marklogic.com/5.0doc/docapp.xqy#display.xqy?fname=http://pubs/5.0doc/apidoc/ExsltBuiltins.xml&category=Extension&function=xdmp:set

For an example of xdmp:set in real-world code, the search parser https://github.com/mblakele/xqysp/blob/master/src/xqysp.xqy might be helpful.