Created
November 23, 2016 12:48
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Sum maps in XQuery (1.0-ml)
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| xquery version "1.0-ml"; | |
| declare namespace html = "http://www.w3.org/1999/xhtml"; | |
| let $existing := map:entry("foo",9) | |
| let $maps := ( | |
| map:entry("foo",1), | |
| map:entry("foo",2), | |
| map:entry("foo",3), | |
| map:entry("foo",4), | |
| map:entry("foo",5), | |
| map:entry("foo",1) | |
| ) | |
| let $fold-join := | |
| fn:fold-left( | |
| function($a,$b) { | |
| map:keys($b) ! map:put($a,.,(map:get($b,.),map:get($a,.))),$a | |
| }, | |
| ?,?) | |
| return | |
| fn:sum($fold-join($existing,$maps)) |
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