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(:**************************************************************:)
(: Test: functx-functx-if-empty-1 :)
(: Written by: Priscilla Walmsley (Frans Englich is maintainer) :)
(: Date: 2008-05-16+02:00 :)
(:**************************************************************:)
declare namespace functx = "http://www.example.com/";
(:~
: The first argument if it is not blank, otherwise the second argument
:
: @author Priscilla Walmsley, Datypic
: @version 1.0
: @see http://www.xqueryfunctions.com/xq/functx_if-empty.html
: @param $arg the node that may be empty
: @param $value the item(s) to use if the node is empty
:)
declare function functx:if-empty
( $arg as item()? ,
$value as item()* ) as item()* {
if (string($arg) != '')
then data($arg)
else $value
} ;
let $in-xml := <prices>
<price discount="10.00">29.99</price>
<price discount="6.00">39.99</price>
<price></price>
<price discount="">49.99</price>
</prices>
return (functx:if-empty($in-xml//price[1], 0))
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