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FunctX XQuery Functions

functx:non-distinct-values

Returns any values that appear more than once in a sequence

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Description

The functx:non-distinct-values function returns any values that appear more than once in a list, based on typed value. All the values must have comparable types, or be untyped.

Arguments and Return Type

NameTypeDescription
$seq xs:anyAtomicType* the sequence of values
return value xs:anyAtomicType*

XQuery Function Declaration

See XSLT definition.
declare namespace functx = "http://www.functx.com";
declare function functx:non-distinct-values
  ( $seq as xs:anyAtomicType* )  as xs:anyAtomicType* {

   for $val in distinct-values($seq)
   return $val[count($seq[. = $val]) > 1]
 } ;

Examples

XQuery ExampleResults
functx:non-distinct-values( (1,2,1,3))
1
functx:non-distinct-values( (1,2,1,3,2.0))
(1, 2)
functx:non-distinct-values( (1,2,3) )
()

See Also

functx:are-distinct-valuesWhether all the values in a sequence are distinct
fn:distinct-valuesThe distinct atomic values in a sequence

History

Published OnLast UpdatedContributor(s)
2006-06-272007-02-26Priscilla Walmsley, Datypic, pwalmsley@datypic.com, http://www.datypic.com
Datypic XQuery Services

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