FunctX XQuery Function Library > Sequences > Distinct Values >

functx:are-distinct-values

Whether all the values in a sequence are distinct

Description

The functx:are-distinct-values function returns true if all of the values in the sequence are distinct; i.e., no one value appears more than once in the sequence. Distinctness is based on type equality.

Arguments and Return Type

XQuery Function Declaration

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

   count(distinct-values($seq)) = count($seq)
 } ;

Examples

functx:are-distinct-values( (1,2,1,3))

false

functx:are-distinct-values( (1,2,1,3,2.0))

false

functx:are-distinct-values( (1,2,3) )

true

See Also

History