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functx:value-intersect

The intersection of two sequences of values

Description

The functx:value-intersect function returns the intersection of the values in two sequences (values that appear in both sequences) in an implementation-defined order. It removes duplicates. This function is useful because the built-in intersect operator only works on nodes, not atomic values.

Arguments and Return Type

XQuery Function Declaration

declare namespace functx = "http://www.functx.com";
declare function functx:value-intersect
  ( $arg1 as xs:anyAtomicType* ,
    $arg2 as xs:anyAtomicType* )  as xs:anyAtomicType* {

  distinct-values($arg1[.=$arg2])
 } ;

Examples

functx:value-intersect((1,2),(2,3))

2

functx:value-intersect((1,2,3),(2,3,4))

(2, 3)

functx:value-intersect((1,2,2,3),(2,3))

(2, 3)

functx:value-intersect((1,2,2,3),())

()

See Also

History