array:index-where

Returns the positions in an input array of members that match a supplied predicate.

index-where($array as array(*), $predicate as fn(item()*, xs:integer) as xs:boolean?) ➔ xs:integer*

Arguments
	$array	array(*)		The input array
	$predicate	fn(item()*, xs:integer) as xs:boolean?		The predicate function
Result		xs:integer*

Namespace

http://www.w3.org/2005/xpath-functions/array

Links to W3C specifications

XPath 4.0 Functions and Operators

Saxon availability

Available in XPath 4.0, XSLT 4.0, and XQuery 4.0, provided that 4.0 features are enabled (see Enabling 4.0 features). Requires Saxon-PE or Saxon-EE. Implemented since Saxon 12. Available for all platforms.

Notes on the Saxon implementation

Available since Saxon 13 in XPath 4.0. Available since Saxon 12.0 provided that syntax extensions are enabled.