- XQuery Tutorial
- XQuery - Home
- XQuery - Overview
- XQuery - Environment Setup
- XQuery - First Application
- XQuery - FLWOR
- XQuery - HTML Format
- XQuery - XPath
- XQuery - Sequences
- XQuery - Sequence Functions
- XQuery - String functions
- XQuery - Date Functions
- XQuery - Regular Expressions
- XQuery - If Then Else
- XQuery - Custom Functions
- XQuery Useful Resources
- XQuery - Quick Guide
- XQuery - Useful Resources
- XQuery - Discussion
XQuery - index-of Function
The index-of function is used to track items in the given sequence. It returns integers to indicate the availability of items in a given sequence.
Syntax
index-of($seq as anyAtomicType()*, $target as anyAtomicType())
Input Parameters
$seq − provided sequence. Sequence can contain 0 or more items.
$target − item whose index is to be returned.
Example
XQuery Expression
let $items := (1,2,3,4,5,6) let $indexOf := index-of($items,4) return <result> <indexof>{$indexOf}</indexof> </result>
Output
<result> return <indexof>4</indexof> </result>
Verify the Result
In order to test the above-mentioned functionality, replace the contents of books.xqy (mentioned in Environment Setup chapter) with the above XQuery expression and execute the XQueryTester java program to verify the result.
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