Description
The functx:index-of-match-first function returns an integer representing the first position of a substring that matches $pattern within $arg. If $arg does not match $pattern, the empty sequence is returned.
Arguments and Return Type| Name | Type | Description |
|---|
$arg |
xs:string? |
the string |
$pattern |
xs:string |
the pattern to match |
| return value |
xs:integer? |
XQuery Function Declaration| See XSLT definition. | declare namespace functx = "http://www.functx.com";
declare function functx:index-of-match-first
( $arg as xs:string? ,
$pattern as xs:string ) as xs:integer? {
if (matches($arg,$pattern))
then string-length(tokenize($arg, $pattern)[1]) + 1
else ()
} ; |
Examples| XQuery Example | Results |
|---|
functx:index-of-match-first(
'abcdabcdabcd','abc') |
1 |
functx:index-of-match-first(
'abcdabcdabcd','bcd') |
2 |
functx:index-of-match-first('a1234','\d') |
2 |
functx:index-of-match-first('abc abc','\s') |
4 |
functx:index-of-match-first('abc abc','z') |
() |
See AlsoHistory |
Recommended Reading: 
|
