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FunctX XQuery Functions

functx:number-of-matches

The number of regions that match a pattern

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Description

The functx:number-of-matches function counts the number of times a string matches a particular pattern (regular expression). It does not count overlapping regions.

Arguments and Return Type

NameTypeDescription
$arg xs:string? the string to test
$pattern xs:string the regular expression
return value xs:integer

XQuery Function Declaration

See XSLT definition.
declare namespace functx = "http://www.functx.com";
declare function functx:number-of-matches
  ( $arg as xs:string? ,
    $pattern as xs:string )  as xs:integer {

   count(tokenize($arg,$pattern)) - 1
 } ;

Examples

XQuery ExampleResults
functx:number-of-matches('abcabc','ab')
2
functx:number-of-matches('12345','\d')
5
functx:number-of-matches('aaaaaa','aaa')
2

See Also

fn:matchesWhether a string matches a regular expression

History

Published OnLast UpdatedContributor(s)
2006-07-092007-02-26Priscilla Walmsley, Datypic, pwalmsley@datypic.com, http://www.datypic.com
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