FunctX XQuery Function Library > Strings > Regular Expressions >

functx:number-of-matches

The number of regions that match a pattern

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

XQuery Function Declaration

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

functx:number-of-matches('abcabc','ab')

2

functx:number-of-matches('12345','\d')

5

functx:number-of-matches('aaaaaa','aaa')

2

See Also

History