home contribute faq download

FunctX XQuery Functions

functx:escape-for-regex

Escapes regex special characters

Google
Webdatypic.com

Description

The functx:escape-for-regex function escapes a string that you wish to be taken literally rather than treated like a regular expression. This is useful when, for example, you are calling the built-in fn:replace function and you want any periods or parentheses to be treated like literal characters rather than regex special characters.

Arguments and Return Type

NameTypeDescription
$arg xs:string? the string to escape
return value xs:string

XQuery Function Declaration

See XSLT definition.
declare namespace functx = "http://www.functx.com";
declare function functx:escape-for-regex
  ( $arg as xs:string? )  as xs:string {

   replace($arg,
           '(\.|\[|\]|\\|\||\-|\^|\$|\?|\*|\+|\{|\}|\(|\))','\\$1')
 } ;

Examples

XQuery ExampleResults
functx:escape-for-regex('5.55')
5\.55
functx:escape-for-regex('[abc]')
\[abc\]

See Also

fn:replaceReplaces parts of a string that match a regular expression

History

Published OnLast UpdatedContributor(s)
2006-06-272007-02-26Priscilla Walmsley, Datypic, pwalmsley@datypic.com, http://www.datypic.com
Datypic XQuery Services

Recommended Reading:

XQuery