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| Name | Type | Description |
|---|
$arg |
xs:string? |
the string to escape |
| return value |
xs:string |
XQuery Function Declaration| See XSLT definition. | | XQuery Syntax for July 2004 - January 2007 (1.0): |
|---|
declare namespace functx = "http://www.functx.com";
declare function functx:escape-for-regex
( $arg as xs:string? ) as xs:string {
replace($arg,
'(\.|\[|\]|\\|\||\-|\^|\$|\?|\*|\+|\{|\}|\(|\))','\\$1')
} ; | | XQuery Syntax for May 2003: |
|---|
declare namespace functx = "http://www.functx.com"
define function escape-for-regex
( $arg as xs:string? ) as xs:string {
fn:replace($arg,
'(\.|\[|\]|\\|\||\-|\^|\$|\?|\*|\+|\{|\}|\(|\))','\$1')
} |
Examples| XQuery Example | Results |
|---|
functx:escape-for-regex('5.55')
|
5\.55
|
functx:escape-for-regex('[abc]')
|
\[abc\]
|
See Also| fn:replace | Replaces parts of a string that match a regular expression |
History |
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