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FunctX XQuery Functions

functx:replace-first

Replaces the first match of a pattern

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Description

The functx:replace-first function replaces, within $arg, the first area that matches $pattern) with $replacement. If no area matches the pattern, no replacement is made.

Arguments and Return Type

NameTypeDescription
$arg xs:string? the entire string to change
$pattern xs:string the pattern of characters to replace
$replacement xs:string the replacement string
return value xs:string

XQuery Function Declaration

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

   replace($arg, concat('(^.*?)', $pattern),
             concat('$1',$replacement))
 } ;

Examples

XQuery ExampleResults
functx:replace-first('abcabcabc', 'ab', 'x')
xcabcabc
functx:replace-first('elementary', 'e.*e', 'x')
xntary
functx:replace-first(
   'elementary', 'e.*?e', 'x')
xmentary
functx:replace-first('9999-9999', '\d+', 'X')
X-9999
functx:replace-first('9999-9999', '\d{3}', 'X')
X9-9999

See Also

functx:replace-beginningReplaces the beginning of a string, up to a matched pattern
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
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