Joe Wicentowski joewiz

Regular Expression Engine Comparison Chart

Many different applications claim to support regular expressions. But what does that even mean?

Well there are lots of different regular expression engines, and they all have different feature sets and different time-space efficiencies.

	(:~
	This module converts an XML document into a JSON document.
	- Element ordering is preserved.
	- Attributes and namespaces are ignored.
	- Identical element names become JSON arrays.
	Example usage:
	let $uri := "somedoc.xml"
	let $doc := fn:doc($uri)
	return jsontools:jsonify($doc)

	module namespace tei2="http://exist-db.org/xquery/app/tei2html";
	import module namespace console="http://exist-db.org/xquery/console";

	declare namespace tei="http://www.tei-c.org/ns/1.0";

	declare function tei2:tei2html($nodes as node()*) {
	for $node in $nodes
	return
	typeswitch ($node)
	case text() return

	declare function local:milliseconds-since-epoch($dateTime as xs:dateTime) as xs:integer
	{
	let $epoch := xs:dateTime("1970-01-01T00:00:00Z")
	let $duration := xs:duration($dateTime - $epoch)
	let $days := fn:days-from-duration($duration) * 8.64e+7
	let $hours := fn:hours-from-duration($duration) * 3.6e+6
	let $minutes := fn:minutes-from-duration($duration) * 60000
	let $seconds := fn:seconds-from-duration($duration) * 1000
	return xs:integer($days + $hours + $minutes + $seconds)
	};

	xquery version "3.0";
	(:~
	: Partial facet implementation for eXist-db based on the EXPath specifications (http://expath.org/spec/facet)
	:
	: Uses the following eXist-db specific functions:
	: util:eval
	: request:get-parameter
	: request:get-parameter-names()
	:
	: @author Winona Salesky

	declare function local:type($item as item()?) as xs:string {
	typeswitch ($item)
	(: NOTE: eXist doesn't support XML Schema 1.1 types yet
	case xs:dateTimeStamp return 'xs:dateTimeStamp'
	:)
	case xs:dateTime return 'xs:dateTime'
	case xs:date return 'xs:date'
	case xs:time return 'xs:time'
	case xs:yearMonthDuration return 'xs:yearMonthDuration'
	case xs:dayTimeDuration return 'xs:dayTimeDuration'

	module namespace epoch = "https://gist.github.com/WaxCylinderRevival/ns/xquery/date-to-epoch-time";

	declare function epoch:date-to-epoch-time
	( $dateString as xs:string? ) as xs:decimal? {
	if (empty($dateString))
	then ()
	else
	if (matches($dateString, '^\d{4}-\d{2}-\d{2}$'))
	then (xs:dateTime(xs:date($dateString)) - xs:dateTime("1970-01-01T00:00:00-00:00")) div xs:dayTimeDuration('PT1S')
	else

	xquery version "3.1";

	import module namespace http = "http://expath.org/ns/http-client";
	(: For generating the personal access token to be used in this script, please select "public_repo \| Access public repositories". :)
	let $git-token := "<your-github-token>"
	let $user-name := "<your-github-username>"
	let $repo-name := "<your-repo-name>"
	let $file-path := "<file=path>"
	let $message := "<commit-message>"
	let $new-file-content := serialize(<a/>)

	/*
	This script uses Oxygen operation called JSOperation, see https://www.oxygenxml.com/doc/versions/18.0/ug-editorEclipse/topics/dg-default-author-operations.html.
	For generating the personal access token to be used in this script, please select "public_repo \| Access public repositories".
	This script has to be put in the file ${framework}/commons.js.
	In order to add the button for publishing to github, add the following code to any CSS file that is associated within the framework with the edited XML file:
	rdf\|RDF:before {
	content: oxy_button(action, oxy_action(name, "Publish to github", operation, "ro.sync.ecss.extensions.commons.operations.JSOperation", arg-script, "function doOperation(){publishToGihub();}"))
	}
	*/