Extension:ParserPower

MediaWiki extensions manual

File:OOjs UI icon advanced-invert.svg ParserPower Release status: unknown
Author(s)	Shawn Bruckner Hydra Wiki Platform Team
Latest version	1.1.0
MediaWiki
License	GNU General Public License 2.0 or later
Download	GitHub: <translate> project page</translate> <translate> git repository URL</translate> [<translate> help</translate> ] <translate> commit history</translate> <translate> Note:</translate> <translate> No [[<tvar name=1>Special:MyLanguage/Localisation#Translation resources</tvar>|localisation]] updates are provided by <tvar name=twn>translatewiki.net </tvar>.</translate>
Quarterly downloads
Public wikis using

Installation

• <translate> [[<tvar name=2>Special:ExtensionDistributor/ParserPower</tvar>|Download]] and move the extracted <tvar name=name>ParserPower</tvar> folder to your <tvar name=ext>extensions/</tvar> directory.</translate>
  <translate> Developers and code contributors should install the extension [[<tvar name=git>Special:MyLanguage/Download from Git</tvar>|from Git]] instead, using:</translate>cd extensions/
git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/ParserPower
• <translate> Add the following code at the bottom of your <tvar name=1>LocalSettings.php </tvar> file:</translate>

  wfLoadExtension( 'ParserPower' );
  

• File:OOjs UI icon check-constructive.svg <translate> Done</translate> – <translate> Navigate to <tvar name=special>Special:Version</tvar> on your wiki to verify that the extension is successfully installed.</translate>

Usage

ParserPower provides several parser functions, most notably {{#or:param1|param2|param3|...}}, which returns the first nonempty value passed. This can be used as a syntax sugar for {{#if:{{{1|}}}|{{{1}}}|default}}, and if {{{1|}}} is instead a value requiring an expensive computation that won't get cached (e.g. the result of a Cargo query), it provides a Variables-free approach to do the computation only once.

Other parser functions include:

• {{#follow:page title}}, returning a page's name or its redirect target (expensive the first time it's used on a particular page)
• {{#arraymap:value | delimiter | variable | formula | new_delimiter | conjunction}} as in Page Forms (will not load if Page Forms is also installed)
• {{#arraymaptemplate:value | template | delimiter | new_delimiter}} as in Page Forms (will not load if Page Forms is also installed)
• Several list-handling functions:
  • {{#lstcnt:list|separator}}
  • {{#lstsep:list|input separator|output separator}}
  • {{#lstelem:list|input separator|index}} (1-indexed)
  • {{#lstsub:list|input separator|output separator|start index|length}}
  • {{#lstfnd:item to find|list|separator|case sensitivity option}}
  • {{#lstind:item to find|list|separator|options}}
  • {{#lstapp:list|separator|new item}}
  • {{#lstprep:new item|separator|list}}
  • {{#lstjoin:first list|first input separator|second list|second input separator|output separator}}
  • {{#listfilter:}}
  • {{#lstfltr:items to keep|items separator|list|input separator|output separator|case sensitivity option}}
  • {{#lstrm:item to remove|list|input separator|output separator|case sensitivity option}}
  • {{#lstcntuniq:list|separator|case sensitivity option}}
  • {{#listunique:}}
  • {{#listsort:}}
  • {{#listmap:}}
  • {{#listmerge:}}