Difference between revisions of "Help:Regular expressions"
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* [https://regex101.com/ regex101.com] | * [https://regex101.com/ regex101.com] | ||
* [https://regexr.com/ regexr.com] | * [https://regexr.com/ regexr.com] | ||
| + | * [https://extendsclass.com/regex-tester.html extendsclass.com] | ||
== Examples == | == Examples == | ||
Revision as of 08:49, October 29, 2020
A regular expression (regex) is a sequence of characters defining a search pattern. On the wiki, they are commonly used for finding and replacing text through Special:ReplaceText (staff only), AutoWikiBrowser, Pywikibot, or Scribunto/Lua modules.
Each tool/programming language uses its own ruleset for regular expressions:
- Special:ReplaceText supports a small subset (
( ) . * + ? [ ]) of the PHP and MySQL/PostgreSQL regular-expression set. - AutoWikiBrowser uses .NET regular expressions.
- Pywikibot uses Python regular expressions.
- Lua/Scribunto pattern are similar to regular expressions, but not identical. See this page for a list of differences.
If you need help with regular expressions, you may post on the talk page, or join the Nookipedia Discord and ask in the #wiki-tech channel.
Testing
There are several online tools to test our patterns. A small selection is listed below.
Examples
Below is a list of examples of regular expressions that may help you on the wiki. Feel free to expand this list.
- Matching a multi-line Foreignname template and adding a new "See also" section after it (Python):
- Find:
{{Foreignname([\s\S]*?\n}}) - Replace:
{Foreignname\1\n\n==See also==
