Wikipedia:Comparable Lua functions to wikitext

From Wikipedia, the free encyclopedia

This is a list of Lua functions and the wikitext parser functions and magic words that they are comparable to.

It is slightly out of date for what wikitext parser functions can do.

Parser functions[edit]

Wikitext Lua 
{{#if:x |not empty |empty}}

if x then
    'not empty'
else
    'empty'
end

{{#ifeq:x |y |identical |different}}

if x == y then
    'identical'
else
    'different'
end

{{#iferror:function |bad |good}}

 
if tostring(mw.getCurrentFrame():preprocess('function')):find('<strong class="error"') then
    'bad'
else
    'good'
end

{{#ifexpr:1+2=3 |true|false}}

if 1 + 2 == 3 then
    'true'
else
    'false'
end
[Expensive]
{{#ifexist:namespace:title |exists |doesn't exist}}
[Expensive] 
if mw.title.new('title', 'namespace').exists == true then
    "exists"
else
    "doesn't exist"
end

{{#rel2abs:path |basepath}}

{{#switch:{{{1}}} |foo=Foo |Bar}}

local cases = {
    default = "Bar",
    foo = "Foo",
}

local pframe = mw.getCurrentFrame():getParent()
local arg = pframe.args[1]
cases[arg] or cases["default"]

{{#time:format |timestamp}}

mw.getContentLanguage():formatDate('format', 'timestamp')

{{#timel:format |timestamp}}

mw.getContentLanguage():formatDate('format', 'timestamp', 1)

{{#titleparts:pagename |number of segments to return |first segment to return}}

Math[edit]

Unlike in wikicode, Lua does not use functions like #ifexpr and #expr. Add the Lua operators and functions straight into your module. See mw:Help:Calculation for details on how #expr and mw.ext.ParserFunctions.expr() evaluates expressions.

Grouping
Wikicode Lua
() ()
Numbers
Wikicode Lua
1234.5 1234.5
2e3 2e3
pi math.pi
e math.exp(1)
2+2 2+2
2-1 2-1
Unary
Wikicode Lua
not not
ceil1.2 math.ceil(1.2)
trunc
floor1.2 math.floor(1.2)
abs-2 math.abs(-2)
exp43 math.exp(43)
ln2 math.log(2)
cos0.1 math.cos(0.1)
tan0.1 math.tan(0.1)
acos0.1 math.acos(0.1)
asin0.1 math.asin(0.1)
atan0.1 math.atan(0.1)
Binary
Wikicode Lua
2^3 2^3
2*3 2*3
2/3
2div3		 2/3
30mod7 30%7
+2 2
-2 -2
Logic
Wikicode Data type Lua Data type
3.0=3 Integer (0 or 1) 3.0==3 Boolean (true or false)
3!=4
3<>4		 Integer 3~=4 Boolean
4>3 Integer 4>3 Boolean
4>=3 Integer 4>=3 Boolean
3<=4 Integer 3<=4 Boolean
3<=4 Integer 3<=4 Boolean
and Integer and Boolean
or Integer or Boolean

Magic words[edit]

Date and time[edit]

Wikicode Lua 
{{CURRENTYEAR}}

mw.getContentLanguage():formatDate('Y')
or
os.date("%Y")

{{CURRENTMONTH}}

mw.getContentLanguage():formatDate('m')
or
os.date("%m")

{{CURRENTMONTH1}}

mw.getContentLanguage():formatDate('n')

{{CURRENTMONTHNAME}}

mw.getContentLanguage():formatDate('F')

{{CURRENTMONTHNAMEGEN}}

mw.getContentLanguage():formatDate('xg')

{{CURRENTMONTHABBREV}}

mw.getContentLanguage():formatDate('M')

{{CURRENTDAY}}

mw.getContentLanguage():formatDate('j')

{{CURRENTDAY2}}

mw.getContentLanguage():formatDate('d')
or
os.date("%d")

{{CURRENTDOW}}

mw.getContentLanguage():formatDate('w')
or
os.date("%w")

{{CURRENTDAYNAME}}

mw.getContentLanguage():formatDate('l')

{{CURRENTTIME}}

mw.getContentLanguage():formatDate('H:i')
or
os.date("%R")

{{CURRENTHOUR}}

mw.getContentLanguage():formatDate('H')
or
os.date("%H")

{{CURRENTWEEK}}

mw.getContentLanguage():formatDate('W')

{{CURRENTTIMESTAMP}}

mw.getContentLanguage():formatDate('YmdHis')

Technical metadata[edit]

Wikicode Lua 
{{SITENAME}}

mw.site.siteName

{{SERVER}}

mw.site.server

{{SERVERNAME}}

{{DIRMARK}}

mw.language.getContentLanguage():getDirMark()

{{SCRIPTPATH}}

mw.site.scriptPath

{{STYLEPATH}}

mw.site.stylePath

{{CURRENTVERSION}}

mw.site.currentVersion

{{CONTENTLANGUAGE}}

mw.getContentLanguage():getCode()

{{PAGEID}}

mw.title.getCurrentTitle().id

{{PAGESIZE:pagename}}

{{PAGESIZE:pagename|R}}

mw.getContentLanguage():formatNum(mw.title.new(pagename):getContent():len())

mw.title.new(pagename):getContent():len()

{{PROTECTIONLEVEL:edit}}
[Expensive]
{{PROTECTIONLEVEL:action|pagename}}

table.concat(mw.title.getCurrentTitle().protectionLevels["edit"])
[Expensive]
table.concat(mw.title.new(pagename).protectionLevels[action])

{{REVISIONID}}

{{REVISIONDAY}}

{{REVISIONDAY2}}

{{REVISIONMONTH}}

{{REVISIONMONTH1}}

{{REVISIONYEAR}}

{{REVISIONTIMESTAMP}}

{{REVISIONUSER}}

{{DISPLAYTITLE:title}}

{{DEFAULTSORT:sortkey}}

Statistics[edit]

Wikicode Lua 
{{NUMBEROFPAGES}}

mw.site.stats.pages

{{NUMBEROFARTICLES}}

mw.site.stats.articles

{{NUMBEROFFILES}}

mw.site.stats.files

{{NUMBEROFEDITS}}

mw.site.stats.edits

{{NUMBEROFVIEWS}}

mw.site.stats.views

{{NUMBEROFUSERS}}

mw.site.stats.users

{{NUMBEROFADMINS}}

mw.site.stats.admins

{{NUMBEROFACTIVEUSERS}}

mw.site.stats.activeUsers
[Expensive]
{{PAGESINCATEGORY:categoryname}}
[Expensive]
mw.site.stats.pagesInCategory('categoryname')

{{NUMBERINGROUP:groupname}}

mw.site.stats.usersInGroup('groupname')

Page names[edit]

Wikicode Lua 
{{FULLPAGENAME}}

mw.title.getCurrentTitle().prefixedText

{{PAGENAME}}

mw.title.getCurrentTitle().text

{{BASEPAGENAME}}

mw.title.getCurrentTitle().baseText

{{SUBPAGENAME}}

mw.title.getCurrentTitle().subpageText

{{SUBJECTPAGENAME}}
[Expensive]
mw.title.getCurrentTitle().subjectPageTitle

or an non expensive alternative: 

mw.title.getCurrentTitle().subjectNsText .. ':' .. mw.title.getCurrentTitle().text

{{TALKPAGENAME}}
[Expensive]
mw.title.getCurrentTitle().talkPageTitle

Namespaces[edit]

Wikicode Lua 
{{NAMESPACE}}

mw.title.getCurrentTitle().nsText

{{NAMESPACENUMBER}}

mw.title.getCurrentTitle().namespace

{{SUBJECTSPACE}}

mw.title.getCurrentTitle().subjectNsText

{{TALKSPACE}}

URL data[edit]

Wikicode Lua 
{{localurl:page|query}}

mw.uri.localUrl('page', 'query')

{{fullurl:page|query}}

mw.uri.fullUrl('page', 'query')

{{canonicalurl:page|query}}

mw.uri.canonicalUrl('page', 'query')

{{filepath:file name}}

{{urlencode:string|QUERY}}

mw.uri.encode('string', QUERY)

{{anchorencode:string}}

mw.uri.anchorEncode('string')

Namespaces[edit]

Wikicode Lua 
{{ns:0}}

mw.site.namespaces[0].name

{{ns:Project}}

mw.site.namespaces.Project.name

Formatting[edit]

Wikicode Lua 
{{formatnum:number}}

mw.getContentLanguage():formatNum(number)

{{#formatdate:date}}

{{#dateformat:date|format}}

{{lc:string}}

mw.ustring.lower('string')

{{lcfirst:string}}

mw.getContentLanguage():lcfirst('string')

{{uc:string}}

mw.ustring.upper('string')

{{ucfirst:string}}

mw.getContentLanguage():ucfirst('string')

{{padleft:xyz|stringlength}}

{{padright:xyz|stringlength}}

Localisation[edit]

Wikicode Lua 
{{plural:2|is|are}}

mw.getContentLanguage():plural(2, 'is', 'are')

{{grammar:N|noun}}

mw.getContentLanguage():grammar('N', 'noun')

{{gender:username|male|female|neutral}}

mw.getContentLanguage():gender('username', { 'male', 'female', 'neutral' })

{{int:message}}

{{int:editsectionhint|MediaWiki}}

mw.message.new('message'):plain()

mw.message.new('editsectionhint', 'MediaWiki'):plain()

Miscellaneous[edit]

Wikicode Lua 
 {{#language:code|inlanguage}}

mw.language.fetchLanguageName('code', 'inLanguage')

{{#special:special page name}}

{{#speciale:special page name}}

{{#tag:tagname |some text |attribute1=value1 |attribute2=value2}}

mw.getCurrentFrame():callParserFunction('#tag', { 'tagname', 'some text', attribute1 = 'value1', attribute2 = 'value2' })

mw.getCurrentFrame():extensionTag('tagname', 'some text', { attribute1 = 'value1', attribute2 = 'value2' })
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