Module:Yesno/doc/ja
This is a documentation subpage for Module:Yesno/doc. It contains usage information, categories and other content that is not part of the original Module page. |
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This Lua module is used on many pages. To avoid large-scale disruption and unnecessary server load, any changes to this module should first be tested in its /sandbox or /testcases subpages. The tested changes can then be added to this page in one single edit. Please consider discussing any changes on the talk page before implementing them. |
This module is used in system messages. Changes to it can cause immediate changes to the MediaWiki user interface. To avoid large-scale disruption, any changes should first be tested in this module's /sandbox or /testcases subpage, or in your own user space.The tested changes can then be added in one single edit to this module. Please discuss any changes on the talk page before implementing them. |
<translate> This module is rated as [[<tvar name=1>Special:MyLanguage/Category:Modules for general use</tvar>|ready for general use]].</translate> <translate> It has reached a mature form and is thought to be bug-free and ready for use wherever appropriate.</translate> <translate> It is ready to mention on help pages and other resources as an option for new users to learn.</translate> <translate> To reduce server load and bad output, it should be improved by sandbox testing rather than repeated trial-and-error editing.</translate> |
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このモジュールは、真偽値または真偽値スタイルの文字列入力を処理するための一貫したインターフェイスを提供します。
Lua では true
と false
の真偽値を使用できますが、ウィキコード テンプレートでは "1"、"0"、"yes"、"no" などの文字列でしか真偽値を表現できません。
このモジュールは、このような種類の文字列を処理して、Lua が処理できる真偽値の入力に変えます。
また、nil
の値を nil
として返すことで、nil
と false
の区別ができるようにします。
このモジュールは、真偽値、数値、テーブル、関数など、他の Lua 構造も入力として受け付けます。
If it is passed input that it does not recognise as boolean or nil
, it is possible to specify a default value to return.
Module Quality
- Diff sandbox code
Syntax
yesno(value, default)
value
is the value to be tested.
Boolean input or boolean-style input (see below) always evaluates to either true
or false
, and nil
always evaluates to nil
.
Other values evaluate to default
.
Usage
First, load the module. Note that it can only be loaded from other Lua modules, not from normal wiki pages. For normal wiki pages you can use {{yesno}} instead.
local yesno = require('Module:Yesno')
Some input values always return true
, and some always return false
.
nil
values always return nil
.
-- These always return true:
yesno('yes')
yesno('y')
yesno('true')
yesno('t')
yesno('1')
yesno(1)
yesno(true)
-- These always return false:
yesno('no')
yesno('n')
yesno('false')
yesno('f')
yesno('0')
yesno(0)
yesno(false)
-- A nil value always returns nil:
yesno(nil)
String values are converted to lower case before they are matched:
-- These always return true:
yesno('Yes')
yesno('YES')
yesno('yEs')
yesno('Y')
yesno('tRuE')
-- These always return false:
yesno('No')
yesno('NO')
yesno('nO')
yesno('N')
yesno('fALsE')
You can specify a default value if yesno
receives input other than that listed above.
If you don't supply a default, the module will return nil
for these inputs.
-- These return nil:
yesno('foo')
yesno({})
yesno(5)
yesno(function() return 'This is a function.' end)
-- These return true:
yesno('foo', true)
yesno({}, true)
yesno(5, true)
yesno(function() return 'This is a function.' end, true)
-- These return "bar":
yesno('foo', 'bar')
yesno({}, 'bar')
yesno(5, 'bar')
yesno(function() return 'This is a function.' end, 'bar')
Note that the blank string also functions this way:
yesno('') -- Returns nil.
yesno('', true) -- Returns true.
yesno('', 'bar') -- Returns "bar".
Although the blank string usually evaluates to false
in wikitext, it evaluates to true
in Lua.
This module prefers the Lua behaviour over the wikitext behaviour.
If treating the blank string as false
is important for your module, you will need to remove blank arguments at an earlier stage of processing.