Module:Yesno/doc/ja

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Template:Shared Template Warning Template:High-risk Template:Used in system Template:Module rating Template:Module rating 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

Template:ModuleQuality

構文

<syntaxhighlight lang="lua"> yesno(value, default) </syntaxhighlight>

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.

使用法

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.

<syntaxhighlight lang="lua"> local yesno = require('Module:Yesno') </syntaxhighlight>

Some input values always return true, and some always return false. nil values always return nil.

<syntaxhighlight lang="lua"> -- 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) </syntaxhighlight>

String values are converted to lower case before they are matched:

<syntaxhighlight lang="lua"> -- 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') </syntaxhighlight>

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.

<syntaxhighlight lang="lua"> -- 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') </syntaxhighlight>

Note that the blank string also functions this way:

<syntaxhighlight lang="lua"> yesno() -- Returns nil. yesno(, true) -- Returns true. yesno(, 'bar') -- Returns "bar". </syntaxhighlight>

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.

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| = Template:Languages Template:Shared Template Warning Template:High-risk Template:Used in system Template:Module rating Template:Module rating This module provides a consistent interface for processing boolean or boolean-style string input. While Lua allows the true and false boolean values, wikicode templates can only express boolean values through strings such as "1", "0", "yes", "no", etc. This module processes these kinds of strings and turns them into boolean input for Lua to process. It also returns nil values as nil, to allow for distinctions between nil and false. The module also accepts other Lua structures as input, i.e. booleans, numbers, tables, and functions. If it is passed input that it does not recognise as boolean or nil, it is possible to specify a default value to return.

Syntax

<syntaxhighlight lang="lua"> yesno(value, default) </syntaxhighlight>

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.

<syntaxhighlight lang="lua"> local yesno = require('Module:Yesno') </syntaxhighlight>

Some input values always return true, and some always return false. nil values always return nil.

<syntaxhighlight lang="lua"> -- 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) </syntaxhighlight> String values are converted to lower case before they are matched: <syntaxhighlight lang="lua"> -- 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') </syntaxhighlight>

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.

<syntaxhighlight lang="lua"> -- 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') </syntaxhighlight> Note that the blank string also functions this way: <syntaxhighlight lang="lua"> yesno() -- Returns nil. yesno(, true) -- Returns true. yesno(, 'bar') -- Returns "bar". </syntaxhighlight>

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. {{safesubst:#if:{{safesubst:#ifeq:ja|sandbox|1}}{{safesubst:#ifeq:ja|doc|1}}|| }} | #default=

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