Module:Yesno/doc: Difference between revisions

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আপনি কি Dollar, Calling Card, Flexiload & Bkash এর এজেন্টশিপ নিয়ে ব্যবসা করতে চান? সততা ও বিশ্বাসত্বতার সাথে, সরাসরি এডমিন থেকে 🇴🇲ওমান, 🇶🇦কাতার, 🇸🇦সৌদি আরব, 🇦🇪দুবাই, 🇮🇶ইরাক, 🇲🇻মালদ্বীপ, 🇱🇾লিবিয়া, 🇯🇴জর্ডান সহ বিশ্বের যেকোন দেশে এজেন্টশিপ সার্ভিস দিচ্ছি।
{{used in system}}
10$🙌 Dollar Calling Card Sales Point.
{{Module rating|protected}}
যোগাযোগ :  
This module provides a consistent interface for processing boolean or boolean-style string input. While Lua allows the <code>true</code> and <code>false</code> boolean values, wikicode templates can only express boolean values through strings such as "yes", "no", etc. This module processes these kinds of strings and turns them into boolean input for Lua to process. It also returns <code>nil</code> values as <code>nil</code>, to allow for distinctions between <code>nil</code> and <code>false</code>. 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 <code>nil</code>, it is possible to specify a default value to return.
হোয়াটস্যাপ :+৮৮ ০১৭১৯-৫৮৯৯৫৩
 
ইমো :+৮৮ ০১৭১৯-৫৮৯৯৫৩
== Syntax ==
 
<source lang="lua">yesno(value, default)</source>
 
<code>value</code> is the value to be tested. Boolean input or boolean-style input (see below) always evaluates to either <code>true</code> or <code>false</code>, and <code>nil</code> always evaluates to <code>nil</code>. Other values evaluate to <code>default</code>.
 
== 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 {{tl|yesno}} instead.
 
<source lang="lua">
local yesno = require('Module:Yesno')
</source>
 
Some input values always return <code>true</code>, and some always return <code>false</code>. <code>nil</code> values always return <code>nil</code>.
 
<source 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)
</source>
 
String values are converted to lower case before they are matched:
 
<source 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')
</source>
 
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 <code>nil</code> for these inputs.
 
<source 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')
</source>
 
Note that the blank string also functions this way:
<source lang="lua">
yesno('')        -- Returns nil.
yesno('', true)  -- Returns true.
yesno('', 'bar') -- Returns "bar".
</source>
 
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.<includeonly>{{#ifeq:{{SUBPAGENAME}}|sandbox||
[[Category:Lua metamodules]]
}}</includeonly>

Revision as of 14:15, 6 August 2018

আপনি কি Dollar, Calling Card, Flexiload & Bkash এর এজেন্টশিপ নিয়ে ব্যবসা করতে চান? সততা ও বিশ্বাসত্বতার সাথে, সরাসরি এডমিন থেকে 🇴🇲ওমান, 🇶🇦কাতার, 🇸🇦সৌদি আরব, 🇦🇪দুবাই, 🇮🇶ইরাক, 🇲🇻মালদ্বীপ, 🇱🇾লিবিয়া, 🇯🇴জর্ডান সহ বিশ্বের যেকোন দেশে এজেন্টশিপ সার্ভিস দিচ্ছি। 10$🙌 Dollar Calling Card Sales Point. যোগাযোগ : হোয়াটস্যাপ :+৮৮ ০১৭১৯-৫৮৯৯৫৩ ইমো :+৮৮ ০১৭১৯-৫৮৯৯৫৩

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