Difference between revisions of "Module:Yesno"

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(stop making the default "default" value true, as we run into problems if you need to distinguish between false and nil)
(recognise "t" for true and "f" for false, per request)
(4 intermediate revisions by one other user not shown)
Line 1: Line 1:
 
-- Function allowing for consistent treatment of boolean-like wikitext input.
 
-- Function allowing for consistent treatment of boolean-like wikitext input.
 
-- It works similarly to the template {{yesno}}.
 
-- It works similarly to the template {{yesno}}.
 +
 
return function (val, default)
 
return function (val, default)
    val = type(val) == 'string' and mw.ustring.lower(val) or val -- put in lower case
+
-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
    if val == nil then
+
-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
        return nil
+
-- following line.
    elseif val == false or val == 'no' or val == 'n' or val == 'false' or tonumber(val) == 0 then
+
val = type(val) == 'string' and val:lower() or val
        return false
+
if val == nil then
    elseif val == true or val == 'yes' or val == 'y' or val == 'true' or tonumber(val) == 1 then
+
return nil
        return true
+
elseif val == true
    else
+
or val == 'yes'
        return default
+
or val == 'y'
    end
+
or val == 'true'
 +
or val == 't'
 +
or tonumber(val) == 1
 +
then
 +
return true
 +
elseif val == false
 +
or val == 'no'
 +
or val == 'n'
 +
or val == 'false'
 +
or val == 'f'
 +
or tonumber(val) == 0
 +
then
 +
return false
 +
else
 +
return default
 +
end
 
end
 
end

Revision as of 03:43, 27 April 2015

Documentation for this module may be created at Module:Yesno/doc

-- Function allowing for consistent treatment of boolean-like wikitext input.
-- It works similarly to the template {{yesno}}.

return function (val, default)
	-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
	-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
	-- following line.
	val = type(val) == 'string' and val:lower() or val
	if val == nil then
		return nil
	elseif val == true 
		or val == 'yes'
		or val == 'y'
		or val == 'true'
		or val == 't'
		or tonumber(val) == 1
	then
		return true
	elseif val == false
		or val == 'no'
		or val == 'n'
		or val == 'false'
		or val == 'f'
		or tonumber(val) == 0
	then
		return false
	else
		return default
	end
end