Module:Yesno

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 add them to this module now so that you don't have to edit it later.
	val = type(val) == 'string' and mw.ustring.lower(val) or val -- put in lower case
	if val == nil then
		return nil
	elseif val == true 
		or val == 'yes'
		or val == 'y'
		or val == 'true'
		or val == 'on'
		or tonumber(val) == 1
		then
		return true
	elseif val == false
		or val == 'no'
		or val == 'n'
		or val == 'false'
		or val == 'off'
		or tonumber(val) == 0
		then
		return false
	else
		return default
	end
end