Module:Yesno

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

--
-- Used to evaluate args to booleans where applicable
--
-- Based on <https://en.wikipedia.org/wiki/Module:Yesno>
-- see page history there for contributors
--

return function( arg, default )

	arg = type( arg ) == 'string' and mw.ustring.lower( arg ) or arg

	if arg == nil then
		return nil
	elseif arg == 'yes' or
			arg == 'y' or
			arg == 'true' or
			tonumber( arg ) ==  1
	then
		return true
	elseif arg == 'no' or
			arg == 'n' or
			arg == 'false' or
			arg == '' or
			tonumber( arg ) == 0
	then
		return false
	else
		return default
	end

end