Module:Yesno

-- Used to evaluate args to booleans where applicable -- Based on  -- 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 end if       arg == 'yes' or        arg == 'y' or        arg == 'true' or        tonumber( arg ) ==  1 then return true end if       arg == 'no' or        arg == 'n' or        arg == 'false' or        arg == '' or        tonumber( arg ) == 0 then return false end return default end