Module:Yesno Explained

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

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 val

'on' or tonumber(val)

1 then return true elseif val

false or val

'no' or val

'n' or val

'false' or val

'f' or val

'off' or tonumber(val)

0 then return false else return default endend