565 bytes added,
10 years ago -- Function allowing for consistent treatment of boolean-like wikitext input.
-- It works similarly to the template {{yesno}}.
return function (val, default)
val = type(val) == 'string' and mw.ustring.lower(val) or val -- put in lower case
if val == nil then
return nil
elseif val == false or val == 'no' or val == 'n' or val == 'false' or tonumber(val) == 0 then
return false
elseif val == true or val == 'yes' or val == 'y' or val == 'true' or tonumber(val) == 1 then
return true
else
return default
end
end