RE: Odd behaviour with multiple return values and varargs

[Richard Warburton <richard@...>]

> I'm not sure I understand your point.  In my mind, if I have two
> functions returning 2 values, then I have 4 values plain and simple.  It
> would be treated exactly the same as print(1,2,3,4).  Is there a reason
> not to do it that way? 
Hang on, unlike other languages a function can return different number 
of arguments depending on input.  Now print isn't picky about arguments 
as it is just outputting them to std out.  However, if you had a 
function that required x and y for some parabolic eqn, things could get 
messy if x relied on a fn that returned two values when x was negative.


local calcX

calcX = function(b)
   if b<0 then return calcX(-b),"Warning Negative Fixed" end
   else return math.sqrt(b) end
end

for x=-10,10 do
   plot(calcX(x),10)
end

You don't want returns mucking up input arguments