Re: The problem with or and false

["Alexander Gladysh" <agladysh@...>]

> > local r = A[k] if r == nil then
> >   r = B[k] if r == nil then
> >     r = C[k] if r == nil then
> >       error("Not found")
> >     end
> >   end
> > end
> > return r
>
> Is that code so ugly ?

Well, not *so*, but imperfect enough to ask a 'self-educational' question. :)

> You also can try :
>        for _,r in pairs{ A[k], B[k], C[k]} do
>                return r
>        end
>        return error("Not found")

It probably can be written even shorter as

  local _,r = asser_valid(next { A[k], B[k], C[k] }, "Not found")
  return r

(where assert_valid is described in my first letter).

But it involves table creation anyway. Is there a solution without
table creation?

Thanks,
Alexander.