Re: passing vararg to xpcall?

[PA <petite.abeille@...>]

On Feb 23, 2006, at 20:38, David Given wrote:

> On Thursday 23 February 2006 19:29, PA wrote:
> [...]
> > Yes.. but in practice... how could you tell the difference between a
> > trailing nil and a nonexistent nil?
>
> Because in an argument list, you can spot 'em with arg.n, or whatever
> mechanism 5.1 has to replace this (I forget exactly). This is one of 
> the
> places where tables and tuples are different.

Ok... so... for the sake of completeness... how would you capture the 
length of a table with trailing nil in plain Lua 5.1?

function test()
        return 1, nil, 2, nil
end

local someResults = { test() }

print( "#", #someResults )
print( "maxn", table.maxn( someResults ) )

> #       1
> maxn    3

How would one get the "proper" length of 4? The length operator gives 
1. table.maxn() gives 3. Who gives 4?

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/