Re: Why does this work?

[GrayFace <sergroj@...>]

On 04.02.2011 10:56, Steve Litt wrote:
> I think it does help. So I define my new function print() as taking argument
> str, so obviously when the program is run str is "Hello World". Then I pass
> that str to oldprint(), which is a reference to print(), which has already
> been defined as taking an argument, so no further definition or declaration
> needed.
>
> Does that about sum it up?

Not really. Any function may take any arguments. Here's an equivalent to 
your code:

    print = function(...)
        local str = ...
        oldprint("======================================")
        oldprint(str)
        oldprint("======================================")
    end

In fact print take any number of arguments, so this is what you should do:
    print = function(...)
        oldprint("======================================")
        oldprint(...)
        oldprint("======================================")
    end

--
Best regards,
Sergey Rozhenko                 mailto:sergroj@mail.ru