Re: functional programming-like closures

[paul@...]

In case you really miss this, here is how we do it in our game:

--
--  it joins array t2 to the end of array t1. t1 is altered.
--
function join_array(t1, t2)
    for k, v in t2 do
        tinsert(t1, v)
    end
end

--
--  make a new function by delaying the call to the real one with ready
--  arguments.
--
function mk_func(func, ...)
    local args = arg
    return function(...)
                join_array(%args, arg)
                call(%func, %args)
           end
end

--
-- So, when you have f(x, y, z), and you can do
--
	g = mk_func(f, x)

--
-- and later invoked g like this
--
	g(y, z)

Regards,
.paul.

On Mon, Sep 10, 2001 at 07:01:21AM -0400, John D. Ramsdell wrote:
> RLake@oxfam.org.uk writes:
> 
> > I actually quite liked the fact that Lua does functional (in the
> > functional programming sense) closures. I'll miss it -- but I guess
> > I'm in the minority.
> 
> The current version of Lua does not provide "functional (in the
> functional programming sense) closures".  The upvalue-less version
> coming will provide the kind of closures that are provided by modern
> functional programming languages, such as Scheme, and ML.  The whole
> point of dumping upvalues is to get real closures!  I promise you that
> once you gain experience with the real thing, you won't miss upvalues.
> 
> To the Core Lua Team: Congradulations on giving variables in Lua
> static nested scope.
> 
> To Christian Vogler: Thank you so much for providing lua-mode.el!!!
> 
> John