Re: unpack in lua5.1
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- Subject: Re: unpack in lua5.1
- From: Rici Lake <lua@...>
- Date: 2006年11月28日 22:59:33 -0500
On 28-Nov-06, at 10:48 PM, al_lea wrote:
hi,
I'd just port some code from lua5.0 to 5.1 and found that unpack(arg)
doesn't
work as expected.
code sample:
g_load_new =
{
[1] = "arcaves.lua",
[4] = 1,
n = 4,
}
function foo(...)
print(unpack(arg))
print(arg.n)
end
foo(unpack(g_load_new))
-- end --
in 5.0 the output is:
arcaves.lua nil nil 1
4
in 5.1 the output is:
arcaves.lua
1
Is there some way to make the unpack works well with nil holes?
Try:
unpack(g_load_new, 1, g_load_new.n)
I don't quite understand why you're packing an array in order to unpack
it in order to send it to a varargs function. If you want to find out
how many arguments you received, use:
select('#', ...)
If you want to convert ... to an array with explicit length, use:
{n = select('#', ...), ...}
(which is essentially 5.0 compatibility)