Pack Count

Use table.pack when nil values must still count as arguments.

pack_count.lua

local middle = 
local count = table.pack("red", middle, nil).n
print("middle=" .. tostring(middle))
print("count=" .. count)

local middle = 
local count = table.pack("red", middle, nil).n
print("middle=" .. tostring(middle))
print("count=" .. count)

local middle = 
local count = table.pack("red", middle, nil).n
print("middle=" .. tostring(middle))
print("count=" .. count)

nil aware count `table.pack(...).n` keeps the original argument count even when one argument is `nil`.