Torch/lua中如何将两个数组合并？

以下是索引表（数组）的示例：

local aaa = {1, 2, 3, 4}
local bbb = {0, 0, 0, 1}
local max= (#aaa>#bbb) and #aaa or #bbb
local merged = {}
for i=1,max do
   if aaa[i] then merged[#merged+1] = aaa[i] end
   if bbb[i] then merged[#merged+1] = bbb[i] end
end

for k,v in pairs(merged) do
 print(k,v)
end