deep copy lua table

copy_lua_table.lua

--复制一个table
--org为源table，des为复制出来的新table
function gf_CopyTable(tbOrg)
    local tbSaveExitTable = {}
    local function _copy(object)
        if type(object) ~= "table" then
            return object
        elseif tbSaveExitTable[object] then	--检查是否有循环嵌套的table
            return tbSaveExitTable[object]
        end
        local tbNewTable = {}
        tbSaveExitTable[object] = tbNewTable
        for index, value in pairs(object) do
            tbNewTable[_copy(index)] = _copy(value)	--要考虑用table作索引的情况
        end
        return setmetatable(tbNewTable, getmetatable(object))
    end
    return _copy(tbOrg)
end