Lua引用比较：==判等的同一性语义

local same = (cfgA == cfgB)   -- 内容相同也判 false

local function sameKeys(a, b)
    if type(a) ~= "table" or type(b) ~= "table" then
        return a == b
    end
    for k, v in pairs(a) do
        if not sameKeys(v, b[k]) then
            return false
        end
    end
    return true
end
local x = {金币 = 100}
local y = x
local z = {金币 = 100}
local p = getplayerbyname("cmp01")
sendmsg(p, 1, "引用相同 " .. tostring(x == y) ..
    "，内容相同 " .. tostring(sameKeys(x, z)))