【高级技巧】Lua环形缓冲：沙巴克战斗日志的固定50条滚动

local logs = {}
local function addLog(actor, msg)
    logs[#logs + 1] = msg          -- 无上限追加，12万条不清理
end

local logs, pos, N = {}, 0, 50
local function addLog(actor, msg)
    pos = pos % N + 1              -- 写指针循环回绕
    logs[pos] = msg .. " @" .. os.time()
    if pos == 1 and logs[N] then
        sendmsg(actor, 1, "沙巴克战报已滚动覆盖")
    end
end