【高级技巧】连点风暴：闭包限频器拦住重复公告

local function throttle(fn, interval)
    local last = 0
    return function(...)
        local now = os.time()
        if now - last < interval then
            return false
        end
        last = now
        return fn(...)
    end
end
local announceBossDown = throttle(function(actor, bossName)
    actor = getplayerbyname(actor)
    sendcentermsg(actor, 255, 215, bossName .. " 已被击倒！下一只 4 小时后刷新。", 0, 8)
end, 5)

local claimPrize = throttle(function(actor)
    actor = getplayerbyname(actor)
    if not takeitem(actor, "祖玛头像", 1) then
        sendmsg(actor, 1, "缺少祖玛头像，无法领取奖励。")
        return
    end
    giveitem(actor, "金条", 3)
    return true
end, 3)