【高级技巧】Lua行程压缩：沙巴克战报串的RLE瘦身

local function report(actor, wall)
    local marks = string.rep("8", wall * 10)   -- 4000字符直发
    sendmsg(actor, 1, "沙巴克城墙 " .. marks)
end

local function rle(s)
    local out = {}
    for ch, run in string.gmatch(s, "(.)(%1*)") do
        out[#out + 1] = ch .. (#run > 1 and "*" .. #run or "")
    end
    return table.concat(out)
end
local function report(actor, wall)
    sendmsg(actor, 1, "沙巴克城墙 "
        .. rle(string.rep("8", wall * 10)))
end