Lua装饰排序：复杂比较键的先算后排

table.sort(players, function(a, b)
    return a.gold / a.lv > b.gold / b.lv   -- 每次比较现算除法
end)

local function sortByRate(players)
    for _, p in ipairs(players) do
        p.key = p.gold / p.lv       -- 装饰：先算键
    end
    table.sort(players, function(a, b)
        return a.key > b.key        -- 只比现成数字
    end)
    for _, p in ipairs(players) do
        p.key = nil                 -- 摘除装饰还原数据
    end
    return players
end
sendmsg(actor, 1, "排序完成 " .. #sortByRate(players) .. " 人")