【高级技巧】Lua元表事件分发：仓库裁决之杖的统一响应封装

local function onOpen(actor, kind)
    if kind == "装备" then
        giveitem(actor, "裁决之杖", 1, 0, "仓库")
    elseif kind == "药品" then
        giveitem(actor, "金创药", 2, 0, "仓库")
    end   -- 新道具要回来补分支
end

local handlers = setmetatable({
    装备 = function(actor) giveitem(actor, "裁决之杖", 1, 0, "仓库") end,
    药品 = function(actor) giveitem(actor, "金创药", 2, 0, "仓库") end
}, { __index = function()
        return function(a) sendmsg(a, 1, "未知物品类型。") end
    end })
local function onOpen(actor, kind)
    handlers[kind](actor)
end