【入门夯实】Lua字段投影：裁决之杖装备表的轻量视图

local function view(item)
    item.viewName = item.name        -- 直接改源表，污染数据
    item.viewAtk = item.atk
    return item
end

local function pick(src, keys)
    local out = {}
    for i = 1, #keys do
        local k = keys[i]
        out[k] = src[k]              -- 白名单抽取，源表不动
    end
    return out
end
sendmsg(actor, 1, "裁决之杖视图攻击 "
    .. pick(WAND, {"name", "atk", "dur"}).atk)