【高级技巧】位运算实现装备槽位管理：12槽一整数

local function bitGet(mask, k)
    return math.floor(mask / 2 ^ k) % 2
end
local function bitSet(mask, k, v)
    local cur = bitGet(mask, k)
    if cur == v then
        return mask
    end
    if v == 1 then
        return mask + 2 ^ k
    end
    return mask - 2 ^ k
end
local function canWear(actor, slot)
    actor = getplayerbyname(actor)
    local mask = tonumber(getplayvar(actor, "HUMAN", "SlotMask")) or 0
    if bitGet(mask, slot) == 1 then
        sendmsg(actor, 1, "槽位 " .. slot .. " 已有装备。")
        return false
    end
    return true
end

local function wearWeapon(actor)
    actor = getplayerbyname(actor)
    if not canWear(actor, 2) then
        return
    end
    local mask = tonumber(getplayvar(actor, "HUMAN", "SlotMask")) or 0
    mask = bitSet(mask, 2, 1)
    setplayvar(actor, "HUMAN", "SlotMask", mask, 1)
    sendmsg(actor, 1, "裁决之杖已登记到右手槽。")
end