【进阶实战】Lua枚举白名单：祖玛教主报名职业的合法集合校验

local function signUp(actor, job)
    if job ~= "" then              -- 只判非空，脏值放行
        setplayvar(actor, "JOB", job)
    end
end

local JOBS = {["战士"] = true, ["法师"] = true, ["道士"] = true}
local function signUp(actor, job)
    if not JOBS[job] then
        sendmsg(actor, 1, "职业非法，仅收战士/法师/道士")
        return
    end
    setplayvar(actor, "ZUMA_JOB", job)
    sendmsg(actor, 1, "祖玛教主报名成功：" .. job)
end