【入门夯实】json解析边界：null与空数组的解析形态

local function loadActivityBad(jsonStr)
    local cfg = json2tbl(jsonStr)
    return cfg.count + 1
end

local function loadActivity(actor, jsonStr)
    actor = getplayerbyname(actor)
    local cfg = json2tbl(jsonStr)
    local count = tonumber(cfg.count) or 0
    local list = {}
    if type(cfg.list) == "table" then
        for _, v in ipairs(cfg.list) do
            list[#list + 1] = tostring(v)
        end
    end
    sendmsg(actor, 1, "活动配置：count=" .. count .. "，list=" .. #list .. " 项。")
    return count, list
end

local function buildJsonSafe()
    local arr = { "甲", "乙" }
    local obj = { name = "活动", version = 3 }
    return arr, obj
end