【入门夯实】变量遮蔽：同名局部覆盖外层的排查思路

local function processBad(data)
    local count = #data
    if count > 10 then
        local count = 10
        sendmsg(nil, 1, "限制到 " .. count)
    end
    sendmsg(nil, 1, "总量 " .. count)
end

local function processGood(data)
    local totalCount = #data
    local displayLimit = math.min(totalCount, 10)
    for i = 1, displayLimit do
        sendmsg(nil, 1, "条目 " .. i .. "：" .. tostring(data[i]))
    end
    sendmsg(nil, 1, "共 " .. totalCount .. " 条，展示前 " .. displayLimit .. " 条。")
end

local function makeModule()
    local privateCount = 0
    return {
        increment = function() privateCount = privateCount + 1 end,
        value = function() return privateCount end,
    }
end