Lua版本号比较：分段数字的逐段比对

-- 错误：字符串直比，字典序背叛数字序
if curVer >= needVer then
    pass()
end

local function cmpVer(a, b)
    local pa, pb = {}, {}
    for n in a:gmatch("%d+") do
        pa[#pa + 1] = tonumber(n)
    end
    for n in b:gmatch("%d+") do
        pb[#pb + 1] = tonumber(n)
    end
    for i = 1, math.max(#pa, #pb) do
        local x, y = pa[i] or 0, pb[i] or 0
        if x ~= y then
            return x < y and -1 or 1
        end
    end
    return 0
end
local label = panel:getChildByName("verText")
label:setString(cmpVer("1.10.0", "1.9.0"))