文章标题

没有值的补充横杆

{"success":true,"message":"","returnValue":[{"downList":[{"channel_name":"辽宁","ratio":-7.65},{"channel_name":"贵州","ratio":-3.49},{"channel_name":"青海","ratio":-3.22},{"channel_name":"四川","ratio":-2.86},{"channel_name":"安徽","ratio":-2.64}],"upList":[{"channel_name":"宁夏","ratio":5.02},{"channel_name":"吉林","ratio":4.47},{"channel_name":"内蒙古","ratio":4.08},{"channel_name":"天津","ratio":2.84},{"channel_name":"河北","ratio":2.69}]}]}

js

if (!data[0].downList[i]) {
data[0].downList[i] = {
"channel_name": "--",
"ratio": null
};
}
if (!data[0].upList[i]) {
data[0].upList[i] = {
"channel_name": "--",
"ratio": null
};
}