Javascript json数据与数组数据处理

我有这么这么一个json文本：

var jsondata={"name":图图,"provice":340000,"city":341200,"district":341226,"sex":1,"job":01000};

以及一个数组：arr=
 [{birth: "2016-04-07",id: "2",sex: "2"},{birth: "2016-04-07",id: "2",sex: "2"}]

问：现在怎么把这个数组和这个jsondata结合，形成这样的json格式：
{
 "name": "图图",
 "province": "340000",
 "city": "341200",
 "district": "341226",

 "sex": "1",
 "job": "01000",
 "baby": [
 {
 "id": "1",
 "name": "5555555555",
 "user_id": "3",
 "sex": "1",
 "birth": "1461340800"
 },
 {
 "id": "2",
 "name": "44444444444",
 "user_id": "3",
 "sex": "2",
 "birth": "1459958400"
 }
 ]
 }