微信小程序中如何将一些数据改变后添加在data的数据当中

data:{
 //热门课程 小图课
kes:[
  {
    url: "http://bd.eacase.com/budongimg/kc_tuijian1.png",
    title: "钢琴快乐弹唱系列/限时特价最后一天",
    star: 3,
    stars: 1,
    ping: 3,
    zan: 2,
    shou: 3,
    price: 39.90,
    minprice: 4.90
  },
  {
    url: "http://bd.eacase.com/budongimg/kc_tuijian1.png",
    title: "钢琴快乐弹唱系列/限时特价最后一天",
    star: 2,
    stars: 1,
    ping: 3,
    zan: 2,
    shou: 3,
    price: 29.90,
    minprice: 4.90
  },
  {
    url: "http://bd.eacase.com/budongimg/kc_tuijian1.png",
    title: "钢琴快乐弹唱系列/限时特价最后一天",
    star: 3,
    stars: 1,
    ping: 3,
    zan: 2,
    shou: 3,
    price: 19.90,
    minprice: 4.90
  },
  {
    url: "http://bd.eacase.com/budongimg/kc_tuijian1.png",
    title: "钢琴快乐弹唱系列/限时特价最后一天",
    star: 0,
    stars: 1,
    ping: 3,
    zan: 2,
    shou: 3,
    price: 9.90,
    minprice: 4.90
  }
]
},
 onLoad: function (options) {
//热门课程  大图课程  对于对象
var ke = this.data.ke;
for (var a in ke) {
  ke.stars = 5 - ke.star;
}

//热门课程  小图课程 对于数组
var kes=this.data.kes;
for(var i=0;i<kes.length;i++){
  kes[i].stars = 5 - kes[i].star;
}
//将data中的数据 替换
this.setData({
  ke: ke,
  kes: kes
});
},