wx.request({
                        url: app.requestUrl("Index/answer"),
                        method: 'POST',
                        data: {
                            answer: JSON.stringify(needData),
                        },
                        header: { "content-type": "application/x-www-form-urlencoded" },
                        dataType: "json",
                        success: function(res) {

                        }

                    });

    public function answer(){
        $answer=I('post.answer');
        $answer=htmlspecialchars_decode($answer);
        $answer=json_decode($answer);
    }

function assignObject(o, n) {
    for (var p in n) {
        if (n.hasOwnProperty(p) && (!o.hasOwnProperty(p)))
            o[p] = n[p];
    }
}

var arr=[1,2,3,4,5];
var obj={
    node:123,
    name:"huang"
};
var newarr=[...arr,6,7,8];　　// 可以解析
var newobj={...obj,age:12};   // 无法解析，报错