小编Hea*_*ode的帖子

我的代码非常类似于此:

LINT_rep::Iterator::difference_type LINT_rep::Iterator::operator+(const Iterator& right)const
{
    return (this + &right);//IN THIS PLACE I'M GETTING AN ERROR
}

LINT_rep::Iterator::difference_type LINT_rep::Iterator::operator-(const Iterator& right)const
{//substracts one iterator from another
    return (this - &right);//HERE EVERYTHING IS FINE
}

err msg: Error  1   error C2110: '+' : cannot add two pointers

为什么我只在一个地方而不是两个地方都收到错误？

我正在使用Sugar ORM来持久保存和检索数据.下面是我用来存储和检索数据的代码.

Slider.deleteAll(Slider.class);
JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, Constants.URL, jsonRepos.getSliderJobj(),
    new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            Log.d(Constants.MAINACTIVITY,response.toString());
            try {
                JSONArray sliderArray = response.getJSONArray("slider");
                    for (int i=0; i<sliderArray.length(); i++){
                        JSONObject sliderArrayJSONObject = sliderArray.getJSONObject(i);
                        String id = sliderArrayJSONObject.getString("id");
                        String albumId = sliderArrayJSONObject.getString("album_id");
                        String title = sliderArrayJSONObject.getString("title");
                        String imgUrl = sliderArrayJSONObject.getString("img_url");
                        String file = sliderArrayJSONObject.getString("file");
                        Log.d(Constants.MAINACTIVITY,file);
                        Log.d("Note", "saving");
                        Slider slider = new Slider(id, albumId, title , file, imgUrl);
                        slider.save();
                    }
                catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            },
        appController.getErrorListener()
    ); …

我有一个典型的用户管理模块，我想为其创建REST API。用户应该能够访问他/她的详细信息，但不应被允许访问其他用户详细信息。作为管理员用户，应该能够获取任何用户或删除任何用户。

这就是我打算创建URL端点的方式，有什么建议吗？

# To create/register user
POST /api/users/
# or
POST /api/register/

# To get all users
# This will be allowed to access only by admins.
GET /api/users/

# To get current user.
# For admin, allowed
# For regular user, id will be validated against userid stored in the session.
GET /api/users/<id>/

# To update current user.
# This id will be validated against userid stored in the session.
PUT /api/users/<id>/

# To delete current user.
# …