Question

我正在尝试将结果存储在变量中，以便可以在循环外引用它，并且无法在我的一生中使它正常工作，我们将不胜感激

在下面查看我的代码

public class MainActivity extends AppCompatActivity {
    private TextView mTextViewResult;
    private RequestQueue mQueue;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTextViewResult = findViewById(R.id.text_view_result);
        Button buttonParse = findViewById(R.id.button_parse);

        mQueue = Volley.newRequestQueue(this);

        buttonParse.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                jsonParse();
            }
        });
    }

    private void jsonParse() {

        String url = "https://cdn.sportmonks.com/soccer/json/champions-league-20172018-standings.json";

        JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        try {
                            JSONArray jsonArray = response.getJSONArray("data");

                            for (int i = 0; i < jsonArray.length(); i++) {
                                JSONObject data = jsonArray.getJSONObject(i);

                                String GroupName = data.getString("name");
                                int position = data.getInt("position");
                                String TeamName = data.getString("team_name");

                                mTextViewResult.append(GroupName + ", " + String.valueOf(position) + ", " + TeamName + "\n\n");
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                error.printStackTrace();
            }
        });

        mQueue.add(request);
    }
}

Answer 1

使用#map代替#each：

movie_list = str.map do |movie_list|
  File.basename(movie_list)
end

将变量外循环存储在ruby中

1 个答案: