All Questions
2,258
questions
337
votes
5
answers
247k
views
Is the order of elements in a JSON list preserved?
I've noticed the order of elements in a JSON object not being the original order.
What about the elements of JSON lists? Is their order maintained?
- 9,029
134
votes
13
answers
301k
views
Unhandled Exception: InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'List<dynamic>
I am trying to get the JSON response from the server and output it to the console.
Future<String> login() async {
var response = await http.get(
Uri.encodeFull("https://etrans....
- 5,087
131
votes
3
answers
221k
views
Python: converting a list of dictionaries to json
I have a list of dictionaries, looking some thing like this:
list = [{'id': 123, 'data': 'qwerty', 'indices': [1,10]}, {'id': 345, 'data': 'mnbvc', 'indices': [2,11]}]
and so on. There may be more ...
- 3,924
103
votes
4
answers
430k
views
Convert JSON array to Python list
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
That is my JSON array, but I would want to convert all the values in ...
- 3,785
93
votes
8
answers
95k
views
Type 'List<dynamic>' is not a subtype of type 'List<int>' where
I am new to Flutter, I try to run one GitHub project but got an error like:
type List dynamic is not a subtype of type List int where.
Github Link
Error Line
List<int> genreIds;
MediaItem....
- 9,109
40
votes
6
answers
81k
views
Jackson read json in generic List
I'm using Jackson in order to read json messages. One of the values that I' trying to parse is a List and another value contains the type of the data in the list. This is the structure i 've created ...
- 423
32
votes
2
answers
33k
views
How can I define a list field in django rest framework?
Let's say I have a class
class Tags(object):
tags = []
def __init__(self, tags):
self.tags = tags
and a custom list field
class TagsField(serializers.WritableField):
"""
...
- 13k
29
votes
5
answers
110k
views
A list of tuples in Javascript [closed]
Let's say I receive a JSON-string containing information about people.
Now I loop through all the JSON-objects and extract the name and age or each person.
How would I store these as tuples in a list ...
- 8,753
27
votes
3
answers
48k
views
Flutter Json Encode List
How to encode list to json?
This is my class for Json.
class Players{
List<Player> players;
Players({this.players});
factory Players.fromJson(List<dynamic> parsedJson){
List&...
- 732
27
votes
3
answers
27k
views
How to custom-sort a list of dict to use in json.dumps
I have a list similar to
allsites = [
{
'A5': 'G',
'A10': 'G',
'site': 'example1.com',
'A1': 'G'
},
{
'A5': 'R',
'A10': 'Y',
'...
- 28.5k
26
votes
8
answers
232k
views
How to convert list data into json in java
I have a function which is returning Data as List in java class. Now as per my need, I have to convert it into Json Format.
Below is my function code snippet:
public static List<Product> ...
- 339
26
votes
2
answers
147k
views
Python Parse JSON array
I'm trying to put together a small python script that can parse out array's out of a large data set. I'm looking to pull a few key:values from each object so that I can play with them later on in the ...
- 877
24
votes
3
answers
26k
views
Jersey can produce List<T> but cannot Response.ok(List<T>).build()?
Jersey 1.6 can produce:
@Path("/stock")
public class StockResource {
@GET
@Produces(MediaType.APPLICATION_JSON)
public List<Stock> get() {
Stock stock = new Stock();
...
- 7,144
21
votes
5
answers
144k
views
How to put a List<class> into a JSONObject and then read that object?
I have a List<class> that I would like to convert into a json object and then traverse the data out of the json object.
If this were just a List<String> I could just do something like:
...
- 12k
20
votes
9
answers
94k
views
How to Create JSONArray for a List<Class name>
I have a class called
class Student {
String name;
String age;
}
I have a method that returns List object like
public List<Student> getList(){
List<Student> li =new ArrayList();
....
- 568
20
votes
2
answers
71k
views
Create array of json objects using for loops
I'm attempting to extract values from an html and then convert them into a json array, and so far I have been able to get what I want, but only as separate strings:
I did two for loops:
for line in ...
- 203
19
votes
3
answers
15k
views
How can I access the nested data in this complex JSON, which includes another JSON document as one of the strings?
I have some JSON data like:
{
"status": "200",
"msg": "",
"data": {
"time": "1515580011",
"video_info": [
...
- 615
18
votes
6
answers
71k
views
Creating a list from JSON in Flutter
Following an online example I have the following code:
_fetchData() async {
setState(() {
isLoading = true;
});
final response = await http.get(
"https://apiurl...");
...
- 3,136
18
votes
2
answers
49k
views
How to convert c# generic list to json using json.net?
I am converting my datatable to c# generic list.
DataTable dt = mydata();
List<DataRow> list = dt.AsEnumerable().ToList();
Now how can i convert this list to json using json.net? Any ...
- 35.1k
17
votes
3
answers
162k
views
How to add an element to a list?
From this..
data = json.loads(urlopen('someurl').read())
...I will get:
{'list': [{'a':'1'}]}
I want to add {'b':'2'} into the list.
Any idea how to do it?
- 37.2k
15
votes
2
answers
49k
views
Generating a json in a loop in python
I have some difficulties generating a specific JSON object in python.
I need it to be in this format:
[
{"id":0 , "attributeName_1":"value" , "attributeName_2&...
- 7,472
15
votes
1
answer
18k
views
Use nlohmann json to unpack list of integers to a std::vector<int>
I'm using nlohman::json.
It's awesome, but is there any way to unpack:
{
"my_list" : [1,2,3]
}
into a std:vector<int> ?
I can't find any mention in the docs, and std::vector<...
- 29.8k
14
votes
4
answers
23k
views
Display JSON data on a page as a expandable/collapsible list
I need help with with displaying JSON data on a page like expandable/collapsible list.
Here is a valid JSON I`ve made converting from XML with Python:
JSON Data
And to display it I`m usig this:
&...
- 141
14
votes
2
answers
67k
views
Return Json from Generic List in Web API
I build my list like this:
public static List<SearchFormula> SearchData(string searchString)
{
var searchResults = new List<SearchFormula>();
SqlDataReader drResults = ...
- 211
13
votes
1
answer
53k
views
C# How To return List<> As Json
I am having problem with Json and Lists
I am trying to return a list of Chat Entity class but when i try to return it the compiler whines.
I also tried to return IEnumerable<> but the same error ...
- 135
11
votes
4
answers
45k
views
Using Python to extract dictionary keys within a list
I received a list when inputting the following URL - http://api.twitter.com/1/trends/44418.json
The list contains multiple dictionaries, and I'm a bit confused with the list structure. I'm trying to ...
- 663
11
votes
5
answers
26k
views
more pythonic way to format a JSON string from a list of tuples
Currently I'm doing this:
def getJSONString(lst):
join = ""
rs = "{"
for i in lst:
rs += join + '"' + str(i[0]) + '":"' + str(i[1]) + '"'
join = ","
return rs + "}"
...
- 1,113
11
votes
5
answers
134k
views
Parse JSON String into List<string>
string json = "{\"People\":[{\"FirstName\":\"Hans\",\"LastName\":\"Olo\"}
{\"FirstName\":\"Jimmy\",\"LastName\":\"Crackedcorn\"}]}";
var obj = JObject.Parse(json);
List&...
- 163
11
votes
4
answers
18k
views
how to parse complex json in flutter
I have trouble getting data from a complex json, below is the json in the request.
{
"results":{
"TotalRecordCount":"1",
"Records":[
{
...
- 121
11
votes
4
answers
46k
views
Read Json data from text file C#
I have a text file with below format data
[
{
"SponsorID": 1,
"FirstBAID": 7395836
},
{
"SponsorID": 2,
"FirstBAID": 3509279,
"SecondBAID": ...
- 722
11
votes
3
answers
36k
views
Java List to JSON array using Jackson with UTF-8 encoding
Now I'm trying to convert Java List object to JSON array, and struggling to convert UTF-8 strings. I've tried all followings, but none of them works.
Settings.
response.setContentType("application/...
- 477
10
votes
4
answers
37k
views
Remove duplicate JSON objects from list in python
I have a list of dict where a particular value is repeated multiple times, and I would like to remove the duplicate values.
My list:
te = [
{
"Name": "Bala",
"phone": "None"
...
- 2,378
10
votes
2
answers
35k
views
C# serialize and deserialize json to txt file
I'm using NewtonSoft for handling json in my wpf application. I've got a customer that can be saved to a txt file (no database involved). I'm doing that like this:
public int store(string[] ...
- 1,841
9
votes
2
answers
47k
views
The JSON value could not be converted to System.Collections.Generic.List
I am trying to make a list of all items in the game using System.Text.Json;
I am very new to using .json files
I have tried doing this to test if it works:
List<Item> AllItems = new ...
- 103
9
votes
1
answer
3k
views
Lift Framework can't deserialize JSON data
I'm trying to deserialize JSON text using the Lift framework, and it doesn't appear that they support Seq trait (although List is supported). As an example...
Some JSON data representing employees (...
- 1,628
9
votes
1
answer
9k
views
JSON deseralization to abstract list using DataContractJsonSerializer
I'm trying to deserialize a JSon file to an instance of a class that contains an abstract list. Serializing the instance to the Json works well (check the json file below). When deserializing I get a "...
- 335
9
votes
2
answers
228
views
Convert redundant array to dict (or JSON)?
Suppose I have an array:
[['a', 10, 1, 0.1],
['a', 10, 2, 0.2],
['a', 20, 2, 0.3],
['b', 10, 1, 0.4],
['b', 20, 2, 0.5]]
And I want a dict (or JSON):
{
'a': {
10: {1: 0.1, 2: 0.2},
...
- 2,233
9
votes
4
answers
6k
views
jackson xml lists deserialization recognized as duplicate keys
I'm trying to convert xml into json using jackson-2.5.1 and jackson-dataformat-xml-2.5.1
The xml structure is received from web server and unknown, therefore I can't have java class to represent the ...
- 6,957
8
votes
1
answer
60k
views
Deserializing JSON object into a C# list
I'm trying to deserialize a given JSON file in C# using a tutorial by Bill Reiss. For XML data in a non-list this method works pretty well, though I would like to deserialize a JSON file with the ...
- 83
8
votes
1
answer
24k
views
How to read data from json on C#
I have the following json Object that I pass to my c# server
[
{
"ID": 1,
"FirstName": "Jay",
"LastName": "Smith"
},
{
"ID": 2,
"FirstName": "Rich",...
- 1,367
8
votes
3
answers
5k
views
Why should I take List<> instead of array in JSON deserialization ?
First of all let me tell you one thing that I am posting this question is just for eagerness and to increase my knowledge. Hope you can clear my doubts !
Now lets come to the point
I got this ...
- 2,788
7
votes
2
answers
14k
views
How to create a list of the dictionaries in Golang?
I'm a newbie in Golang.
I'm going to create a list of dictionaries that is resizable (this is not static) with append some dict to the list. Then I want to write it on a file, but I was confused.
I ...
- 30.3k
7
votes
3
answers
17k
views
Java - Object Mapper - JSON Array of Number to List<Long>
In my front end I send this JSON:
"ids": [ 123421, 15643, 51243],
"user": {
"name": "John",
"email": "[email protected]"
}
To my Spring Endpoint below:
@PostMapping(value = "/sendToOficial")
...
- 569
7
votes
1
answer
7k
views
Using lift-json, is there an easy way to extract and traverse a list?
I think I may be missing something fundamental from the list-json xpath architecture. The smoothest way I've been able to extract and traverse a list is shown below. Can someone please show me a ...
- 8,993
7
votes
1
answer
17k
views
Using python f-string in a json list of data
I need to push data to a website through their API and I'm trying to find a way to use F-string to pass the variable in the data list but couldn't find a way.
Here's what I've tried so far:
today = ...
- 301
7
votes
2
answers
1k
views
How to convert a dataframe into a nested list?
I have a dataframe that I want to convert to a nested list with a custom level of nesting. This is how I do it, but I'm sure there is a better way:
data <- data.frame(city=c("A", "A", "B", "B"), ...
- 13.9k
7
votes
2
answers
7k
views
How to Use JSON Accumulate Method With List?
I am trying below code....
public String listToJsonString(String keyName, List<StyleAttribute> attrs) {
JSONObject json = new JSONObject();
json.accumulate(keyName, attrs);
...
user2185851
7
votes
1
answer
1k
views
Update Sharepoint 2013 using Python3
I am currently trying to update a Sharepoint 2013 list.
This is the module that I am using using to accomplish that task. However, when I run the post task I receive the following error:
"b'{"error"...
6
votes
2
answers
20k
views
Convert scala list to Json object
I want to convert a scala list of strings, List[String], to an Json object.
For each string in my list I want to add it to my Json object.
So that it would look like something like this:
{
"...
- 2,438
6
votes
2
answers
2k
views
java/jackson - don't serialize wrapping class
When serializing a list of string with Jackson library, it provides correctly a JSON array of strings:
<mapper>.writeValue(System.out, Arrays.asList("a", "b", "c"));
[ "a", "b", "c" ]
However,...
user4402596