Reading data from Array in Javascript

Question

I am trying to read data which I have received from a JSON object in the following format:

  var series = [{"Data":{"ArrayData":null,"DoubleArrayData":["\/Date(1481846400090)\/",1,"\/Date(1481846400100)\/",1,"\/Date(1481846400110)\/",1,"\/Date(1481846400120)\/",1],"Points":null,"SeriesData":null}, {"Data": ... }, {"Data": ... }];

I have tried doing the following in order to read the Data in the "DoubleArrayData" field:

 var ns = series[0].Data[1].DoubleArrayData[0];

However it returns undifined. What am I doing wrong?

Possible duplicate of [Access / process (nested) objects, arrays or JSON](http://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json) — Teemu, Jan 24 '17 at 16:26

score 2 · Answer 1 · answered Jan 24 '17 at 16:28

Data is not an array, so you should access it's properties directly series[0].Data.DoubleArrayData[0]

var series = [{
  "Data": {
    "ArrayData": null,
    "DoubleArrayData": ["\/Date(1481846400090)\/", 1, "\/Date(1481846400100)\/", 1, "\/Date(1481846400110)\/", 1, "\/Date(1481846400120)\/", 1],
    "Points": null,
    "SeriesData": null
  }
}];

console.log(series[0].Data.DoubleArrayData[0]);

score 1 · Answer 2 · answered Jan 24 '17 at 16:26

1

No need to add [0] to Data as it is an Object property, not an array:

series[0].Data.DoubleArrayData[0]
// Returns "/Date(1481846400090)/"

answered Jan 24 '17 at 16:26

Antony

1,253
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score 1 · Answer 3 · answered Jan 24 '17 at 16:26

1

Data is not an array, you don't have to use [1] (it should be used on array to get the index):

var ns = series[0].Data.DoubleArrayData[0];

answered Jan 24 '17 at 16:26

Mistalis

17,793
13
73
97

score 0 · Accepted Answer · answered Jan 24 '17 at 16:25

0

In your json object , Data is Object not an Array

var ns = series[0].Data.DoubleArrayData[0]

answered Jan 24 '17 at 16:25

Vladu Ionut

8,075
1
19
30

score 0 · Answer 5 · answered Jan 24 '17 at 16:34

You are not accessing the json object correctly.

Your example json object:

var series = [{"Data":{"ArrayData":null,"DoubleArrayData":["\/Date(1481846400090)\/",1,"\/Date(1481846400100)\/",1,"\/Date(1481846400110)\/",1,"\/Date(1481846400120)\/",1],"Points":null,"SeriesData":null}}];

To access "DoubleArrayData field

var ns = series[0]['Data']['DoubleArrayData']

Reading data from Array in Javascript

5 Answers5