unable to access value of JSON array in javascript

Question

In my javascript I am trying to read values from a JSON file from a server. The file contains a array of objects but I cannot access the values in these objects. When I try this my log says the value is undefined. However, when I try to stringify a Object in the array it works perfectly fine. What am I doing wrong?

The JSON file:

{
  "NETWORKS": [
    {
      "NETWORK": {
        "STARTDATE": "00:13:33:15:10:2015",
        "SSID": "Ziggo323_AC",
        "WPA": "YES",
        "WEP": "NO",
        "WPS": "YES",
        "OPEN": "NO",
        "WPATEST": {
          "DURATION": "3000",
          "DATE": "00:11:26:24:09:2015",
          "ATTEMPTS": "594",
          "STATUS": "FAILED"
        },
        "WPSTEST": {
          "DURATION": "2932",
          "DATE": "03:11:28:24:09:2015",
          "ATTEMPTS": "9",
          "STATUS": "PASSED"
        }
      }
    },
    {
      "NETWORK1": {
        "STARTDATE": "00:15:26:15:10:2015",
        "SSID": "FreeWiFi",
        "WPA": "NO",
        "WEP": "NO",
        "WPS": "NO",
        "OPEN": "YES"
      }
    }
  ]
}

The javascript function

function LoadTestResults() {
  $.ajax({
    type: 'POST',
    url: 'GetJSON.php',
    data: "TestResults.json",
    dataType: "json",
    success: function (data) {
      var wpsDuration = data.NETWORKS[0];
      console.log(JSON.stringify(wpsDuration)); // output ={"NETWORK":{"STARTDATE":"00:13:33:15:10:2015" etc.
      console.log(wpsDuration.WPA); // output = undefined
    }
  });
}

i think you need to access it like console.log(wpsDuration.NETWORK.WPA) instead of console.log(wpsDuration.WPA); — Ripun
– Ripun, Commented Oct 16, 2015 at 7:54

hsz · Accepted Answer · 2015-10-16 08:04:23Z

2

Just try with:

wpsDuration.NETWORK.WPA

or with a loop:

for (var k in data.NETWORKS) {
  var network = data.NETWORKS[k];
  var networkKey = Object.keys(network).pop();

  console.log(networkKey, network[networkKey].WPA);
}

edited Oct 16, 2015 at 8:04

answered Oct 16, 2015 at 7:47

hsz

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7 Comments

Rik Smits Over a year ago

That works thank you. But I want the function to be dynamical. If there are many networks (like network1, network 2) I want to be able to access them like NETWORKS[x]. Is there a way to do this?

Danmoreng Over a year ago

Loop through them and give them out for each.

hsz Over a year ago

So you have to loop this wpsDuration object. Check my edit.

Rik Smits Over a year ago

I have tried but it only gives me the value of the NETWORK and not NETWORK1. The console gives the output: NETWORK YES

hsz Over a year ago

@RikSmits You're right - I see the problem. Check my answer now.

|

Kaushik · Accepted Answer · 2015-10-16 07:48:58Z

0

Put a debugger; before this line var wpsDuration = data.NETWORKS[0]; and inspect the data.

Keep your console open while debugging. Once the success will reach debugger will hit.

then move to console window and try different combinations. This will help you to understand your object.

answered Oct 16, 2015 at 7:48

Kaushik

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Comments

Tushar Pillay · Accepted Answer · 2015-10-16 07:51:10Z

0

I tried and it worked for me

Put a debugger; before this line var wpsDuration = data.NETWORKS[0]; and inspect the data

answered Oct 16, 2015 at 7:51

Tushar Pillay

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1 Comment

abarisone Over a year ago

Could you please elaborate more your answer adding a little more description about the solution you provide?

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