Get some values in json array

Question

I have a json that looks like this. How can I retrieve the information inside the group "demo", without looking into the array like: json['data'][0] I wanted to retrieve the info reading the first value.. "group" and if it matches demo, get all that group info.

 {
      "filter": "*",
      "data": [
        {
          "group": "asdasd",
          "enable": 1,
          "timeout": 7,
          "otpMode": 0,
          "company": "cool",
          "signature": "ou yeah",
          "supportPage": "",
          "newsLanguages": [
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0
          ],
          "newsLanguagesTotal": 0
        },
        {
          "group": "demo",
          "enable": 1,
          "timeout": 7,
          "otpMode": 0,
          "company": "pppppooo",
          "signature": "TTCM",
          "supportPage": "http://www.trz<xa",
          "newsLanguages": [
            0,
            0
          ],
          "newsLanguagesTotal": 0
        }
      ]
    }

So long I have:

   let json = JSON.parse(body);
    //console.log(json);
    console.log(json['data'][1]);

Which access to "demo"

Are you asking how you would find all the objects in the data array where the 'group' property is "demo"? — Ju66ernaut
– Ju66ernaut, Commented Jan 31, 2017 at 22:44
yes, but looking for that value in a loop ... not directly like json['data'][1] — arnoldssss
– arnoldssss, Commented Jan 31, 2017 at 22:45

MarkSkayff · Accepted Answer · 2017-01-31 22:44:47Z

1

Process each "data item" and check for the group value. If it matches, then do something.

var json = JSON.parse(jsonStr);

for(var i=0;i<json.data.length;i++){
    if(json.data[i].group == "demo"){
        var group = json.data[i];
        // Process the group info
    }
}

answered Jan 31, 2017 at 22:44

MarkSkayff

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Comments

Ju66ernaut · Accepted Answer · 2017-01-31 22:46:56Z

1

I suggest you use the filter()

json.data.filter(function(item){
    return item.group === "demo";
});

this will return the objects that have "demo" in the group property

Or if you want to get fancy es6 with it

json.data.filter(item => item.group === "demo");

answered Jan 31, 2017 at 22:46

Ju66ernaut

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Comments

Tanya Gupta · Accepted Answer · 2017-02-01 17:07:10Z

0

If the key "group" is missing for any of the records, a simple check (similar to the code provided by @MarkSkayff) will give an error. To fix this, check to see if json["data"][i] exists and check if json["data"[i]["group"] also exists

function json_data(){

  var res=[]
  for (var i in json["data"]){ 
  if(json["data"][i] && json["data"][i]["group"] === "demo"){ //strict comparison and boolean shortcircuiting
   res.push(json["data"][i]) 
  }    
 }
 console.log(res)
}

The result is stored in res

Not enough space here but for more on boolean short circuiting read this explanation of dealing with irregular JSON data

answered Feb 1, 2017 at 17:07

Tanya Gupta

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