CODEWITHSUNDEEP
javascriptarraysjson
arnoldssss
arnoldssss

Reputation: 488

Get some values in json array

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"

Upvotes: 0

Views: 47

Answers (3)

Tanya Gupta
Tanya Gupta

Reputation: 560

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

Upvotes: 0

Ju66ernaut
Ju66ernaut

Reputation: 2691

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");

Upvotes: 1

MarkSkayff
MarkSkayff

Reputation: 1384

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
    }
}

Upvotes: 1

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