browsing and extracting information from JSON datasets

Question

browsing and extracting information from JSON datasets

Currently, I am utilizing ajax to fetch a json string from the server and then employing eval to convert it into an object. However, when I loop through the data obtained from the json, only the key is displayed. Is there a way to extract the value associated with each key? Below is my existing code snippet:

var jsonObject = eval('(' + xmlhttp.responseText + ')');

for (i in jsonObject){
     alert(i);
}

As per the above code, only the keys are alerted. How can I access the values corresponding to these keys?

javascript ajax json

Answer 1

Answer №1

To access a specific element in a JSON object, use sub-script notation: jsonobj[i]

Answer 2

To access a specific element in a JSON object, use sub-script notation: jsonobj[i]

Answer 3

Answer №2

Give this a shot:

let jsonData = JSON.parse(xmlhttp.responseText);
let data;

for (key in jsonData){
     data = jsonData[key];
}

Answer 4

Give this a shot:

let jsonData = JSON.parse(xmlhttp.responseText);
let data;

for (key in jsonData){
     data = jsonData[key];
}

Answer 5

Answer №3

When the server responds with JSON data, there is no need to utilize eval. All you have to do is specify the dataType parameter in your jQuery AJAX call, and jQuery will automatically parse the returned result for you:

$.ajax({
    url: '/data',
    type: 'GET',
    dataType: 'json',
    success: function(response) {
        for (var prop in response) {
            if (response.hasOwnProperty(prop)) {
                console.log('Property: ' + prop + ', Value: ' + response[prop]);
            }
        }
    }
});

Answer 6

When the server responds with JSON data, there is no need to utilize eval. All you have to do is specify the dataType parameter in your jQuery AJAX call, and jQuery will automatically parse the returned result for you:

$.ajax({
    url: '/data',
    type: 'GET',
    dataType: 'json',
    success: function(response) {
        for (var prop in response) {
            if (response.hasOwnProperty(prop)) {
                console.log('Property: ' + prop + ', Value: ' + response[prop]);
            }
        }
    }
});

Answer 7

Answer №4

let jsonData = eval('(' + xmlhttp.responseText + ')');

for (item in jsonData){
    console.log(jsonData[item]);
}

Answer 8

let jsonData = eval('(' + xmlhttp.responseText + ')');

for (item in jsonData){
    console.log(jsonData[item]);
}

browsing and extracting information from JSON datasets

Answer №1

Answer №2

Answer №3

Answer №4

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