Reading values from JSON objects in javascript

Question

I have the following JS code:

var response = loadXMLDoc();
var dataset = response.data;
alert(response);
alert (dataset);

"alert(response)" prints this:

{"labels":["-inf - 10","10 - 20","20 - 30","30 - 40","40 - 50","50 - 60","60 - 70","70 - 80","80 - 90","90 - 100","100 - 110","110 - 120","120 - 130","130 - 140","140 - 150","150 - 160","160 - +inf"],"data":[3,8,7,3,7,6,6,7,5,4,10,7,4,4,7,2,0],"count":16} 

while "alert(dataset)" gives "undefined". I have tried to use

 var dataset = response["data"]; 

but it did not work as well. I want to get the data array from the JSON object. How can i do that. Thanks

• Felix Kling: You have to parse the JSON into a JavaScript object first. See how to parse json in javascript. Also note that there is no key data in the JSON (only labels and count).
• Sami: @Felix KlingThanks.. it worked. data key is there though.

Answer 1

Use var y = JSON.parse(response); alert(y["data"])

Answer 2

Seeing that you got alert to show response, it's a string, not yet an object.

You need to parse it with JSON.parse()

//load your response
var response = loadXMLDoc(),
 dataset;
//parse response
response = JSON.parse(response);
//assign data to dataset
dataset = response.data;
//Hit F12 to see the console
console.log(response);
console.log(dataset);

​ Here's a sample

• Jill-Jênn Vie: Your jsFiddle ID is quite insulting to Europeans.
• Joseph: @Jill-JênnVie lol, tell that to JSFiddle. It's not my fault XD

Answer 3

Try this

var dataset = eval('(' + responce.data + ')');

• Daniele B: responce.d maybe you meant response.data?