Parse JSON string into an array

Question

I'm trying to parse a string from JSON and turn those elements into an array in Javascript. Here's the code.

      var data = "{"fname":"Todd","lname":"James","cascade":"tjames","loc":"res","place":"home", "day0":"0,1,2,3,"}";
      var getDay = data.day0;
      var getDayArray = getDay.split(",");

Essentially, I'm trying to get day0, which is 0,1,2,3, and turn it into an array with a structure of

[0] = 0
[1] = 1
[2] = 2
[3] = 3

What is the best way to go about doing this?

First, your object markup is invalid. Second, what have you tried? — Robert
– Robert, Commented Jul 12, 2012 at 21:45
I'm not sure what you're hinting at here. I'm trying to take the day0 element out of JSON and put the numbers into an array. — Vikram
– Vikram, Commented Jul 12, 2012 at 21:46
Sorry, that was me; at first I thought it was a typo and I tried to correct it, but then I realized OP might actually have really screwy JSON code. — machineghost
– machineghost, Commented Jul 12, 2012 at 21:46

Mike Robinson · Accepted Answer · 2012-07-12 21:58:02Z

7

Something like this. Is that trailing comma intentional?

var getDayArray = JSON.parse(data).day0.split(",")

edited Jul 12, 2012 at 21:58

answered Jul 12, 2012 at 21:45

Mike Robinson

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2 Comments

Dancrumb Over a year ago

You missed the ',' in split()

Mike Robinson Over a year ago

Crap, for some reason my brain thought the ',' was the default

Dancrumb · Accepted Answer · 2012-07-12 21:47:07Z

1

Most modern browsers have support for JSON.parse(). You would use it thusly:

  var dataJSON = '{"fname":"Todd","lname":"James","cascade":"tjames","loc":"res","place":"home", "day0":"0,1,2,3"}'; // You need to remove the trailing comma
  var data = JSON.parse(dataJSON);
  var getDay = data.day0;
  var getDayArray = getDay.split(",");

However, it might be better to modify whatever is generating the value for dataJSON, to return

  var dataJSON = '{"fname":"Todd","lname":"James","cascade":"tjames","loc":"res","place":"home", "day0":[0,1,2,3]}';

answered Jul 12, 2012 at 21:47

Dancrumb

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Comments

Brandon Buck · Accepted Answer · 2012-07-12 21:52:30Z

1

This is built into most modern browser JavaScript engines. Depending on what environment you are targeting you can simply do:

var data = JSON.parse(jsonString);
day0 = data.day0.split(",");

It's pretty simple. If you are targeting environments that don't have access to a built in JSON object you should try this JSON project.

edited Jul 12, 2012 at 21:52

answered Jul 12, 2012 at 21:46

Brandon Buck

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