Howto convert JSON to Array

Question

This is my first question to StackOverflow. I think answer is not so complicate, but I am very new to Javascript.

I have a JQuery AJAX function that parses this JSON object:

{
 "Users":[
 {
 "key":"1",
 "label":"Tom Clancy"
 },
 {
 "key":"12",
 "label":"Steve Martin"
 }
 ]
}

and should obtain the same result as:

var sections = [{
 key: 1,
 label: "Tom Clancy"
 }, {
 key: 12,
 label: "Steve Martin"
 }
];

I'm able to iterate through JSON element, but i don't know how to go on.

Can you provide suggestions?

EDIT: i can't still get it work...this is my code:

 var sections=[
 {key:1, label:"Section A"},
 {key:2, label:"Section B"},
 {key:3, label:"Section C"},
 {key:4, label:"Section D"}
 ];
 $.ajax({
 url: '/WebOffice/ListaUtenti',
 type: "POST",
 dataType: 'json',
 success: function (data) 
 {
 console.log( "success" );
 sections = data.Users;
 }});
 scheduler.createTimelineView({
 name: "matrix",
 x_unit: "day",
 x_date: "%d %M",
 x_step: 1,
 x_size: 15,
 y_unit: sections,
 y_property: "section_id"
 });

The jquery ajax call doesn't assign the new value to sections (the call state is success, verified) and so scheduler still shows the original sections. Where i'm wrong?

thanks

• Dogbert: var sections = json_object.Users?
• adeneo: To convert it to array you'd do var arr = $.makeArray(object), but there's really no reason to as you can access the object just as easily.
• Nick Cardoso: First I would take a look at an article on associative arrays - if youre a beginner this one will sufffice - blog.xkoder.com/2008/07/10/… You should also post the code you have, then I/others will edit/post our answers and help you fix what you have
• LucaCDO: So simple?? I'm really very new to javascript...thank you very much!
• Michael Geary: That xkoder page is a terrible article, full of misconceptions and bad practices. I don't have time to explain the details right now, but will follow up later if anyone is interested. In the meantime: Not recommended.

Answer 1

I will explain you the process. Go to any online JSON formatter, may be this one and pretty print your JSON. It will appear as.

{
 "Users":[
 {
 "key":"1",
 "label":"Tom Clancy"
 },
 {
 "key":"12",
 "label":"Steve Martin"
 }
 ]
}

So Users is an array of objects. Users[0] is first object and Users[1] is second object. So you can iterate the JSON easily and obtain the result you want.

Live demo : http://jsfiddle.net/sbymr/

See the console for the output.

• charlietfl: Users[0] is not an array...it is an object with properties key and label