If you have a well-formed JSON string, you should be able to do

var as = JSON.parse(jstring);

I do this all the time when transfering arrays through AJAX.

var json = jQuery.parseJSON(s); //If you have jQuery.

Since the comment looks cluttered, please use the parse function after enclosing those square brackets inside the quotes.

var s=['{"Select":"11","PhotoCount":"12"}','{"Select":"21","PhotoCount":"22"}'];

Change the above code to

var s='[{"Select":"11","PhotoCount":"12"},{"Select":"21","PhotoCount":"22"}]';

Eg:

$(document).ready(function() {
    var s= '[{"Select":"11","PhotoCount":"12"},{"Select":"21","PhotoCount":"22"}]';

    s = jQuery.parseJSON(s);

    alert( s[0]["Select"] );
});

And then use the parse function. It'll surely work.

EDIT :Extremely sorry that I gave the wrong function name. it's jQuery.parseJSON

Jquery

The json api

Edit (30 April 2020):

Editing since I got an upvote for this answer. There's a browser native function available instead of JQuery (for nonJQuery users), JSON.parse("<json string here>")

Something like this maybe: http://jsfiddle.net/3gcg6Lbz/1/

var arr = new Array();
var obj = {
  "data": [
    {
      "id": "1", "name": "test"
    },
    {
      "id": "2", "name": "test2"
    }
  ]
}

for(var i in obj.data) {
  var thisArr = new Array();
  thisArr.push(obj.data[i].id);
  thisArr.push(obj.data[i].name);
  arr.push(thisArr);
}

console.log(arr);

The best way is to do:

var obj = {"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0}
var result = Object.entries(obj);

console.log(result);

Calling entries, as shown here, will return [key, value] pairs, as the caller requested.

Alternatively, you could call Object.values(obj), which would return only values.

var data = {
    a:{"0": "1"},
    b:{"1": "2"},
    c:{"2": "3"},
    d:{"3": "4"}
};

var myData = Object.keys(data).map(key => {
    return data[key];
})

This works for me

You could use Object.values directly as callback, which is available with ES 2017

var array = [{ one: "text1", two: "text2", three: 3, four: 4 }, { one: "text3", two: "text4", three: 5, four: 6 }, { one: "text5", two: "text7", three: 8, four: 9 }],
    result = array.map(Object.values);
                
console.log(result);

A classical approach

var array = [{ one: "text1", two: "text2", three: 3, four: 4 }, { one: "text3", two: "text4", three: 5, four: 6 }, { one: "text5", two: "text7", three: 8, four: 9 }],
    result = array.map(o => Object.keys(o).map(k => o[k]));
                
console.log(result);