array in javascript

Question

i have a piece of code like below

var abc = 
{
2: {label: "raju"},
10: {label: "samu"},
3:  {label: "sidh"}, 
1:  {label: "kat"}, 

};

for(var i in abc){ alert(i); }

in mozilla fire fox it alerts 2,10,3,1. but in chrome it shows 1,2,3,10

but my requirement is the first one (as shown in fire fox) what to do for getting the same result in chrome?

Answer 1

The order in which the "for(var i in ...)" retrieves the items is not defined. For an array-like behaviour you have to use an array ;)

var abc = [
  { nr: 2, label: "raju" },
  { nr: 10, label: "samu" },
  { nr: 3, label: "sidh" },
  { nr: 1, label: "kat" }
];

for (var i = 0, length = abc.length; i < length; i++)
   alert(abc[i].nr);