IE9 associative array

Question

Fruit={4:"apple",2:"banana",3:"graps"}; 
var k;
for(k in Fruit)
{alert(k);}

alert will be 2 3 4 in sequence in Ie9 when In IE8 & FF & other browse give 4 2 3 help me out of this. I need sequence is 4 2 3

Answer 1

You cannot control the order that keys come out of an object in JavaScript. If you care about the order, put the keys in a separate array:

var fruit = { 4:"apple", 2:"banana", 3:"grapes" };
var fruitKeys = [ 4, 2, 3 ]
for (var i=0, l=fruitKeys.length; i<l; ++i) {
  var k = fruitKeys[i];
  alert(k + ":" + fruit[k]);
}

(as a point of style, you also shouldn't capitalize variable names; use capitals only for functions that you're using as constructors/"classes").

fiddle

Answer 2

Associative arrays don't have order, so IE9's behavior here is not incorrect. There is no existing data type that can store the order this way. Your best bet would be to store the order explicitly:

var Fruit = [[4, "apple"], [2, "banana"], [3, "graps"]];
for (var i = 0; i < Fruit.length; i++) {
    alert(Fruit[i][0]);
}