Question

Possible Duplicate:
For..In loops in javascript – key value pairs

I need to loop through an array in order, just like in this question. However, I also need to get access to the key name. How can I do that while in a numerically indexed loop?

for(i=0; i<arr.length; i++){
    alert(arr[i].key); // clearly won't work
}

but

for(key in arr){
    alert(arr[key]); // works, but it doesn't loop through in the right order
}

Answer 1

You cannot list through an JavaScript object’s properties and expect them to be returned in a particular order.

Read this blog post and check out the part about for loop order.