Loop through associative array in reverse

Question

I\'m using a javascript associative array (arr) and am using this method to loop through it.

for(var i in arr) {
    var value = arr[i];
    alert(i =\") \"+         


        

Answer 1

For a normal array, I would have done this:

var i = arr.length;
while (i--) {
    var value = arr[i];
    alert(i =") "+ value);
}

This is faster than a "for" loop.

http://blogs.oracle.com/greimer/entry/best_way_to_code_a