I'm looping through a set of invoice figures trying to calculate totals for tax.  I have this snippet of code in my loop to create an array/object on the fly and calc the total :-

1. ivaRates[(ivaRate)] = (ivaRates[ivaRate]===undefined? 0: ivaRates[ivaRate] )+ ivaValue;

When type ivaRates in the console, I get what I expect:-

7.00%                  35.179200000000044

16.00%                 0.5760000000000001

I was hoping to use $.each() to extract the key,value pairs, but my statement:-

2. $.each(ivaRates, function(key, value) { 
3. alert( key+ ': ' + value );
4. });

does not work, it doesn't iterate through the array.

I don't really know what I have create with the first statement - an array, an object.  Should this work and is there any other way I can retrieve the key.

Thanks