Query : How to Count the Value or No of Items in Select List

[Rase In]

Hi Everybody...

I am new to Ruby, Watir

i am automating a web based application

1. My web page has Drop down list box or Select list box
2. It has 10 items ( Eg: 10 Diff car names Audi, BMW, Mazda etc) or it
can contain N of Cars also


Scenario

1. After selecting the car, the page gets refreshed and i have to write
the details of the car in the Excel sheet ...like this it happens for
every car
before this i have know No of Car available in the List;
2. After having the Car Count can loop for N no of Cars

is there anyway to Count no of items in the Select List using the VALUE

1st CAR : Value = 0
2nd CAR : Value = 1
3rd CAR : Value = 2
4th CAR : Value = 3

Please help me out

Regards
Rafiq