[ruby] Finding out current index in EACH loop (Ruby)

Possible Duplicate:
Automatic counter in Ruby for each?

I want to find out the current index while i am in the each loop. how do i do so?

X=[1,2,3]

X.each do |p|
 puts "current index..."
end 

x.each_with_index { |v, i| puts "current index...#{i}" }