> 
> The title is quite self explanatory: I am in
> 
> dummy_array.each do |a|
> #code here
> end
> 
> and I want to know which element (the number n in nth element) of the
> dummy_array.
> 

You could just put a counting variable in there:


i = 0
> dummy_array.each do |a|
i = i+1
> #code here
> end

You can also use each_index on the array if you'd like.

http://ruby-doc.org/core/classes/Array.html#M002174