reverse_each.rb

[:a,:b,:c].reverse_each.with_index do |item,index|
  puts "#{item} #{index}"
end

# c 0
# b 1
# a 2

module Enumerable
  def each_with_reverse_index
    each_with_index do |item,index|
      countdown_index = length - 1 - index
      yield item, countdown_index
    end
  end
end

[:a,:b,:c].each_with_reverse_index do |item,index|
  puts "#{item} #{index}"
end

# a 2
# b 1
# c 0

I want output like the following:

# a 2
# b 1
# c 0