在EACH循环中查找当前索引（Ruby）

Question

  

可能重复：
  Automatic counter in Ruby for each?

我想在每个循环中查找当前索引。我该怎么做？

X=[1,2,3]

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

Answer 1

X.each_with_index do |item, index|
  puts "current_index: #{index}"
end

Answer 2

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