Ruby重启阵列循环

Question

我试图在整个数组迭代完毕后重新启动ruby中的数组循环.

我发现该retry方法不适用于此.代码如下:

letters = ["A","B","C"]

letters.each do |letter|
  puts letter
  if letter == letters.last
    puts "that was the last letter"
    #restart the array from A again (I'd like it to continue looping infinitely)
  end
  sleep 1
end

任何想法将不胜感激.谢谢!

Answer 1

使用cycle.

letters.cycle do |letter|
  ...
end

Answer 2

只需将each循环放入另一个循环:

loop do
  letters.each do |letter|
    puts letter
    sleep 1
  end
  puts "that was the last letter"
end