Can I jump back to the beginning of a method using 'redo' in Ruby?

Question

In the Poignant Guide this example of the redo keyword is given:

class LotteryTicket
  def self.new_random
    new(rand(25) + 1, rand(25) + 1, rand(25) + 1)
  rescue ArgumentError
    redo
  end
end

It's supposed to keep calling new until all three random numbers are unique. But after I typed this code in and ran it a few times, I got this error: LocalJumpError: unexpected redo. I looked up the redo keyword elsewhere and it looks like it is only supposed to work for loops and iterators. So why did why try to use it like this in his example? How should this method be rewritten to work correctly?

Answer 1

He must have meant to use retry, not redo.

Answer 2

redo restarts a block:

l = lambda {puts "hi"; redo}
l.call