From: Vincent Stowbunenko <lists@...>
Date: 2013-03-29T23:40:28+09:00
Subject: Program with shuffle program

I am trying to make my own shuffle method instead of the build-in one.
From looking at the debugging program, the recursive_shuffle does not
return when unshuffled.length == 0.  What went wrong there?

See code below:

[CODE]
class Array

  def shuffle
    return self if self.length < 1
    recursive_shuffle self, []
  end

  def recursive_shuffle unshuffled, shuffled
    random_index = rand(unshuffled.length)
    shuffled << unshuffled.slice!(random_index)
    return shuffled if unshuffled.index == 0
    recursive_shuffle unshuffled, shuffled
  end

end

words = ['history', 'downstairs', 'adapter', 'mist', 'circumstance',
'coast', 'fender', 'war', 'alcohol', 'attendance']
puts words.shuffle
[\CODE]

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