From: "James H." <lists@...>
Date: 2012-07-25T15:19:20+09:00
Subject: Re: Help with exercise from Chris Pine's Ruby Book: Sort without using .sort

Hello Jan E.,

Thank you very much for your help and crystal clear explanation. My 
misunderstanding of how variables work was the root cause of my 
confusion. Based on your advice building the recursive version of the 
sort only took me a few minutes. I really appreciate you taking the time 
to answer my questions.

James

My recursive sort: (ugly I'm sure)


def sort_wrap arr
sort_meth arr, []

end

def sort_meth unsorted, sorted
  if unsorted.length == 0
    return sorted
  end
  new_unsorted = []
  smallest = unsorted.pop

  unsorted.each do |testword|
    if testword < smallest
      new_unsorted.push smallest
      smallest = testword
    else
      new_unsorted.push testword
    end
  end
  sorted.push smallest
  unsorted = new_unsorted

  sort_meth new_unsorted, sorted
end

puts (sort_wrap(['beta',  'zeta',  'alpha',  'depha',  'cina',  'emma', 
'bonny',  'falco']))

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