From: 7stud -- <lists@...>
Date: 2012-12-28T17:32:07+09:00
Subject: Re: Ruby Koans regarding Hashes.

hash = Hash.new do |hash, key|
  arr = []
  p arr.object_id
  hash[key] = arr
end

p hash[:one].object_id
p hash[:two].object_id

p hash

--output:--
2156082500
2156082500
2156082420
2156082420

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