gistfile1.rb

# recursive Hash#clone extension, because I needed it!

class Hash
  def clone(recursive = false)
    return super() unless recursive

    new_hash = {}

    for k, v in self
      key   = k.is_a?(Hash) ? k.clone(true) : (k.clone rescue k)
      value = v.is_a?(Hash) ? v.clone(true) : (v.clone rescue v)
      new_hash[key] = value
    end

    new_hash
  end
end