From: Justin To <tekmc@...>
Date: 2008-06-13T01:06:35+09:00
Subject: Instance variables

class Trie
  attr_reader :value, :parent, :child_node
  def initialize(value=nil, parent=nil)
    @value = value
    @children = {}
    @parent = parent
    @child_node = @children       # ??? HERE
  end
end

# ??? HERE: Does it matter if I do @child_node = children (without the @
for children)? What's the difference with using the @ and not?

Thank you!!
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