From: salamond <jarodzz@...>
Date: 2010-10-21T19:38:16+09:00
Subject: Re: about handling args in block

Thanks Jeremy, wax, and robert.

I wanner do this because this tree may not be a binary tree.
What if a node could link to a dozen nodes.

we have to something like this.
nodes.each do |node|
  node = nil
end



On Thu, Oct 21, 2010 at 4:00 PM, Robert Klemme
<shortcutter@googlemail.com> wrote:
> On Thu, Oct 21, 2010 at 6:10 AM, w_a_x_man <w_a_x_man@yahoo.com> wrote:
>> On Oct 20, 11:41 am, Robert Klemme <shortcut...@googlemail.com> wrote:
>>
>>> Node = Struct.new :value, :left, :right do
>>>
>>>    # We usually do not use prefix "is" which
>>>    # you might be used to in Java.
>>>    def leaf?
>>>      @left.nil? && @right.nil?
>>>    end
>>
>> Will that work? Or would it have to be
>>
>>    self.left.nil? && self.right.nil?
>
> No, my code won't work.  But this is sufficient:
>
> left.nil? && right.nil?
>
> It also needs to be
>
>  def visit(val = nil, &b)
>   val = left.visit(val, &b) if left
>   val = b[self, val]
>   val = right.visit(val, &b) if right
>   val
>  end
>
> Thanks for catching this!
>
> Kind regards
>
> robert
>
>
> --
> remember.guy do |as, often| as.you_can - without end
> http://blog.rubybestpractices.com/
>
>