From: jjthrash@...
Date: 2001-03-06T23:00:40+09:00
Subject: [ruby-talk:12130] Weird Array behavior

Hello,

I have the following code:

<code>
array = [[12345, "val"],[23456, "val2"],[34567, "val3"],[45678,"val4"]]
oldArray = array
array = Array.new((oldArray.size.to_f/3).ceil, Array.new(2))
oldArray.each_with_index do |entry, index|
   if array[(index.to_f/3).floor][0] == nil
      array[(index.to_f/3).floor][0] = entry[0]
      #INSPECTION POINT
      array[(index.to_f/3).floor][1] = entry
   else
      array[(index.to_f/3).floor][0] |= entry[0]
      array[(index.to_f/3).floor][1].push(entry)
   end

   p array
end
</code>

If I debug and step up to the first time I reach the INSPECTION
POINT, I expect the value array to be
[[12345, nil], [nil, nil]], but it's actually
[[12345, nil], [12345, nil]]

This seems to be very wrong, according to what I understand.  Can
anyone help me out?

Thanks in advance,

Jimmy

PS - the above code is a translated part of a signature tree
algorithm I'm implementing, just so you understand why on earth
I'd want to do what I was doing.  :)

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