From: Maxime Guilbot <maxime@...>
Date: 2007-01-24T19:34:54+09:00
Subject: Array and instance variable problem?

Look at the code below, I got strange results, I know that there is a
problem in the code but I can't find it. I expect to have an array like
this:

[[4, 4], [8, 1024], [1024, 1024], [1024, 1024], [1024, 1024], [1024,
1024], [1024, 1024], [1024, 1024], [1024, 1024], [1024, 1024]]

at the ouput of get_next_10...

Does someone has the idea?

Thanks a lot,
Maxime.

class Dummy
  def initialize
    @indexes = Array.new(2, 1)
  end

  def get_next
    @indexes[0] = @indexes[0]*2
    @indexes[1] = @indexes[1]*2

    @indexes
  end

  def get_next_10
    all = []
    for i in 0..9
      all << get_next
    end
    all
  end
end
=> nil

d = Dummy.new
=> #<Dummy:0x33b198 @indexes=[1, 1]>

d.get_next_10
=> [[1024, 1024], [1024, 1024], [1024, 1024], [1024, 1024], [1024,
1024], [1024, 1024], [1024, 1024], [1024, 1024], [1024, 1024], [1024,
1024]]

d.get_next
=> [2048, 2048]

d.get_next
=> [4096, 4096]

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