From: kieran kirwan <kieran.kirwan@...>
Date: 2006-01-26T10:58:15+09:00
Subject: simple newbie question

Hi,
I have a piece of code below in which I;
1.....make a new NumberList object and append two MyNumber objects.
2.....copy the NumberList object and append a further MyNumber object.
However after this both objects are the same.
Any help would be greatly appreciated.
Thanks,
Kieran

---------------------------------------------------
class MyNumber
	def initialize(x)
	@x=x
	end
	attr_accessor :x
end
class MyNumberList
  def initialize
  @nums = Array.new
  end
  def append(num)
  	@nums.push(num)
  	self
  end
  def sum
	sum=0
	@nums.each {|s|	sum += s.x }
	return sum
  end
end

zl1=MyNumberList.new; zl1.append(MyNumber.new(10)); 
zl1.append(MyNumber.new(20))
puts zl1.sum
zl2=zl1; zl2.append(MyNumber.new(40))
puts zl1.sum
puts zl2.sum

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