From: Brian Candler <b.candler@...>
Date: 2009-07-22T00:10:44+09:00
Subject: Re: Mean method

Älphä Blüë wrote:
> Let me know what you think.
> 
> http://pastie.org/553287

>> Mean.new([1,2,3,4,5]).arithmetic
NameError: undefined local variable or method `count_of_num' for 
#<Mean:0xb7bc6904 @arr=[1, 2, 3, 4, 5]>
  from (irb):25:in `arithmetic'
  from (irb):36
  from :0
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