From: "jay s." <solomon.jas@...>
Date: 2011-05-27T01:07:04+09:00
Subject: Re: Method that mutates object

I understand that using String#replace works for the String class, but 
what if you were writing a random method for Integer that takes a number 
and sets it equal to some other number.

Ex.

x = 7

class Integer
  def crazy
    ...set x to 5...
  end
end


now when you call x the value is 5

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