From: James Edward Gray II <james@...>
Date: 2010-11-03T03:51:26+09:00
Subject: Re: the dark side of inherited methods

On Nov 2, 2010, at 1:25 PM, Joel VanderWerf wrote:

> On 11/02/2010 11:12 AM, James Edward Gray II wrote:
>>   A = Struct.new(:x, :y, :z) do
>>     def length
>>       Math.sqrt(x**2 + y**2 + z**2)
>>     end
>>   end
> 
> How do you fix this?
> 
> A = Struct.new :x, :y, :z do
>  def length
>    Math.sqrt(x**2 + y**2 + z**2)
>  end
> 
>  def x=(new_x)
>    raise ArgumentError if new_x > 100
>    super
>  end
> end
> 
> a = A.new
> a.x = 1 # NoMethodError

Good question.  It works to replace super with:

  self[:x] = new_x

I realize that's not an ideal solution though.

James Edward Gray II