From: Ryan Davis <ryand-ruby@...>
Date: 2007-06-22T16:54:29+09:00
Subject: Re: eval going boom


On Jun 20, 2007, at 17:19 , Giles Bowkett wrote:

> Object X is going to be an exact clone of Object Y, but it's a member
> of a different class.
>
> This does not work:
>
> x.attributes.each {|attr, value| eval("y.#{attr}= #{value}")}

 >> p x.class
=> CommandsIShouldNeverEval
 >> p x.attributes
=> { :z => "`rm -rf /`" }
 >> x.attributes.each {|attr, value| eval("y.#{attr}= #{value}")}
...

Don't use eval. There is no need in this example.

CHALLENGE: rewrite the above code to not use eval at all. For that  
matter, don't even use #send.