From: Stefan Rusterholz <apeiros@...>
Date: 2007-07-19T08:39:11+09:00
Subject: Re: overriding nil?, curiosity

Matt Greer wrote:
> Maybe this is a dumb question, but I'm gonna give it a shot.
> 
> I was showing my friends how Ruby classes are always open and I did some
> dumb things like redefine Integer#+ to always return 5, and such. But 
> trying
> this:
> 
> NilClass.class_eval do
>   def nil?
>     false
>   end
> end
> 
> result in this: <irb code, snip>
> Taking a look at the code and I'm completely lost. Obviously Ruby itself
> depends on a usable definition of nil? I'm sure it depends on some key
> methods in String, Array etc to be defined as expected too. So I guess 
> there

Nope, not ruby. IRB. Because IRB is written in ruby.

Regards
Stefan

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