From: Brian Xue <brxue.cn@...>
Date: 2011-05-17T11:24:31+09:00
Subject: Re: where does the pure method defined when starting irb

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Thank you very much, Michael!

Brian

On Tue, May 17, 2011 at 9:00 AM, Michael Edgar <adgar@carboni.ca> wrote:

> An instance variable doesn't get created until it is first assigned. So in
> this case, you
> have to call `hello` before @v will show up in `self.instance_variables`:
>
> puts self
> => main
> def hello
> @v = 1
> end
> => nil
> puts self.instance_variables
> => nil
> hello
> => 1
> puts self.instance_variables
> => @v
> => [:@v]
>
> Michael Edgar
> adgar@carboni.ca
> http://carboni.ca/
>
> On May 16, 2011, at 8:54 PM, Brian Xue wrote:
>
> > Can anyone help explain?
> >
> > Many thanks!
> >
> > Brian
>
>
>

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