From: Martin Krauskopf <martin.krauskopf@...>
Date: 2007-08-15T21:08:51+09:00
Subject: Re: ruby-debug: 1) @-sign,  2) v i <object>

Axel wrote:
> Another thing, how does:
> 
>   v[ar] i[nstance] <object>
> 
> work? - When using the exampel of Brian Donovan, slightly modified:
> 
>     class My
>       def fib(n)
>         @fib_cache ||= [1, 1]
>         @fib_cache[n] ||= fib(n-1) + fib(n-2)
>       end
>     end
> 
>     my = My.new
>     puts my.fib(20)
> 
> and set a breakpoint, continue and enter "v i My", I do not get
> anything.

"v i <object>" list instance variables of the <object>

E.g. try to add one line at the end of you program, e.g. sleep 0.1, and 
put breakpoint on it. Then you get the array of fibonacci numbers 
@fib_cache listed  after "v i my".

"v i <object>" uses object.instance_variables and there are not any on 
My class, so you got nothing after "v i My"

	m.