From: ara.t.howard@...
Date: 2006-02-14T03:05:25+09:00
Subject: Re: inspecting cyclic structures

On Tue, 14 Feb 2006, konsu wrote:

> hello,
>
> is there  a way to inspect an object only to a given depth to avoid infinite
> loops in case of referential loops? like irb does:
>
> irb(main):001:0> a = Object.new
> => #<Object:0x2be6cd0>
> irb(main):002:0> b = Object.new
> => #<Object:0x2be4900>
> irb(main):003:0> a.instance_variable_set(:@b, b)
> => #<Object:0x2be4900>
> irb(main):004:0> b.instance_variable_set(:@a, a)
> => #<Object:0x2be6cd0 @b=#<Object:0x2be4900 @a=#<Object:0x2be6cd0 ...>>>
> irb(main):005:0> a.inspect
> => "#<Object:0x2be6cd0 @b=#<Object:0x2be4900 @a=#<Object:0x2be6cd0 ...>>>"
> irb(main):006:0>
>
> thanks
> konstantin


   harp:~ > cat a.rb
   a = Object.new
   b = Object.new
   a.instance_variable_set(:@b, b)
   b.instance_variable_set(:@a, a)

   p a
   require "yaml" and y a
   require "pp" and pp a


   harp:~ > ruby a.rb
   #<Object:0xb75cdc64 @b=#<Object:0xb75cdc50 @a=#<Object:0xb75cdc64 ...>>>
   --- &id001 !ruby/object
   b: !ruby/object
     a: *id001
   #<Object:0xb75cdc64 @b=#<Object:0xb75cdc50 @a=#<Object:0xb75cdc64 ...>>>



hth.

-a

-- 
judge your success by what you had to give up in order to get it.
- h.h. the 14th dali lama