From: Robert Klemme <shortcutter@...>
Date: 2009-12-22T23:49:24+09:00
Subject: Re: integers and floats

2009/12/22 Florian Gilcher <flo@andersground.net>:
>
> On Dec 22, 2009, at 11:03 AM, Paul Smith wrote:
>
>> On Tue, Dec 22, 2009 at 2:16 PM, Rajinder Yadav <devguy.ca@gmail.com> wrote:
>
>> I have no idea what, if anything, has the object_ids 0, and 2.
>
> Pretty easy: false and true.
>
> irb(main):001:0> true.object_id
> => 2
> irb(main):002:0> false.object_id
> => 0

You need to know but there is a way that works without oracle turing machine:

irb(main):005:0> 10.times {|i| printf "%4d %p\n", i,
ObjectSpace._id2ref(i) rescue nil}
   0 false
   1 0
   2 true
   3 1
   4 nil
   5 2
   7 3
   9 4
=> 10

:-)

Kind regards

robert


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