From: Eric Hodel <drbrain@...7.net>
Date: 2005-12-22T06:31:10+09:00
Subject: Re: A interesting obervation about object_id method

On Dec 21, 2005, at 5:00 AM, Dan Diebolt wrote:

> Anyone else notice that the object_id of an integer (at least for  
> Fixnum) is twice the integer plus 1?
>
>   irb(main):030:0> 1.object_id
> => 3
> irb(main):031:0> 2.object_id
> => 5
> irb(main):032:0> 6534.object_id
> => 13069
> irb(main):033:0> 2*6534+1
> => 13069

Using pointers to odd memory addresses a common way of representing  
integers.

non-Fixnums always have even ids since they are pointers to valid  
addresses.

nil, true and false have special values.

-- 
Eric Hodel - drbrain@segment7.net - http://segment7.net
This implementation is HODEL-HASH-9600 compliant

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