From: Eric Hodel <drbrain@...7.net>
Date: 2006-06-27T06:28:55+09:00
Subject: Re: Ruby and Java equality usage

On Jun 26, 2006, at 4:38 AM, Alexandru Popescu wrote:

> I have posted a quick (reminder like) entry about how equality is
> handled by Ruby and Java:
>
> http://themindstorms.blogspot.com/2006/06/parallel-of-equality-in-2- 
> worlds-ruby.html
>
> However, I feel I have missed to explain correctly why eql? and ==
> are both needed.

#eql? is used to resolve key collisions in hashes.

If two objects have the same #hash and are #eql? then they refer to  
the same hash key.  If two objects have the same #hash and are not  
#eql? they refer to different hash keys.

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

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