From: Aaron Patterson <aaron@...>
Date: 2007-11-24T16:25:54+09:00
Subject: Re: Hashes, Sets, and eql?

On Sat, Nov 24, 2007 at 03:55:00PM +0900, MonkeeSage wrote:
> Hi Aaron,
> 
> Set#eql? is probably just Object#eql?, which, as I understand it would
> compare the actual objects (not their contents). What you want is a
> "shallow" comparison (==).

Nope.  I don't want a shallow comparison.  I need to use my sets as hash
keys, so I need .eql? and .hash.  Set calls eql? on the internal hash object.

From the set source:

  def hash  # :nodoc:
    @hash.hash
  end

  def eql?(o) # :nodoc:
    return false unless o.is_a?(Set)
    @hash.eql?(o.instance_eval{@hash})
  end

-- 
Aaron Patterson
http://tenderlovemaking.com/