From: Daniel Martin <martin@...>
Date: 2006-06-28T03:25:40+09:00
Subject: Re: Speaking of eql?

Daniel Martin <martind@martinhouse.internal> writes:

> The problem with that is that the default definition of eql? is:
>
> def eql?(other)
>   self == other
> end

Never mind.  I was misled by the html ruby manual on my system which
states:

        eql?(other)
               Checks if two objects are equal. This method is used by
               Hash to compare whether two keys are same. When this
               method is redefined, the hash method should be updated.
               The default definition of the method eql? is like blow:

def eql?(other)
  self == other
end

I now wonder what version that manual is from, because the text
doesn't match what I see on http://ruby-doc.org/core/

That said, now that it's clear eql? doesn't work like that, we should
say that redefining == without redefining eql? probably isn't
something you want to do.