Adriano Ferreira wrote:

>>What does 1.9 do for Hash#eql?  ?
> 
> Probably some equivalent to:
> 
> class Hash
>   def eql?(b)
>      h1 = (self.length >= b.length) ? self : b
>      h2 = (self.length >= b.length) ? b : self
>      return h1.all? { | k, v | v.eql?(h2[k]) }
>   end
> end
> 
> where setting h1, h2 is a trick for granting there will be no false positives.

Hm, I'm okay with the last part (checking if all pairs are shared), but 
I'd replace the h1, h2 stuff with self.size == other.size.