From: Sebastian Hungerecker <sepp2k@...>
Date: 2009-05-04T23:39:55+09:00
Subject: Re: String#hash changed in Ruby 1.9?

Am Montag 04 Mai 2009 16:22:01 schrieb David Palm:
> in ruby 1.9.1:
> david@trince ~$ ruby -e 'puts "abc".hash'
> 402929305
> david@trince ~$ ruby -e 'puts "abc".hash'
> -403532784
> david@trince ~$ ruby -e 'puts "abc".hash'
> -650364342
>
> What happened? Is this intentional?

1.9 uses murmurhash(http://murmurhash.googlepages.com/) with a random seed 
which is generated once per application-run.

> Any tips on how to replace it?

What does it hurt if the hash value of a string does not remain constant 
between runs of the application?

HTH,
Sebastian