From: matz@... (Yukihiro Matsumoto)
Date: 2003-05-15T12:32:07+09:00
Subject: Re: obj.hash  now == obj.hash after?

Hi,

In message "obj.hash  now == obj.hash after?"
    on 03/05/15, gabriele renzi <surrender_it@rc1.vip.lng.yahoo.com> writes:

|I know that id (soon to be deprecated, I know ;) guarantees that two
|active objects wont get the same id in the same time, but I supposed
|that hash would give a unique value for any object in any time.

No, hash values are used for hashing values by Hash.  It does not need
full uniqueness.  Conflicts just slows down a Hash.

|If I marshal an object, restart ruby and reload it, will I get the
|same hash? what about the id ? why they look the same thing ?

No.  Marshal makes copies.  Hash values may not be same for copied
objects, even for cloned objects.

							matz.