On Fri, Sep 23, 2011 at 1:08 PM, Denis Kudriashov <dionisiydk@gmail.com> wrote:

Hello,

I use hash message to generate unique object id. (unique between current memory objects).
And I catch situation when two objects has same hash value. Objects has been created in loop almost at same time.

So my question - is it really possible?
Can it be bug in my current VM which I used? (it is cog but very old)

What you can recomment me for unique object id?

What marcus said is correct.
THe only easy way is to have an instVar in your objects. You can put instances of UUID.

�� UUID new -> 545bd8d5-18d5-41c0-b11a-63d82dcef783
�
Otherwise, if you are lucky and you have domain objects (like Person >> id) that can use they own implementation of #hash, do it !!

Best regards,
Denis