From: Marc-Andre Lafortune <ruby-core-mailing-list@...>
Date: 2010-04-12T05:33:01+09:00
Subject: [ruby-core:29461] Re: [RubySpec #3128] Randomness specs

Hi,

On Sun, Apr 11, 2010 at 1:30 PM, Caleb Clausen <vikkous@gmail.com> wrote:
> I find this troubling, since it could imply that the random number
> generator obeys the mythical law of averages. You know better, I'm
> sure, but others may not. A written standard needs to be very clear
> about this, and use the appropriate statistical language.

If I knew better, I would probably refer to a known statistical test :-)

I just meant that rubinius' implementation is such that Kernel.rand(1
<< 64) will never return any value greater than 1 << 31, which I find
troubling.

> 5) could be interpreted 2 ways, depending on the meaning of the
> ambiguous term 'platform'.

Indeed, sorry about the poor wording. I meant in the stronger sense,
i.e. on all implementations and all platforms (your 5b)

On Sun, Apr 11, 2010 at 5:02 AM, Nobuyoshi Nakada <nobu@ruby-lang.org> wrote:
> I think the specs are only 0 and 5, and I'd categorize them as:
> <snip good categorization...>

As per Caleb, there is a A-3) which is the same as A-2) but "...on all
platforms and all implementations". (or maybe you were implying it
too?)

So, what should apply to the Ruby language?