Hi,

At Sun, 28 Mar 2010 09:06:57 +0900,
Marc-Andre Lafortune wrote in [ruby-core:29075]:
> Looking at Random#rand, I notice that passing nil has the
> same result as not passing any argument.

It comes from Kernel#rand.

> Either it should raise an ArgumentError like the
> documentation implies, or else the documentation should be
> modified.
> 
> I would argue to raise an error because:
> - it is easy to pass nothing, or pass 1.0 instead, and get
>   the same result if that is what is desired
> - it could hide an error in the code, where the result is
>   unexpectedly nil but the programmer didn't think about it
>   (like whiny nils in rails)

Agreed.  For the backward compatibility, I'll keep Kernel#rand
and added the documentation instead.

-- 
Nobu Nakada