On Wed, May 30, 2001 at 06:14:24PM +0900, Yukihiro Matsumoto wrote:
> Hi,
> 
> In message "[ruby-talk:16025] Logical values in Ruby?"
>     on 01/05/30, Juha Pohjalainen <voidjump / nic.fi> writes:
> 
> |Has anyone done Logical values (that is true, false or unknown) in
> |Ruby? I see there is TrueClass (and only one instance of it; true)
> |and FalseClass (and only one instance of it; false), but I don't
> |see see UnknownClass (or only one instance of it; unknown).
> |
> |Any ideas? Or implementations already?
> 
> How about using `nil' for that purpose?
> 
> 							matz.

I thought of that too, but nil evaluates false. And then everyting
else (but nil and false) evaluates true. But that shall do for now.
Thank you!

-Jippo

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