From: "Kurt M. Dresner" <kdresner@...>
Date: 2003-08-12T11:20:53+09:00
Subject: Re: NaN and Inifinity

Oh yeah, I'm way out of date.

I think I'm using 1.6.something.

-Kurt

On Tue, Aug 12, 2003 at 11:16:41AM +0900, Dan Doel wrote:
> Scott Thompson wrote:
> 
> >>irb(main):015:0> a = Math::log(-1)
> >>=> NaN
> >>irb(main):016:0> a.class
> >>=> Float
> >>irb(main):017:0> b = "NaN".to_f
> >>=> NaN
> >>irb(main):018:0> b.class
> >>=> Float
> >>irb(main):019:0> b.nan?
> >>=> true
> >
> >
> >Hrrrm... Okee dokey.  I tried something like that and I get
> >
> >irb(main):002:0> b = "NaN".to_f
> >=> 0.0
> >irb(main):003:0> b.nan?
> >=> false
> >
> >There must be something wacky with my Ruby. :-)
> >
> >Scott
> 
> It's not just you. Happens to me, too, using Ruby 1.8.0pre9 (I believe) 
> mswin32 build.
> 
> Then again, Math::log(-1) throws a domain error for me.
> 
> If worse comes to worst you could always initialize with Math::log(-1), 
> since that returns
> what you want.
> 
> - Dan
> 
> 
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