From: Ernest Ellingson <erne@...>
Date: 2001-03-07T02:27:23+09:00
Subject: [ruby-talk:12164] Re: NaN, Infinity (Bug?)

At 23:06 3/6/2001 +0900, you wrote:
>Tammo Freese <tammo.freese@offis.de> writes:
>
> > After the Pickaxe Book, first print, p. 320
>...
> > However, as the results of the code in the pickaxe book are generated
> > by running the code (aren't they?), 1.6.0 seems to have the correct(?)
> > behaviour (returning NaN).
>
>I just ran this again on my box here (ruby 1.6.2 (2001-02-02) [i686-linux]):
>
>  a = -1.0               # => -1.0
>  a.nan?                 # => false
>  a = Math.log(a)        # => NaN
>  a.nan?                 # => true
>
>So, there seems to be a difference between a Linux box and a
>Windows/cygwin box. Anyone any ideas?
>
>
>Dave


It works OK on windows 2000


ruby 1.6.2 (2000-12-25) [i586-mswin32]
-1.0
false
NaN
true