From: GOTO Kentaro <gotoken@...>
Date: 2004-10-15T01:44:04+09:00
Subject: Re: "nan".to_f ?

Hi, 

In message "Re: "nan".to_f ?"
    on Thu, 14 Oct 2004 02:39:43 +0900, Yukihiro Matsumoto wrote:
> |  def aNaN
> |    s, e, m = rand(2), 2047, rand(2**52-1)+1
> |    [sprintf("%1b%011b%052b", s,e,m)].pack("B*").unpack("G").first
> |  end
> |
> |I believe this will generate NaN on environments where 
> |pack/unpack works and NaN exists. 
> 
> If the platform uses IEEE floating number, right?

Agreed!  And if there exists NaN on a non IEEE platform, 
that NaN must be another concept because NaN is defined in 
IEEE 754.  


Gotoken