Re: null and NaN

From	Joao Rodrigues <groups_jr-1@yahoo.com.br>
Newsgroups	comp.lang.javascript
Subject	Re: null and NaN
Date	2015-06-05 00:55 -0300
Organization	Aioe.org NNTP Server
Message-ID	<mkr6jk$sfb$1@speranza.aioe.org> (permalink)
References	<null-20150602191404@ram.dialup.fu-berlin.de>

Show all headers | View raw

On 02/06/2015 14:28, Stefan Ram wrote:
>    Sometimes, it has been questioned whether it was wise to
>    implement
>
> typeof null
> "object"
>

It happens due to a bug in the first version of JS [1].

>    . However, I just became aware that this is echoing a
>    similar case:
>
> typeof NaN
> "number"
>
>    . NaN says its »Not a Number«, yet typeof says it is a
>    number!

This case is something else. I'd rather prefer the joke: "NaN stands for 
Not a NaN" [2].

[1] <http://www.2ality.com/2013/10/typeof-null.html>
[2] 
<http://ariya.ofilabs.com/2014/05/the-curious-case-of-javascript-nan.html>

-- 
Joao Rodrigues

Back to comp.lang.javascript | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: null and NaN Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-06-05 00:55 -0300
  Re: null and NaN Robert Heller <heller@deepsoft.com> - 2015-06-05 06:57 -0500
    Re: null and NaN Steven D'Aprano <steve@pearwood.info> - 2015-06-07 18:47 +1000
  Re: null and NaN Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-06 08:39 +0200
    Re: null and NaN Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-06-06 23:15 -0300
      Re: null and NaN Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-07 09:59 +0200
        Re: null and NaN Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-06-07 22:30 -0300
          Re: null and NaN Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-06-10 20:48 +0200
            Re: null and NaN Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-06-11 10:01 -0300
              Re: null and NaN "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-11 15:28 +0200
                Re: null and NaN Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-06-11 11:34 -0300
                Re: null and NaN "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-11 21:07 +0200
                Re: null and NaN Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-06-11 17:29 -0300
                Re: null and NaN "Christoph M. Becker" <cmbecker69@arcor.de> - 2015-06-11 23:15 +0200

csiph-web