Re: So what's null then if it's not nothing?
From: mAsterdam <mAsterdam_at_vrijdag.org>
Date: Sat, 26 Nov 2005 11:05:17 +0100
Message-ID: <4388334c$0$24373$e4fe514c_at_news.xs4all.nl>
>
>
> As I comented a couple of weeks ago,
>
> A || EMPTY == EMPTY || A == A for every string A
>
> That makes EMPTY a pretty interesting string, from my point of view. I
> wouldn't want to confuse it with NULL any more than I'd want to confuse the
> integer zero with NULL.
>
> My comment drew no response. I'm not about to draw any inferences from
> that absence of a response.
Date: Sat, 26 Nov 2005 11:05:17 +0100
Message-ID: <4388334c$0$24373$e4fe514c_at_news.xs4all.nl>
David Cressey wrote:
> Jon Heggland wrote:
>
>>My question is this: >> >>You say the empty string is the same as "no value at all", and say we >>should call this concept of "no value at all" NULL for other data types. >>Now, the empty string is a perfectly normal string. You can do string >>operations on it: concatenate it, find its substring, find its length >>and so on. For an integer variable that is NULL, it is very different. >>You cannot do integer operations on it; you cannot add it to another >>integer, or multiply it, for example.
>
>
> As I comented a couple of weeks ago,
>
> A || EMPTY == EMPTY || A == A for every string A
>
> That makes EMPTY a pretty interesting string, from my point of view. I
> wouldn't want to confuse it with NULL any more than I'd want to confuse the
> integer zero with NULL.
>
> My comment drew no response. I'm not about to draw any inferences from
> that absence of a response.
Warnocked, eh? http://mar.anomy.net/entry/2003/07/20/21.18.32/ Let me unwarnock you: nothing to add (iow brilliant).
:-) Received on Sat Nov 26 2005 - 11:05:17 CET