On Nov 17, 2011, at 11:07 AM, Stuart Dallas wrote:
> On 17 Nov 2011, at 16:01, Tedd Sperling wrote:
> To all:
>> Okay, so now that we have had people reply, here's my take.
>> The Unix timestamp started on 01 Jan 1970 00:00:00 +0000 -- and that was a 
>> Thursday.
>> The second before (i.e., 31 December, 1969 23:59:59:59 + 0000) was null, 
>> which was Wednesday.
> I take issue with this. The second before was -1 seconds from the epoch. Null 
> is the absence of a value, so you can't get to null by simple arithmetic. I 
> learnt about negative numbers from the Greeks. And no, I'm not going to 
> comment on their current mathematical difficulties.
> Hmm.
> D'oh!
> But the point still stands: -1 !== null.
> -Stuart

Leave it to you to get all Greek on me. :-)

Consider this -- do you think the second before the "Big Bang" was negative or 

Likewise, the Unix timestamp was defined to start at a specific point in time 
-- it does not address/define what time came before. Thus, what came before was 
not negative, but rather 'undefined'. I claim 'null' is a better fit for 
'undefined' than negative -- plus it works.

For example, if you push '-1' though strtotime(-1), you'll get Wednesday only 
one day a week -- whereas 'null' works every time.

My point stands: null == Wednesday.   :-)




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