An NSTimestamp represents a point in time, as has been stated.  Making it 
behave differently is a bad idea.

I have a set of methods that determine today's date in GMT, and store things 
that are dates that way.  I've never had a problem.  I pull out the year, 
month, and day from a timestamp represented in the local timezone, then create 
a new timestamp with the same year, month, and day with GMT as the timezone.  
It's always worked for me...

Ken



On Sep 29, 2010, at 10:44 PM, Chuck Hill wrote:

> Piling on here.  As Louis pointed out, "NSTimestamps are points in time".  
> Messing with that in prototypes is a Bad Idea.  You will regret.  Have you 
> crossed a DST boundary yet in your testing? And making one database behave 
> differently than others seems at least unwise.  
> 
> If you want a calendar date, find a different class.  Joda Time and Apache 
> Commons would be a good place to start looking.  That would make  welcome and 
> very useful contribution to Wonder.
> 
> 
> Chuck and hating Java and Dates
> 
> 
> 
> On Sep 29, 2010, at 6:58 PM, Ramsey Lee Gurley wrote:
>> On Sep 29, 2010, at 9:40 PM, Paul Hoadley wrote:
>> On 30/09/2010, at 10:21 AM, Louis Demers wrote:
>>> 
>>>> In my app, when that's the behaviour I want, I zero out the data before 
>>>> writing it to the database so  that subsequent checks for equality will 
>>>> return values...
>>> 
>>> FWIW, I've found that the only clean solution to this problem is to abandon 
>>> using timestamp types to represent a 1-day-resolution date.  In my 
>>> experience, at least, zeroing out the time part only works until you start 
>>> using multiple timezones.
>> 
>> Apple agrees with you Paul.
>> 
>> http://developer.apple.com/legacy/mac/library/documentation/InternetWeb/Reference/WO542Reference/index.html
>> 
>> Calendar dates should not be represented by NSTimestamp.  The Date prototype 
>> is wrong for using it IMHO.
>> 
>> Ramsey
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> -- 
> Chuck Hill             Senior Consultant / VP Development
> 
> Practical WebObjects - for developers who want to increase their overall 
> knowledge of WebObjects or who are trying to solve specific problems.    
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