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Re: How do I compare two NSDates using NSPredicate & Core Data

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Re: How do I compare two NSDates using NSPredicate & Core Data

Subject: Re: How do I compare two NSDates using NSPredicate & Core Data
From: Jens Alfke <email@hidden>
Date: Mon, 12 Apr 2010 10:09:21 -0700


On Apr 12, 2010, at 9:35 AM, Jeffrey Oleander wrote:

A date-time is a date-time, regardless of how it is
displayed or entered or obtained from the system.
The whole purpose of the NSDate object is to allow easy
comparison, and determination of intervals by subtraction...

Yup. An NSDate is really just a fancy wrapper around a floating-point number (a CFAbsoluteTime) representing the number of seconds since 1/1/2001.

(OK, an NSDate also remembers a time zone, but that's just for converting to human-readable form, it doesn't affect the actual time stored.)

—Jens_______________________________________________

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  >Re: How do I compare two NSDates using NSPredicate & Core Data (From: Jeffrey Oleander <email@hidden>)




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