Re: Broken date math on AppleScript 2.0
Re: Broken date math on AppleScript 2.0
- Subject: Re: Broken date math on AppleScript 2.0
- From: deivy petrescu <email@hidden>
- Date: Tue, 19 Feb 2008 17:27:16 -0500
On Feb 19, 2008, at 7:35, Mark J. Reed wrote:
On Feb 18, 2008 6:41 PM, deivy petrescu <email@hidden> wrote:
I do not know if it is date or integer problem.
Arguably a date problem. The trouble is that Applescript won't coerce
a date value into a floating point value to do math on it. The magic
number, as discussed earlier in this thread, is 2^29 - 1, or
536,870,911; you've just hit on a couple of creative ways of reaching
it. (Note that the time units are defined in terms of seconds, so
that "days" = 86400). If you do this:
current date + 536870911
then AppleScript does integer math and gets a sensible result. But if
you do this instead:
current date + 536870912
then the second number is too big to represent in an integer, so it
becomes a float, and things break down. I'm not sure exactly how -
maybe it's interpreting the floating-point bit pattern as an integer,
or something. I consistently get 2 days + 10 hours (208,800 seconds)
in the future out of the above expression.
--
Mark J. Reed <email@hidden>
Good catch Mark!
I do the computation in Days, AS does it in seconds...
Deivy
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