[NBLUG/talk] perl script to rename file with a julian date

[troy]

Hi, Coop-

On Tue, Feb 03, 2004 at 03:46:10PM -0800, Dave Cooper wrote:
> Well I've been playing around, with no success...
> 
> I have 2 files in a /dir
> 
> fileA.rpt and fileB.rpt
> 
> everynight @ 2000 I need to rename the files with the julian date as the 
> extension....

There's a bunch of stuff in the Date::Calc module.
for instance, the date_to_days sub:

	This function returns the (absolute) number of the day of the given
	date, where counting starts at the 1st of January of the year 1 A.D.

	I.e., ""Date_to_Days(1,1,1)"" returns "1", ""Date_to_Days(1,12,31)""
	returns "365", ""Date_to_Days(2,1,1)"" returns "366",
	""Date_to_Days(1998,5,1)"" returns "729510", and so on.

	This is sometimes also referred to (not quite correctly) as the Julian
	date (or day). This may cause confu- sion, because also the number of the day
	in a year (from 1 to 365 or 366) is frequently called the "Julian date".

So something like:
use Date::Calc qw(Date_To_Days);
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime();

$now = Date_To_Days($year+1900, $mon+1, $mday);

Date::Calc is a pretty big hammer; you might also check the CPAN for something
more specific.

-troy