Perl script to toggle through dates by week


 
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# 1  
Old 10-27-2009
MySQL Perl script to toggle through dates by week

Hi,
I need help to toggle through dates on a weekly basis to be fed into a script as inputs. The format should be: yyyy/mm/dd (start) yyyy/mm/dd (end), where end date is 7 days increments.

The date (start) would be input as an ARGV and would continue until current date.

I can check current date as follows:
Code:
my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = localtime time;
$year += 1900;
$mon += 1;

is there any perl function that would toggle through by a week.

And if the Start Date is say Not Sunday, then the start date should be adjusted to the next nearest Sunday.

thank you
Subha

---------- Post updated at 06:57 PM ---------- Previous update was at 12:23 PM ----------

#!/usr/bin/perl -w
use strict;
use warnings;
use Time::Local;

if ($#ARGV < 0)
{
die "Usage dates <input arg> : format is yyyy/mm/dd\n ";
exit (1);
}

my $start_date = $ARGV[0];
my $time = 0;
my $end_time = time;
print "Start Date: $start_date \n";
print "End Date: $end_time \n";

my @dates = split ('/', $start_date);
my $syyyy = $dates[0];
my $smm = $dates[1];
my $sdd = $dates[2];
$smm = $smm - 1;
$time = timelocal(0,0,0,$sdd,$smm,$syyyy);

print "Start time entered:", scalar(localtime($time)), "\n";

while ($time < $end_time)
{
$time += 7 * 24 * 60 * 60;
my ($isec, $imin, $ihour, $idd, $imm, $iyyyy, $iwday, $iyday, $iisdst) = localtime($time);
$iyyyy += 1900;
$imm += 1;
print "Time toggle: $iyyyy $imm $idd \n";
}

Last edited by pludi; 10-27-2009 at 03:36 PM.. Reason: code tags, please...
# 2  
Old 10-27-2009
If you have GNU date you could perhaps also do it like this:
Code:
for i in {0..6}; do 
  date -d "091028 $i days " '+%Y/%m/%d'
done|xargs

2009/10/28 2009/10/29 2009/10/30 2009/10/31 2009/11/01 2009/11/02 2009/11/03

# 3  
Old 10-27-2009
use Date::Calc , that is efficient.

Lemme know if you have any trouble using it or need an example.

HTH,
PL
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