perl - formatting DateTime output

Question

How do I convert my return using DateTime from:

This is my date:2011-11-26T20:11:06 to This is my date:20111126

Using this existin

Answer 1

There are about a dozen ways to process dates in Perl. However, if you know the format of the date string, there maybe no reason to call a datetime module:

$dt3 =~ /^(\d+)-(\d+)-(\d+)/;
print "This is my date:${1}${2}${3}\n";

I'm not familiar with DateTime, but I'd be surprised if there wasn't a way to format the data when you display it.

I personally prefer Time::Piece and Time::Seconds for these things. These modules have been part of the standard Perl installation since 5.10. Plus, I find the interface to be fairly simple and clean.

use Time::Piece;
use Time::Seconds;

my $time = localtime;
$time -= ONE_DAY;

print "This is my date:" . $time->ymd("");

For some reason, you can't say $time = localtime - ONE_DAY; on the same line. I guess you need to create the Time::Piece object first before you can manipulating them with the Time::Second constants.