Dear Monks,

I need to compute duration intervals from various dates. I read through the DateTime Tutorial on perlmonks and choose to use this module. Unfortunately, i'm getting strange results on a first test : misunderstanding or bug ?

here is the code :

use strict;
use warnings;
use DateTime;

my $t1 = DateTime->new(year => 2001,
                        month => 4,
                        day => 23,
                        hour => 22,
                        minute => 32);
my $t2 = DateTime->new(year => 2001,
                        month => 4,
                        day => 22,
                        hour => 15,
                        minute => 42);
print "T1 = ".$t1->hour.":".$t1->minute."\n
       T2 = ".$t2->hour.":".$t2->minute."\n
       T1-T2 = ".$t1->subtract_datetime($t2)->hours."\n
       T2-T1 = ".$t2->subtract_datetime($t1)->hours."\n";

[download]

Here is the result :

T1 = 22:32
T2 = 15:42
T1-T2 = 6
T2-T1 = 6


Any comment or help would be appreciated, or if you know a better module to do that (i'll need to compute duration intervals in term of days also, which implies knowing the month's lengh ...)


Thanks,

Marcel

In reply to DateTime usage for duration computation by Marsel

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.