Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
Very nice example of these DateTime modules. I installed them and hope they are useful. But, it doesn't exactly figure the intersecting time of 2 sets of start, end times.

But here is a way to do it that produces output like he wanted. There are other modules besides DateTime that would provide solutions, Time::Piece (Time::Piece was first released with perl v5.9.5), Date::Parse, Time::Local, and probably others.

Either set of beg/end times could be switched, ($d1_beg and $d1_end could have been named $d2_beg, $d2_end and vice versa and this method would still be correct.

Chris

#!/usr/bin/perl use strict; use warnings; use DateTime::Format::Strptime; use List::Util qw/ maxstr minstr /; # first released with perl v5.7.3 my $d1_beg = '2012-08-17 12:00:00'; my $d1_end = '2012-08-17 13:00:00'; my $d2_beg = '2012-08-17 09:00:00'; my $d2_end = '2012-08-17 12:30:00'; if ($d2_beg ge $d1_end or $d2_end le $d1_beg) { print "No common time\n"; } else { my $start = maxstr($d1_beg, $d2_beg); my $end = minstr($d1_end, $d2_end); my $dt = DateTime::Format::Strptime->new(pattern => "%F %T"); my @dt = map $dt->parse_datetime($_), $start, $end; my $dur = $dt[1]->delta_ms($dt[0])->in_units('minutes'); # duratio +n print "$start for $dur minutes\n"; } __END__ *** prints 2012-08-17 12:00:00 for 30 minutes

Update: There is a nice discussion here about handling durations with DateTime.


In reply to Re^2: timestamp manipulation and evaluation by Cristoforo
in thread timestamp manipulation and evaluation by jonathancnewcomb

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!
  • 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, 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, 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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others meditating upon the Monastery: (5)
    As of 2015-07-07 01:24 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (86 votes), past polls