Do you want to assume that all days have 24 hours and all minutes have 60 seconds, or do you want to use here and now as a starting point?

If you want to use here and now as a starting point:

Downside: The result won't be accurate if it's really relative to another reference point. 

use DateTime qw( );

{
   my $now = DateTime->now( time_zone => 'local' );

   ( my $dt = $now->clone )
      ->add( seconds => $ARGV[0] );

   print format_duration($dt - $now), "\n";
}

[download]

Note that you can extend this to months and years if you wanted.

If you don't want to use a starting point:

Downside: Incorrectly assumes every day has 24 hours and every minute has 60 seconds. 

use DateTime::Duration qw( );

{
   my $secs = $ARGV[0];

   my $dur = DateTime::Duration->new(
      days    => int($secs/(24*60*60)),
      hours   => int($secs/(60*60))%24,
      minutes => int($secs/60)%60,
      seconds => $secs%60,
   );

   print format_duration($dur), "\n";
}

[download]

Note that you can extend this to weeks if you wanted.

Common code: 

sub human_list {
   my $last = pop;
   return @_ ? join(', ', @_) . " and $last" : $last;
}


my @units = (
   [qw( day    days    )],
   [qw( hour   hours   )],
   [qw( minute minutes )],
   [qw( second seconds )],
);

my @units_plural = map $_->[1], @units;

sub format_duration {
   my ($dur) = @_;

   my %parts;
   @parts{@units_plural} = $dur->in_units(@units_plural);

   my @parts;
   for (@units) {
      my ($singular, $plural) = @$_;
      if ($parts{$plural} == 1) {
         push @parts, "1 $singular";
      } elsif ($parts{$plural} >= 1) {
         push @parts, "$parts{$plural} $plural";
      }
   }

   return @parts ? 'in ' . human_list(@parts) : 'now';
}

[download]

In reply to Re: smart human readable time epoch by ikegami
in thread smart human readable time epoch by rakzer

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.