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Perl : calculation of time in format hh:mm:ss,sss


Perl : calculation of time in format hh:mm:ss,sss

By : emmasteimann
Date : November 22 2020, 01:01 AM
Any of those help A DateTime solution, since it has native support for fractional seconds. Once you got the two DateTime objects, you can use the following program:
code :
# delta_ms loses nanoseconds, but we need it to convert days into hours.
my ($h, $m, $s) = $dt2->delta_ms($dt1)->in_units(qw( hours minutes seconds ));
my $ns = ( $dt2 - $dt1 )->nanoseconds;

say sprintf '%d:%02d:%02d,%03.0f', $h, $m, $s, $ns/1_000_000;
use DateTime::Format::Strptime qw( );

my $format = DateTime::Format::Strptime->new(
   pattern   => '%H:%M:%S,%3N',
   time_zone => 'floating',
   on_error  => 'croak',
);

my $dt1 = $format->parse_datetime('01:59:58,123');
my $dt2 = $format->parse_datetime('03:01:02,456');
use DateTime::Format::Strptime qw( );

my $format = DateTime::Format::Strptime->new(
   pattern   => '%Y-%m-%d %H:%M:%S,%3N',
   time_zone => 'America/New_York',  # Often: 'local'
   on_error  => 'croak',
);

my $dt1 = $format->parse_datetime('2015-03-09 01:59:58,000');
my $dt2 = $format->parse_datetime('2015-03-09 03:01:02,000');


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Calculation of Total seconds from a particular format of time

Calculation of Total seconds from a particular format of time


By : AirWatch
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further If you're given a string of the format "33 hr 40 mins 40 secs", you'll have to parse the string first.
code :
var s = "33 hr 40 mins 40 secs";
var matches = Regex.Matches(s, "\d+");
var hr = Convert.ToInt32(matches[0]);
var min = Convert.ToInt32(matches[1]);
var sec = Convert.ToInt32(matches[2]);
var totalSec = hr * 3600 + min * 60 + sec;
time calculation issue with format php

time calculation issue with format php


By : Kevin
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You're subtracting a timestamp with a DateTime object, so it tries to convert the DateTime object to an int, which it can't. You need to get the timestamp for the DateTime object, to subtract two ints:
code :
<?php
$time = "2017-09-01 11:00:00"; //must start as a string like this
$newtime = new DateTime($time);
$newtime->setTime(00, 00,00); //change time to 00:00:00
$worktime = round((strtotime($time) - $newtime->getTimestamp())/3600, 2); // notice the $newtime->getTimestamp() call
echo "Hours Worked: " . $worktime . "<br>";
perl date calculation with dates of the format 2012-02-03 00:00:00

perl date calculation with dates of the format 2012-02-03 00:00:00


By : ITEvangelist
Date : March 29 2020, 07:55 AM
I hope this helps you . See DateTime.
Time calculation in perl

Time calculation in perl


By : Simen Steig
Date : March 29 2020, 07:55 AM
wish of those help Date and time calculations can be very complicated in any language. There are a lot of details to consider, and a lot of weird special cases (such as daylight saving time, or leap seconds). Best to find a well-tested off-the-shelf package to do the dirty work.
Two of the best for Perl are DateTime and Time::Piece. Another useful one to know is Date::Manip; it is less suited for general programming use, but is handy for parsing all kinds of sloppy user input, from "1/29/2015" to "last saturday".
Perl Script time difference calculation is off by one hour

Perl Script time difference calculation is off by one hour


By : Markov Sergey
Date : March 29 2020, 07:55 AM
this one helps. I don't know why you claim the output should be 24 hours. As you hinted, you inhabit somewhere that switched to Daylight Saving Time during that span, so there were only 23 hours between the two date-times in question. The output is correct.
I think you're trying to find the difference between two date-times in terms of days, hours, etc., but you haven't realized that the fact that not all days have 24 hours (and that not all minutes have 60 seconds) prevents you from doing that from a number of seconds.
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