First of all, I would like to say this is my first post in the unix.com forums. I am a beginner in PERL and have only started writing my first scripts.
With that out of the way, I have a question regarding the calculation of time dates in PERL.
I have two scalar variables with the following dates, notice the format of YYYY:MM:dd:hh:mm
Okay. You want to learn; I'll show you.
time/date in unix and in perl (which was written on UNIX originally) use a so-called broken down time/date. Everything in dates is based on the number of seconds (epoch time) since Jan 1 1970. VERY important. So most of what you do is turn dates into epoch seconds, subtract or add, then convert the seconds back into something humans like to see.
this returns time in seconds, epoch time:
The array is sort of self documenting == Broken down time is the array.
Read this to learn how to use timelocal and timegm: Time::Local - perldoc.perl.org
pseudocode:
% is modulo operator - the remainder from division. You get to work out "hours".
hint: start with diff % 86400.
For your hours total just divide diff/3600 to get total=121, but you'll need to do this other stuff as well. Remember you want whole number answers, so perl's int is your friend.
hello folks,
I have a requirement in which I have to calculate the difference of
localdate(today's date) and the given(earlier) date and to check whether the
difference is exactly a year or more than that(can be 1 year or 2 years or 3 years.. ) .
Could anyone please let me know the logic... (2 Replies)
Hello All,
I have two strings with date and time as follows..
$starttime= "06/11/2013 ";
$starttime= "05:15";
$enddate="06/12/2013";
$endtime="04:45";
dates are in mm/dd/yyyy format and time in military format.
and I am looking the duration of time(in minutes) in between dates.
... (3 Replies)
Hi All
I have a text file that has a list of dates in it ( see below example) is there i can just pull out the lines that are from this week ( week starting on monday) and then work out the how many occurances there are on each name in collum 2
2013-05-13 08:20:02 bacha ... (8 Replies)
Hi
i have a file containg dates likebelow
4/30/2013
3/31/2013
4/30/2013
4/16/2013
4/30/2013
4/30/2013
5/30/2013
5/30/2013
4/30/2013
5/30/2013
5/30/2013
3/31/2013
now i want to compare the above dates with current date and i want to display the difference . (10 Replies)
Hi,
how to calculate the time difference between PST date and PDT date in perl scripting.
date1: Mon Dec 31 16:00:01 PST 2015
date2: Tue Mar 19 06:09:30 PDT 2013
and also difference between PST-PST and PDT-PDT
need difference in months or days (months prefereble). (3 Replies)
I have a directory of backup files.
named like this:
ldap.data.04-06-2012.tar
ldap.data.03-06-2012.tar
ldap.data.02-06-2012.tar
ldap.data.01-06-2012.tar
ldap.data.31-05-2012.tar
ldap.data.30-05-2012.tar
ldap.data.29-05-2012.tar
ldap.data.28-05-2012.tar
ldap.data.27-05-2012.tar... (6 Replies)
Hi,
I need help to toggle through dates on a weekly basis to be fed into a script as inputs. The format should be: yyyy/mm/dd (start) yyyy/mm/dd (end), where end date is 7 days increments.
The date (start) would be input as an ARGV and would continue until current date.
I can check... (2 Replies)
Hi,
Is there any way I can get the difference between two dates in terms of days?
I have used this method so far, but I cant format it in terms of days.
@a=&DateCalc($date1,$date2,0);
The o/p that I am getting is sort of like this:
+0:0:0:4:0:0:0
I just want to get 4 days as an o/p.... (1 Reply)
Hello friends,
I am looking for a script or method that can display all the dates between any 2 given dates.
Input:
Date 1
290109
Date 2
010209
Output:
300109
310109
Please help me. Thanks. :):confused: (2 Replies)
I need to create 12 variables, the first of which is the date of the first day of the current month (01/01/2006), and the remaining 11 are to equal each month after the current.
var1 = 01/01/2006
var2 = 02/01/2006
var3 = 03/01/2006
var4 = 04/01/2006
etc.
How can I easily do this is in... (7 Replies)