topic How to add time intervals in perl in Operating System - Linux

How to add time intervals in perl

Pankaj Yadav_1 — Fri, 04 Aug 2006 06:29:09 GMT

Hi,

My time intervals are in the form hours:mins:secs and are stored in variables.

I want to know how can we add the two variables?

Please answer me .

Re: How to add time intervals in perl

James R. Ferguson — Fri, 04 Aug 2006 06:40:43 GMT

Hi:

Perhaps this will show you:

#!/usr/bin/perl
use strict;
use warnings;
my $t = "1:02:03";
my ($hr, $min, $sec) = split /:/, $t;
my $elapsed = ($hr * 3600) + ($min * 60) + $sec;
print "elapsed time = $elapsed\n";

Regards!

...JRF...

Re: How to add time intervals in perl

Peter Godron — Fri, 04 Aug 2006 07:07:33 GMT

Expanding on James's solution
NO POINTS please

#!/usr/contrib/bin/perl
my $t = "1:02:03";
my $t2 = "10:58:59";
my ($hr, $min, $sec) = split /:/, $t;
my ($hr2, $min2, $sec2) = split /:/, $t2;
my $hr3 = $hr + $hr2;
my $min3 = $min + $min2;
my $sec3 = $sec + $sec2;
my $elapsed = ($hr3 * 3600) + ($min3 * 60) + $sec3;
my $hr4 = int $elapsed / 3600;
my $new = $elapsed % 3600 ;
my $min4 = int $new / 60;
my $sec4 = $new % 60 ;
printf "total time = %02d:%02d:%02d\n",$hr4,$min4,$sec4;

Re: How to add time intervals in perl

Pankaj Yadav_1 — Fri, 04 Aug 2006 07:08:26 GMT

Hi,

Actually I have two variables like

$a='12:23:44' and $b='1:32:22'

I want to perform
$c=$a+$b;

The result should also be in the form hours:mins:secs

Please answer me !

Re: How to add time intervals in perl

Peter Nikitka — Fri, 04 Aug 2006 07:21:53 GMT

Hi,

I'm pretty shure you didn't try Peter G. response - of course you have to set $t and $t2 accordingly instead of $a and $b.

mfG Peter

Re: How to add time intervals in perl

Pankaj Yadav_1 — Fri, 04 Aug 2006 07:24:02 GMT

Actually my time intervals are stored in an array.
Please tell me how to take each value from the array and add them and store the final result in a variable in the form hours:mins:sec

Re: How to add time intervals in perl

James R. Ferguson — Fri, 04 Aug 2006 07:28:38 GMT

Hi (again):

You wrote:

/* begin_quote */

Actually I have two variables like

$a='12:23:44' and $b='1:32:22'

I want to perform
$c=$a+$b;

The result should also be in the form hours:mins:secs

/* end_quote */

You really have the answer if you think about it. Convert both $a and $b into seconds as I suggested; add the resultants ($c); and now 'div' and 'mod' as Peter Gordon did in his post!

Regards!

...JRF...

Re: How to add time intervals in perl

James R. Ferguson — Fri, 04 Aug 2006 07:37:49 GMT

Hi (again):

OK, so your variables are contained in an array. Consider this example:

# perl -le '@a=qw (1:02:03 2:00:00);$t1=$a[0];$t2=$a[1];print "t1=$t1 t2=$t2"'

Remember that Perl (like any good language) treats things zero-relative. Thus, the first array element is numbered zero, and the second element is element-1.

Regards!

...JRF...

Re: How to add time intervals in perl

Pankaj Yadav_1 — Fri, 04 Aug 2006 07:45:41 GMT

I don't know the values neither I know the size of the array since the values present in it is from a SQL query.

I want to add all the values and store the result in another variable.

Re: How to add time intervals in perl

James R. Ferguson — Fri, 04 Aug 2006 07:51:06 GMT

Hi:

You wrote, "I don't know the values neither I know the size of the array since the values present in it is from a SQL query.
I want to add all the values and store the result in another variable."

The size of the array doesn't matter. I assume that you know the element numbers where the data occurs.

I have shown you in the abstract how to extract elements from an array or list; split them into pieces; and sum them.

Your question keeps changing. I suggest that you post *exactly* what you have tried to write so that we can attempt to direct you.

Regards!

...JRF...

Re: How to add time intervals in perl

Pankaj Yadav_1 — Fri, 04 Aug 2006 07:55:58 GMT

I think I have got the solution.

Thanks a lot for all the pain you all took !

If I get further problems I will post here .
This forum is great since the members are great.

Thanks a lot once again.

Re: How to add time intervals in perl

Marvin Strong — Fri, 04 Aug 2006 07:56:57 GMT

let me make sure I understand.

You don't know which elements of your array contain the values you want to add? But you want to add them and store them as a different variable?

If thats the case you need to figure out what elements they are (print the array) or return the data from your query into a more useful data structure.