Are you sure that @test contains what you think it does?

You assign to @test in line three:

my @test = split();

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See split for what that does - it splits on whitespace. I can't reproduce your exact error case from the data you posted, but splitting on "," (comma) works for me:

use strict;

foreach(<DATA>) { 
    my @test = split(/,/);
    my $date = $test[2];
    my $first_seen = $test[3];
    if ($first_seen = /(23\:\d{1,2}\:\d{1,2})/) {
         $first_seen = $1;
         $first_seen =~ s/23/00/i;
         my $delim = "/";
         warn $date;
         my ($day,$month,$year) = split($delim, $date);
         warn $day;
         $day++;
         my $new_day = join "/", $day,$month,$year;
         warn $new_day;
         ##splice(@test, 3, "$new_day");
    };
};

__DATA__
program,xx.xx.xx.xx,28/05/08,23:48:31,28/05/08,17:53,data

[download]

Also note that you don't need to add double quotes around $day etc. - Perl knows that you intend to treat them as strings. You might be interested in DateTime or any of the other date handling modules though - especially when dealing with timestamps spanning a day change, I find real timestamps more convenient. Consider what happens on the change from 31st of May to 1st of June.

In reply to Re: Warnings - Argument isnt numneric by Corion
in thread Warnings - Argument isnt numneric by weezer_316

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