that is to use the original array and splice/delete out the lines containing the usernames I want. But I couldn't figure out how to delete a row and then shift the rest up

I think splice and unshift are the tools for this job but the trick is to work your way forward from the end of the array so that you don't get indices tangled.

use strict;
use warnings;

use Data::Dumper;

my @records = (
   [ qw{ 922337219576856 rgiles 5005444 156 pts/220 9:00:44 } ],
   [ qw{ 922337219576856 mrandall 3309650 35 none 9:10:44 } ],
   [ qw{ 922337219576856 mmartin 4565899 122 pts/101 9:15:44 } ],
   [ qw{ 59761456123786 rkelly 5555555 999 pts/900 9:00:00 } ],
   [ qw{ 59761456123786 mvick 1234567 886 none 9:20:00 } ],
   [ qw{ 59761456123786 jrussel 7654321 456 tty/101 10:00:00 } ],
   [ qw{ 86555522211 cklien 5151515 000 tty/100 10:00:00 } ],
   [ qw{ 86555522211 mmartin 1234567 987 none 11:00:00 } ],
   );

my @excludeThese = qw{ rgiles mrandall rkelly mvick jrussel cklien };
my $rxExclude = do {
   local $" = q{|};
   qr{(?:@excludeThese)};
   };

my @excluded;
foreach my $idx ( reverse 0 .. $#records )
{
    unshift @excluded, splice @records, $idx, 1
       if $records[ $idx ]->[ 1 ] =~ $rxExclude;
}

print Data::Dumper->Dumpxs(
   [ \ @records, \ @excluded ],
   [ qw{ *records *excluded } ]
   );
[download]

The output.

@records = (
             [
               '922337219576856',
               'mmartin',
               '4565899',
               '122',
               'pts/101',
               '9:15:44'
             ],
             [
               '86555522211',
               'mmartin',
               '1234567',
               '987',
               'none',
               '11:00:00'
             ]
           );
@excluded = (
              [
                '922337219576856',
                'rgiles',
                '5005444',
                '156',
                'pts/220',
                '9:00:44'
              ],
              [
                '922337219576856',
                'mrandall',
                '3309650',
                '35',
                'none',
                '9:10:44'
              ],
              [
                '59761456123786',
                'rkelly',
                '5555555',
                '999',
                'pts/900',
                '9:00:00'
              ],
              [
                '59761456123786',
                'mvick',
                '1234567',
                '886',
                'none',
                '9:20:00'
              ],
              [
                '59761456123786',
                'jrussel',
                '7654321',
                '456',
                'tty/101',
                '10:00:00'
              ],
              [
                '86555522211',
                'cklien',
                '5151515',
                '000',
                'tty/100',
                '10:00:00'
              ]
            );
[download]

I hope this is helpful.

Cheers,

JohnGG

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