grep { /him/ && /her/ } @arr
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One more question. Can i do it dynamically? Meaning grepping for lines that contain all the items in an array. Almost like grepping one array with another, finding lines in arr2 that contains every element in arr1. is that possible?

Something like this should work for you:

#!/usr/bin/perl

use warnings;
use strict;

my @to_match = qw/his her theirs/;

START:
for my $line (<DATA>) {
    for my $item (@to_match) {
        next START unless $line =~ /$item/;
    }
    print $line;
}

__DATA__
his her theirs asdf
his her something else
this shouldn't match either
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If you want to compare arrays there are more efficient ways. But to expand on grep{} in a list context, you can put anything you want inside the grep. If the *last line* in the grep is "true" then input is passed to the output.

Here is a simple example where what is in the grep{} has nothing to do with the input list...an odd/even flip-flopper. Perl grep can do some very cool things that command line grep can't!

#!/usr/bin/perl -w
use strict;

my @test = qw (a b c d e f);
my $is_even_flag =1;

my @odd_tests = grep {$is_even_flag ^= 1;
                     }@test;
print "@odd_tests";  

#prints b d f
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