You may find List::Compare helps, but I can't help thinking there is a bit of XY going on here. What is the bigger problem you are trying to solve?

A cleaner and easier to maintain version of your sample code is:

use strict;
use warnings;
use Data::Dumper;

my @arA = qw(lion tiger dog cat snake);
my @arB = qw(tiger dragon lion);
my @arC = qw(dog phoenix);
my @arD = qw(lion wolf mouse);

my %all;
my %arrays = (b => \@arB, c => \@arC, d => \@arD);
my %aElts;

@aElts{@arA} = (1) x @arA;

for my $array (keys %arrays) {
    for my $elt (@{$arrays{$array}}) {
        next unless $aElts{$elt};
        push @{$all{$elt}}, "from Array $array";
    }
}

print Dumper \%all;

[download]

Prints:

$VAR1 = {
          'lion' => [
                      'from Array b',
                      'from Array d'
                    ],
          'dog' => [
                     'from Array c'
                   ],
          'tiger' => [
                       'from Array b'
                     ]
        };

[download]
DWIM is Perl's answer to Gödel

In reply to Re: Selective Check of Multiple Arrays With Single Construct by GrandFather
in thread Selective Check of Multiple Arrays With Single Construct by neversaint

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