#! perl
use strict;
use warnings;
use Data::Dump;
use Parallel::Loops;

my  @names  = qw(Fred Wilma Pebbles Barney Betty Bamm-Bamm Leela);
my  %lookup = map { $_ => 1 } @names;
my  @data   =
    (
        'Fred loves Wilma and Pebbles.',
        'Barney is the husband of Betty and the father of Bamm-Bamm.',
        'Pebbles and Bamm-Bamm are playmates.',
        'Homer is married to Marge; their children are Bart, Lisa, and Maggie.',
    );

#----------------------------------------------------------------------------------------

my %results1;

for my $datum (@data)
{
    for my $search_term (keys %lookup)
    {
        push @{$results1{$search_term}}, $datum
            if  grep  { /$search_term/ } $datum;
    }
}

dd \%results1;

print "----------\n";

#----------------------------------------------------------------------------------------

my $pl = Parallel::Loops->new(4);
my %results2;

$pl->share(\%results2);

$pl->foreach
(
    \@data,
    sub
    {
        my $datum = $_;

        for my $search_term (keys %lookup)
        {
            push @{$results2{$datum}}, $search_term
                if  grep  { /$search_term/ } $datum;
        }
    }
);

# Invert the hash

my %results2a;

while (my ($key, $value) = each %results2)
{
    for (@$value)
    {
        push @{ $results2a{$_} }, $key;
    }
}

dd \%results2a;