AoC 2023 day 7 part 1 (Perl)

#!/usr/bin/perl

use v5.16;
use warnings;

use List::AllUtils  qw(sum zip_by);

sub matches {
    my $hand = shift;

    # Change cards to hexdigits
    $hand =~ y#AKQJT#EDCBA#;

    # Collect groups with hash
    my %cards = map { $_ => 0 } (2 .. 9, 'A' .. 'E');
    $cards{$_}++  foreach(split( '', $hand ));

    # Sort by group size
    my @str = sort { $cards{$b} <=> $cards{$a} } keys %cards;

    return ($hand, join('', map {$cards{$_}} @str));
}

# Parse into array of [hand (hexified), match signature, bid]
my @hands = map { m#(\w+) (\d+)#; [&matches($1),$2] } <>;

@hands = sort { $a->[1] <=> $b->[1] or hex($a->[0]) <=> hex($b->[0]) } @hands;

# Winnings is rank (low to high) * bid
say "Part 1: ", sum zip_by {$_[0] * $_[1][2]} [1 .. @hands], \@hands;