From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Fri, 1 Dec 2023 06:04:17 +0000 (+0100)
Subject: 2023 day 1 part 2: prettier solution
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=aoc.git;a=commitdiff_plain;h=7ef41e9dc4681907ba1f59c01982e598a6e4419d

2023 day 1 part 2: prettier solution
---

diff --git a/2023/02.pl b/2023/02.pl
index 56e0c26..b4701ca 100755
--- a/2023/02.pl
+++ b/2023/02.pl
@@ -3,26 +3,19 @@
 use v5.38;
 use strict;
 use experimental 'multidimensional', 'for_list', 'builtin';
+use builtin 'indexed';
 
 my $sum;
-
-my %map = (
-	one   => 1,
-	two   => 2,
-	three => 3,
-	four  => 4,
-	five  => 5,
-	six   => 6,
-	seven => 7,
-	eight => 8,
-	nine  => 9,
-);
+my @digits = qw(zero one two three four five six seven eight nine);
+my %map = reverse indexed @digits;
+my $re = join('|', '\d', @digits);
 
 while (<>) {
-	my ($first) = /(\d|one|two|three|four|five|six|seven|eight|nine)/;
-	my ($last)  = /(?:.*)(\d|one|two|three|four|five|six|seven|eight|nine)/;
-	$first = $map{$first} if exists $map{$first};
-	$last =  $map{$last}  if exists $map{$last};
+	my ($first) = /($re)/;
+	my ($last)  = /.*($re)/;
+	for ($first, $last) {
+		$_ = $map{$_} if !/\d/;
+	}
 	$sum += "$first$last";
 	# say "$_ $first $last.";
 }