🎉 Starts day 1

2023-12-11 14:43:47 +01:00
commit db1e4575c7
3 changed files with 32 additions and 0 deletions
--- a/day_1/part_1.php
+++ b/day_1/part_1.php
@@ -0,0 +1,12 @@
+<?php
+
+$lines = array_filter(explode("\n", file_get_contents('./input.txt')), fn($line) => !empty($line));
+
+echo array_sum(array_map(
+    static function($line) {
+        $numbers = array_values(array_filter(array_map(static fn($letter) => is_numeric($letter) ? $letter : null, str_split($line))));
+
+        return (int) sprintf('%s%s', $numbers[0], array_pop($numbers));
+    },
+    $lines
+));