From e89c9d620ec547c146e457a5db67036a8ba6889b Mon Sep 17 00:00:00 2001
From: Jörg Sommrey <28217714+jo-37@users.noreply.github.com>
Date: Thu, 24 Apr 2025 18:53:47 +0200
Subject: Solution to task 1

---
 challenge-318/jo-37/perl/ch-1.pl | 95 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100755 challenge-318/jo-37/perl/ch-1.pl

diff --git a/challenge-318/jo-37/perl/ch-1.pl b/challenge-318/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..4aab4d7f75
--- /dev/null
+++ b/challenge-318/jo-37/perl/ch-1.pl
@@ -0,0 +1,95 @@
+#!/usr/bin/perl
+
+use v5.26;
+use Test2::V0 -no_srand;
+use Test2::Tools::Subtest 'subtest_streamed';
+use Getopt::Long;
+use warnings FATAL => 'all';
+use Data::Dump qw(dd pp);
+use experimental 'signatures';
+
+use List::Util 'pairkeys';
+
+### Options and Arguments
+
+my ($tests, $examples, $verbose);
+GetOptions(
+    'examples!' => \$examples,
+    'tests!'    => \$tests,
+    'verbose!'  => \$verbose,
+) or usage();
+
+run_tests($examples, $tests);	# tests do not return
+
+usage() unless @ARGV == 1;
+
+sub usage {
+    die <<~EOS;
+    $0 - group position
+
+    usage: $0 [-examples] [-tests] [STR]
+
+    -examples
+        run the examples from the challenge
+     
+    -tests
+        run some tests
+
+    -verbose
+        enable trace output
+
+    STR
+        a string
+
+    EOS
+}
+
+
+### Input and Output
+
+say '"' . join('", "', group_position(shift)) . '"';
+
+
+### Implementation
+#
+# For details see:
+# https://github.sommrey.de/the-bears-den/2025/04/25/ch-318.html#task-1
+
+
+sub group_position {
+    shift =~ /((??{qr{(.)\1{2,}}}))/g;
+}
+
+
+### Examples and Tests
+
+sub run_tests ($examples, $tests) {
+    return unless $examples || $tests;
+
+    state sub run_example ($args, $expected, $name) {
+        my $result = [group_position(@$args)];
+        is $result, $expected,
+            "$name: (@$args) -> (@$expected)";
+    }
+
+    plan 2;
+
+    $examples ? subtest_streamed(examples => sub {
+        my @examples = (
+            [["abccccd"], ["cccc"], 'example 1'],
+            [["aaabcddddeefff"], ["aaa", "dddd", "fff"], 'example 2'],
+            [["abcdd"], [], 'example 3'],
+        );
+        plan scalar @examples;
+        for (@examples) {
+            run_example @$_;
+        }
+    }) : pass 'skip examples';
+
+    $tests ? subtest_streamed(tests => sub {
+        plan 1;
+        pass 'no tests';
+    }) : pass 'skip tests';
+
+    exit;
+}
-- 
cgit