1 files changed, 101 insertions, 0 deletions
diff --git a/challenge-322/jo-37/perl/ch-1.pl b/challenge-322/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..47d9e05c6e
--- /dev/null
+++ b/challenge-322/jo-37/perl/ch-1.pl
@@ -0,0 +1,101 @@
+#!/usr/bin/perl
+
+use v5.26;
+use Test2::V0 -no_srand;
+use Test2::Tools::Subtest 'subtest_streamed';
+use Getopt::Long;
+use experimental 'signatures';
+
+
+### Options and Arguments
+
+my ($tests, $examples, $verbose, $size);
+GetOptions(
+    'examples!' => \$examples,
+    'tests!'    => \$tests,
+    'verbose!'  => \$verbose,
+    'size=i'  => \$size,
+) or usage();
+
+run_tests($examples, $tests);	# tests do not return
+
+usage() unless @ARGV && $size;
+
+sub usage {
+    die <<~EOS;
+    $0 - string format
+
+    usage: $0 [-examples] [-tests] [-size I STR]
+
+    -examples
+        run the examples from the challenge
+     
+    -tests
+        run some tests
+
+    -size I
+        group size
+
+    STR
+        a string
+
+    EOS
+}
+
+
+### Input and Output
+
+say string_format(shift, $size);
+
+
+### Implementation
+#
+# For details see:
+# https://github.sommrey.de/the-bears-den/2025/05/23/ch-322.html#task-1
+
+
+sub string_format ($str, $i) {
+    join '-', $str =~ tr/-//dr =~ /^.{1,$i}(?=(?:.{$i})*+$)|.{$i}/g;
+}
+
+
+### Examples and Tests
+
+sub run_tests ($examples, $tests) {
+    return unless $examples || $tests;
+
+    state sub run_example ($args, $expected, $name) {
+        my $result = string_format(@$args);
+        is $result, $expected,
+            "$name: (@$args) -> $expected";
+    }
+
+    plan 2;
+
+    $examples ? subtest_streamed(examples => sub {
+        my @examples = (
+            [["ABC-D-E-F", 3], "ABC-DEF", 'example 1'],
+            [["A-BC-D-E", 2], "A-BC-DE", 'example 2'],
+            [["-A-B-CD-E", 4], "A-BCDE", 'example 3'],
+        );
+        plan scalar @examples;
+        for (@examples) {
+            run_example @$_;
+        }
+    }) : pass 'skip examples';
+
+    $tests ? subtest_streamed(tests => sub {
+        my @tests = (
+            [1, 'a-b-c-d-e-f'],
+            [2, 'ab-cd-ef'],
+            [3, 'abc-def'],
+            [4, 'ab-cdef'],
+            [5, 'a-bcdef'],
+            [6, 'abcdef'],
+        );
+        plan scalar @tests;
+        is string_format('abcdef', $_->[0]), $_->[1], "size=$_->[0]" for @tests;
+    }) : pass 'skip tests';
+
+    exit;
+}