From caef8be004348b8426f7694d75a0f28eeae8b493 Mon Sep 17 00:00:00 2001
From: Jörg Sommrey <28217714+jo-37@users.noreply.github.com>
Date: Tue, 23 Jan 2024 20:49:38 +0100
Subject: Solution to task 1

---
 challenge-253/jo-37/perl/ch-1.pl | 62 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100755 challenge-253/jo-37/perl/ch-1.pl

diff --git a/challenge-253/jo-37/perl/ch-1.pl b/challenge-253/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..70212982a6
--- /dev/null
+++ b/challenge-253/jo-37/perl/ch-1.pl
@@ -0,0 +1,62 @@
+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0;
+
+our ($tests, $examples, $sep);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless defined $sep && @ARGV;
+usage: $0 [-examples] [-tests] [-sep=S STR...]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+-sep=C
+    use C as separator
+
+STR
+    list of strings
+
+EOS
+
+
+### Input and Output
+
+say join ',', map qq("$_"), split_strings($sep, @ARGV);
+
+
+### Implementation
+
+sub split_strings {
+    my $sep = shift;
+	grep length, map +(split /\Q$sep/), @_;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is [split_strings('.' => "one.two.three","four.five","six")],
+            ["one","two","three","four","five","six"], 'example 1';
+        is [split_strings('$' => '$perl$$', '$$raku')],
+            ["perl","raku"], 'example 2';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+
+        is [split_strings(0 => qw(00aa00b00 00c00dd00))],
+            [qw(aa b c dd)], 'empty fields with zero separator';
+	}
+
+    done_testing;
+    exit;
+}
-- 
cgit 


From e694632f0080c5c498492298bd4d732047178617 Mon Sep 17 00:00:00 2001
From: Jörg Sommrey <28217714+jo-37@users.noreply.github.com>
Date: Tue, 23 Jan 2024 20:49:52 +0100
Subject: Solution to task 2

---
 challenge-253/jo-37/perl/ch-2.pl | 75 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100755 challenge-253/jo-37/perl/ch-2.pl

diff --git a/challenge-253/jo-37/perl/ch-2.pl b/challenge-253/jo-37/perl/ch-2.pl
new file mode 100755
index 0000000000..dad11ed26a
--- /dev/null
+++ b/challenge-253/jo-37/perl/ch-2.pl
@@ -0,0 +1,75 @@
+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0 '!float';
+use PDL;
+use PDL::NiceSlice;
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV;
+usage: $0 [-examples] [-tests] [M]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+M
+    a matrix in any form accepted by the PDL string constructor,
+    e.g.
+    "[[1, 2, 0, 0, 4], [1, 1, 1, 1, 0], [3, 0, 0, 0, 0]]"
+EOS
+
+
+### Input and Output
+
+say weakest("@ARGV");
+
+
+### Implementation
+
+sub weakest {
+	my $m = pdl @_;
+    $m->append($m((0))->ndcoords)->qsortveci;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is weakest([
+                   [1, 1, 0, 0, 0],
+                   [1, 1, 1, 1, 0],
+                   [1, 0, 0, 0, 0],
+                   [1, 1, 0, 0, 0],
+                   [1, 1, 1, 1, 1]
+                 ])->unpdl, [2, 0, 3, 1, 4], 'example 1';
+
+        is weakest([
+                   [1, 0, 0, 0],
+                   [1, 1, 1, 1],
+                   [1, 0, 0, 0],
+                   [1, 0, 0, 0]
+                 ])->unpdl, [0, 2, 3, 1], 'example 2';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+
+        is weakest([0, 1, 2, 3],
+                   [1, 0, 0, 0],
+                   [1, 2, 3, 4],
+                   [0, 1, 2, 3],
+                   [1, 2, 3, 5])->unpdl, [0, 3, 1, 2, 4], 'arbitrary matrix';
+	}
+
+    done_testing;
+    exit;
+}
-- 
cgit 


From 9c954b5c695398156fb82b1a5cd3e7c8d3d446d1 Mon Sep 17 00:00:00 2001
From: Jörg Sommrey <28217714+jo-37@users.noreply.github.com>
Date: Tue, 23 Jan 2024 20:50:47 +0100
Subject: Blog for challenge 253

---
 challenge-253/jo-37/blog.txt | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 challenge-253/jo-37/blog.txt

diff --git a/challenge-253/jo-37/blog.txt b/challenge-253/jo-37/blog.txt
new file mode 100644
index 0000000000..906fab4611
--- /dev/null
+++ b/challenge-253/jo-37/blog.txt
@@ -0,0 +1 @@
+https://github.sommrey.de/blog/pwc/challenge-253
-- 
cgit