3 files changed, 72 insertions, 0 deletions
diff --git a/challenge-289/dave-jacoby/blog.txt b/challenge-289/dave-jacoby/blog.txt
new file mode 100644
index 0000000000..72e5b2400b
--- /dev/null
+++ b/challenge-289/dave-jacoby/blog.txt
@@ -0,0 +1 @@
+https://jacoby-lpwk.onrender.com/2024/10/01/irregular-use-of-regular-expressions-weekly-challenge-289.html
diff --git a/challenge-289/dave-jacoby/perl/ch-1.pl b/challenge-289/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..2220b86022
--- /dev/null
+++ b/challenge-289/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,31 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say state postderef signatures };
+
+use List::Util qw{ uniq };
+
+my @examples = (
+
+    [ 5, 6, 4, 1 ],
+    [ 4, 5 ],
+    [ 1, 2, 2, 3 ],
+
+);
+
+for my $example (@examples) {
+    my $output = third_maximum( $example->@* );
+    my $input  = join ', ', $example->@*;
+    say <<"END";
+    Input:  \$ints = ($input)
+    Output: $output
+END
+}
+
+sub third_maximum (@array) {
+    my @new = reverse uniq sort @array;
+    return $new[2] if defined $new[2];
+    return shift @new;
+}
+
diff --git a/challenge-289/dave-jacoby/perl/ch-2.pl b/challenge-289/dave-jacoby/perl/ch-2.pl
new file mode 100644
index 0000000000..a0cf0f97ed
--- /dev/null
+++ b/challenge-289/dave-jacoby/perl/ch-2.pl
@@ -0,0 +1,40 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say state postderef signatures };
+
+use List::Util qw{ min max };
+
+my @examples = (
+
+    'Perl is different. In a nutshell, Perl is designed to make
+the easy jobs easy, without making the hard jobs impossible.',
+
+    'According to Larry Wall(1), the original author of the Perl 
+programming language, there are three great virtues of a 
+programmer; Laziness, Impatience and Hubris.',
+
+    q{If you haven't used regular expressions before, a tutorial 
+introduction is available in perlretut. If you know just a 
+little about them, a quick-start introduction is available 
+in perlrequick.},
+
+    'THIS looks like a job for RECURSION!',
+);
+
+for my $input (@examples) {
+    my $output = $input;
+    $output =~ s{(\w)(\w+)(\w)}{ $1 . jumble_letters( $2 ) . $3 }gmxe;
+
+    say $input;
+    say '-----';
+    say $output;
+    say '';
+}
+
+sub jumble_letters ($str) {
+    $str = join '', sort { rand 10 <=> rand 10 }
+        split //, $str;
+    return $str;
+}