3 files changed, 72 insertions, 0 deletions
diff --git a/challenge-228/dave-jacoby/blog.txt b/challenge-228/dave-jacoby/blog.txt
new file mode 100644
index 0000000000..2b1a2630d8
--- /dev/null
+++ b/challenge-228/dave-jacoby/blog.txt
@@ -0,0 +1 @@
+https://jacoby.github.io/2023/07/31/get-sum-weekly-challenge-228.html
diff --git a/challenge-228/dave-jacoby/perl/ch-1.pl b/challenge-228/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..4996d31312
--- /dev/null
+++ b/challenge-228/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,32 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say postderef signatures state };
+
+use List::Util qw( sum0 );
+
+my @examples = (
+
+    [ 2, 1, 3, 2 ],
+    [ 1, 1, 1, 1 ],
+    [ 2, 1, 3, 4 ],
+);
+
+for my $e (@examples) {
+    my @array = $e->@*;
+    my $array = join ', ', @array;
+    my $sum   = uniq_sum(@array);
+    say <<~"END";
+    Input:  \@int = ($array)
+    Output: $sum
+    END
+}
+
+sub uniq_sum (@array) {
+    my %hash;
+    for my $int (@array) {
+        $hash{$int}++;
+    }
+    return sum0 grep { $hash{$_} == 1 } keys %hash;
+}
diff --git a/challenge-228/dave-jacoby/perl/ch-2.pl b/challenge-228/dave-jacoby/perl/ch-2.pl
new file mode 100644
index 0000000000..512108a149
--- /dev/null
+++ b/challenge-228/dave-jacoby/perl/ch-2.pl
@@ -0,0 +1,39 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say postderef signatures state };
+
+use List::Util qw( min );
+
+my @examples = (
+
+    [ 3, 4, 2 ],
+    [ 1, 2, 3 ],
+
+);
+
+for my $e (@examples) {
+    my @array  = $e->@*;
+    my $array  = join ', ', @array;
+    my $output = empty_array(@array);
+    say <<~"END";
+    Input:  \@int = ($array)
+    Output: $output
+    END
+}
+
+# if the first element is the smallest
+#     then remove it
+# else
+#     move it to the end
+sub empty_array (@array) {
+    my $c = 0;
+    while ( scalar @array ) {
+        my $min  = min @array;
+        my $next = shift @array;
+        if ( $min != $next ) { push @array, $next; }
+        $c++;
+    }
+    return $c;
+}