3 files changed, 74 insertions, 0 deletions
diff --git a/challenge-207/dave-jacoby/blog.txt b/challenge-207/dave-jacoby/blog.txt
new file mode 100644
index 0000000000..5ad094dd9f
--- /dev/null
+++ b/challenge-207/dave-jacoby/blog.txt
@@ -0,0 +1 @@
+https://jacoby.github.io/2023/03/06/multistatus-weekly-challenge-207.html
diff --git a/challenge-207/dave-jacoby/perl/ch-1.pl b/challenge-207/dave-jacoby/perl/ch-1.pl
new file mode 100644
index 0000000000..acfd7f006c
--- /dev/null
+++ b/challenge-207/dave-jacoby/perl/ch-1.pl
@@ -0,0 +1,42 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ fc say postderef signatures state };
+
+use DateTime;
+
+my @examples = (
+
+    [qw{ Hello Alaska Dad Peace }],
+    [qw{ OMG Bye }],
+);
+
+for my $e (@examples) {
+    my $list  = join ',', map { qq{"$_"} } $e->@*;
+    my $out   = keyboard_word( $e->@* );
+    my $olist = join ',', map { qq{"$_"} } $out->@*;
+    say <<"END";
+    Input:  \@array = ($list)
+    Output: ($olist)
+END
+}
+
+sub keyboard_word ( @array ) {
+    my @output;
+    my %row_1 = map { $_ => 1 } split //, 'qwertyuiop';
+    my %row_2 = map { $_ => 1 } split //, 'asdfghjkl';
+    my %row_3 = map { $_ => 1 } split //, 'zxcvbnm';
+
+    for my $Word (@array) {
+        my $count;
+        for my $l ( map { fc $_ } split //, $Word ) {
+            $count->{1}++ if $row_1{$l};
+            $count->{2}++ if $row_2{$l};
+            $count->{3}++ if $row_3{$l};
+        }
+        push @output, $Word unless scalar keys $count->%* > 1;
+    }
+    return wantarray ? @output : \@output;
+}
+
diff --git a/challenge-207/dave-jacoby/perl/ch-2.pl b/challenge-207/dave-jacoby/perl/ch-2.pl
new file mode 100644
index 0000000000..3d7af432e1
--- /dev/null
+++ b/challenge-207/dave-jacoby/perl/ch-2.pl
@@ -0,0 +1,31 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use experimental qw{ say postderef signatures state };
+
+use List::Util qw{ max };
+
+my @examples = (
+
+    [ 10, 8, 5, 4, 3 ],
+    [ 25, 8, 5, 3, 3 ],
+);
+
+for my $e (@examples) {
+    my $o     = h_index( $e->@* );
+    my $array = join ', ', $e->@*;
+    say <<"END";
+    Input:  \@array = $array
+    Output: $o
+END
+}
+
+sub h_index ( @citations ) {
+    my $max = max @citations;
+    for my $h ( 1 .. $max ) {
+        my $i = () = grep { $_ >= $h } @citations;
+        return $h - 1 if $i < $h;
+    }
+    return 0;
+}