From 44dafcea00447565d0b33f5237f8aa0deb2c5ae1 Mon Sep 17 00:00:00 2001
From: CY Fung <fungcheokyin@gmail.com>
Date: Mon, 7 Nov 2022 01:05:27 +0800
Subject: Week 189 Task 2 Perl Solution

---
 challenge-189/cheok-yin-fung/perl/ch-2.pl | 37 +++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 challenge-189/cheok-yin-fung/perl/ch-2.pl

diff --git a/challenge-189/cheok-yin-fung/perl/ch-2.pl b/challenge-189/cheok-yin-fung/perl/ch-2.pl
new file mode 100644
index 0000000000..4e3576c545
--- /dev/null
+++ b/challenge-189/cheok-yin-fung/perl/ch-2.pl
@@ -0,0 +1,37 @@
+# The Weekly Challenge 189
+# Task 2 Array Degree
+
+use v5.30.0;
+use warnings;
+use List::Util qw/uniq max/;
+
+sub arr_deg {
+    my @array = $_[0]->@*;
+    my %freq;
+    $freq{$_}++ foreach @array;
+    my @ks = grep {$freq{$_} == max values %freq} uniq @array;
+    my @r_array = @array;
+    for my $k (@ks) {
+        my $f;
+        my $acc = 0;
+        my @result = ();
+        for (0..$#array) {
+            if ($array[$_] == $k) {
+                $acc++;
+                $f = $_ if !defined($f);
+            }
+            push @result, $array[$_] if defined($f);
+            last if $acc == $freq{$k};
+        }
+        @r_array = @result if scalar @result < scalar @r_array;
+    }
+    return [@r_array];
+}
+
+use Test::More tests=>5;
+use Test::Deep;
+cmp_deeply(arr_deg([1,3,3,2]), [3,3]);
+cmp_deeply(arr_deg([1,2,1,3]), [1,2,1]);
+cmp_deeply(arr_deg([1,3,2,1,2]), [2,1,2]);
+cmp_deeply(arr_deg([1,1,2,3,2]), [1,1]);
+cmp_deeply(arr_deg([2,1,2,1,1]), [1,2,1,1]);
-- 
cgit