From 12ee0b590fc517529422b2f9403cdd318cc3e5f2 Mon Sep 17 00:00:00 2001
From: CY Fung <fungcheokyin@gmail.com>
Date: Mon, 11 Sep 2023 00:06:02 +0800
Subject: Week 233

---
 challenge-233/cheok-yin-fung/perl/ch-1.pl | 24 ++++++++++++++++++++++++
 challenge-233/cheok-yin-fung/perl/ch-2.pl | 22 ++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 challenge-233/cheok-yin-fung/perl/ch-1.pl
 create mode 100644 challenge-233/cheok-yin-fung/perl/ch-2.pl

diff --git a/challenge-233/cheok-yin-fung/perl/ch-1.pl b/challenge-233/cheok-yin-fung/perl/ch-1.pl
new file mode 100644
index 0000000000..2810b71457
--- /dev/null
+++ b/challenge-233/cheok-yin-fung/perl/ch-1.pl
@@ -0,0 +1,24 @@
+# The Weekly Challenge 223
+# Task 1 Similar Words
+use v5.30.0;
+use warnings;
+use List::Util qw/uniqstr/;
+
+sub sw {
+    my @words = @_;
+    my @cwords = map {join "", uniqstr sort {$a cmp $b} split "", $_} @words;
+    my $ans = 0;
+    for my $i (0..$#cwords) {
+        for my $j ($i+1..$#cwords) {
+            $ans++ if $cwords[$i] eq $cwords[$j];
+        }
+    }
+    return $ans;
+}
+
+
+use Test::More tests=>3;
+ok sw("aba", "aabb", "abcd", "bac", "aabc") == 2;
+ok sw("aabb", "ab", "ba") == 3;
+ok sw("nba", "cba", "dba") == 0;
+
diff --git a/challenge-233/cheok-yin-fung/perl/ch-2.pl b/challenge-233/cheok-yin-fung/perl/ch-2.pl
new file mode 100644
index 0000000000..40f863985d
--- /dev/null
+++ b/challenge-233/cheok-yin-fung/perl/ch-2.pl
@@ -0,0 +1,22 @@
+# The Weekly challenge 233
+# Task 2 Frequency Sort
+use v5.30.0;
+use warnings;
+use List::MoreUtils qw/frequency/;
+
+sub fs {
+    my @ints = @_;
+    my %freq = frequency @ints;
+    @ints = sort { 
+        ($freq{$a} <=> $freq{$b})
+                || 
+        ($freq{$a} == $freq{$b} && $b<=>$a)} @ints;
+    return [@ints];
+}
+
+use Test::More tests=>4;
+use Test::Deep;
+cmp_deeply fs(1,1,2,2,2,3), [3,1,1,2,2,2];
+cmp_deeply fs(2,3,1,3,2), [1,3,3,2,2];
+cmp_deeply fs(-1,1,-6,4,5,-6,1,4,1), [5,-1,4,4,-6,-6,1,1,1];
+cmp_deeply fs(1,3,2), [3,2,1];
-- 
cgit