feat(challenge-175/lubos-kolouch/perl/ch-1/pl): Challenge 175 Task 1 LK Perl

1 files changed, 51 insertions, 0 deletions

diff --git a/challenge-175/lubos-kolouch/perl/ch-1.pl b/challenge-175/lubos-kolouch/perl/ch-1.pl
new file mode 100644
index 0000000000..311236484f
--- /dev/null
+++ b/challenge-175/lubos-kolouch/perl/ch-1.pl
@@ -0,0 +1,51 @@
+package main;
+use strict;
+use warnings;
+use DateTime;
+
+sub get_last_sunday {
+    my ( $year, $month ) = @_;
+
+    my $day =
+      DateTime->last_day_of_month( year => $year, month => $month )->day;
+
+    while (1) {
+        my $dt = DateTime->new(
+            year  => $year,
+            month => $month,
+            day   => $day
+        );
+
+        if ( $dt->day_of_week == 7 ) {
+            return $dt->ymd;
+        }
+
+        $day--;
+    }
+    return 1;
+}
+
+sub get_sundays {
+    my $year = shift;
+
+    my @sundays;
+
+    for ( 1 .. 12 ) {
+        push @sundays, get_last_sunday( $year, $_ );
+    }
+
+    return \@sundays;
+}
+
+use Test::More;
+
+is_deeply(
+    get_sundays(2022),
+    [
+        '2022-01-30', '2022-02-27', '2022-03-27', '2022-04-24',
+        '2022-05-29', '2022-06-26', '2022-07-31', '2022-08-28',
+        '2022-09-25', '2022-10-30', '2022-11-27', '2022-12-25'
+    ]
+);
+done_testing;
+1;