add solution for week 30 task 1

1 files changed, 33 insertions, 0 deletions

diff --git a/challenge-030/steven-wilson/perl5/ch-1.pl b/challenge-030/steven-wilson/perl5/ch-1.pl
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+#!/usr/bin/env perl
+# Author: Steven Wilson
+# Date: 2019-10-14
+# Week: 030
+
+# Task #1
+# Write a script to list dates for Sunday Christmas between 2019 and
+# 2100. For example, 25 Dec 2022 is Sunday.
+
+use strict;
+use warnings;
+use feature qw/ say /;
+use DateTime;
+
+my $start_year = 2019;
+my $end_year   = 2100;
+my $sunday     = 7;
+my $dt         = DateTime->new(
+    year  => $start_year,
+    month => 12,
+    day   => 25
+);
+my @sunday_christmas;
+
+while ( $dt->year() <= $end_year ) {
+    if ( $dt->dow() == $sunday ) {
+        push @sunday_christmas, $dt->clone();
+    }
+    $dt->add( years => 1 );
+}
+
+say "List of Sunday Christmases between $start_year and $end_year:";
+say join "\n", @sunday_christmas;