Add Perl solutions to challenge 019

4 files changed, 229 insertions, 0 deletions

diff --git a/challenge-019/paulo-custodio/README b/challenge-019/paulo-custodio/README
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+++ b/challenge-019/paulo-custodio/README
@@ -0,0 +1 @@
+Solution by Paulo Custodio
diff --git a/challenge-019/paulo-custodio/perl/ch-1.pl b/challenge-019/paulo-custodio/perl/ch-1.pl
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+++ b/challenge-019/paulo-custodio/perl/ch-1.pl
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+#!/usr/bin/env perl
+
+# Challenge 019
+#
+# Task #1
+# Write a script to display months from the year 1900 to 2019 where you find 
+# 5 weekends i.e. 5 Friday, 5 Saturday and 5 Sunday.
+
+use strict;
+use warnings;
+use 5.030;
+use Date::Calc qw( Nth_Weekday_of_Month_Year );
+use constant {
+	Friday => 5,
+	Saturday => 6,
+	Sunday => 7 
+};
+
+for my $year (1900 .. 2019) {
+	for my $month (1 .. 12) {
+		say sprintf("%04d-%02d", $year, $month) if five_weekends($year, $month);
+	}
+}
+
+
+sub five_weekends {
+	my($year, $month) = @_;
+	return unless Nth_Weekday_of_Month_Year($year, $month, Friday, 5);
+	return unless Nth_Weekday_of_Month_Year($year, $month, Saturday, 5);
+	return unless Nth_Weekday_of_Month_Year($year, $month, Sunday, 5);
+	return 1;
+}
diff --git a/challenge-019/paulo-custodio/perl/ch-2.pl b/challenge-019/paulo-custodio/perl/ch-2.pl
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+++ b/challenge-019/paulo-custodio/perl/ch-2.pl
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+#!/usr/bin/env perl
+
+# Challenge 019
+#
+# Task #2
+# Write a script that can wrap the given paragraph at a specified column using the greedy algorithm.
+
+use strict;
+use warnings;
+use 5.030;
+
+my $text = "";
+while (<>) {
+	$text .= $_;
+}
+print wrap($text, 72);
+
+
+sub wrap {
+	my($text, $column) = @_;
+	$column ||= 72;
+	
+	my $output = "";
+	my $sep = "";
+	my $pos = 0;
+	for my $word (split(' ', $text)) {
+		if ($pos + length($sep) + length($word) >= $column) {
+			$output .= "\n";
+			$sep = "";
+			$pos = 0;
+		}
+		$output .= $sep . $word;
+		$pos += length($sep) + length($word);
+		$sep = " ";
+	}
+	$output .= "\n";
+	return $output;
+}
diff --git a/challenge-019/paulo-custodio/test.pl b/challenge-019/paulo-custodio/test.pl
new file mode 100644
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+++ b/challenge-019/paulo-custodio/test.pl
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+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use Test::More;
+use 5.030;
+use Path::Tiny;
+
+is capture("perl perl/ch-1.pl"), <<END;
+1901-03
+1902-08
+1903-05
+1904-01
+1904-07
+1905-12
+1907-03
+1908-05
+1909-01
+1909-10
+1910-07
+1911-12
+1912-03
+1913-08
+1914-05
+1915-01
+1915-10
+1916-12
+1918-03
+1919-08
+1920-10
+1921-07
+1922-12
+1924-08
+1925-05
+1926-01
+1926-10
+1927-07
+1929-03
+1930-08
+1931-05
+1932-01
+1932-07
+1933-12
+1935-03
+1936-05
+1937-01
+1937-10
+1938-07
+1939-12
+1940-03
+1941-08
+1942-05
+1943-01
+1943-10
+1944-12
+1946-03
+1947-08
+1948-10
+1949-07
+1950-12
+1952-08
+1953-05
+1954-01
+1954-10
+1955-07
+1957-03
+1958-08
+1959-05
+1960-01
+1960-07
+1961-12
+1963-03
+1964-05
+1965-01
+1965-10
+1966-07
+1967-12
+1968-03
+1969-08
+1970-05
+1971-01
+1971-10
+1972-12
+1974-03
+1975-08
+1976-10
+1977-07
+1978-12
+1980-08
+1981-05
+1982-01
+1982-10
+1983-07
+1985-03
+1986-08
+1987-05
+1988-01
+1988-07
+1989-12
+1991-03
+1992-05
+1993-01
+1993-10
+1994-07
+1995-12
+1996-03
+1997-08
+1998-05
+1999-01
+1999-10
+2000-12
+2002-03
+2003-08
+2004-10
+2005-07
+2006-12
+2008-08
+2009-05
+2010-01
+2010-10
+2011-07
+2013-03
+2014-08
+2015-05
+2016-01
+2016-07
+2017-12
+2019-03
+END
+
+path("input.txt")->spew(<<END);
+In the beginning God created the heavens and the earth. Now the earth was formless and empty, 
+darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.
+And God said, "Let there be light," and there was light. God saw that the light was good, and
+he separated the light from the darkness. God called the light "day," and the darkness he called "night." 
+And there was evening, and there was morning-the first day.
+END
+
+
+is capture("perl perl/ch-2.pl < input.txt"), <<END;
+In the beginning God created the heavens and the earth. Now the earth
+was formless and empty, darkness was over the surface of the deep, and
+the Spirit of God was hovering over the waters. And God said, "Let
+there be light," and there was light. God saw that the light was good,
+and he separated the light from the darkness. God called the light
+"day," and the darkness he called "night." And there was evening, and
+there was morning-the first day.
+END
+
+unlink "input.txt";
+done_testing;
+
+sub capture {
+	my($cmd) = @_;
+	my $out = `$cmd`;
+	$out =~ s/[ \t\v\f\r]*\n/\n/g;
+	return $out;
+}