From f7688a98c6ebed5f46b9c57209607c8adf2f772b Mon Sep 17 00:00:00 2001
From: Javier Luque <javier.luque@humanstate.com>
Date: Mon, 20 Jul 2020 09:35:33 +0100
Subject: Solutions challenge 70 - javier luque

---
 challenge-070/javier-luque/blog.txt     |  1 +
 challenge-070/javier-luque/perl/ch-1.pl | 19 +++++++++++++++++++
 challenge-070/javier-luque/perl/ch-2.pl | 29 +++++++++++++++++++++++++++++
 challenge-070/javier-luque/raku/ch-1.p6 | 17 +++++++++++++++++
 challenge-070/javier-luque/raku/ch-2.p6 | 27 +++++++++++++++++++++++++++
 5 files changed, 93 insertions(+)
 create mode 100644 challenge-070/javier-luque/blog.txt
 create mode 100644 challenge-070/javier-luque/perl/ch-1.pl
 create mode 100644 challenge-070/javier-luque/perl/ch-2.pl
 create mode 100644 challenge-070/javier-luque/raku/ch-1.p6
 create mode 100644 challenge-070/javier-luque/raku/ch-2.p6

diff --git a/challenge-070/javier-luque/blog.txt b/challenge-070/javier-luque/blog.txt
new file mode 100644
index 0000000000..0cabf620ee
--- /dev/null
+++ b/challenge-070/javier-luque/blog.txt
@@ -0,0 +1 @@
+https://perlchallenges.wordpress.com/2020/07/20/perl-weekly-challenge-070/
diff --git a/challenge-070/javier-luque/perl/ch-1.pl b/challenge-070/javier-luque/perl/ch-1.pl
new file mode 100644
index 0000000000..31ced7e1ce
--- /dev/null
+++ b/challenge-070/javier-luque/perl/ch-1.pl
@@ -0,0 +1,19 @@
+#!/usr/bin/perl
+# Test: ./ch-1.pl
+use Modern::Perl;
+
+say swap_chars('perlandraku', 3, 4);
+
+sub swap_chars {
+	my ($S, $C, $O) = @_;
+	my @s = split('', $S);
+	my $N = scalar(@s) - 1;
+
+	for (my $i = 1; $i <= $C; $i++) {
+		my $temp           = $s[$i % $N];
+		$s[$i % $N]        = $s[($i + $O) % $N];
+		$s[($i + $O) % $N] = $temp;
+	}
+
+	return join '', @s;
+}
diff --git a/challenge-070/javier-luque/perl/ch-2.pl b/challenge-070/javier-luque/perl/ch-2.pl
new file mode 100644
index 0000000000..2adf21f0c7
--- /dev/null
+++ b/challenge-070/javier-luque/perl/ch-2.pl
@@ -0,0 +1,29 @@
+#!/usr/bin/perl
+# Test: ./ch-2.pl
+use Modern::Perl;
+
+say gray_code(4);
+
+sub gray_code {
+	my $N = shift;
+	my @S1 = ('00','01','11','10');
+
+	while ($N > 2) {
+		# Flip the array
+		my @S2 = reverse @S1;
+
+		# Prefix
+		@S1 = map { '0' . $_ } @S1;
+		@S2 = map { '1' . $_ } @S2;
+
+		# Concatenate
+		push @S1, @S2;
+
+		$N--;
+	}
+
+	# Convert to decimal
+	@S1 = map { oct("0b" . $_) } @S1;
+
+	return '[' . (join ', ', @S1) . ']';
+}
diff --git a/challenge-070/javier-luque/raku/ch-1.p6 b/challenge-070/javier-luque/raku/ch-1.p6
new file mode 100644
index 0000000000..41086439c0
--- /dev/null
+++ b/challenge-070/javier-luque/raku/ch-1.p6
@@ -0,0 +1,17 @@
+# Test: perl6 ch-1.p6
+sub MAIN() {
+	say swap-chars('perlandraku', 3, 4);
+}
+
+sub swap-chars( Str $S, Int $C, Int $O) {
+	my $N = $S.chars;
+	my @s = $S.split('', :skip-empty);
+
+	loop (my $i = 1; $i <= $C; $i++) {
+		my $temp           = @s[$i % $N];
+		@s[$i % $N]        = @s[($i + $O) % $N];
+		@s[($i + $O) % $N] = $temp;
+	}
+
+	return @s.join('');
+}
diff --git a/challenge-070/javier-luque/raku/ch-2.p6 b/challenge-070/javier-luque/raku/ch-2.p6
new file mode 100644
index 0000000000..745f2f2f8c
--- /dev/null
+++ b/challenge-070/javier-luque/raku/ch-2.p6
@@ -0,0 +1,27 @@
+# Test: perl6 ch-2.p6
+sub MAIN() {
+	say gray-code(4);
+}
+
+sub gray-code(Int $N is copy where $N >= 2 && $N <=5 ) {
+	my @S1 = ('00','01','11','10');
+
+	while ($N > 2) {
+		# Flip the array
+		my @S2 = @S1.reverse;
+
+		# Prefix
+		@S1 = @S1.map({ '0' ~ $_ });
+		@S2 = @S2.map({ '1' ~ $_ });
+
+		# Concatenate
+		@S1 = flat @S1, @S2;
+
+		$N--;
+	}
+
+	# Convert to decimal
+	@S1 = @S1.map({ "0b$_".Int });
+
+	return @S1.perl;
+}
-- 
cgit