5 files changed, 95 insertions, 0 deletions
diff --git a/challenge-042/javier-luque/blog.txt b/challenge-042/javier-luque/blog.txt
new file mode 100644
index 0000000000..b23134bfd4
--- /dev/null
+++ b/challenge-042/javier-luque/blog.txt
@@ -0,0 +1 @@
+https://perlchallenges.wordpress.com/2020/01/06/perl-weekly-challenge-042/
diff --git a/challenge-042/javier-luque/perl/ch-1.pl b/challenge-042/javier-luque/perl/ch-1.pl
new file mode 100644
index 0000000000..5a58151aa2
--- /dev/null
+++ b/challenge-042/javier-luque/perl/ch-1.pl
@@ -0,0 +1,14 @@
+#!/usr/bin/perl
+# Test: ./ch-1.pl
+use strict;
+use warnings;
+use feature qw /say/;
+
+for my $i (1..50) {
+    say 'Decimal '  . $i .
+        ' = Octal ' . to_octal($i);
+}
+
+sub to_octal {
+    return sprintf('%o', shift);
+}
diff --git a/challenge-042/javier-luque/perl/ch-2.pl b/challenge-042/javier-luque/perl/ch-2.pl
new file mode 100644
index 0000000000..04a6078fd6
--- /dev/null
+++ b/challenge-042/javier-luque/perl/ch-2.pl
@@ -0,0 +1,38 @@
+#!/usr/bin/perl
+# test: ./ch2.pl
+use strict;
+use warnings;
+use feature qw /say/;
+use constant {
+    MAX_STRING_LENGTH => 4
+};
+
+for my $i ( 1 .. 20 ) {
+    my $string = generate_random_string();
+    my $ok = (validate_string($string)) ? 'OK ' : 'NOT OK';
+    say $string . ' - ' . $ok;
+}
+
+sub generate_random_string {
+    my $length = int(rand(MAX_STRING_LENGTH - 1) + 2);
+    my $string;
+
+    for my $i (1 .. $length ) {
+        $string .= (int(rand(2))) ? '(' : ')';
+    }
+
+    return $string;
+}
+
+sub validate_string {
+    my $open_p;
+
+    for my $char (split('', shift)) {
+        $open_p++ if ($char eq '(');
+        $open_p-- if ($char eq ')');
+
+        return 0 if ($open_p < 0);
+    }
+
+    return ($open_p == 0);
+}
diff --git a/challenge-042/javier-luque/raku/ch-1.p6 b/challenge-042/javier-luque/raku/ch-1.p6
new file mode 100644
index 0000000000..97022c1f81
--- /dev/null
+++ b/challenge-042/javier-luque/raku/ch-1.p6
@@ -0,0 +1,13 @@
+# Test: perl6 ch-1.p6
+use v6.d;
+
+sub MAIN() {
+    for (1..50) -> $i {
+        say 'Decimal '  ~ $i ~
+            ' = Octal ' ~ to-octal($i);
+    }
+}
+
+sub to-octal(Int $i) {
+    return sprintf('%o', $i);
+}
diff --git a/challenge-042/javier-luque/raku/ch-2.p6 b/challenge-042/javier-luque/raku/ch-2.p6
new file mode 100644
index 0000000000..8d19010e59
--- /dev/null
+++ b/challenge-042/javier-luque/raku/ch-2.p6
@@ -0,0 +1,29 @@
+# Test: perl6 ./ch-2.p6
+use v6.d;
+constant $MAX_STRING_LENGTH = 4;
+
+sub MAIN () {
+    for ( 1 .. 20 ) {
+        my $string = generate-random-string();
+        my $ok = (validate-string($string)) ?? 'OK ' !! 'NOT OK';
+        say $string ~ ' - ' ~ $ok;
+    }
+}
+
+sub generate-random-string {
+    return <( )>.roll(
+        Int((2 .. $MAX_STRING_LENGTH + 1).rand)
+    ).join;
+}
+
+sub validate-string(Str $word) {
+    my $open_p;
+
+    for $word.comb -> $letter {
+        $open_p++ if ($letter eq '(');
+        $open_p-- if ($letter eq ')');
+        return 0 if ($open_p < 0);
+    }
+
+    return ($open_p == 0);
+}