Solution to task 1

1 files changed, 53 insertions, 0 deletions

diff --git a/challenge-209/jo-37/perl/ch-1.pl b/challenge-209/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..0f3492dec6
--- /dev/null
+++ b/challenge-209/jo-37/perl/ch-1.pl
@@ -0,0 +1,53 @@
+#!/usr/bin/perl -s
+
+use v5.16;
+use Test2::V0;
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV == 1;
+usage: $0 [-examples] [-tests] [BITS]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+BITS
+    test if BITS form a "special bit sequence"
+
+EOS
+
+
+### Input and Output
+
+say 0 + bit_sequence(shift);
+
+
+### Implementation
+
+sub bit_sequence {
+	shift =~ /^(11|10|0)*0$/;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        ok  bit_sequence('100'),  'example 1';
+        ok !bit_sequence('1110'), 'example 2';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}