Solution to task 2

1 files changed, 54 insertions, 0 deletions

diff --git a/challenge-240/jo-37/perl/ch-2.pl b/challenge-240/jo-37/perl/ch-2.pl
new file mode 100755
index 0000000000..6df72e95c8
--- /dev/null
+++ b/challenge-240/jo-37/perl/ch-2.pl
@@ -0,0 +1,54 @@
+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0;
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV;
+usage: $0 [-examples] [-tests] [P...]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+P...
+    permutation of (0..N-1)
+
+EOS
+
+
+### Input and Output
+
+say "(@{build_array(@ARGV)})";
+
+
+### Implementation
+
+# Slice the array with itself.
+
+sub build_array {
+    [@_[@_]];
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+        is build_array(0, 2, 1, 5, 3, 4), [0, 1, 2, 4, 5, 3], 'example 1';
+        is build_array(5, 0, 1, 2, 3, 4), [4, 5, 0, 1, 2, 3], 'example 2';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}