Solution to task 2

1 files changed, 59 insertions, 0 deletions

diff --git a/challenge-228/jo-37/perl/ch-2.pl b/challenge-228/jo-37/perl/ch-2.pl
new file mode 100755
index 0000000000..ce0d921515
--- /dev/null
+++ b/challenge-228/jo-37/perl/ch-2.pl
@@ -0,0 +1,59 @@
+#!/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: $0 [-examples] [-tests] [--] [N...]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+N...
+    list of numbers
+
+EOS
+
+
+### Input and Output
+
+say zero_array(@ARGV);
+
+
+### Implementation
+
+sub zero_array {
+    my @sort = sort {$a <=> $b} @_;
+    my ($head, $count);
+    while (@_) {
+        ($head = shift) == $sort[0] ? shift @sort : push @_, $head;
+        $count++;
+    }
+    $count;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is zero_array(3, 4, 2), 5, 'example 1';
+        is zero_array(1, 2, 3), 3, 'example 2';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}