Solution to task 1

1 files changed, 55 insertions, 0 deletions

diff --git a/challenge-244/jo-37/perl/ch-1.pl b/challenge-244/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..cb67cc00e9
--- /dev/null
+++ b/challenge-244/jo-37/perl/ch-1.pl
@@ -0,0 +1,55 @@
+#!/usr/bin/perl -s
+
+use v5.16;
+use Test2::V0;
+use List::Rank 'rank';
+
+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 "(@{[count_smaller(@ARGV)]})";
+
+
+### Implementation
+
+sub count_smaller {
+	map tr/=//dr - 1, rank @_;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is [count_smaller(8, 1, 2, 2, 3)], [4, 0, 1, 1, 3], 'example 1';
+        is [count_smaller(6, 5, 4, 8)], [2, 1, 0, 3], 'example 2';
+        is [count_smaller(2, 2, 2)], [0, 0, 0], 'example 3';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}