Add a Perl module for performing the action

This allows us to more easily test the functionality and add new
behaviours.

1 files changed, 14 insertions, 0 deletions

diff --git a/incdec.pm b/incdec.pm
new file mode 100644
index 0000000..96b28c8
--- /dev/null
+++ b/incdec.pm
@@ -0,0 +1,14 @@
+use strict;
+use warnings;
+
+package incdec;
+
+sub incdec {
+	my ($line) = @_;
+
+	$line =~ s/(\d+)/$1+1/e;
+
+	return $line;
+}
+
+1;