#!/usr/bin/perl
# Learning RPerl, Section 3.4: Array Length & Negative Indices
# [[[ PREPROCESSOR ]]]
# <<< EXECUTE_ERROR: 'Use of uninitialized value $greeting_final in print' >>>
# [[[ HEADER ]]]
use RPerl;
use strict;
use warnings;
our $VERSION = 0.001_000;
# [[[ CRITICS ]]]
## no critic qw(ProhibitUselessNoCritic ProhibitMagicNumbers RequireCheckedSyscalls)  # USER DEFAULT 1: allow numeric values & print operator
## no critic qw(RequireInterpolationOfMetachars)  # USER DEFAULT 2: allow single-quoted control characters & sigils
# [[[ OPERATIONS ]]]
my string_arrayref $greetings        = ['hello', 'hi', 'howdy'];
my integer         $greetings_length = scalar @{$greetings};
my string $greeting_final            = $greetings->[$greetings_length];
print 'have $greeting_final = ', $greeting_final, "\n";