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#!/usr/bin/perl
# Perl Weekly Challenge - 071
#
# Task 2 - Trim Linked List
#
# Author: Niels 'PerlBoy' van Dijke
use strict;
use warnings;
use Data::LinkedList;
sub printList ($$);
sub removeAt ($$);
my ($N) = @ARGV;
die "Argument must be a positive number"
unless (defined $N && $N =~ m#^[1-9][0-9]*#);
my @L = qw(1 2 3 4 5);
my $ll = Data::LinkedList->new();
$ll->add_all(@L);
printList('Given Linked List', $ll);
removeAt($ll, $N);
print "when \$N = $N\n";
printList('Output', $ll);
sub printList ($$) {
my ($label, $myLl) = @_;
printf "$label: %s\n", join(' -> ', $myLl->to_array);
}
sub removeAt ($$) {
my ($myLL, $i) = @_;
my $size = $myLL->size;
my $index = $size - $i > 0 ? $size - $i : 0;
$myLL->remove_at($index);
}
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