#!/usr/bin/perl -w
# Copyright 2012, 2014 Kevin Ryde
# This file is part of Math-NumSeq.
#
# Math-NumSeq is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# Math-NumSeq is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with Math-NumSeq. If not, see <http://www.gnu.org/licenses/>.
use 5.004;
use strict;
use Test;
plan tests => 1;
use lib 't','xt', 'devel/lib';
use MyTestHelpers;
MyTestHelpers::nowarnings();
use MyOEIS;
use Math::NumSeq::SlopingExcluded;
# uncomment this to run the ### lines
#use Smart::Comments '###';
#------------------------------------------------------------------------------
# A109684 - sloping ternary excluded, in ternary
MyOEIS::compare_values
(anum => 'A109684',
func => sub {
my ($count) = @_;
my $seq = Math::NumSeq::SlopingExcluded->new (radix => 3);
my @got;
while (@got < $count) {
my ($i, $value) = $seq->next;
push @got, to_ternary_str($value);
}
return \@got;
});
#------------------------------------------------------------------------------
# A103202 - sloping binary numbers, ie. the included values
# cf A102370 unsorted
MyOEIS::compare_values
(anum => 'A103202',
func => sub {
my ($count) = @_;
my $seq = Math::NumSeq::SlopingExcluded->new;
my @got;
for (my $i = 0; @got < $count; $i++) {
if (! $seq->pred($i)) {
push @got, $i;
}
}
return \@got;
});
#------------------------------------------------------------------------------
# A103581 - sloping binary excluded, in binary
MyOEIS::compare_values
(anum => 'A103581',
func => sub {
my ($count) = @_;
my $seq = Math::NumSeq::SlopingExcluded->new (radix => 2);
my @got;
while (@got < $count) {
my ($i, $value) = $seq->next;
push @got, to_binary_str($value);
}
return \@got;
});
sub to_binary_str {
my ($n) = @_;
if (ref $n) {
my $str = $n->as_bin;
$str =~ s/^0b//;
return $str;
}
if ($n == 0) { return '0'; }
my $str = '';
my @bits;
while ($n) {
push @bits, $n%2;
$n = int($n/2);
}
return join('',reverse @bits);
}
sub to_ternary_str {
my ($n) = @_;
if ($n == 0) { return '0'; }
my $str = '';
my @digits;
while ($n) {
my $digit = $n % 3;
push @digits, $digit;
$n = int(($n-$digit)/3);
}
return join('',reverse @digits);
}
#------------------------------------------------------------------------------
exit 0;