1Math::NumSeq::XenodromeUss(e3r)Contributed Perl DocumentMaattiho:n:NumSeq::Xenodromes(3)
2
3
4

NAME

6       Math::NumSeq::Xenodromes -- integers with all digits unique
7

SYNOPSIS

9        use Math::NumSeq::Xenodromes;
10        my $seq = Math::NumSeq::Xenodromes->new;
11        my ($i, $value) = $seq->next;
12

DESCRIPTION

14       This is integers which have all digits different,
15
16           0, ..., 9, 10, 12, 13, ..., 19, 20, 21, 23, 24, ...
17           # starting i=1 value=0
18
19       For example 11 is not in the sequence because it has digit 1 appearing
20       twice.
21
22       This is a finite sequence since the maximum value with distinct digits
23       is 9876543210.
24
25       The optional "radix" parameter controls the base used for the digits
26       (default decimal).  In binary for example there's just three values, 0,
27       1, 2.
28

FUNCTIONS

30       See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence
31       classes.
32
33       "$seq = Math::NumSeq::Xenodromes->new ()"
34       "$seq = Math::NumSeq::Xenodromes->new (radix => $integer)"
35           Create and return a new sequence object.
36
37   Random Access
38       "$value = $seq->ith($i)"
39           Return the $i'th xenodrome, or "undef" if $i is beyond the end of
40           the sequence.
41
42       "$bool = $seq->pred($value)"
43           Return true if $value is a xenodrome, ie. an integer with all
44           digits distinct.
45

SEE ALSO

47       Math::NumSeq, Math::NumSeq::Palindromes
48

HOME PAGE

50       <http://user42.tuxfamily.org/math-numseq/index.html>
51

LICENSE

53       Copyright 2012, 2013, 2014, 2016, 2019 Kevin Ryde
54
55       Math-NumSeq is free software; you can redistribute it and/or modify it
56       under the terms of the GNU General Public License as published by the
57       Free Software Foundation; either version 3, or (at your option) any
58       later version.
59
60       Math-NumSeq is distributed in the hope that it will be useful, but
61       WITHOUT ANY WARRANTY; without even the implied warranty of
62       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
63       General Public License for more details.
64
65       You should have received a copy of the GNU General Public License along
66       with Math-NumSeq.  If not, see <http://www.gnu.org/licenses/>.
67
68
69
70perl v5.32.0                      2020-07-28       Math::NumSeq::Xenodromes(3)
Impressum