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

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

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

14       This is integers which have all digits different,
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16           0, ..., 9, 10, 12, 13, ..., 19, 20, 21, 23, 24, ...
17           # starting i=1 value=0
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19       For example 11 is not in the sequence because it has digit 1 appearing
20       twice.
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22       This is a finite sequence since the maximum value with distinct digits
23       is 9876543210.
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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.
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FUNCTIONS

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

47       Math::NumSeq, Math::NumSeq::Palindromes
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HOME PAGE

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

53       Copyright 2012, 2013, 2014, 2016, 2019 Kevin Ryde
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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.
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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.
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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/>.
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70perl v5.32.0                      2020-07-28       Math::NumSeq::Xenodromes(3)