Math::NumSeq::ConcatNumbers -- concatenate digits of i, i+1
use Math::NumSeq::ConcatNumbers; my $seq = Math::NumSeq::ConcatNumbers->new; my ($i, $value) = $seq->next;
The concatenation of i and i+1 as digits, starting from i=0,
1, 12, 23, 34, 45, 56, 67, 78, 89, 910, 1011, 1112, ...
The default is decimal, or optional
radix parameter selects another base.
Since the two i and i+1 usually have the same number of digits, the resulting concatenated value has an even number of digits. The exception is at i=9 i+1=10, or i=99 i+1=100, etc, i=99..99 when the resulting value has an odd number of digits.
Being an even number of digits makes power gaps between for instance 89 and 1011, then 998999 and 10001001.
concat_count => $c selects how many of i,i+1,i+2,i+3,etc are concatenated. For example
concat_count => 3 gives
12, 123, 234, 345, 456, 567, 678, 789, 8910, 91011, 101112, 111213, ...
concat_count => 1 means all integers (the same as Math::NumSeq::All).
See "FUNCTIONS" in Math::NumSeq for the behaviour common to all path classes.
$seq = Math::NumSeq::ConcatNumbers->new ()
$seq = Math::NumSeq::ConcatNumbers->new (radix => $r, concat_count => $c)
Create and return a new sequence object.
Copyright 2011, 2012, 2013, 2014, 2016, 2018, 2019 Kevin Ryde
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/>.