Math::NumSeq::DigitCountLow -- count of given low digits
use Math::NumSeq::DigitCountLow; my $seq = Math::NumSeq::DigitCountLow->new (radix => 10, digit => 9); my ($i, $value) = $seq->next;
The count of how many of a given digit are at the low end of $i
when written out in a given radix. The default is to count how many low 9s in decimal. For example i=9599 has value 2 as there's two consecutive 9s at the low end.
See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence classes.
$seq = Math::NumSeq::DigitCountLow->new (radix => $r, digit => $d)
Create and return a new sequence object.
digit
can be -1 to mean digit radix-1, the highest digit in the radix.
$value = $seq->ith($i)
Return how many of the given digit
is in $i
written in radix
.
$bool = $seq->pred($value)
Return true if $value
might occur as a digit count, which means simply $value>=0
.
Math::NumSeq, Math::NumSeq::DigitCount, Math::NumSeq::DigitCountHigh
http://user42.tuxfamily.org/math-numseq/index.html
Copyright 2010, 2011, 2012, 2013, 2014 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.
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