| String::Koremutake(3pm) | User Contributed Perl Documentation | String::Koremutake(3pm) |
String::Koremutake - Convert to/from Koremutake Memorable Random Strings
use String::Koremutake; my $k = String::Koremutake->new; my $s = $k->integer_to_koremutake(65535); # botretre my $i = $k->koremutake_to_integer('koremutake'); # 10610353957
The String::Koremutake module converts to and from Koremutake Memorable Random Strings.
The term "Memorable Random String" was thought up by Sean B. Palmer as a name for those strings like dopynl, glargen, glonknic, spoopwiddle, and kebble etc. that don't have any conventional sense, but can be used as random identifiers, especially in URIs to keep them persistent. See http://infomesh.net/2001/07/MeRS/
Koremutake is a MeRS algorithm which is used by Shorl (http://shorl.com/koremutake.php). As they explain: "It is, in plain language, a way to express any large number as a sequence of syllables. The general idea is that word-sounding pieces of information are a lot easier to remember than a sequence of digits."
The new() method is the constructor:
The integer_to_koremutake method converts a positive integer to a Koremutake string:
my $s = $k->integer_to_koremutake(65535); # botretre
The koremutake_to_integer method converts a Koremutake string to the integer it represents:
my $i = $k->koremutake_to_integer('koremutake'); # 10610353957
You need to "use bigint;" if you want String::Koremutake to work with integers larger than what fits into a normal Perl integer before it gets converted to a floating point number on your platform.
Without "use bigint;" big integers get converted to fixed precision floating point numbers:
$ perl -MString::Koremutake -le '
my $a = 65536**4;
my $k = String::Koremutake->new;
foreach my $b ($a, $a+1, $a+2, $a+3) {
print "$b: ".$k->integer_to_koremutake($b);
}'
1.84467440737096e+19: bibababababababababa
1.84467440737096e+19: bibababababababababa
1.84467440737096e+19: bibababababababababa
1.84467440737096e+19: bibababababababababa
If you use that large integers, you should add "use bigint;" to your program which solves that issue:
$ perl -Mbigint -MString::Koremutake -le '
my $a = 65536**4;
my $k = String::Koremutake->new;
foreach my $b ($a, $a+1, $a+2, $a+3) {
print "$b: ".$k->integer_to_koremutake($b);
}'
18446744073709551616: bibababababababababa
18446744073709551617: bibababababababababe
18446744073709551618: bibababababababababi
18446744073709551619: bibababababababababo
It will likely save you from other issues with big integers, too.
Note that "foreach my $b ($a .. $a+3)" doesn't work either as the ".." operator can't be overloaded. See CAVEATS in "perldoc bigint" for details.
No bugs have been reported.
Please report any bugs or feature requests to "bug-String-Koremutake@rt.cpan.org", or through the web interface at <http://rt.cpan.org>.
Leon Brocard "acme@astray.com"
Copyright (c) 2005, Leon Brocard "acme@astray.com". All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
| 2015-06-06 | perl v5.20.2 |