|Number::RecordLocator(3pm)||User Contributed Perl Documentation||Number::RecordLocator(3pm)|
Number::RecordLocator - Encodes integers into a short and easy to read and pronounce "locator string"
use Number::RecordLocator; my $generator = Number::RecordLocator->new(); my $string = $generator->encode("123456"); # $string = "5RL2"; my $number = $generator->decode($string); # $number = "123456";
"Number::RecordLocator" encodes integers into a 32 character "alphabet" designed to be short and easy to read and pronounce. The encoding maps:
0 to O 1 to I S to F B to P
With a 32 bit encoding, you can map 33.5 million unique ids into a 5 character code.
This certainly isn't an exact science and I'm not yet 100% sure of the encoding. Feedback is much appreciated.
Instantiate a new "Number::RecordLocator" object. Right now, we don't actually store any object-specific data, but in the future, we might.
Initializes our integer to character and character to integer mapping tables.
Takes an integer. Returns a Record Locator string.
Takes a record locator string and returns an integer. If you pass in a string containing an invalid character, it returns undef.
To compare a Record Locator string with another you can do:
print "ALWAYS TRUE\n" if $generator->decode("B0") == $generator->decode("PO");
However, this method provides an alternative:
my $rl_string = $generator->encode(725); print "ALWAYS TRUE\n" if $generator->canonicalize("b0") eq $rl_string; print "ALWAYS TRUE\n" if $generator->canonicalize("BO") eq $rl_string; print "ALWAYS TRUE\n" if $generator->canonicalize("P0") eq $rl_string; print "ALWAYS TRUE\n" if $generator->canonicalize("po") eq $rl_string;
This is primarily useful if you store the record locator rather than just the original integer and don't want to have to decode your strings to do comparisons.
Takes a general Record Locator string and returns one with character mappings listed in "DESCRIPTION" applied to it. This allows string comparisons to work. This returns "undef" if a non-alphanumeric character is found in the string.
BUGS AND LIMITATIONS¶
No bugs have been reported.
Please report any bugs or feature requests to "firstname.lastname@example.org", or through the web interface at <http://rt.cpan.org>.
Jesse Vincent "<email@example.com>"
LICENCE AND COPYRIGHT¶
Copyright (c) 2006, Best Practical Solutions, LLC. All rights reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.