String::Examine - String comparisions and offset checking
use String::Examine; my $str = String::Examine::new('string1' => 'foo', $string2 => 'bar'); my $match = $str->compare(); my $match2 = $str->nocase_compare(); my $match3 = $str->regex_compare(); my $match4 = $str->vector_compare(); if($match || $match2 || $match3 || $match4) { my $offset = $str->str_pos(); } $str->string2("new_string"); $str->string1("new_string_also");
This module does basic string comparision, string1 is always the primary that string2 is matched against there is 4 builtin comparisions, 'compare()' which just does a basic eq/ne compare, 'nocase_compare()' which converts to lowercase and does eq/ne match, 'regex_compare()' which is simply string matching using m//, 'vector_compare()' a slightly more unusual comparision, converts each character into vector and concatenates the converted vectors and does a '==' there is instances on some strings where this has found a failure that other compares failed to find, however, due to the nature it is the most expensive compare.
The final function is 'str_pos()' in the event that a string doesn't match this function can be called to find the position in the string2 where it failed, it is offset from 0, ie:
string1 = 'aaaaba'; string2 = 'aaaaaa';
str_pos() would return '4'.
my $str = String::Examine::new();
You can pass the optional parameters 'string1', and 'string2' here.
$str->string1("string");
If a value is pass string1 will be set to the value if not it will just return the currently set value.
$str->string2("string");
If a value is pass string2 will be set to the value if not it will just return the currently set value.
$str->compare();
Performs a basic eq compare on string1 and string2, string1 is always primary, returns 0 strings are equal or 1 if not
$str->nocase_compare();
Exactly as compare() except it performs lc() first.
$str->regex_compare();
Performs the compare based on a regular expression using string1 =~ m/string2/ returns 0 if they are equal or 1 if not.
$str->vector_compare();
Converts the strings into 4bit vectors and performs a compare based on the concatenated output.
$str->str_pos();
Returns the offset number of string2 at the point at which the 2 strings do not match, counts from 0.
None by default.
Ben Maynard, <cpan@geekserv.com<gt> <http://www.webcentric-hosting.com<gt>
Copyright (C) 2006 by Ben Maynard, <cpan@geekserv.com<gt> <http://www.webcentric-hosting.com<gt>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.7 or, at your option, any later version of Perl 5 you may have available.
To install String::Examine, copy and paste the appropriate command in to your terminal.
cpanm
cpanm String::Examine
CPAN shell
perl -MCPAN -e shell install String::Examine
For more information on module installation, please visit the detailed CPAN module installation guide.