1Text::Levenshtein::DameUrsaeur::CXoSn(t3r)ibuted Perl DoTceuxmte:n:tLaetvieonnshtein::Damerau::XS(3)
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NAME

6       Text::Levenshtein::Damerau::XS - XS Damerau Levenshtein edit distance.
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SYNOPSIS

9               use Text::Levenshtein::Damerau::XS qw/xs_edistance/;
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11               print xs_edistance('Neil','Niel');
12               # prints 1
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DESCRIPTION

15       Returns the true Damerau Levenshtein edit distance of strings with
16       adjacent transpositions. XS implementation (requires a C compiler).
17       Works correctly with utf8.
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19               use Text::Levenshtein::Damerau::XS qw/xs_edistance/;
20               use utf8;
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22               xs_edistance('ⓕⓞⓤⓡ','ⓕⓤⓞⓡ'),
23               # prints 1
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25       Speed improvements over Text::Levenshtein::Damerau::PP:
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27               # Text::Levenshtein::Damerau::PP::pp_edistance("four","fuor")
28               timethis 1000000: 381 wallclock secs (380.45 usr +  0.01 sys =
29                        380.46 CPU) @ 2628.40/s (n=1000000)
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31               # Text::Levenshtein::Damerau::XS::xs_edistance("four","fuor")
32               timethis 1000000: 19 wallclock secs (19.43 usr +  0.00 sys =
33                        19.43 CPU) @ 51466.80/s (n=1000000)
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METHODS

36   xs_edistance
37       Arguments: source string and target string.
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39       ·   OPTIONAL 3rd argument int (max distance; only return results with
40           $int distance or less). 0 = unlimited. Default = 0.
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42       Returns: int that represents the edit distance between the two
43       argument. Stops calculations and returns -1 if max distance is set and
44       reached.
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46       Wrapper function to take the edit distance between a source and target
47       string using XS algorithm implementation.
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49               use Text::Levenshtein::Damerau::XS qw/xs_edistance/;
50               print xs_edistance('Neil','Niel');
51               # prints 1
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53              # Max edit distance of 1
54               print xs_edistance('Neil','Niely',1); # distance is 2
55               # prints -1
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TODO

58       ·   Handle very large strings of text. Can be accomplished by reworking
59           the scoring matrix or writing to disk.
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61       ·   Add from_file methods.
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63       ·   Add binary/byte string support.
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SEE ALSO

66       ·   Text::Levenshtein::Damerau
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68       ·   Text::Levenshtein::Damerau::PP
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BUGS

71       Please report bugs to:
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73       <https://rt.cpan.org/Public/Dist/Display.html?Name=Text-Levenshtein-Damerau-XS>
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AUTHOR

76       Nick Logan <ugexe@cpan.org>
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79       This library is free software; you can redistribute it and/or modify it
80       under the same terms as Perl itself.
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84perl v5.30.1                      2020-01-30 Text::Levenshtein::Damerau::XS(3)
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