1Sort::Key::Multi(3)   User Contributed Perl Documentation  Sort::Key::Multi(3)
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NAME

6       Sort::Key::Multi - simple multi-key sorts
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SYNOPSIS

9           use Sort::Key::Multi qw(sikeysort);
10           my @data = qw(foo0 foo1 bar34 bar0 bar34 bar33 doz4)
11           my @sisorted = sikeysort { /(\w+)(\d+)/} @data;
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DESCRIPTION

14       Sort::Key::Multi creates multi-key sorting subroutines and exports them
15       to the caller package.
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17       The names of the sorters are of the form "xxxkeysort" or
18       "xxxkeysort_inplace", where "xxx" determines the number and types of
19       the keys as follows:
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21           + "i" indicates an integer key, "u" indicates an unsigned integer
22           key, "n" indicates a numeric key, "s" indicates a string key and
23           "l" indicates a string key that obeys locale order configuration.
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25           + Type characters can be prefixed by "r" to indicate reverse order.
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27           + A number following a type character indicates that the key type
28           has to be repeated as many times (for instance "i3" is equivalent
29           to "iii" and "rs2" is equivalent to "rsrs").
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31           + Underscores ("_") can be freely used between type indicators.
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33       For instance:
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35          use Key::Sort::Multi qw(iirskeysort
36                                  i2rskeysort
37                                  i_i_rs__keysort
38                                  i2rs_keysort);
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40       exports to the caller package fourth identical sorting functions that
41       take two integer keys that are sorted in ascending order and one string
42       key that is sorted in descending order.
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44       The generated sorters take as first argument a subroutine that is used
45       to extract the keys from the values which are passed inside $_, for
46       example:
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48         my @data = qw(1.3.foo 1.3.bar 2.3.bar 1.4.bar 1.7.foo);
49         my @s = i2rs_keysort { split /\./, $_ } @data;
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SEE ALSO

52       For a more general multi-key sorter generator see Sort::Key::Maker.
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55       Copyright (C) 2006, 2014 by Salvador Fandiño <sfandino@yahoo.com>
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57       This library is free software; you can redistribute it and/or modify it
58       under the same terms as Perl itself, either Perl version 5.8.4 or, at
59       your option, any later version of Perl 5 you may have available.
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63perl v5.34.0                      2021-07-22               Sort::Key::Multi(3)
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