G'day Laurent,

An alternative to this could be a Guttman-Rosler Transform. In the following, I've kept the same data, in the same order; and, I retained the same basic code layout for the transform.

#!/usr/bin/env perl -l

use strict;
use warnings;

my @array = qw{
    Patch_11.4 Patch_1.0 Patch_2.0 Patch_3.1 Patch_5.0
    Patch_4.2 Patch_6.0 Patch_11.0 Patch_7.0 Patch_8.0
    Patch_9.3 Patch_10.2 Patch_11.2
};

@array = map substr($_, 2),
         sort
         map pack("C2", /^Patch_(\d+)\.(\d+)/) . $_, @array;

print for @array;
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The output is identical to what you show.

Just as a side note, given the list context provided by "[ ... ]", regex captures will be evaluated in that context, and your second map would only need a single statement. Here's a quick one-liner to explain:

$ perl -E 'my @x = qw{X1.2 X3.4}; say "@$_" for map { [ $_, /X(\d+)\.(
+\d+)/ ] } @x'
X1.2 1 2
X3.4 3 4
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