On the off chance that you are looking for a way of sorting a subsection of an array (hard to tell as you give no sample code or data) I offer the following:

use strict;
use warnings;

my @values = qw(a b c 9 8 7 1 2 3 6 4 5 x y z);

@values[3 .. 11] = sort {$a <=> $b} @values[3 .. 11];
print "@values";
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Prints:

a b c 1 2 3 4 5 6 7 8 9 x y z
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