Linux puskom-ProLiant-DL385-Gen10 5.4.0-150-generic #167~18.04.1-Ubuntu SMP Wed May 24 00:51:42 UTC 2023 x86_64

/usr/share/doc/liblist-moreutils-perl/examples/

//usr/share/doc/liblist-moreutils-perl/examples/41494.pl

 #!/usr/bin/perl 
use strict;
use warnings;

# use Carp;

use List::MoreUtils;

my @a = (10,11,12,13,14,15);
print "odd numbers: ", (List::MoreUtils::indexes {$_&1} @a), "\n";

for (;;) {
  List::MoreUtils::indexes {$_&1} @a;
}