Re: Which Permute or other module can give me all possible subsets of 6 numbers out of 40?

If I understand you correctly, this is the basic example of NestedLoops from Algorithm::Loops:

use Data::Dumper;
use Algorithm::Loops 'NestedLoops';

my $depth = 6;
my $range = 40;

NestedLoops( [[1..$range], ( sub { [$_+1..$range] } ) x ($depth-1)], s
+ub { print Dumper \@_})
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If you want to create all those pairings in memory, NestedLoops can also give you the list instead of invoking a callback.

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