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Thanks Corion. The exact problem is about finding all the combinations. I find Math:Combinatorics useful as well. Here is what i did to gather all 2-item combinations from N item array. I wasn't sure how i would do it for any M items.
@a=(1..5); my @comb=""; for(my $i=0;$i<=$#a;$i++) { for(my $j=0;$j<=$#a;$j++) { next if $i==$j; if ($a[$i] < $a[$j]) { push @comb, "$a[$i] , $a[$j]" ; } else { push @comb, "$a[$j] , $a[$i]" ; } } } shift @comb; use List::MoreUtils qw(uniq); @comb = uniq(@comb);

In reply to Re^2: Sum of N elements in an M element array by abhay180
in thread Sum of N elements in an M element array by abhay180

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