Math::Combinatorics v.0.09

Math::Combinatorics is a Perl module that can perform combinations and permutations on lists. SYNOPSIS Available as an object oriented API. use Math::Combinatorics, my @n = qw(a b c), my $combinat = Math::Combinatorics->new(count => 2, data => [@n], ), print "combinations of 2 from: ".join(" ",@n)."n", print "------------------------".("--" x scalar(@n))."n", while(my @combo = $combinat->next_combination){ print join( , @combo)."n", } print "n", print "permutations of 3 from: ".join(" ",@n)."n", print "------------------------".("--" x scalar(@n))."n", while(my @permu = $combinat->next_permutation){ print join( , @permu)."n", } output: Or available via exported functions permute, combine, and factorial. use Math::Combinatorics, my @n = qw(a b c), print "combinations of 2 from: ".join(" ",@n)."n", print "------------------------".("--" x scalar(@n))."n", print join("n", map { join " ", @$_ } combine(2,@n)),"n", print "n", print "permutations of 3 from: ".join(" ",@n)."n", print "------------------------".("--" x scalar(@n))."n", print join("n", map { join " ", @$_ } permute(@n)),"n", Output: combinations of 2 from: a b c ------------------------------ a b a c b c permutations of 3 from: a b c ------------------------------ a b c a c b b a c b c a c a b c b a Output from both types of calls is the same, but the object-oriented approach consumes much less memory for large sets.

Math::Combinatorics is a Perl module that can perform combinations and permutations on lists. SYNOPSIS Available as an object oriented API. use Math::Combinatorics, my @n = qw(a b c), my $combinat = Math::Combinatorics->new(count => 2, data