scoring is functional!

combinations.rb

@@ -0,0 +1,16 @@
+#!/usr/bin/env ruby
+
+class Array
+	def combinations n
+		result = Array.new
+		if n > 0
+			(0 .. self.length - n).each do |i|
+				combs = self[i + 1 .. -1].combinations(n - 1)
+				combs = [[]] if combs.empty?
+				combs.collect {|comb| [self[i]] + comb}.each {|x| result << x}
+			end
+		end
+		return result
+	end
+end
+