dannvix · April 16, 2012 09:38
diff --git a/customized_combinations.rb b/customized_combinations.rb
 # for C(3, 1) it should returns %w(100 010 001)

 def get_combinations (n, m)
  (n.downto 1).to_a.combination(m).map do |c|
    c.inject(0){ |s, k| s |= (1 << k-1) }.to_s(2).rjust(n, '0')
  end
 end

 puts get_combinations(10, 5)
	# for C(3, 1) it should returns %w(100 010 001)

	def get_combinations (n, m)
	(n.downto 1).to_a.combination(m).map do \|c\|
	c.inject(0){ \|s, k\| s \|= (1 << k-1) }.to_s(2).rjust(n, '0')
	end
	end

	puts get_combinations(10, 5)