gistfile1.txt

class Array
  def maps(*methods)
    methods = [methods].flatten
    self.map do |node|
      methods.inject(node) {|result, method| method.call(result) }
    end
  end
end

twice = lambda {|node| node * 2 }
triple = lambda {|node| node * 3 }
plus1 = lambda {|node| node + 1 }

puts (1..10).to_a.maps([plus1, triple, twice])
puts (1..10).to_a.maps(plus1, plus1, twice)