curry.rb

class SuperCurry
  def call(a, b)
    puts "#{a} + #{b} = #{a + b}"
  end

  def curry(*args)
    arity = method(:call).arity
    curried_args = args

    if curried_args.size == arity
      call(*curried_args)
    else
      -> (*args) { curry *(curried_args + args) }
    end
  end
end

s = SuperCurry.new

c = s.curry
c.call(1).call(2) #=> 1 + 2 = 3