PeselValidate.rb

class PeselValidate
	@@weights = [1, 3, 7, 9, 1, 3, 7, 9, 1, 3, 1]

	def initialize(str1)
		@pesel = str1
	end

	def validate
		numbers = @pesel.split(//).map(&:to_i)
		sum = 0

		numbers.each_with_index do |number, position|
			sum += number * @@weights[position]
		end

		sum % 10 == 0
	end
end