class Tsubaki::MyNumber
Public Class Methods
calc_check_digit(digits)
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# File lib/tsubaki/my_number.rb, line 9 def self.calc_check_digit(digits) fail 'must be a 11 digit number' unless digits =~ /\A\d{11}\z/ arr = digits.chars.map(&:to_i).reverse! rem = (1..11).inject(0) do |sum, n| pn = arr[n - 1] qn = (n <= 6) ? (n + 1) : (n - 5) sum + pn * qn end % 11 rem <= 1 ? 0 : (11 - rem) end
new(digits, options = {})
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# File lib/tsubaki/my_number.rb, line 22 def initialize(digits, options = {}) @digits = digits.to_s.freeze @options = options end
rand()
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# File lib/tsubaki/my_number.rb, line 3 def self.rand digits = 11.times.map { Kernel.rand(10) }.join check_digit = calc_check_digit(digits) "#{digits}#{check_digit}" end
Public Instance Methods
valid?()
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# File lib/tsubaki/my_number.rb, line 27 def valid? @options[:strict] ? valid_check_digit? : valid_pattern? end
valid_check_digit?()
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# File lib/tsubaki/my_number.rb, line 35 def valid_check_digit? return false unless valid_pattern? plain_digits[-1].to_i == self.class.calc_check_digit(plain_digits[0, 11]).to_i end
valid_pattern?()
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# File lib/tsubaki/my_number.rb, line 31 def valid_pattern? !!(plain_digits =~ /\A\d{12}\z/) end
Private Instance Methods
plain_digits()
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# File lib/tsubaki/my_number.rb, line 42 def plain_digits @plain_digits ||= @digits.split(@options[:divider]).join('') end